WorldWideScience

Sample records for civil engineering structures

  1. Passive control of civil engineering structures

    OpenAIRE

    Braz-César, M.T.; Barros, Rui

    2013-01-01

    Structural control has been a major research area i n aerospace engineering aimed at solving very complex problems related with analysis and des ign of flexible structures. The efficiency of these strategies to improve the performance of s everal structural systems suggests its potential to reduce damage and control earthquake4i nduced response in civil structures. Therefore, this technology has been well accepted b y structural engineers as a feasible approach t...

  2. Optimal Vibration Control of Civil Engineering Structures

    DEFF Research Database (Denmark)

    Thesbjerg, Leo

    In designing large civil engineering structures, an important consideration is prospective dynamic loadings which may include earthquake ground motion, wind gusts, severe sea states and moving vehicles, rotating and reciprocating machinery and others. successful design of such structures requires...... providing for the safety and integrity of the structure, and in some cases also providing for a measure of comfort for the occupants during such loading which the structure and its occupants must endure. Due to these uncertainties, the civil engineering community has traditionally adopted a very...

  3. Vibrational Based Inspection of Civil Engineering Structures

    DEFF Research Database (Denmark)

    Rytter, Anders

    at the University of Aalborg from 1988 to 1991. Secondly, a research project, In-Field Vibration Based Inspection of Civil Engineering Structures, which has been performed as a pilot project by the Consulting Engineers Rambøll, Hannemann and Højlund in cooperation with the department of Building Technology...

  4. Structural Control Systems Implemented in Civil Engineering

    Directory of Open Access Journals (Sweden)

    Cristian Pastia

    2005-01-01

    Full Text Available Over the past three decades, a great interest has been generated by the use of protection systems to mitigate the effects of dynamic environmental hazards on civil engineering structures, such as earthquakes and strong wind. These control systems develop controllable forces to add or dissipate energy in a structure, or both, due to specific devices integrated with sensors, controllers and real – time process to operate. The paper includes the advantages of these technologies consisting of the following sections: 1 represents an introduction, 2 deals with passive control system, 3 regards some control techniques, 4 concerns hybrid control techniques, 5 contains semi – active control techniques, and 6 is dedicated to general conclusions.

  5. Structural and Topology Optimization of Complex Civil Engineering Structures

    DEFF Research Database (Denmark)

    Hald, Frederik; Kirkegaard, Poul Henning; Andersen, Lars Vabbersgaard

    2013-01-01

    This paper shows the use of topology optimization for finding an optimized form for civil engineering structures. Today topology optimization and shape optimization have been integrated in several commercial finite element codes. Here, the topology of two complex civil engineering structures...... patterns and dynamic loading lead to implantation of constraints of the optimization. These constraints will influence and change the final topology....... will be optimized using the commercial code Abaqus CAE. The structures are: a bucket foundation for an off-shore submarine structure for a wind turbine, and a pedestrian footbridge over a freeway. The topology optimization method used is the SIMP method, based on minimizing the structures' compliance. Complex load...

  6. Advances in Structural Control in Civil Engineering in China

    Directory of Open Access Journals (Sweden)

    Hongnan Li

    2010-01-01

    Full Text Available In the recent years, much attention has been paid to the research and development of structural control techniques with particular emphasis on alleviation of wind and seismic responses of buildings and bridges in China. Structural control in civil engineering has been developed from the concept into a workable technology and applied into practical engineering structures. The aim of this paper is to review a state of the art of researches and applications of structural control in civil engineering in China. It includes the passive control, active control, hybrid controland semiactive control. Finally, the possible future directions of structural control in civil engineering in China are presented.

  7. M.Sc. in Civil and Structural Engineering

    DEFF Research Database (Denmark)

    The following pages contain a list of project ideas proposed by the scientific staff at the Department of Civil Engineering, Aalborg University, and a number of companies. Most of the project ideas in this catalogue may form the basis for long and short master projects as well as regular 3rd...... semester projects at the M.Sc. programme in Civil and Structural Engineering....

  8. M.Sc. in Civil and Structural Engineering

    DEFF Research Database (Denmark)

    This catalogue contains a list of project ideas proposed by the scientific staff at the Department of Civil Engineering, Aalborg University, and a number of companies. Most of the project ideas in this catalogue may form the basis for long and short candidate projects as well as regular 3rd...... semester projects at the M.Sc. programme in Civil and Structural Engineering....

  9. M.Sc. in Civil and Structural Engineering

    DEFF Research Database (Denmark)

    The catalogue contain a list of project ideas proposed by the scientific staff at the Department of Civil Engineering, Aalborg University, and a number of companies. Most of the project ideas in this catalogue may form the basis for long and short candidate projects as well as regular 3rd semester...... projects at the M.Sc. programme in Civil and Structural Engineering....

  10. M.Sc. in Civil and Structural Engineering

    DEFF Research Database (Denmark)

    Clausen, Johan

    The report contain a list of project ideas proposed by the scientific staff at the Department of Civil Engineering, Aalborg University, and a number of companies. Most of the project ideas in this catalogue may form the basis for long and short candidate projects as well as regular 3rd semester...... projects at the M.Sc. programme in Civil and Structural Engineering....

  11. Advances in Structural Control in Civil Engineering in China

    OpenAIRE

    Hongnan Li; Linsheng Huo

    2010-01-01

    In the recent years, much attention has been paid to the research and development of structural control techniques with particular emphasis on alleviation of wind and seismic responses of buildings and bridges in China. Structural control in civil engineering has been developed from the concept into a workable technology and applied into practical engineering structures. The aim of this paper is to review a state of the art of researches and applications of structural control in civil enginee...

  12. Automated Modal Parameter Estimation of Civil Engineering Structures

    DEFF Research Database (Denmark)

    Andersen, Palle; Brincker, Rune; Goursat, Maurice;

    In this paper the problems of doing automatic modal parameter extraction of ambient excited civil engineering structures is considered. Two different approaches for obtaining the modal parameters automatically are presented: The Frequency Domain Decomposition (FDD) technique and a correlation...

  13. Situated learning methodologies and assessment in civil engineering structures education

    Science.gov (United States)

    Bertz, Michael Davis

    This thesis describes an overarching study of civil engineering undergraduate structural education through student performance in recalling and applying basic structural engineering knowledge, and the viability of alternative situated learning environments for more effectively supporting the learning of this knowledge. To properly ground this study, a thorough investigation of related work in assessment, cognitive science, educational technology, and design education was completed, with connections and applications to civil engineering education highlighted. The experimental work of the thesis is organized into three parts: an assessment of civil engineering undergraduates' fundamental structural engineering knowledge and abilities; the development and testing of a software support environment for situated learning, the Civil Engineering Learning Library (CELL); and, the implementation and evaluation of the design studio, a pedagogical model for situated learning in the classroom. The results of the assessment study indicate that civil engineering seniors (and also students earlier in the curriculum) have difficulty retaining and applying basic knowledge of structural behavior, especially doing so in a flexible fashion in design situations. The survey also suggests that visualization plays an important role in understanding structural behavior. Tests with the CELL system show that a cognitively-flexible multimedia environment can support structural learning, but were inconclusive about whether the computer-based system helped the students to learn better than conventional classroom lecture. Two trial implementations of the design studio indicate that the studio model can serve as a powerful situated learning environment, and that it can be scaled up to reasonable class sizes. Significant requirements are associated with this model, however, primarily in faculty involvement, but also in physical resources and student time. In addition to these conclusions about the

  14. State Space identification of Civil Engineering Structures from Output Measurements

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning; Andersen, P.

    1997-01-01

    for identification of civil engineering structures. The SST is compared with the stochastic realization estimator Matrix Block Hankel (MBH) and a prediction error method (PEM). The results show that the investigated techniques give good results in terms of estimated modal parameters and mode shapes. Especially...

  15. State Space identification of Civil Engineering Structures from Output Measurements

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning; Andersen, P.

    for identification of civil engineering structures. The SST is compared with the stochastic realization estimator Matrix Block Hankel (MBH) and a prediction error method (PEM). The results show that the investigated techniques give good results in terms of estimated modal parameters and mode shapes. Especially...

  16. Parameter identification of civil engineering structures

    Science.gov (United States)

    Juang, J. N.; Sun, C. T.

    1980-01-01

    This paper concerns the development of an identification method required in determining structural parameter variations for systems subjected to an extended exposure to the environment. The concept of structural identifiability of a large scale structural system in the absence of damping is presented. Three criteria are established indicating that a large number of system parameters (the coefficient parameters of the differential equations) can be identified by a few actuators and sensors. An eight-bay-fifteen-story frame structure is used as example. A simple model is employed for analyzing the dynamic response of the frame structure.

  17. M.Sc. in Civil and Structural Engineering

    DEFF Research Database (Denmark)

    Clausen, Johan Christian

    The following pages contain a list of project ideas proposed by the scientific staff at the Department of Civil Engineering, Aalborg University, and a number of companies. Most of the project ideas in this catalogue may form the basis for long and short master projects as well as regular 3rd...... semester projects at the M.Sc. programme in Civil and Structural Engineering. Each project description provides a brief overview of the purpose as well as the main activities. Further, a weighting between theoretical analysis, experimental work and computer modelling has been proposed. Usually...... page. Furthermore, other ideas for projects may be discussed with a potential supervisor. Many private engineering companies have a homepage on which they state that they would like to collaborate with students on a master project....

  18. Estimating Modal Parameters of Civil Engineering Structures subject to Ambient and Harmonic Excitation

    DEFF Research Database (Denmark)

    Andersen, Palle; Brincker, Rune; Ventura, Carlos;

    In this paper addresses the problems of separating structural modes and harmonics arising from sinusoidal excitation. Though the problem is mostly know in mechanical engineering applications such as rotating machinery, some civil engineering applications experiences the same challenges. A robust...... and fast harmonic detection procedure is presented and illustrated on a civil engineering case....

  19. Identification of Civil Engineering Structures using Multivariate ARMAV and RARMAV Models

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning; Andersen, P.; Brincker, Rune

    This paper presents how to make system identification of civil engineering structures using multivariate auto-regressive moving-average vector (ARMAV) models. Further, the ARMAV technique is extended to a recursive technique (RARMAV). The ARMAV model is used to identify measured stationary data....... The results show the usefulness of the approaches for identification of civil engineering structures excited by natural excitation...

  20. Practical Applications of Semi-active Control Systems to Civil Engineering Structures

    OpenAIRE

    Florentina Chira; Cristian Pastia; Septimiu-George Luca

    2007-01-01

    During the last few years, it has been paid a considerable attention to the searching and developing of some procedures and mechanisms of structural control to mitigate the effects of dynamic environmental hazards on civil engineering structures. In this paper we review some full-scale applications of semi-active control systems for the protection of the civil structures under dynamic actions.

  1. Recent Applications of Some Active Control Systems to Civil Engineering Structures

    OpenAIRE

    Cristian Pastia; Septimiu-George Luca; Florentina Chira

    2007-01-01

    The application of control systems to civil engineering structures has been investigated in recent years to demonstrate the efficiency of these systems during exceptional natural events such as earthquakes and severe winds. In this paper, a review of some full-scale implementations of active and hybrid control systems for the protection of the civil structures to dynamic actions is performed.

  2. Identification of Civil Engineering Structures using Vector ARMA Models

    DEFF Research Database (Denmark)

    Andersen, Palle; Brincker, Rune; Kirkegaard, Poul Henning

    1998-01-01

    This paper describes the work which have been carried out in the project B.1: Damage Detection in Structures under Random Loading. The project is a part of the research programme Dynamics of Structures founded by the Danish Technical Research Council. The planned contents of and the requirements ...... Dept. of Building Technology and Structural Engineering, Aalborg University....

  3. Using discrete-event simulation to design reliable and cost-efficient civil engineering structures

    OpenAIRE

    Juan Pérez, Angel Alejandro; Ferrer Biosca, Alberto; Serrat Piè, Carles; Faulín, Javier; Hester, J; López Brosa, Pere

    2009-01-01

    In this paper the topic of Structural Reliability Analysis and its importance in modern Civil Engineering is introduced. Throughout the paper, some advantages that simulation-based approaches offer with respect to other classical approaches are discussed. After a review of the most relevant literature on the subject, a simulation-based approach is described. Our methodology makes use of discrete-event simulation techniques to help the civil engineer design more reli...

  4. Design of a System for Monitoring Reliability of Structures and Constructions in Civil Engineering

    Directory of Open Access Journals (Sweden)

    Tomislav S. Igić

    2011-07-01

    Full Text Available Monitoring of civil engineering structures and constructions requires techniques which can produce high precision and accuracy, reliable measurements and fast processing speed. The development of information and communication systems as well as of microprocessor controllers has enabled a creation of monitoring systems that can be used for tracking reliability of structures and constructions in civil engineering, with described key features. This paper describes in detail the architecture of the Civil Engineering Structures Reliability Monitoring (CERM system. The system has been designed for the purposes of the Technical Mechanics and Theory of Constructions Department at the Faculty of Civil Engineering and Architecture, University of Nis. Unlike general commercial monitoring systems, the CERM system has been specially designed for the purpose of reliability monitoring, and its potential will be further exploited in this paper. It is based on usage of universal microprocessor controllers Integraf of series 10X, along with specially designed software package. This system provides real time acquisition of measurements for observed civil engineering structures and analysis of received values based on developed mathematical models.

  5. Embedded optical fiber sensors for continuous health monitoring of civil engineering structures in composite materials

    OpenAIRE

    Chapeleau, Xavier; Drissi Habti, Monssef; Tomiyama, Tomonori

    2010-01-01

    Embedding optical fibre-based sensors into composite structures in civil engineering is a promising alternative for structural health monitoring (SHM). This article is a review of the main sensing techniques based on optical fibres. Localized and multiplexed measurements as well as distributed measurements techniques are presented.

  6. Vibration Based Damage Assessment of a Civil Engineering Structures using a Neural Networks

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning; Rytter, A.

    In this paper the possibility of using a Multilayer Perceptron (MLP) network trained with the Backpropagation Algorith as a non-destructive damage assessment technique to locate and quantify a damage in Civil Engineering structures is investigated. Since artificial neural networks are proving...

  7. Optimal Design of Experiments for Parametric Identification of Civil Engineering Structures

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning

    Optimal Systems of experiments for parametric identification of civil engineering structures is investigated. Design of experiments for parametric identification of dynamic systems is usually done by minimizing a scalar measure, e.g the determinant, the trace ect., of an estimated parameter...

  8. Identification of Time Varying Civil Engineering Structures using Multivariate Recursive Time Domain Models

    DEFF Research Database (Denmark)

    Andersen, P.; Skjærbæk, P. S.; Kirkegaard, Poul Henning

    with the smoothed quanties which have been obtained from SARCOF. The results show the usefulness of the technique for identification of a time varying civil engineering structure. It is found that all the techniques give reliable estiates of the frequencies of the two lowest modes and the first mode shape. Only...

  9. On the Uncertainty of Identification of Civil Engineering Structures Using ARMA Models

    DEFF Research Database (Denmark)

    Andersen, Palle; Brincker, Rune; Kirkegaard, Poul Henning

    1995-01-01

    In this paper the uncertainties of modal parameters estimated using ARMA models for identification of civil engineering structures are investigated. How to initialize the predictor part of a Gauss-Newton optimization algorithm is put in focus. A backward-forecasting procedure for initialization...

  10. On the Uncertainty of Identification of Civil Engineering Structures using ARMA Models

    DEFF Research Database (Denmark)

    Andersen, P.; Brincker, Rune; Kirkegaard, Poul Henning

    In this paper the uncertainties of modal parameters estimated using ARMA models for identification of civil engineering structures are investigated. How to initialize the predictor part of a Gauss-Newton optimization algorithm is put in focus. A backward-forecasting procedure for initialization...

  11. Use of Statistical Information for Damage Assessment of Civil Engineering Structures

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning; Andersen, P.

    This paper considers the problem of damage assessment of civil engineering structures using statistical information. The aim of the paper is to review how researchers recently have tried to solve the problem. It is pointed out that the problem consists of not only how to use the statistical...

  12. EVALUATION FOR JUDGMENT CRITERIA OF REPAIR ON CIVIL ENGINEERING STRUCTURE BY SUPPORT VECTOR MACHINE

    Science.gov (United States)

    Yuki, Kazunori; Kobayashi, Hiroki; Ohishi, Hiroyuki; Sugimoto, Hiroyuki; Iida, Takeshi; Furukawa, Kohei

    In this study, setting method for judgment criteria for repair of civil engineering structures is analyzed by the use of inspection and repair record of expansion joint of bridges with the Support Vector Machine. The Support Vector Machine is a technique used to apply for setting of risk degree of disasters on natural slopes. However it is needed that effective exclusion method of noise data has to be considered to apply for the analysis of the setting method. Therefore the noise data is excluded objectively in order that high confidence data can be extracted from the record. In this way setting the method can be developed. As a result of this study, it can be shown that the setting method by Support Vector Machine is effective as a tool for maintenance management plan of civil engineering structures since the method has a high integrity with evaluation by professional engineer.

  13. Strain properties analysis and wireless collection system of PVDF for structural local health monitoring of civil engineering structures

    Science.gov (United States)

    Yu, Yan; Wang, Yang; Dong, Weijie; Jin, Yajing; Ou, Jinping

    2009-07-01

    For large civil engineering structures and base establishments, for example, bridges, super-high buildings, long-span space structures, offshore platforms and pipe systems of water & gas supply, their lives are up to a few decades or centuries. Damaged by environmental loads, fatigue effects, corrosion effects and material aging, these structures experience inevitably such side effects as damage accumulation, resistance reduction and even accidents. The traditional civil structure is a kind of passive one, whose performance and status are unpredictable to a great extent, but the informatics' introduction breaks a new path to obtain the status of the structure, thus it is an important research direction to evaluate and improve reliability of civil structures by the use of monitoring and health diagnosis technique, and this also assures the security of service for civil engineering structures. Smart material structure, originated from the aerospace sector, has been a research hotspot in civil engineering, medicine, shipping, and so on. For structural health monitoring of civil engineering, the research about high-performance sensing unit of smart material structure is very important, and this will possibly push further the development and application of monitoring and health diagnosis techniques. At present, piezoelectric materials are one of the most widely used sensing materials among the research of smart material structures. As one of the piezoelectric materials, PVDF(Polyvinylidene Fluoride)film is widely considered for the advantages of low cost, good mechanical ability, high sensibility, the ability of being easily placed and resistance of corrosion. However, only a few studies exit about building a mature monitoring system using PVDF. In this paper, for the sake of using PVDF for sensing unit for structural local monitoring of civil engineering, the strain sensing properties of PVDF are studied in detail. Firstly, the operating mechanism of PVDF is analyzed

  14. History of Civil Engineering Modal Analysis

    DEFF Research Database (Denmark)

    Brincker, Rune

    2008-01-01

    techniques are available for civil engineering modal analysis. The testing of civil structures defers from the traditional modal testing in the sense, that very often it is difficult, or sometimes impossible, to artificially excite a large civil engineering structure. Also, many times, even though...

  15. M.Sc. in Civil and Structural Engineering:3rd Semester and Master’s Thesis Ideas 2014

    OpenAIRE

    2014-01-01

    The following pages contain a list of project ideas proposed by the scientific staff at the Department of Civil Engineering, Aalborg University, and a number of companies. Most of the project ideas in this catalogue may form the basis for long and short master projects as well as regular 3rd semester projects at the M.Sc. programme in Civil and Structural Engineering.

  16. M.Sc. in Civil and Structural Engineering:3rd Semester and Master’s Thesis Ideas 2011

    OpenAIRE

    2011-01-01

    This catalogue contains a list of project ideas proposed by the scientific staff at the Department of Civil Engineering, Aalborg University, and a number of companies. Most of the project ideas in this catalogue may form the basis for long and short candidate projects as well as regular 3rd semester projects at the M.Sc. programme in Civil and Structural Engineering.

  17. Job Prospects for Civil Engineers.

    Science.gov (United States)

    Basta, Nicholas

    1985-01-01

    Government programs and renewed industrial activity have combined with stable enrollments to create bright job prospects for civil engineers. Areas with good opportunities include highway reconstruction and rehabilitation, water-resource management, and new factory construction. The subspecialty of structural engineering has a growing need in…

  18. Standard Practice for Evaluating Material Property Characteristic Values for Polymeric Composites for Civil Engineering Structural Applications

    CERN Document Server

    American Society for Testing and Materials. Philadelphia

    2006-01-01

    1.1 This practice covers the procedures for computing characteristic values of material properties of polymeric composite materials intended for use in civil engineering structural applications. The characteristic value is a statistically-based material property representing the 80 % lower confidence bound on the 5th-percentile value of a specified population. Characteristic values determined using this standard practice can be used to calculate structural member resistance values in design codes for composite civil engineering structures and for establishing limits upon which qualification and acceptance criteria can be based. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

  19. Nanosensors for structural monitoring in civil engineering: New insight on promising carbon nanotubes devices

    OpenAIRE

    LEBENTAL, Bérengère; Norman, Evgeny; Gorintin, Louis; Renaux, Philippe; BONDAVALLI, Paulo; COJOCARU, Costel-Sorin; Ghis, Anne

    2011-01-01

    In recent years, requirements in terms of service-life of civil engineering structures have become more and more stringent, so that the focus of designers and owners is now set on structural durability. Foreseeing structural failures and repairing damaged structures at an early stage has become a major stake. This approach calls for an accurate knowledge of the state of the structure at any point in its lifetime. This is the incentive for the world-wide development of various in-situ monitori...

  20. Artificial Intelligence in Civil Engineering

    Directory of Open Access Journals (Sweden)

    Pengzhen Lu

    2012-01-01

    Full Text Available Artificial intelligence is a branch of computer science, involved in the research, design, and application of intelligent computer. Traditional methods for modeling and optimizing complex structure systems require huge amounts of computing resources, and artificial-intelligence-based solutions can often provide valuable alternatives for efficiently solving problems in the civil engineering. This paper summarizes recently developed methods and theories in the developing direction for applications of artificial intelligence in civil engineering, including evolutionary computation, neural networks, fuzzy systems, expert system, reasoning, classification, and learning, as well as others like chaos theory, cuckoo search, firefly algorithm, knowledge-based engineering, and simulated annealing. The main research trends are also pointed out in the end. The paper provides an overview of the advances of artificial intelligence applied in civil engineering.

  1. Low-coherence interferometry for the monitoring of civil engineering structures

    Science.gov (United States)

    Inaudi, Daniele; Elamari, Adil; Vurpillot, Samuel

    1994-09-01

    A measuring system adapted to the needs of civil engineering structural monitoring is presented. It is based on low coherence interferometry in standard singlemode fibers and has a resolution of 5 micrometers , an operational range of 7 cm, stability over long periods (at least 1 year) and insensitivity to variations of the fiber losses. The portable reading unit doesn't need to be connected to the sensing fibers permanently and can thus be used to monitor multiple structures reducing the costs of the instrumentation. This paper presents the operating principle of this system and different techniques used to install the sensing fibers in large concrete structures, timber and mixed timber-concrete structures as well as on metals.

  2. Image-based dynamic deformation monitoring of civil engineering structures from long ranges

    Science.gov (United States)

    Ehrhart, Matthias; Lienhart, Werner

    2015-02-01

    In this paper, we report on the vibration and displacement monitoring of civil engineering structures using a state of the art image assisted total station (IATS) and passive target markings. By utilizing the telescope camera of the total station, it is possible to capture video streams in real time with 10fps and an angular resolution of approximately 2″/px. Due to the high angular resolution resulting from the 30x optical magnification of the telescope, large distances to the object to be monitored are possible. The laser distance measurement unit integrated in the total station allows to precisely set the camera's focus position and to relate the angular quantities gained from image processing to units of length. To accurately measure the vibrations and displacements of civil engineering structures, we use circular target markings rigidly attached to the object. The computation of the targets' centers is performed by a least squares adjustment of an ellipse according to the Gauß-Helmert model from which the parameters of the ellipse and their standard deviations are derived. In laboratory experiments, we show that movements can be detected with an accuracy of better than 0.2mm for single frames and distances up to 30m. For static applications, where many video frames can be averaged, accuracies of better than 0.05mm are possible. In a field test on a life-size footbridge, we compare the vibrations measured by the IATS to reference values derived from accelerometer measurements.

  3. Operational modal analysis of civil engineering structures an introduction and guide for applications

    CERN Document Server

    Rainieri, Carlo

    2014-01-01

    This book covers all aspects of operational modal analysis for civil engineering, from theoretical background to applications, including measurement hardware, software development, and data processing. In particular, this book provides an extensive description and discussion of OMA methods, their classification and relationship, and advantages and drawbacks. The authors cover both the well-established theoretical background of OMA methods and the most recent developments in the field, providing detailed examples to help the reader better understand the concepts and potentialities of the technique. Additional material is provided (data, software) to help practitioners and students become familiar with OMA. Covering a range of different aspects of OMA, always with the application in mind, the practical perspective adopted in this book makes it ideal for a wide range of readers from researchers to field engineers; graduate and undergraduate students; and technicians interested in structural dynamics, system iden...

  4. B 150 civil engineering futures

    DEFF Research Database (Denmark)

    Foreword B150 –Civil Engineering Futures consists of interviews made, articles written, and projects presented in connection with the 150th anniversary celebrations of the study of civil engineering in Denmark. Instead of a historical retrospect, it was decided to look into the future. What...... challenges will the next 150 years bring civil engineers? Researchers and lecturers at DTU’s Department of Civil Engineering (known as DTU Byg) suggested possible events, and we also consulted civil engineers and their business partners in the building industry. In this way, a programme was put together...... theme in twentieth century architecture. Together, civil engineer Peter Rice and architect Ian Ritchie created a paradigm shift with their revolutionary ideas for glass facades supported by cables. Glued and bolted constructions made entirely of glass are now a reality in small-scale projects, yet...

  5. Environmental Ethics and Civil Engineering.

    Science.gov (United States)

    Vesilind, P. Aarne

    1987-01-01

    Traces the development of the civil engineering code of ethics. Points out that the code does have an enforceable provision that addresses the engineer's responsibility toward the environment. Suggests revisions to the code to accommodate the environmental impacts of civil engineering. (TW)

  6. Use of Time- and Frequency-Domain Approaches for Damage Detection in Civil Engineering Structures

    Directory of Open Access Journals (Sweden)

    V. H. Nguyen

    2014-01-01

    Full Text Available The aim of this paper is to apply both time- and frequency-domain-based approaches on real-life civil engineering structures and to assess their capability for damage detection. The methodology is based on Principal Component Analysis of the Hankel matrix built from output-only measurements and of Frequency Response Functions. Damage detection is performed using the concept of subspace angles between a current (possibly damaged state and a reference (undamaged state. The first structure is the Champangshiehl Bridge located in Luxembourg. Several damage levels were intentionally created by cutting a growing number of prestressed tendons and vibration data were acquired by the University of Luxembourg for each damaged state. The second example consists in reinforced and prestressed concrete panels. Successive damages were introduced in the panels by loading heavy weights and by cutting steel wires. The illustrations show different consequences in damage identification by the considered techniques.

  7. Civil Engineering Technology Needs Assessment.

    Science.gov (United States)

    Oakland Community Coll., Farmington, MI. Office of Institutional Planning and Analysis.

    In 1991, a study was conducted by Oakland Community College (OCC) to evaluate the need for a proposed Civil Engineering Technology program. An initial examination of the literature focused on industry needs and the job market for civil engineering technicians. In order to gather information on local area employers' hiring practices and needs, a…

  8. Civil engineering experiences in Portugal

    OpenAIRE

    Aguiar, J. L. Barroso de

    2009-01-01

    The good cooperation established between Universities, Laboratory National of Civil Engineering and private companies made possible the execution of a considerable number of civil engineering works by Portugueses, inside and outside the country. Some good examples are presented in this paper.

  9. Proceedings of the Department of Civil and Structural Engineering, University of Sheffield – The Annual Postgraduate Research Student Conference 2015

    OpenAIRE

    aa, vv

    2015-01-01

    The ten papers which appear in this proceedings were contributed by current research students studying in the Department of Civil & Structural Engineering at the University of Sheffield. The papers which have been included provide a flavour of the breadth of the research currently being undertaken in the Department. The Department has a long history of undertaking research in the field of structural engineering and mechanics, and the area is represented in the proceedings by five papers. Two ...

  10. Knowledge, attitude and practices for design for safety: A study on civil & structural engineers.

    Science.gov (United States)

    Goh, Yang Miang; Chua, Sijie

    2016-08-01

    Design for safety (DfS) (also known as prevention through design, safe design and Construction (Design and Management)) promotes early consideration of safety and health hazards during the design phase of a construction project. With early intervention, hazards can be more effectively eliminated or controlled leading to safer worksites and construction processes. DfS is practiced in many countries, including Australia, the UK, and Singapore. In Singapore, the Manpower Ministry enacted the DfS Regulations in July 2015, which will be enforced from August 2016 onwards. Due to the critical role of civil and structural (C&S) engineers during design and construction, the DfS knowledge, attitude and practices (KAP) of C&S engineers have significant impact on the successful implementation of DfS. Thus, this study aims to explore the DfS KAP of C&S engineers so as to guide further research in measuring and improving DfS KAP of designers. During the study, it was found that there is a lack of KAP studies in construction management. Therefore, this study also aims to provide useful lessons for future applications of the KAP framework in construction management research. A questionnaire was developed to assess the DfS KAP of C&S engineers. The responses provided by 43 C&S engineers were analyzed. In addition, interviews with experienced construction professionals were carried out to further understand perceptions of DfS and related issues. The results suggest that C&S engineers are supportive of DfS, but the level of DfS knowledge and practices need to be improved. More DfS guidelines and training should be made available to the engineers. To ensure that DfS can be implemented successfully, there is a need to study the contractual arrangements between clients and designers and the effectiveness of different implementation approaches for the DfS process. The questionnaire and findings in this study provided the foundation for a baseline survey with larger sample size, which is

  11. Knowledge, attitude and practices for design for safety: A study on civil & structural engineers.

    Science.gov (United States)

    Goh, Yang Miang; Chua, Sijie

    2016-08-01

    Design for safety (DfS) (also known as prevention through design, safe design and Construction (Design and Management)) promotes early consideration of safety and health hazards during the design phase of a construction project. With early intervention, hazards can be more effectively eliminated or controlled leading to safer worksites and construction processes. DfS is practiced in many countries, including Australia, the UK, and Singapore. In Singapore, the Manpower Ministry enacted the DfS Regulations in July 2015, which will be enforced from August 2016 onwards. Due to the critical role of civil and structural (C&S) engineers during design and construction, the DfS knowledge, attitude and practices (KAP) of C&S engineers have significant impact on the successful implementation of DfS. Thus, this study aims to explore the DfS KAP of C&S engineers so as to guide further research in measuring and improving DfS KAP of designers. During the study, it was found that there is a lack of KAP studies in construction management. Therefore, this study also aims to provide useful lessons for future applications of the KAP framework in construction management research. A questionnaire was developed to assess the DfS KAP of C&S engineers. The responses provided by 43 C&S engineers were analyzed. In addition, interviews with experienced construction professionals were carried out to further understand perceptions of DfS and related issues. The results suggest that C&S engineers are supportive of DfS, but the level of DfS knowledge and practices need to be improved. More DfS guidelines and training should be made available to the engineers. To ensure that DfS can be implemented successfully, there is a need to study the contractual arrangements between clients and designers and the effectiveness of different implementation approaches for the DfS process. The questionnaire and findings in this study provided the foundation for a baseline survey with larger sample size, which is

  12. Teaching Mathematics to Civil Engineers

    Science.gov (United States)

    Sharp, J. J.; Moore, E.

    1977-01-01

    This paper outlines a technique for teaching a rigorous course in calculus and differential equations which stresses applicability of the mathematics to problems in civil engineering. The method involves integration of subject matter and team teaching. (SD)

  13. Space civil engineering - A new discipline

    Science.gov (United States)

    Sadeh, Willy Z.; Criswell, Marvin E.

    1991-01-01

    Space Civil Engineering is an emerging engineering discipline that focuses on extending and expanding the Civil Engineering know-how and practice to the development and maintenance of infrastructure on celestial bodies. Space Civil Engineering is presently being developed as a new discipline within the Department of Civil Engineering at Colorado State University under a recently established NASA Space Grant College Program. Academic programs geared toward creating Space Civil Engineering Options at both undergraduate and graduate levels are being formulated. Basic ideas and concepts of the curriculum in the Space Civil Engineering Option at both undergraduate and graduate levels are presented. The role of Space Civil Engineering in the Space Program is discussed.

  14. Image restoration for civil engineering structure monitoring using imaging system embedded on UAV

    Science.gov (United States)

    Vozel, Benoit; Dumoulin, Jean; Chehdi, Kacem

    2013-04-01

    Nowadays, civil engineering structures are periodically surveyed by qualified technicians (i.e. alpinist) operating visual inspection using heavy mechanical pods. This method is far to be safe, not only for civil engineering structures monitoring staff, but also for users. Due to the unceasing traffic increase, making diversions or closing lanes on bridge becomes more and more difficult. New inspection methods have to be found. One of the most promising technique is to develop inspection method using images acquired by a dedicated monitoring system operating around the civil engineering structures, without disturbing the traffic. In that context, the use of images acquired with an UAV, which fly around the structures is of particular interest. The UAV can be equipped with different vision system (digital camera, infrared sensor, video, etc.). Nonetheless, detection of small distresses on images (like cracks of 1 mm or less) depends on image quality, which is sensitive to internal parameters of the UAV (vibration modes, video exposure times, etc.) and to external parameters (turbulence, bad illumination of the scene, etc.). Though progresses were made at UAV level and at sensor level (i.e. optics), image deterioration is still an open problem. These deteriorations are mainly represented by motion blur that can be coupled with out-of-focus blur and observation noise on acquired images. In practice, deteriorations are unknown if no a priori information is available or dedicated additional instrumentation is set-up at UAV level. Image restoration processing is therefore required. This is a difficult problem [1-3] which has been intensively studied over last decades [4-12]. Image restoration can be addressed by following a blind approach or a myopic one. In both cases, it includes two processing steps that can be implemented in sequential or alternate mode. The first step carries out the identification of the blur impulse response and the second one makes use of this

  15. Communication Needs of Thai Civil Engineering Students

    Science.gov (United States)

    Kaewpet, Chamnong

    2009-01-01

    This article reports on an examination of the communication needs of a group of Thai civil engineering students. Twenty-five stakeholders helped identify the communication needs of the students by participating in individual interviews. These included employers, civil engineers, civil engineering lecturers, ex-civil engineering students of the…

  16. Ecological Engineering and Civil Engineering works

    OpenAIRE

    Van Bohemen, H.D.

    2004-01-01

    This thesis provides a survey of the research results of the relationship between on the one hand the construction, management and maintenance of civil engineering works, and on the other hand the environment, nature and landscape, with the main focus on motorways and coastal protection. The growing number and increase in size of civil engineering works and the growing need for protection measures of the sandy coasts have led to an ever increasing risk of adverse effects on the nature and lan...

  17. Space Civil Engineering option - A progress report

    Science.gov (United States)

    Criswell, Marvin E.; Sadeh, Willy Z.

    1992-01-01

    Space Civil Engineering is an emerging engineering discipline that focuses on extending and expanding Civil Engineering to the development, operation, and maintenance of infrastructures on celestial bodies. Space Civil Engineering is presently being developed as a new discipline within the Department of Civil Engineering at Colorado State University and with support of the NASA Space Grant College Program. Academic programs geared toward creating Space Civil Engineering Options at both undergraduate and graduate levels are being formulated. Basic ideas and concepts and the current status of the curriculum in the Space Civil Engineering Option primarily at the undergraduate level are presented.

  18. TECHNICAL SOLUTIONS TO CREATE ESTHETICAL CIVIL ENGINEERING STRUCTURES USING THE GEOSYNTHETICS MATERIALS

    Directory of Open Access Journals (Sweden)

    Teodor Eugen Man

    2010-01-01

    Full Text Available Geosynthetics is the term used to describe a range of generally polymeric products used to solve some civil engineeringproblems. The term is generally regarded to encompass eight main product categories: geotextiles, geogrids, geonets,geomembranes, geosynthetic clay liners, geofoam, geocells (cellular confinement and geocomposites. The syntheticpolymeric nature of these products makes them suitable for use in the ground where high levels of durability arerequired. Not only because, properly formulated, they can also be used in exposed applications. Geosynthetics areavailable in a wide range of forms and materials, each to suit a slightly different end use. These products have a widerange of applications and are currently used in many civil, geotechnical, transportation, geoenvironmental, hydraulic,and private development applications including roads, airfields, railroads, embankments, retaining structures,reservoirs, canals, dams, erosion control, sediment control, landfill liners, landfill covers, mining, aquaculture andagriculture. The paper presents basic aspects of geotextiles, drainage, geocomposite designissues and technicalsolutions of their use.

  19. STRATEGY FOR IMPROVEMENT OF SAFETY AND EFFICIENCY OF COMPUTER-AIDED DESIGN ANALYSIS OF CIVIL ENGINEERING STRUCTURES ON THE BASIS OF THE SYSTEM APPROACH

    OpenAIRE

    Zaikin Vladimir Genrikhovich; Valuyskikh Viktor Petrovich

    2012-01-01

    The authors highlight three problems of the age of information technologies and proposes the strategy for their resolution in relation to the computer-aided design of civil engineering structures. The authors express their concerns in respect of globalization of software programmes designated for the analysis of civil engineering structures and employed outside of Russia. The problem of the poor quality of the input data has reached Russia. Lately, the rate of accidents of buildings and s...

  20. Vibration-based localisation of structural deterioration in frame-like civil engineering structures

    DEFF Research Database (Denmark)

    Ulriksen, Martin Dalgaard; Damkilde, Lars

    2016-01-01

    , these vibrations can potentially lead to an evident risk of structural deterioration. In order to ensure the safety of the structures, it is thus paramount that the potential structural deterioration can be identified before it becomes critical from a structural integrity point of view. One way of facilitating...... such identification is by use of structural health monitoring (SHM) techniques, which enable remote, typically through pre-installed sensors, diagnosing of the structural health. In the present paper, it is examined whether a vibration-based SHM approach proposed by the authors—and previously applied successfully...

  1. Smart Sensing Technologies for Structural Health Monitoring of Civil Engineering Structures

    OpenAIRE

    M. Sun; W.J. Staszewski; Swamy, R. N.

    2010-01-01

    Structural Health Monitoring (SHM) aims to develop automated systems for the continuous monitoring, inspection, and damage detection of structures with minimum labour involvement. The first step to set up a SHM system is to incorporate a level of structural sensing capability that is reliable and possesses long term stability. Smart sensing technologies including the applications of fibre optic sensors, piezoelectric sensors, magnetostrictive sensors and self-diagnosing fibre reinforced compo...

  2. Geometric procedures for civil engineers

    CERN Document Server

    Tonias, Elias C

    2016-01-01

    This book provides a multitude of geometric constructions usually encountered in civil engineering and surveying practice.  A detailed geometric solution is provided to each construction as well as a step-by-step set of programming instructions for incorporation into a computing system. The volume is comprised of 12 chapters and appendices that may be grouped in three major parts: the first is intended for those who love geometry for its own sake and its evolution through the ages, in general, and, more specifically, with the introduction of the computer. The second section addresses geometric features used in the book and provides support procedures used by the constructions presented. The remaining chapters and the appendices contain the various constructions. The volume is ideal for engineering practitioners in civil and construction engineering and allied areas.

  3. Characterization of material for civil engineering

    OpenAIRE

    Cappelletto, Elisa

    2014-01-01

    Materials are the heart of engineering, which can be defined as the creative and rational use of materials for practical purposes. Materials have had an essential role in the development of civil engineering: from the beginning of human evolution, man has used many different materials to build houses, bridges, roads and countless other structures to make his life easier. Ancient populations used the raw materials at their disposal, such as stone, clay and timber. Over the centuries, the searc...

  4. Ecological Engineering and Civil Engineering works

    NARCIS (Netherlands)

    Van Bohemen, H.D.

    2004-01-01

    This thesis provides a survey of the research results of the relationship between on the one hand the construction, management and maintenance of civil engineering works, and on the other hand the environment, nature and landscape, with the main focus on motorways and coastal protection. The growing

  5. Civil Servants’ Salary Structure

    OpenAIRE

    Bilquees, Faiz

    2006-01-01

    The paper looks at the trends in nominal and real salaries of the Federal Government employees over the period 1990-2006. It examines the structural defects in the existing salary structure and the anomalies in the allowances structure to show that appropriate remuneration for the civil servants requires serious and urgent consideration. The widening gap in the emoluments of government employees versus the public sector corporations and private sector employees has a strong bearing on the mot...

  6. Active interaction control for civil structures

    OpenAIRE

    Wang, Luo-Jia

    1997-01-01

    This thesis presents a civil engineering approach to active control for civil structures. The proposed control technique, termed Active Interaction Control (AIC), utilizes dynamic interactions between different structures, or components of the same structure, to reduce the resonance response of the controlled or primary structure under earthquake excitations. The primary control objective of AIC is to minimize the maximum story drift of the primary structure. This is accomplished by timing th...

  7. ATLAS Civil Engineering Point 1

    CERN Multimedia

    Jean-Claude Vialis

    1998-01-01

    Different phases of realisation to Point 1 : zone of the ATLAS experiment After watching this film you can get the view of the civil engineering work at POINT1 where the ATLAS will be built. 03-11-1998 The video starts with the view of the POINT1 taken from the roof of the building 33. 04-11-1998 View of the installation of the entrance of the SDX1 18/19-11-1998 Installation of the rafters to the building PX15

  8. Civil Engineering: Improving the Quality of Life.

    Science.gov (United States)

    One Feather, Sandra

    2002-01-01

    American Indian civil engineers describe the educational paths that led them to their engineering careers, applications of civil engineering in reservation communities, necessary job skills, opportunities afforded by internship programs, continuing education, and the importance of early preparation in math and science. Addresses of 12 resource Web…

  9. Educating Civil Engineers for Developing Countries

    Science.gov (United States)

    Stanley, D.

    1974-01-01

    Based on engineering teaching experience in Africa and Asia, ideas are presented on educating civil engineers for developing countries, especially those in Africa. Some of the problems facing educational planners, teachers, and students are addressed, including responsibilities of a newly graduated civil engineer, curriculum development, and…

  10. ATLAS Civil Engineering Point 1

    CERN Multimedia

    Jean-Claude Vialis

    1999-01-01

    ATLAS Civil Engineering - Point 1 In the film you can see various stages of construction in Point 1: that is the experiment zone for ATLAS experimentation. One part of the video is filmed on the surface of Point 1. Therefore you can get the view of the hall SX 1 and the cranes. Cranes are located close to the ridge of the hall roof. The film gives you the view of the hall that covers the caps and the wells to underground cavern where the experiment will be implemented. The machinery for excavation lifts and cranes as well as the stock areas can also be seen. There are iron mounting and concrete works too

  11. ISIS Technologies for Smart Civil Engineering Infrastructure

    Institute of Scientific and Technical Information of China (English)

    Aftab A. Mufti; Kenneth W. Neale

    2004-01-01

    For more than a century, important civil engineering structures such as bridges, high-rise buildings, dams and marine platforms have contained iron or steel as the reinforcement for concrete or wood (ISIS Canada Strategic Plan, 2000). The useful lives of such structures have often been severely limited by the corrosion of this ferrous component. Much thought has been given in recent years to constructing structures that are lighter, stronger and non-corrosive. These innovative structures are new and for these to be accepted by the engineering community monitoring is mandatory. ISIS Canada has been developing such structures and monitoring them. In this paper, innovative bridge decks that have been implemented is described.

  12. Applied statistics for civil and environmental engineers

    CERN Document Server

    Kottegoda, N T

    2009-01-01

    Civil and environmental engineers need an understanding of mathematical statistics and probability theory to deal with the variability that affects engineers'' structures, soil pressures, river flows and the like. Students, too, need to get to grips with these rather difficult concepts.This book, written by engineers for engineers, tackles the subject in a clear, up-to-date manner using a process-orientated approach. It introduces the subjects of mathematical statistics and probability theory, and then addresses model estimation and testing, regression and multivariate methods, analysis of extreme events, simulation techniques, risk and reliability, and economic decision making.325 examples and case studies from European and American practice are included and each chapter features realistic problems to be solved.For the second edition new sections have been added on Monte Carlo Markov chain modeling with details of practical Gibbs sampling, sensitivity analysis and aleatory and epistemic uncertainties, and co...

  13. Analyzing uncertainty in civil engineering

    CERN Document Server

    Fellin, Wolfgang; Oberguggenberger, Michael; Vieider, Robert

    2005-01-01

    This volumeaddressestheissueofuncertaintyincivilengineeringfromdesign toconstruction. Failures do occur in practice. Attributing them to a residual risk or a faulty execution of the projectdoesnotproperlycover the range of causes. A closer scrutiny of the design, the engineering model, the data, the soil-structure-interactionand the model assumptions is required. Usually, the uncertaintiesininitialandboundaryconditionsaswellasmaterialparameters are abundant. Current engineering practice often leaves these issues aside, despite the factthatnewscienti?c tools have been developed in the past deca

  14. STRATEGY FOR IMPROVEMENT OF SAFETY AND EFFICIENCY OF COMPUTER-AIDED DESIGN ANALYSIS OF CIVIL ENGINEERING STRUCTURES ON THE BASIS OF THE SYSTEM APPROACH

    Directory of Open Access Journals (Sweden)

    Zaikin Vladimir Genrikhovich

    2012-12-01

    Full Text Available The authors highlight three problems of the age of information technologies and proposes the strategy for their resolution in relation to the computer-aided design of civil engineering structures. The authors express their concerns in respect of globalization of software programmes designated for the analysis of civil engineering structures and employed outside of Russia. The problem of the poor quality of the input data has reached Russia. Lately, the rate of accidents of buildings and structures has been growing not only in Russia. Control over efficiency of design projects is hardly performed. This attitude should be changed. Development and introduction of CAD along with the application the efficient methods of projection of behaviour of building structures are in demand. Computer-aided calculations have the function of a logical nucleus, and they need proper control. The system approach to computer-aided calculations and technologies designated for the projection of accidents is formulated by the authors. Two tasks of the system approach and fundamentals of the strategy for its implementation are formulated. The study of cases of negative results of computer-aided design of engineering structures was performed and multi-component design patterns were developed. Conclusions concerning the results of researches aimed at regular and wide-scale implementation of the strategy fundamentals are formulated. Organizational and innovative actions concerning the projected behaviour of civil engineering structures proposed in the strategy are to facilitate: safety and reliability improvement of buildings and structures; saving of building materials and resources; improvement of labour efficiency of designers; modernization and improvement of accuracy of projected behaviour of buildings and building standards; closer ties between civil and building engineering researchers and construction companies; development of competitive environment to boost

  15. Competencies Framework for Civil Engineer in Thailand

    Directory of Open Access Journals (Sweden)

    Phanudej Kudngaongarm

    2012-02-01

    Full Text Available The civil engineering industry now faces with many problems such as poorly planned projects, breach of the delivery date, erroneous budget estimation, uncontrolled system functionality changes, and inappropriate documentation that all lead to the dissatisfaction of clients. One of the main concerns of civil engineering industry is to develop the talent of its human resources, since the quality and innovation of its products and services depend to a great extent on the knowledge, the ability and the talent that civil engineers apply in the development process. A competency framework defines a set of knowledge, skills, and behaviors that professionals must have to excel in their careers. A competency framework facilitates the identification of training needs and guides the design of a professional development program. In this paper we propose a competency framework for civil engineers, whose design is based on the activities and interactions that they perform during the civil development process. Thus, competency framework for civil engineers defines a set of knowledge, abilities and key behaviors, with special emphasis in the soft skills. The organization that adopts this framework must define and integrate the specific competencies needed by for civil engineers to allow them to fulfill their goals.

  16. Review for dynamic researches in civil engineering in recent years

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Structure dynamic research is a hot field in civil engineering.It involves in many challenge topics,such as dynamic analysis and tests under earthquake,wind or other dynamic excitations.This paper introduces main dynamic researches in civil engineering in recent years,which will be classified into five aspects,especially for researches published in Science in China Series E:Technological Sciences.

  17. Mechanical Modelling and Computational Issues in Civil Engineering

    OpenAIRE

    FREMOND, M; MACERI, F

    2005-01-01

    In this edited book various novel approaches to problems of modern civil engineering are demonstrated. Experts associated within the Lagrange Laboratory present recent research results in civil engineering dealing both with modelling and computational aspects. Many modern topics are covered, such as monumental dams, soil mechanics and geotechnics, granular media, contact and friction problems, damage and fracture, new structural materials, and vibration damping -presenting the state of the ar...

  18. Risk Analysis in Civil Engineering

    DEFF Research Database (Denmark)

    Thoft-Christensen, Palle

    Until fairly recently there has been a tendency for structural engineering to be dominated by deterministic thinking, characterised in design calculations by the use of specified minimum material properties, specified load intensities and by prescribed procedures for computing stresses...... of strength are generally not known, In contrast in the field of hydraulic systems, much more is known about the actual performance of, say, pipe networks, weirs, spillways, ect., as their performance in service can be relatively easily observed or determined....

  19. Filtering out Environmental Effects in Damage Detection of Civil Engineering Structures

    DEFF Research Database (Denmark)

    Andersen, P.; Kirkegaard, Poul Henning; Brincker, Rune

    This paper concerns the problems of using eigenfrequencies, estimated from sampled data, of a structural system exposed to fluctuating ambient conditions. In this paper it is the effects of a fluctuating ambient temperature that is of primary concern. A regression model, for elimination of the in...

  20. System Identification of Civil Engineering Structures using State Space and ARMAV Models

    DEFF Research Database (Denmark)

    Andersen, P.; Kirkegaard, Poul Henning; Brincker, Rune

    In this paper the relations between an ambient excited structural system, represented by an innovation state space system, and the Auto-Regressive Moving Average Vector (ARMAV) model are considered. It is shown how to obtain a multivariate estimate of the ARMAV model from output measurements, usi...

  1. Filtering out Environmental Effects in Damage Detection of Civil Engineering Structures

    DEFF Research Database (Denmark)

    Andersen, P.; Kirkegaard, Poul Henning; Brincker, Rune

    1997-01-01

    This paper concerns the problems of using eigenfrequencies, estimated from sampled data, of a structural system exposed to fluctuating ambient conditions. In this paper it is the effects of a fluctuating ambient temperature that is of primary concern. A regression model, for elimination of the in...

  2. Active IR-applications in civil engineering

    Science.gov (United States)

    Wiggenhauser, H.

    2002-06-01

    Applications of IR-thermography in civil engineering are not limited to the identification of heat losses in building envelopes. As it is well known from other areas of non-destructive testing, active IR-thermographic methods such as cooling down or lock-in thermography improves the results in many investigations. In civil engineering these techniques have not been used widely. Mostly thermography is used in a quasi-static manner. The interpretation of moisture measurements with thermography on surfaces can be very difficult due to several overlapping effects: emissivity changes due to composition, heat transfer through wet sections of the specimen, cooling through air flow or reflected spurious radiation sources. These effects can be reduced by selectively measuring the reflection in two wavelength windows, one on an absorption band of water and another in a reference band and then combining the results in a moisture index image. Cooling down thermography can be used to identify subsurface structural deficiencies. For building materials like concrete these measurements are performed on a much longer time scale than in flash lamp experiments. A quantitative analysis of the full cooling down process over several minutes can reliably identify defects at different depths. Experiments at BAM have shown, that active thermography is capabale of identifying structural deficiencies or moist areas in building materials much more reliable than quasi-static thermography.

  3. Dynamic investigations of various civil engineering structures due to ambient and mining tremors

    Directory of Open Access Journals (Sweden)

    Kuzniar Krystyna

    2015-01-01

    Full Text Available The first part of the study deals with evaluation of dynamic characteristics of selected typical industrial facilities, such as the extraction steel tower, reinforced concrete tower skips. These structures are located in the coal mine area. The constructions of the test items are varied and complicated, which causes difficulties in the research in situ. In the investigation we used normal and emergency operation of lifting equipment, the effect of wind gusts and rhythmic man swaying. The second part of the study involves the determination of the dynamic characteristics of tailing dam. In this case mining tremors were used as the sources of vibration excitations. By using natural vibration excitation source it was possible to determine the lowest frequency of free vibration of the tailing dam. The third part of the paper focuses on the results of measurements of mine-induced ground vibrations and vibrations of residential buildings of various types. Typical one-family masonry houses as well as 5 and 12 storey reinforced prefabricated buildings were examined. The studies were conducted to determine the transmission of free-field vibrations to the building foundations. According to the significant differences between the simultaneously measured ground and building foundation vibrations, results of experimental tests obtained by means of response spectra are essential for the proper adoption of kinematic loads for dynamic models of these structures. The results of experimental studies were the basis for the verification of dynamic models of investigated structures.

  4. Competencies Framework for Civil Engineer in Thailand

    OpenAIRE

    Phanudej Kudngaongarm; Chuchai Sujivorakul

    2012-01-01

    The civil engineering industry now faces with many problems such as poorly planned projects, breach of the delivery date, erroneous budget estimation, uncontrolled system functionality changes, and inappropriate documentation that all lead to the dissatisfaction of clients. One of the main concerns of civil engineering industry is to develop the talent of its human resources, since the quality and innovation of its products and services depend to a great extent on the knowledge, the ability a...

  5. Biocalcification using B. pasteurii for strengthening brick masonry civil engineering structures.

    Science.gov (United States)

    Raut, Supriya H; Sarode, D D; Lele, S S

    2014-01-01

    Microbiologically induced calcite precipitation in bricks by bacterium Bacillus pasteurii (NCIM 2477) using a media especially optimized for urease production (OptU) was demonstrated in this study. Effect of biocalcification activity on compressive strength and water absorption capacity of bricks was investigated. Various other parameters such as pH, growth profile, urease activity, urea breakdown and calcite precipitated were monitored during the 28 days curing period. Efficiency of B. pasteurii to form microbial aided calcite precipitate in OptU media resulted into 83.9% increase in strength of the bricks as compared to only 24.9% with standard media, nutrient broth (NB). In addition to significant increase in the compressive strength, bricks treated with B. pasteurii grown in OptU media resulted in 48.9 % reduction in water absorption capacity as compared to control bricks immersed in tap water. Thus it was successfully demonstrated that microbial calcification in optimized media by Bacillus pasteurii has good potential for commercial application to improve the life span of structures constructed with bricks, particularly structures of heritage importance.

  6. Application of ARMAV models to the identification and damage detection of mechanical and civil engineering structures

    Science.gov (United States)

    Bodeux, J. B.; Golinval, J. C.

    2001-06-01

    In this paper, the application of auto-regressive moving average vector models to system identification and damage detection is investigated. These parametric models have already been applied for the analysis of multiple input-output systems under ambient excitation. Their main advantage consists in the capability of extracting modal parameters from the recorded time signals, without the requirement of excitation measurement. The excitation is supposed to be a stationary Gaussian white noise. The method also allows the estimation of modal parameter uncertainties. On the basis of these uncertainties, a statistically based damage detection scheme is performed and it becomes possible to assess whether changes of modal parameters are caused by, e.g. some damage or simply by estimation inaccuracies. The paper reports first an example of identification and damage detection applied to a simulated system under random excitation. The `Steel-Quake' benchmark proposed in the framework of COST Action F3 `Structural Dynamics' is also analysed. This structure was defined by the Joint Research Centre in Ispra (Italy) to test steel building performance during earthquakes. The proposed method gives an excellent identification of frequencies and mode shapes, while damping ratios are estimated with less accuracy.

  7. Civil engineering applications of ground penetrating radar

    CERN Document Server

    Pajewski, Lara

    2015-01-01

    This book, based on Transport and Urban Development COST Action TU1208, presents the most advanced applications of ground penetrating radar (GPR) in a civil engineering context, with documentation of instrumentation, methods, and results. It explains clearly how GPR can be employed for the surveying of critical transport infrastructure, such as roads, pavements, bridges, and tunnels, and for the sensing and mapping of underground utilities and voids. Detailed attention is also devoted to use of GPR in the inspection of geological structures and of construction materials and structures, including reinforced concrete, steel reinforcing bars, and pre/post-tensioned stressing ducts. Advanced methods for solution of electromagnetic scattering problems and new data processing techniques are also presented. Readers will come to appreciate that GPR is a safe, advanced, nondestructive, and noninvasive imaging technique that can be effectively used for the inspection of composite structures and the performance of diagn...

  8. The frequency-dependent elements in the code SASSI: A bridge between civil engineers and the soil-structure interaction specialists

    Energy Technology Data Exchange (ETDEWEB)

    Tyapin, Alexander [Atomenergoproject, 7/1 Bakuninskaya Str., Moscow 105005 (Russian Federation)]. E-mail: Atyapin@bvcp.ru

    2007-07-15

    After four decades of the intensive studies of the soil-structure interaction (SSI) effects in the field of the NPP seismic analysis there is a certain gap between the SSI specialists and civil engineers. The results obtained using the advanced SSI codes like SASSI are often rather far from the results obtained using general codes (though match the experimental and field data). The reasons for the discrepancies are not clear because none of the parties can recall the results of the 'other party' and investigate the influence of various factors causing the difference step by step. As a result, civil engineers neither feel the SSI effects, nor control them. The author believes that the SSI specialists should do the first step forward (a) recalling 'viscous' damping in the structures versus the 'material' one and (b) convoluting all the SSI wave effects into the format of 'soil springs and dashpots', more or less clear for civil engineers. The tool for both tasks could be a special finite element with frequency-dependent stiffness developed by the author for the code SASSI. This element can represent both soil and structure in the SSI model and help to split various factors influencing seismic response. In the paper the theory and some practical issues concerning the new element are presented.

  9. Opportunities in Civil Engineering. [VGM Career Horizons Series].

    Science.gov (United States)

    Hagerty, D. Joseph; Heer, John E., Jr.

    This book presents information on career opportunities in civil engineering. Chapter 1 focuses on the scope of civil engineering, discussing: role of scientist, engineer, and technologists; engineering and engineering technology; civil engineer's role and obligations; and other information. Chapter 2 considers such aspects of the education for…

  10. Civil Engineering in Primary Schools

    Science.gov (United States)

    Brown, Martin; Strong, Alan

    2010-01-01

    For many children of primary school age, an engineer is the man who comes to service the central heating system or who fixes the family car when it breaks down. Most have never met a "real" professional engineer, and have no idea of what is involved in the exciting world of engineering. Most assume that engineers are men. To try to remove these…

  11. Materials for construction and civil engineering science, processing, and design

    CERN Document Server

    Margarido, Fernanda

    2015-01-01

    This expansive volume presents the essential topics related to construction materials composition and their practical application in structures and civil installations. The book's diverse slate of expert authors assemble invaluable case examples and performance data on the most important groups of materials used in construction, highlighting aspects such as nomenclature, the properties, the manufacturing processes, the selection criteria, the products/applications, the life cycle and recyclability, and the normalization. Civil Engineering Materials: Science, Processing, and Design is ideal for practicing architects; civil, construction, and structural engineers, and serves as a comprehensive reference for students of these disciplines. This book also: ·       Provides a substantial and detailed overview of traditional materials used in structures and civil infrastructure ·       Discusses properties of natural and synthetic materials in construction and materials' manufacturing processes ·  �...

  12. Retraining the Modern Civil Engineer.

    Science.gov (United States)

    Priscoli, Jerome Delli

    1983-01-01

    Discusses why modern engineering requires social science and the nature of planning. After these conceptional discussions, 12 practical tools which social science brings to engineering are reviewed. A tested approach to training engineers in these tools is then described. Tools include institutional analysis, policy profiling, and other impact…

  13. Consolidation on civil engineering and technical infrastructure

    CERN Document Server

    Alves, P; Pepinster, P; van Baaren, W; CERN. Geneva. ST Division

    2003-01-01

    The use and age of the civil engineering structure (office buildings, halls, tunnels) and of tertiary technical equipment (mainly HVAC and electricity) at CERN is such that their renovation must be considered in the near future. Due to the large number of buildings and equipment in these conditions, and the restricted budget available it is extremely important to define priorities. The aim of this paper is to give an overview of the current conditions and the related problems, based on data analysis of CERN database and confronting it with the inventory made at CERN by an external company. After having identified the most frequent problems and repairs to carry out, a planning for intervention is therefore presented optimizing the safety aspects, maintenance costs and comfort for the users. The timescale of this intervention is related to the money that will be available in the coming years.

  14. CIVIL ENGINEERS' ROLES IN PUBLIC WORKS

    Science.gov (United States)

    Murata, Teruaki

    Recently, the public interests are becoming high in the way of executing public works and the future direction of infrastructure development, which raises nation-wide discussion on these issues. How should we make our country's growth strategy for sustainable development? How should we realize the grand design of infrastructure needed for the implementation of such a strategy? It is obvious that further discussions are needed for these challenging questions. With an aim to promote such discussions, this paper reviews the history of public works and the professional practices (or accomplishments) of our great civil engineers, and discusses the future of public works and the roles of civil engineers based on their origin. Further, in this paper, the author, as the chairman of the Public Works Committee of Japan Civil Engineering Contractors Association, introduces the Association's proposal of "realization of an attractive construction industry." However, for its realization, sustainable institutional arrangements under social consensus are indispensable. Also, individual engineer must establish his/her own identity based on sense of social ethics. It is the author's hope that, through these journals, the professional practices of civil engineers will be widely known to the public with objective logics and discussed to achieve social consensus.

  15. The language of architecture and civil engineering

    CERN Document Server

    Riejos, Ana Ma Roldan

    2011-01-01

    This book not only provides unique and in-depth information to understand the language of architecture and civil engineering, it is also helpful for students and professionals who need to improve their linguistic skills. The LACE book includes plenty of

  16. Usage of dynamic plans in civil engineering of Serbia

    Directory of Open Access Journals (Sweden)

    Zlatanović Milorad

    2011-01-01

    Full Text Available For a successful realization of a civil engineering project, it is necessary to possess good quality dynamic plans of construction works and of resource involvement. Depending on the type and size of the structure, appropriate type of dynamic plan ought to be used. The plan realization must constantly be observed and updated in order to ensure their full effectiveness. This paper presents the results of a research through a survey of dynamic plan implementation in our civil engineering practice. The results are based on the data processed from the responses to the questions asked in the survey of 45 construction enterprises in Serbia.

  17. Biotechnologies and biomimetics for civil engineering

    CERN Document Server

    Labrincha, J; Diamanti, M; Yu, C-P; Lee, H

    2015-01-01

    Putting forward an innovative approach to solving current technological problems faced by human society, this book encompasses a holistic way of perceiving the potential of natural systems. Nature has developed several materials and processes which both maintain an optimal performance and are also totally biodegradable, properties which can be used in civil engineering. Delivering the latest research findings to building industry professionals and other practitioners, as well as containing information useful to the public, ‘Biotechnologies and Biomimetics for Civil Engineering’ serves as an important tool to tackle the challenges of a more sustainable construction industry and the future of buildings.

  18. The Language of Civil Engineering: Descriptive, Prescriptive, and Persuasive.

    Science.gov (United States)

    Machauf, Liora

    1990-01-01

    Focuses on the language of civil engineering as manifested in the professional journal "Civil Engineering ASCE." Articles are analyzed, both syntactically and lexically, in terms of three major rhetorical functions: description, prescription, and persuasion. (17 references) (GLR)

  19. Virginia Tech's Michael Duncan receives civil engineering award

    OpenAIRE

    Nystrom, Lynn A.

    2010-01-01

    J. Michael Duncan, Virginia Tech University Distinguished Professor Emeritus of the Via Department of Civil and Environmental Engineering, is the 2010 recipient of the G. Brooks Earnest Award and Lecture from the American Society of Civil Engineers' Cleveland Section.

  20. Evolutionary algorithms and metaheuristics in civil engineering and Construction management

    CERN Document Server

    Greiner, David

    2015-01-01

    This book focuses on civil and structural engineering and construction management applications. The contributions constitute modified, extended and improved versions of research presented at the  minisymposium organized by the editors at the ECCOMAS conference on this topic in Barcelona 2014.

  1. Predicaments and Expectations of Civil Engineering Education in China.

    Science.gov (United States)

    Liu, Xila; Fang, Dongping

    2002-01-01

    Explains the goals of civil engineering in China which include integrated knowledge structure and multi-level knowledge and abilities of innovation, adaptation, cooperation, communication, and organization. Discusses the challenges of student-centered education, dynamics of education organization, and open education. (Author/YDS)

  2. HKU's double professional civil engineering and law programme

    OpenAIRE

    Yeung, AT; Ng, ST; Tham, LG; Lee, PKK

    2010-01-01

    The scale and complexity of civil engineering projects are increasing exponentially. Coupled with the growing trend of globalisation, the demand for high-calibre civil engineers who are also knowledgeable in legal matters is increasing. Driven by an aspiration to prepare civil engineering graduates with a solid foundation in both civil engineering and law, The University of Hong Kong has developed the first 5-year credit-based double professional degree programme in Hong Kong, which leads to ...

  3. William Knocke receives 2008 Virginia Outstanding Civil Engineer Award

    OpenAIRE

    Daniilidi, Christina

    2008-01-01

    William R. Knocke, W.C. English Professor and head of the Charles E. Via, Jr. Department of Civil and Environmental Engineering at Virginia Tech, was awarded the 2008 Virginia Outstanding Civil Engineer Award at the Virginia Section of the American Society of Civil Engineers' (ASCE) banquet, held recently in Williamsburg, Va.

  4. Some Basic Considerations about the Necessities and Possibilities of Cooperation between Civil Engineers and Engineering Geologists

    Science.gov (United States)

    Katzenbach, Rolf; Bachmann, Gregor

    The education of civil engineers and engineering geologists is different. While civil engineers are commonly educated and trained in mathematical and mechanical based sciences as statics, geotechnics, structural engineering etc. the education of engineering geologists is mainly based on natural science, added with some engineering courses. Nevertheless, the careers of both have in spite of their different priorities and capabilities - which all are necessary in complex building projects - several points of contact. Especially during the construction of tunnels, the cooperation of civil engineers and engineering geologists is important. For example the inhomogeneous rock and groundwater conditions have decisive importance for the bearing and deformation behaviour of those constructions. Therefore a detailed investigation program and a qualified geotechnical and geological interpretation and modelling is necessary. The typical field of a civil engineer is the examination of the structural stability (Ultimate Limit State - ULS) and the serviceability (Serviceability Limit State - SLS) of the construction due to Euro-Code (especially EC 1 and EC 7) and the corresponding national technical standards (codes, recommendations, guidelines etc.). A main activity of an engineering geologist is the assessment of the natural circumstances. The cooperation of both professions is settled in the valuation of the subsoil conditions before and during the construction process. The cooperation of engineering geologists and geotechnical engineers lies in the assessment of the subsoil conditions before and during the construction process of ambitious projects with special regard to the bearing and deformation behaviour which is highly influenced by the inhomogeneity and the variance of the subsoil conditions.

  5. Probability, statistics, and decision for civil engineers

    CERN Document Server

    Benjamin, Jack R

    2014-01-01

    Designed as a primary text for civil engineering courses, as a supplementary text for courses in other areas, or for self-study by practicing engineers, this text covers the development of decision theory and the applications of probability within the field. Extensive use of examples and illustrations helps readers develop an in-depth appreciation for the theory's applications, which include strength of materials, soil mechanics, construction planning, and water-resource design. A focus on fundamentals includes such subjects as Bayesian statistical decision theory, subjective probability, and

  6. Metaheuristics and optimization in civil engineering

    CERN Document Server

    Bekdaş, Gebrail; Nigdeli, Sinan

    2016-01-01

    This timely book deals with a current topic, i.e. the applications of metaheuristic algorithms, with a primary focus on optimization problems in civil engineering. The first chapter offers a concise overview of different kinds of metaheuristic algorithms, explaining their advantages in solving complex engineering problems that cannot be effectively tackled by traditional methods, and citing the most important works for further reading. The remaining chapters report on advanced studies on the applications of certain metaheuristic algorithms to specific engineering problems. Genetic algorithm, bat algorithm, cuckoo search, harmony search and simulated annealing are just some of the methods presented and discussed step by step in real-application contexts, in which they are often used in combination with each other. Thanks to its synthetic yet meticulous and practice-oriented approach, the book is a perfect guide for graduate students, researchers and professionals willing to applying metaheuristic algorithms in...

  7. International Civil and Infrastructure Engineering Conference 2014

    CERN Document Server

    Yusoff, Marina; Alisibramulisi, Anizahyati; Amin, Norliyati; Ismail, Zulhabri

    2015-01-01

    The special focus of this proceedings is to cover the areas of infrastructure engineering and sustainability management. The state-of-the art information in infrastructure and sustainable issues in engineering covers earthquake, bioremediation, synergistic management, timber engineering, flood management and intelligent transport systems. It provides precise information with regards to innovative research development in construction materials and structures in addition to a compilation of interdisciplinary finding combining nano-materials and engineering.

  8. International Civil and Infrastructure Engineering Conference 2013

    CERN Document Server

    Yusoff, Marina; Ismail, Zulhabri; Amin, Norliyati; Fadzil, Mohd

    2014-01-01

    The special focus of this proceedings is to cover the areas of infrastructure engineering and sustainability management. The state-of-the art information in infrastructure and sustainable issues in engineering covers earthquake, bioremediation, synergistic management, timber engineering, flood management and intelligent transport systems. It provides precise information with regards to innovative research development in construction materials and structures in addition to a compilation of interdisciplinary finding combining nano-materials and engineering.

  9. Subsurface defect detection in first layer of pavement structure and reinforced civil engineering structure by FRP bonding using active infrared thermography

    Science.gov (United States)

    Dumoulin, Jean; Ibos, Laurent

    2010-05-01

    In many countries road network ages while road traffic and maintenance costs increase. Nowadays, thousand and thousand kilometers of roads are each year submitted to surface distress survey. They generally lean on pavement surface imaging measurement techniques, mainly in the visible spectrum, coupled with visual inspection or image processing detection of emergent distresses. Nevertheless, optimisation of maintenance works and costs requires an early detection of defects within the pavement structure when they still are hidden from surface. Accordingly, alternative measurement techniques for pavement monitoring are currently under investigation (seismic methods, step frequency radar). On the other hand, strengthening or retrofitting of reinforced concrete structures by externally bonded Fiber Reinforced Polymer (FRP) systems is now a commonly accepted and widespread technique. However, the use of bonding techniques always implies following rigorous installing procedures. To ensure the durability and long-term performance of the FRP reinforcements, conformance checking through an in situ auscultation of the bonded FRP systems is then highly suitable. The quality-control program should involve a set of adequate inspections and tests. Visual inspection and acoustic sounding (hammer tap) are commonly used to detect delaminations (disbonds) but are unable to provide sufficient information about the depth (in case of multilayered composite) and width of debonded areas. Consequently, rapid and efficient inspection methods are also required. Among the non destructive methods under study, active infrared thermography was investigated both for pavement and civil engineering structures through experiments in laboratory and numerical simulations, because of its ability to be also used on field. Pulse Thermography (PT), Pulse Phase Thermography (PPT) and Principal Component Thermography (PCT) approaches have been tested onto pavement samples and CFRP bonding on concrete

  10. LHC Civil Engineering Construction Contracts Cost Monitoring and Budget Forecasting

    CERN Document Server

    Skelton, K

    2000-01-01

    The Civil Engineering project for the LHC is estimated at 350 MCHF, of which about 316 MCHF is for the construction contracts. These contracts are based on a system of remeasurement whereby the consultant estimates the quantities required for the construction of each structure and the contractor commits himself to the unit price, which define the initial tender price. There are many factors that affect the final price for these contracts, from increases or decreases in quantities of the estimated amounts in the original bill of quantities to variations to the contract. This paper will look at how these factors change costs at the individual level of a structure to the overall costs of the contract. It will look at how the Civil Engineering Group monitors these changes to calculate cash flows and final costs and how this information is used as a basis for budget forecasts.

  11. Special issue on non-destructive testing in civil engineering

    OpenAIRE

    DEROBERT, Xavier; Abraham, Odile; Wiggenhauser, H.

    2012-01-01

    This special issue of the Journal of Infrastructure Systems aims to provide an overview on advances of advanced Non Destructive Testing applied to civil engineering structures. Indeed we are at a stage where a substantial part of the infrastructure is entering a critical age. Dams, bridges, tunnels, pavements, nuclear power plants, etc. require sustainable maintenance to qualify for extension of their service life in good condition and safely with appropriate service level. NDT methods hav...

  12. Contract Management of LHC Civil Engineering at Point 5

    CERN Document Server

    Osborne, J A

    1999-01-01

    Civil engineering work commenced in August 1998 at LEP Point 5 for the underground and surface works necessary to accommodate the CMS detector for the LHC project. The principal underground works consist of two parallel caverns, separated by a support pillar, two new shafts, a number of smaller connection and service galleries and tunnel enlargements on the existing LEP tunnel. The surface works consist of the 140 m long SX building for the detector assembly and numerous other steel and concrete structures necessary for the installation and operation of CMS. The civil engineering design and supervision has been awarded to a joint venture of Gibb (UK), SGI (Switzerland) and Geoconsult (Austria), and the contracting to a joint venture of Dragados (Spain) and Seli (Italy) for 112 MCHF. The aim of this paper is to discuss the management of this contract and in particular how the various parties interact in order to work most efficiently.

  13. Information systems for civil engineering; Sistemas de informacion para ingenieria civil

    Energy Technology Data Exchange (ETDEWEB)

    De Buen R, Pablo R; Alvarado G, Alonso; Alaniz Q, Felipe de J; Guerrero F, Vicente A. [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2004-07-01

    Since its beginnings, in the Gerencia de Ingenieria Civil (GIC) of the Instituto de Investigaciones Electricas (IIE) the interest has existed to take advantage of and to promote the advantages that the appropriate use of the computerizing systems in the different tasks of civil engineering in the power sector represent. Either as a part of its infrastructure or at the request of their clients, at the GIC have been developed calculation systems for the analysis and design of special structures such as turbo-generators foundations, poles for transmission and distribution and transmission towers, in addition the information systems for the consultation and the analysis of diverse information, such as the related to the Manuals of Civil Works of the Comision Federal de Electricidad (CFE) or the relative to the existing instruments in the large dams of our country. In this article are briefly described some of the computer systems developed by the GIC in recent years. [Spanish] Desde sus inicios, en la Gerencia de Ingenieria Civil (GIC) del Instituto de Investigaciones Electricas (IIE) ha existido el interes por aprovechar y promover las ventajas que representa el uso adecuado de los sistemas de computo en las diferentes tareas de ingenieria civil en el sector energetico. Ya sea como parte de su infraestructura o a solicitud de sus clientes, en la GIC se han desarrollado sistemas de calculo para el analisis y diseno de estructuras especiales como lo son las cimentaciones de turbogeneradores, los postes para transmision y distribucion y las torres de transmision, ademas de sistemas de informacion para la consulta y el analisis de informacion diversa, como es la relacionada con los manuales de obras civiles de la Comision Federal de Electricidad (CFE) o a la relativa a los instrumentos existentes en las grandes presas de nuestro pais. En este articulo se describen brevemente algunos de los sistemas de computo desarrollos por la GIC en anos recientes.

  14. Blade containment evaluation of civil aircraft engines

    Institute of Scientific and Technical Information of China (English)

    Yang Bin

    2013-01-01

    The potential hazard resulting from uncontained turbine engine rotor blade failure has always been the long-term concern of each aero engine manufacturer,and to fully contain the failed blades under critical operating conditions is also one of the most important considerations to meet the rotor integrity requirements.Usually,there are many factors involving the engine containment capability which need to be reviewed during the engine design phases,such as case thickness,rotor support structure,blade weight and shape,etc.However,the premier method to demonstrate the engine containment capability is the fan blade-off test and margin of safety (MS) analysis.Based on a concrete engine model,this paper aims to explain the key points of aero engine containment requirements in FAR Part 33,and introduces the implementation of MS analysis and fan blade-off test in the engine airworthiness certification.Through the introduction,it would be greatly helpful to the industrial community to evaluate the engine containment capability and prepare the final test demonstration in engine certification procedure.

  15. Civil Engineering Construction of Underground Works

    CERN Document Server

    Rammer, H

    1999-01-01

    For the first time at CERN, new shafts and caverns will be excavated inside a surface building. The LHC civil engineering construction for the ATLAS experiment has been designed such that the experimental hall will be completed to the extent that it can provide a secure, weatherproof and sound insulated covering to the shaft excavation area. The construction of the two access shafts and the experimental cavern will follow and will be carried out inside the building. This unconventional method of working allows the excavation of the Molasse rock in the dry, which is essential for this type of rock, and ensures reduced environmental pollution by noise and dust. The paper will present the technical infrastructure required for this particular construction method, explain its advantages and disadvantages, and compare it with a conventional method of underground excavations to be used on the same work site for the construction of the service cavern.

  16. Fundamentals of Structural Engineering

    CERN Document Server

    Connor, Jerome J

    2013-01-01

    Fundamentals of Structural Engineering provides a balanced, seamless treatment of both classic, analytic methods and contemporary, computer-based techniques for conceptualizing and designing a structure. The book’s principle goal is to foster an intuitive understanding of structural behavior based on problem solving experience for students of civil engineering and architecture who have been exposed to the basic concepts of engineering mechanics and mechanics of materials. Making it distinct from many other undergraduate textbooks, the authors of this text recognize the notion that engineers reason about behavior using simple models and intuition they acquire through problem solving. The approach adopted in this text develops this type of intuition  by presenting extensive, realistic problems and case studies together with computer simulation, which allows rapid exploration of  how a structure responds to changes in geometry and physical parameters. This book also: Emphasizes problem-based understanding of...

  17. 高层建筑钢结构在土建工程中的应用分析%The Application Analysis of High-rise Steel Structure in Civil Engineering

    Institute of Scientific and Technical Information of China (English)

    彭卓维

    2014-01-01

    近年来,随着城市和效区大规模的土建施工,高层建筑越来越多,钢结构施工成为高层建筑中不可缺少的一部分。本文针对高层建筑钢结构在土建工程中的应用进行了简要分析。%In recent years, with the large-scale civil engine-ering construction of urban and suburban, more and more high-rise buildings have been built and the steel structure construction become an indispensable part of in high-rise buildings. This article carries on the briefly analysis of the High-rise building steel structure in civil engineering.

  18. Geotechnical information as an important element when planning and designing civil engineering work Bogotá

    OpenAIRE

    Denisse Cangrejo Aljure; Carlos Gustavo Infante

    2010-01-01

    The city of Bogota provides a dynamic scenario re civil construction work; it is thereby essential to have relevant information available for the suitable planning and evaluation of engineering work from both the structural and budgetary points of view. The moisture content of soil has become a most important variable, given its great impact on placing structures in Bogota. This is why this work on city zoning aimed at orientating planning and designing civil engineering work has been done a...

  19. Modal Estimation of Civil Structures Subject to Ambient and Harmonic Excitation

    DEFF Research Database (Denmark)

    Andersen, Palle; Brincker, Rune; Ventura, Carlos;

    2008-01-01

    In this paper addresses the problems of separating structural modes and harmonics arising from sinusoidal excitation. Though the problem is mostly know in mechanical engineering applications such as rotating machinery, some civil engineering applications experiences the same challenges. A robust...... and fast harmonic detection procedure is presented and illustrated on a civil engineering case....

  20. The capacity limitations of power transmission cable lines in the structure of civil and industry engineering networks

    Directory of Open Access Journals (Sweden)

    V.V. Titkov

    2014-10-01

    Full Text Available The present study analyses heat modes of high voltage cable lines typical for laying in the area of communications, different obstacles and engineering networks, such as, for instance, hot water supply lines. It is well-known that the load capacity of modern high voltage cable lines with a plastic insulation is limited by the maximum permissible heating temperature of 90 °C. This study focuses on two typical cases of heating mains influence on heat exchange of a power cable line with surrounding ground: 1 the rapprochement of a power cable line with a heating main – the segment of a parallel disposal of a cable line and a heating pipe; 2 the intersection of a cable line and a heating main – the area where the cable line going above the heating main crosses it at the angle of 90 degrees. We have proposed the model of a prolonged cylinder with inhomogeneous thermophysical and heat exchange parameters distribution along this cable for the temperature distribution along a power cable in terms of non-regular laying. The finite-element method has been used to solve the problem of cable line heating fields near heating main calculation. A quantitative analysis of the cases described above has revealed that the local cable temperature excess up to several tenths of degrees is typical for them. It leads to the transmission capacity decrease by 20–30 % and limits the cable line ability to cover peak loads occurring in industrial, natural or other disasters. Besides, cable line segment spillover out of permissible temperature mode leads to emergency, power shortage and further repairing efforts. While engineering and calculations of the cable lines modes, our proposed techniques allow avoiding critical temperature conditions which may lead to the consequences described above.

  1. MODELING AND OPTIMIZATION OF ORGANIZATIONAL AND TECHNOLOGICAL SOLUTIONS IN THE CONSTRUCTION OF ENERGY EFFICIENT FENCING STRUCTURES IN CIVIL ENGINEERING

    Directory of Open Access Journals (Sweden)

    Lapidus Azariy Abramovich

    2016-05-01

    Full Text Available The investigations of thermal and technical features of enveloping structures show that at the present time the structures of outer walls with hinged ventilated facades are the most energy efficient. The facades with air space are widely used both in residential and in public buildings. In the recent years the problems related to energy efficient enveloping structures are being actively investigated. The problems of modern Russian and foreign energy-efficient facade systems, their technical and structural solutions and the main methods of their installation are reviewed in the article. The methods of solving the tasks of research are proposed and the obtained results are described. The development of organizational and technological solutions for sealing of joints of front panels during installation of ventilated facades by pre-assembly method was the basis of the method of solving of the problem. The obtained data together with the developed structural and technological solutions may become the base for the development of technical rules and regulations.

  2. FOREWORD: Cultural heritage and civil engineering Cultural heritage and civil engineering

    Science.gov (United States)

    Masini, Nicola; Soldovieri, Francesco; Alvarez de Buergo, Monica; Dumoulin, Jean

    2012-08-01

    This special issue of Journal of Geophysics and Engineering offers a diverse panorama of approaches and technologies that aim to characterize and analyse the state of conservation and health of cultural heritage and civil infrastructure. In particular, it provides a significant overview not only of the effectiveness but also of the limitations of single diagnostic techniques, which can be overcome through the integration of different methods and technologies and/or the use of robust and novel data processing techniques. The choice of diagnostic strategy depends on the material (concrete, masonry), the spatial characteristics of the objects or sites, the value of the objects to be investigated (cultural or not), the aim of the investigation (knowledge, conservation, restoration) and the issues to be addressed (monitoring, decay assessment, etc). The paper by Fornaro et al reports an important technological advance in the field of slow deformation monitoring of civil infrastructure by means of differential interferometric synthetic aperture radar (SAR) from satellite platforms. The paper shows how the joint exploitation of the last generation of X-band SAR sensors, such as TerraSAR-X, and novel tomographic approaches makes possible advanced multi-dimensional imaging of real structures such as the Las Vegas Monorail. Within the same SAR-based applications, Tapete et al tested the capability of persistent scatterer interferometry (PSI) techniques in the preventative diagnosis of deformation threatening the structural stability of archaeological monuments and buried structures in the Roman Forum, Palatino Hill and Oppio Hill in the centre of Rome. A PSInSAR processing approach, based on the use of the SqueeSAR algorithm, has been shown to be highly suitable for retrieving not only information about displacements of the archaeological remains, but also evidence of criticalities affecting partially or totally buried structures, such as those discovered at Nero's Golden

  3. Multi-hazard approaches to civil infrastructure engineering

    CERN Document Server

    LaFave, James

    2016-01-01

    This collection focuses on the development of novel approaches to address one of the most pressing challenges of civil engineering, namely the mitigation of natural hazards. Numerous engineering books to date have focused on, and illustrate considerable progress toward, mitigation of individual hazards (earthquakes, wind, and so forth.). The current volume addresses concerns related to overall safety, sustainability and resilience of the built environment when subject to multiple hazards: natural disaster events that are concurrent and either correlated (e.g., wind and surge); uncorrelated (e.g., earthquake and flood); cascading (e.g., fire following earthquake); or uncorrelated and occurring at different times (e.g., wind and earthquake). The authors examine a range of specific topics including methodologies for vulnerability assessment of structures, new techniques to reduce the system demands through control systems; instrumentation, monitoring and condition assessment of structures and foundations; new te...

  4. Grouting applications in civil engineering. Volume I and II

    International Nuclear Information System (INIS)

    A comprehensive description of grouting applications in civil engineering is presented that can serve as a basis for the selection of grouting methods in the borehole sealing problem. The breadth and depth of the study was assured by conducting the main part of the review, the collection and evaluation of information, without specifically considering the borehole sealing problem (but naturally incorporating any aspect of civil engineering applications that could be of potential use). Grouting is very much an art and not a science. In most cases, it is a trial and error procedure where an inexpensive method is initially tried and then a more expensive one is used until the desired results are obtained. Once a desired effect is obtained, it is difficult to credit any one procedure with the success because the results are due to the summation of all the methods used. In many cases, the method that proves successful reflects a small abnormality in the ground or structure rather than its overall characteristics. Hence, successful grouting relies heavily on good engineering judgement and experience, and not on a basic set of standard correlations or equations. 800 references

  5. Infrared emissivity measurements of building and civil engineering materials: a new device for measuring emissivity

    OpenAIRE

    Monchau, Jean-Pierre; Marchetti, Mario; Ibos, Laurent; Dumoulin, Jean; Feuillet, Vincent; Candau, Yves

    2014-01-01

    The knowledge of the infrared emissivity of materials used in buildings and civil engineering structures is useful for two specific approaches. First, quantitative diagnosis of buildings or civil engineering infrastructures by infrared thermography requires emissivity values in the spectral bandwidth of the camera used for measurements, in order to obtain accurate surface temperatures; for instance, emissivity in the band III domain is required when using cameras with uncooled detectors (such...

  6. The Challenges of LHC Civil Engineering

    CERN Multimedia

    CERN-ETT-EC-MM Team

    2003-01-01

    A mosaic of works, structures and workers of differents crafts and origins. Three consulting consortia for the engineering and the follow-up of the works. Four industrial consortia for doing the job. A young team of 25 CERN staff, 30 surface buildings, 32 caverns of all sizes, 170 000 m3 of concrete, 420 000 m3 excavated.1998-2004 : six years of work and 340 millions Swiss Francs.

  7. Ideas in Practice: The Mississippi River: Humanities and Civil Engineering.

    Science.gov (United States)

    Vonalt, Larry; And Others

    1980-01-01

    Describes a course offered for the freshman civil engineering major at the University of Missouri-Rolla. The rationale of developing the course which focuses on the symbolic, social, and technological aspects of the Mississippi River is included. (HM)

  8. Morphological Characteristics of the Language used in Civil Engineering

    OpenAIRE

    Liliana RICINSCHI

    2014-01-01

    This paper aims at investigating the particular features of civil engineering written discourse. A first assumption is made that the language employed in civil engineering is a subcategory of English for Specific Purposes. As part of ESP, it is thus bound to have a set of specialized lexical and grammatical features which are not in the repertoire of the non-users of that particular domain: complex noun phrases, special use of articles, special use of modal verbs, frequency of the passive voi...

  9. CER: A Handy Tool for the Civil Engineer

    OpenAIRE

    Klein, Helena

    1998-01-01

    Because of the dynamic developments in information technology, the role of the libraries is also changing dramatically. Access to electronic resources, as a service, has become more common for all those working in libraries. This paper focuses on the Civil Engineering Resources (CER), an electronic resource service available on the World Wide Web. It was developed within the library of Civil Engineering at Lund Institute of Technology, compiling about 500 selected Internet Resour...

  10. Pluridisciplinarity vs. interdisciplinarity in civil engineering education in seismic areas

    Directory of Open Access Journals (Sweden)

    Emil-Sever GEORGESCU

    2012-12-01

    Full Text Available Civil engineers are involved in building and maintaining a built environment that meets the sustainable development requirements. This environment is interdisciplinary in its nature, as it results from an interaction between different actors (architects, city planners, authorities, clients, civil engineers. Professional formation and training of engineers is a result of the didactic and technical efforts, which later will be reflected in the way constructions are being designed and built, so that engineers are not considered simple workers. Thus, when discussing professional formation and training of engineers, one should debate the necessary steps they have to take in their relationship with other disciplines. Practicing civil engineering in seismic risk areas in Romania adds specific requirements.

  11. Building Management and ICT Learning in Civil Engineering Education

    DEFF Research Database (Denmark)

    Christiansson, Per Lennart

    2005-01-01

    of ICT in construction courses are reported with particular emphasis on the Aalborg University Project Oriented Problem Based learning model, PPBL. Experiences from present and possible future use of virtual learning spaces and ICT tools to support teaching, learning, and (meta) information handling......The paper presents structures of the learning domains of building informatics exemplified with experiences from building management civil engineering and open education in Industrial IT at Aalborg University. The courses cover areas such as; object oriented programming and relational database...... design, human computer interface, user environment design and usability engineering, computer supported collaborative working, knowledge management, virtual buildings, intelligent buildings, and building systems simulation. Experiences from many years involvement in ICT supported learning and development...

  12. Applications of Statistics and Probability in Civil Engineering

    DEFF Research Database (Denmark)

    Faber, Michael Havbro

    contains the proceedings of the 11th International Conference on Applications of Statistics and Probability in Civil Engineering (ICASP11, Zürich, Switzerland, 1-4 August 2011). The book focuses not only on the more traditional technical issues, but also emphasizes the societal context...... and reliability in engineering; to professionals and engineers, including insurance and consulting companies working with natural hazards, design, operation and maintenance of civil engineering and industrial facilities; and to decision makers and professionals in the public sector, including nongovernmental...

  13. Civil engineering status report for the CMS worksite

    CERN Document Server

    Osborne, J

    2004-01-01

    Civil engineering construction started at Point 5 in 1998 using a contract based upon the standard FIDIC model (Fédération Internationale des Ingénieurs Conseils). The new surface buildings and underground structures are necessary to accommodate the CMS detector for the LHC Project. The principal underground works at Point 5 consist of two new shafts, two caverns along with a number of small connection tunnels and galleries. At Point 5, the works are now 90% complete. Three surface buildings are due to be completed in 2004, namely the SX extension over the PX56 shaft, including the "Bouchon", and also the SCX and SDX buildings. Underground, the USC55 cavern secondary lining is now complete and the UXC55 cavern lining due for completion in the summer of 2004. The aim of this paper is to present the status of the civil engineering on this worksite and in particular the challenges encountered during construction and experience gained using a FIDIC based contract.

  14. Proposal for the increase of the contract amounts for LHC civil engineering construction and civil engineering consultancy contracts

    CERN Document Server

    2001-01-01

    This document concerns the increase of the contract amounts for LHC civil engineering construction contracts and civil engineering consultancy contracts. The Finance Committee is invited to agree to the increase of the contract amounts with: - the joint venture TEERAG-ASDAG (AT), C. BARESEL (DE) and LOCHER (CH) for civil engineering construction, package 1, for a revised total amount of 91 500 000 Swiss francs, subject to revision; - the joint venture EDF (FR) and KNIGHT&PIESOLD (GB) for the provision of civil engineering consultancy services, package 1, for a revised total amount of 14 400 000 Swiss francs, subject to revision; - the joint venture TAYLOR WOODROW (GB), AMEC (GB) and SPIE BATIGNOLLES (FR) for civil engineering construction, package 3a, for a revised total amount of 118 000 000 Swiss francs, subject to revision; - the joint venture BROWN&ROOT (GB), INTECSA (ES) and HIDROTECNICA (PT) for the provision of civil engineering consultancy services, package 3, for a revised total amount of 14 ...

  15. Learning by Seeing: The TEMAS Multimedia Learning Objects for Civil Engineers

    Science.gov (United States)

    Cadoni, Ezio; Botturi, Luca; Forni, Daniele

    2008-01-01

    A goal of engineering and architecture bachelor and master's programs is to provide students with practical and technical preparation in the mechanical characterization of materials and structures: future architects and civil engineers should be able to recognize and describe different construction materials and their behavior when used for…

  16. Structural motion engineering

    CERN Document Server

    Connor, Jerome

    2014-01-01

    This innovative volume provides a systematic treatment of the basic concepts and computational procedures for structural motion design and engineering for civil installations. The authors illustrate the application of motion control to a wide spectrum of buildings through many examples. Topics covered include optimal stiffness distributions for building-type structures, the role of damping in controlling motion, tuned mass dampers, base isolation systems, linear control, and nonlinear control. The book's primary objective is the satisfaction of motion-related design requirements, such as restrictions on displacement and acceleration. The book is ideal for practicing engineers and graduate students. This book also: ·         Broadens practitioners' understanding of structural motion control, the enabling technology for motion-based design ·         Provides readers the tools to satisfy requirements of modern, ultra-high strength materials that lack corresponding stiffness, where the motion re...

  17. Importance of Nanotechnology in Civil Engineering

    Directory of Open Access Journals (Sweden)

    Kaizar Hossain

    2015-02-01

    Full Text Available Nanotechnology is an extremely wide term, the definition of which varies from field to field. Most commonly, nanotechnology is defined as “…the understanding, control, and restructuring of matter on the order of nanometers (i.e., less than 100 nm to create materials with fundamentally new properties and functions” [1]. Nanotechnology refers to the manipulation of individual atoms and molecules, by engineering matter at the atomic level.  At the nanoscale, familiar materials can have dramatically different properties: changes can affect color, elasticity, strength, conductivity, and other properties. Nanoparticles also have an increased surface area relative to their volume, making them especially reactive and useful in energy storage, for making composite materials, or as drug delivery devices. Nano materials are also able to be integrated with biological materials, producing new structures that have properties of both types of materials. There are two main types of approaches to nanotechnology: The “top-down” approach and the “bottom-up” approach. The “top-down” approach involves taking larger structures that are either reduced down in size until they reach the nano-scale, or are deconstructed into their composite parts. On the other hand, the “bottom-up” approach is where materials are constructed from the atomic or molecular components.Key Words: materials, structures, nanoparticles, Titanium dioxide,

  18. Experimental, Numerical and Virtual Tools for Civil Engineering Students

    Directory of Open Access Journals (Sweden)

    José Couto Marques

    2011-04-01

    Full Text Available Three sets of teaching tools developed for Civil Engineering students are presented in this paper. The first is a didactic test frame for structural mechanics and its virtual replica. The second is an outfit for small scale seepage studies. The third is a set of portable devices for visual demonstration of several phenomena of interest for introductory soil mechanics classes.

  19. Applications of distributed fiber Bragg grating sensors in civil engineering

    Science.gov (United States)

    Nellen, Philipp M.; Broennimann, Rolf; Sennhauser, Urs J.; Askins, Charles G.; Putnam, Martin A.

    1995-09-01

    We report on civil engineering applications of wavelength multiplexed optical-fiber Bragg grating arrays produced directly on the draw tower for testing and surveying advanced structures and material like carbon fiber reinforced concrete elements and prestressing tendons. We equipped a 6 m X 0.9 m X 0.5 m concrete cantilever beam reinforced with carbon fiber lamellas with fiber Bragg grating sensors. Static and dynamic strain levels up to 1500 micrometers /m were measured with a Michelson interferometer used as Fourier spectrometer with resolutions of about 10 micrometers /m for all sensors. Comparative measurements with electrical resistance strain gauges were in good agreement with the fiber optic results. We used the fiber sensors in two different arrangements: some Bragg grating array elements measured the local strain while others were configured in an extensometric way to measure moderate strain over 0.1-1 m.

  20. Modelling of Electrokinetic Processes in Civil and Environmental Engineering Applications

    DEFF Research Database (Denmark)

    Paz-Garcia, Juan Manuel; Johannesson, Björn; Ottosen, Lisbeth M.;

    2011-01-01

    increases the understanding of the main physicochemical aspects affecting the process. Results from simulations of some test examples are presented, showing the versatility of the model. Two types of enhanced methods are compared: The electrokinetic desalination of a brick sample, using carbonated clay......A mathematical model for the electrokinetic phenomena is described. Numerical simulations of different applications of electrokinetic techniques to the fields of civil and environmental engineering are included, showing the versatility and consistency of the model. The electrokinetics phenomena...... the porous materials undergoes an electroosmotic flow subject to externally applied electric fields. Electroosmotic transport makes electrokinetic techniques suitable for the mobilization of non-charged particles within the pore structure, such as the organic contaminants in soil. Chemical equilibrium...

  1. Quality Assessment Survey at the School of Civil Engineering at Aalborg University

    DEFF Research Database (Denmark)

    Brohus, Henrik

    2008-01-01

    As part of an improved quality assessment procedure at the School of Civil Engineering at Aalborg University, an online survey has been undertaken among all students. Due to external requirements and a wish for more structured feedback, an online questionnaire was presented to all students under...... the study board of civil engineering. The questionnaire was jointly developed for all study boards at Aalborg University. The questionnaire forms an investigation of students' satisfaction and evaluation of the overall structure of the education including self-reported performance assessment. The paper...

  2. Fiber-optic sensor applications in civil and geotechnical engineering

    Science.gov (United States)

    Habel, Wolfgang R.; Krebber, Katerina

    2011-09-01

    Different types of fiber-optic sensors based on glass or polymeric fibers are used to evaluate material behavior or to monitor the integrity and long-term stability of load-bearing structure components. Fiber-optic sensors have been established as a new and innovative measurement technology in very different fields, such as material science, civil engineering, light-weight structures, geotechnical areas as well as chemical and high-voltage substations. Very often, mechanical quantities such as deformation, strain or vibration are requested. However, measurement of chemical quantities in materials and structure components, such as pH value in steel reinforced concrete members also provides information about the integrity of concrete structures. A special fiber-optic chemical sensor for monitoring the alkaline state (pH value) of the cementitious matrix in steel-reinforced concrete structures with the purpose of early detection of corrosion-initiating factors is described. The paper presents the use of several fiber-optic sensor technologies in engineering. One example concerns the use of highly resolving concrete-embeddable fiber Fabry-Perot acoustic emission (AE) sensors for the assessment of the bearing behaviour of large concrete piles in existing foundations or during and after its installation. Another example concerns fiber Bragg grating (FBG) sensors attached to anchor steels (micro piles) to measure the strain distribution in loaded soil anchors. Polymer optical fibers (POF) can be — because of their high elasticity and high ultimate strain — well integrated into textiles to monitor their deformation behaviour. Such "intelligent" textiles are capable of monitoring displacement of soil or slopes, critical mechanical deformation in geotechnical structures (dikes, dams, and embankments) as well as in masonry structures during and after earthquakes.

  3. Self powered system for civil structures

    Science.gov (United States)

    Shoureshi, Rahmat A.

    2009-03-01

    Globally, civil infrastructures are deteriorating at an alarming rate caused by overuse, overloading, aging, damage or failure due to natural or man-made hazards. With such a vast network of deteriorating infrastructure, there is a growing interest in continuous monitoring technologies. In order to provide a true distributed sensor and control system for civil structures, we are developing a Structural Nervous System that mimics key attributes of a human nervous system. This nervous system is made up of building blocks that are designed based on mechanoreceptors as a fundamentally new approach for the development of a structural health monitoring and diagnostic system that utilizes the recently developed piezo-fibers capable of sensing and actuation. In particular, our research has been focused on producing a sensory nervous system for civil structures by using piezo-fibers as sensory receptors, nerve fibers, neuronal pools, and spinocervical tract to the nodal and central processing units. This paper presents up to date results of our research, including the design and analysis of the structural nervous system.

  4. Developing Research Skills for Civil Engineers: A Library Contribution.

    Science.gov (United States)

    Bruce, C. S.; Brameld, G. H.

    1990-01-01

    A library instruction program has been instituted in civil engineering at the Queensland University of Technology (Australia) in an effort to improve the research skills of fourth year students working on research projects. Students with extended library instruction were found to have better information-seeking behavior than others. (Author/MSE)

  5. The potential of biobased materials in the civil engineering sector

    OpenAIRE

    Venema, Anne

    2012-01-01

    SUMMARY Large quantities of materials are used in the Dutch civil engineering sector every year. Many of these materials have a significant impact on the environment because these materials are based on non-renewable resources and the production is often

  6. IEMAE: mathematics & statistics applied to civil engineering & building

    OpenAIRE

    Serrat Piè, Carles

    2009-01-01

    IEMAE (Institut d’Estadística i Matemàtica Aplicada a l’Edificació - Institute of Statistics and Mathematics Applied to the Building Construction) is an academic institution interested in solving Multidisciplinary problems in the civil and building engineering area by using statistics and mathematics disciplines

  7. Construction Site Environmental Impact in Civil Engineering Education

    Science.gov (United States)

    Teixeira, Jose M. Cardoso

    2005-01-01

    The environmental impact of construction activity has gained increasing importance in the last few years and become a key subject for civil engineering education. A survey of Portuguese higher education institutions shows that concern with this topic is mostly directed at the impact of large construction projects and especially focused on their…

  8. Identification & Control of Special Processes in Civil Engineering Construction

    Institute of Scientific and Technical Information of China (English)

    张怡

    2009-01-01

    @@ A lot ot special processes exist in operation of construction enterprises. Construction enterprises are categorized as of high risks in certification under the quality management system. Taking civil engineering construction of building projects as an example, the writer analyzes how construction enterprises shall identify and control the special processes.

  9. Severity estimation and shop visit prediction of civil aircraft engines

    OpenAIRE

    Hanumanthan, Hariharan

    2009-01-01

    To sustain in the vibrant field of civil aviation, the aircraft and engine manufacturers are in the pursuit of delivering efficient systems with the best economics. In umpteen scenarios of growing interest, engine maintenance cost due to scheduled maintenance is of importance. The current research is focused on estimation of the maintenance factors, such as severity and shop visit rate to study the operational scenarios and concurrent technologies. The severity, defined as r...

  10. 19 January 2011 - British University of Manchester, Vice-President and Dean for the Faculty of Engineering and Physical Sciences Professor of Structural Engineering School of Mechanical, Aerospace and Civil Engineering C. Bailey in CERN Control Centre with Department Head P. Collier; at LHCb with R. Lindner and ATLAS underground experimental area with Deputy Spokesperson D. Charlton, througout accompanied by . Collier with R. Appleby and F. Loebinger

    CERN Multimedia

    Maximilien Brice

    2011-01-01

    19 January 2011 - British University of Manchester, Vice-President and Dean for the Faculty of Engineering and Physical Sciences Professor of Structural Engineering School of Mechanical, Aerospace and Civil Engineering C. Bailey in CERN Control Centre with Department Head P. Collier; at LHCb with R. Lindner and ATLAS underground experimental area with Deputy Spokesperson D. Charlton, througout accompanied by . Collier with R. Appleby and F. Loebinger

  11. Proceedings [of the] 1994 annual conference [of the] Canadian Society for Civil Engineering. Comptes rendus [du] congres annuel 1994 [de la] Societe Canadienne de Genie Civil

    Energy Technology Data Exchange (ETDEWEB)

    1994-01-01

    The fourth of four volumes of a conference on civil engineering presented papers on engineering mechanics, including dynamics and vibrations, computational modelling, porous media, geomechanics, fluid mechanics, finite element methods, structural dynamics, mechanics of materials, computer-aided engineering and optimization, boundary element methods, stress analysis, mechanics of composites and damage, and structural stability. Separate abstracts have been prepared for 12 papers from the volume.

  12. Civil Engineering in the ATLAS cavern

    CERN Multimedia

    Laurent Guiraud

    2000-01-01

    Ghostly figures can be seen wandering the cavern that will eventually house the ATLAS experiment, part of the LHC at CERN. Quite fitting since the detector will hunt the illusive 'ghostly' particles, such as the Higgs boson and dark matter. These engineers are excavating the huge cavern that has to be anchored from above as the detector will fill so much space that there is no room for support pillars.

  13. Importance of Nanotechnology in Civil Engineering

    OpenAIRE

    Kaizar Hossain; Shaik Rameeja

    2015-01-01

    Nanotechnology is an extremely wide term, the definition of which varies from field to field. Most commonly, nanotechnology is defined as “…the understanding, control, and restructuring of matter on the order of nanometers (i.e., less than 100 nm) to create materials with fundamentally new properties and functions” [1]. Nanotechnology refers to the manipulation of individual atoms and molecules, by engineering matter at the atomic level.  At the nanoscale, familiar materials can have dramatic...

  14. Increase of the contract amounts for LHC civil-engineering construction and civil-engineering consultancy contracts

    CERN Document Server

    2005-01-01

    This document concerns the increase of the contract amounts for LHC civil-engineering construction and civil-engineering consultancy, Package 2. The Finance Committee is invited to take note of the increase of the contract amounts with: - the joint venture DRAGADOS (ES) and SELI (IT) for civil-engineering construction, LHC Package 2, for an amount of 28 087 000 Swiss francs, subject to revision, in the amount previously announced to Finance Committee (CERN/FC/4516) of 132 200 000 Swiss francs, subject to revision, bringing the total to a maximum amount of 160 287 000 Swiss francs, subject to revision. - the joint venture GIBB (GB), GEOCONSULT (AT) and SGI (CH) for the provision of civil-engineering consultancy services, LHC Package 2, for an amount of 900 000 Swiss francs, subject to revision, in the amount previously announced to Finance Committee of 13 800 000 Swiss francs, subject to revision, bringing the total to a maximum amount of 14 700 000 Swiss francs, subject to revision

  15. Studying civil engineering alumni from a Mexican university

    Directory of Open Access Journals (Sweden)

    Rómel G Solís Carcaño

    2010-04-01

    Full Text Available The present study was aimed at knowing the opinion of graduates from a Mexican university’s Civil Engineering department about several aspects related to their first years as professionals. The study explored aspects such as graduation index, the difficulty of inserting themselves into the labour market, their opinion about the civil engi- neering programme and their interest in continuing their studies. A questionnaire was prepared for gathering the information based on various international, national and local criteria. The results revealed that the graduates had experienced little difficulty in becoming inserting into the local labour market; however, their professional performance had not been as satisfactory as they had expected.

  16. Impact of Past Project on the Educational Experience of Civil Engineering Students

    OpenAIRE

    Leong Lau Teck; Elleithy Wael

    2016-01-01

    Civil engineering lecturers need to develop effective early emphasis and educational challenges in order to prepare the current students with in-depth fundamental principles, applicable technical knowledge, and realistic appreciation on challenges faced by practicing civil engineers. In view of its importance, the use of past civil engineering projects as case studies have been integrated into the existing civil engineering curriculum at the University of Nottingham Malaysia Campus. In order ...

  17. Civil Engineering Feasibility Studies for Future Ring Colliders at CERN

    CERN Document Server

    Bruning, O; Myers, S; Osborne, J; Rossi, L; Waaijer, C; Zimmermann, F

    2013-01-01

    CERN civil engineers are studying the feasibility of several potential ring colliders to complement the LHC: an 80km circular tunnel to house the TLEP and VHE-LHC, and the ring-ring and linac-ring options for the LHeC. The feasibility of these projects is largely dependent on civil design and geotechnical and environmental risks. As civil infrastructure works typically represent one third of the cost of major physics projects, it is critical that the construction costs are well understood from the conceptual stage. This proceeding presents the first results of the feasibility studies for the 80km tunnel and the linac-ring LHeC. Presented at IPAC'13 Shanghai, 12-17 May 2013

  18. A Study of the Relationship Between the Practice of Civil Engineering and Student Courses: Volume 1.

    Science.gov (United States)

    Bull, A. J. U.; Richardson, E.

    Australian civil engineers were surveyed for a study intended to establish a model for development based on a list of the basic stock of knowledge and techniques that need to be mastered by the graduate civil engineer. Following a brief introduction and summary, chapters 3-7 review the survey objectives, civil engineering definitions and…

  19. Role of Academic & Research Libraries and International Collaboration on Civil Engineering Education and Its Continuous Professional Development

    OpenAIRE

    Itoh, Yoshito

    2008-01-01

    Proceedings of the 2nd International Civil Engineering Conference on Civil Engineering and Sustainable Development, "modernizing our infrastructure", 23rd-25th September, 2008, Mombasa, Kenya (CE2008)

  20. Monitoring and evaluating civil structures using measured vibration

    Science.gov (United States)

    Straser, Erik G.; Kiremidjian, Anne S.

    1996-04-01

    The need for a rapid assessment of the state of critical and conventional civil structures, such as bridges, control centers, airports, and hospitals, among many, has been amply demonstrated during recent natural disasters. Research is underway at Stanford University to develop a state-of-the-art automated damage monitoring system for long term and extreme event monitoring based on both ambient and forced response measurements. Such research requires a multi-disciplinary approach harnessing the talents and expertise of civil, electrical, and mechanical engineering to arrive at a novel hardware and software solution. Recent advances in silicon micro-machining and microprocessor design allow for the economical integration of sensing, processing, and communication components. Coupling these technological advances with parameter identification algorithms allows for the realization of extreme event damage monitoring systems for civil structures. This paper addresses the first steps toward the development of a near real-time damage diagnostic and monitoring system based on structural response to extreme events. Specifically, micro-electro-mechanical- structures (MEMS) and microcontroller embedded systems (MES) are demonstrated to be an effective platform for the measurement and analysis of civil structures. Experimental laboratory tests with small scale model specimens and a preliminary sensor module are used to evaluate hardware and obtain structural response data from input accelerograms. A multi-step analysis procedure employing ordinary least squares (OLS), extended Kalman filtering (EKF), and a substructuring approach is conducted to extract system characteristics of the model. Results from experimental tests and system identification (SI) procedures as well as fundamental system design issues are presented.

  1. Organization and management of the LHC civil-engineering contracts

    CERN Document Server

    Watson, T

    1999-01-01

    Since July 1994, the CERN Civil Engineering group within the ST division has been preparing and engaging contracts related to the Large Hadron Collider (LHC) project. Several of these contracts have values in excess of 10 MCHF and will be executed over a number of years; as such they represent an important part of the infrastructure works required for the LHC. To date, in excess of two hundred and fifty companies have been consulted in relation to these contracts. Contracts or orders have been placed with over thirty companies or joint ventures of companies from nearly all the CERN Member States. This paper aims to show the inter-relationships between these contracts and how the Civil Engineering group is carrying out the management of these important LHC contracts. The organization of the group will be explained along with the roles of individual members within the group.

  2. Outsourced design services lessons learned from LHC civil engineering

    CERN Document Server

    Watson, T

    2003-01-01

    In April 1996 CERN awarded three contracts for the provision of civil engineering design and site supervision services associated with the LHC Project. These three contracts with an average value at signature of 12MCHF were placed using the “two envelope” award system. Eight firms from six member states were integrated into three Joint Ventures. For Projects prior to the LHC, CERN would have carried out the design and supervision using in-house staff. The change to out-sourced services represented a major step for CERN. After seven years, the contracts are now coming to their conclusion. This paper aims to discuss the reasons why these contracts were originally implemented, the lessons than have been learnt over the last seven years and conclusions on how CERN could approach the need for civil engineering design services in the future.

  3. Civil Engineering/ Graduate Students/ Johnston & Jeffryes/ University of Minnesota/ 2012

    OpenAIRE

    Johnston, Lisa; Jeffryes, Jon

    2015-01-01

    From the University of Minnesota, this case study describes the seven modules that comprise their data information literacy program for students in Civil Engineering. The modules include: data management, organization and documentation, data access and ownership, data sharing and re-use, and preservation. Materials include a book chapter describing the case study, the syllabus for the program, a template for developing a data management plan and the evaluation forms that were used.

  4. Introduction to biotechnologies and biomimetics for civil engineering

    OpenAIRE

    Torgal, Fernando Pacheco

    2015-01-01

    This chapter starts with an overview on the sustainable development crucial challenges. The ones directly or indirectly related to the field of civil engineering are highlighted. These include greenhouse gas emissions (GHG) related to the energy consumption of the built environment, aggravated by urbanization forecast expansion, and the recent increase in building cooling needs due to climate change. It also includes the depletion of nonrenewable raw materials and mining-rel...

  5. Zdravko Kapović: Geodesy in Civil Engineering

    Directory of Open Access Journals (Sweden)

    Gorana Novaković

    2010-06-01

    Full Text Available The textbook titled Geodesy in Civil Engineering by Zdravko Kapović was presented to the professional public at the Faculty of Geodesy of the University of Zagreb on May 6, 2010. The book is recognised as a university textbook, it is written in Croatian, hardbound, in B5 format, with ISBN 978-93-6082-13-1. The textbook contains 185 pages, 148 pictures and 6 tables, and its content is divided into nine chapters.

  6. Development of a Civil Engineer Corps community portal prototype

    OpenAIRE

    Rader, Neil Christopher.

    2002-01-01

    Approved for public release; distribution is unlimited The Civil Engineer Corps (CEC) is a relatively small Navy community consisting of approximately 1300 officers. Billets for the CEC are located around the world, and the community requires the ability to disseminate information as efficiently as possible to all corners of the world. Currently, information resources are available in both print and electronic forms in numerous locations. This thesis explores the concept of providing a sin...

  7. Civil Engineer Corps accessions: forecasting interview requirements and travel budgets

    OpenAIRE

    Sisson, Max

    2008-01-01

    MBA Professional Report The purpose of this MBA Project is to provide insight into interview requirements and travel budgets for the Civil Engineer Corps accessions team through the use of forecasting. The goal of this project is to provide a forecasting model that can predict interview requirements and form the basis for constructing travel budgets and estimates. The primary tool utilized is spreadsheet modeling to include extensive linear regression analysis. Additional insight is pr...

  8. Integrating Sustainability into Civil Engineering Education: Curriculum Development & Implementation

    OpenAIRE

    SINNOTT, DEREK; Thomas, Ken

    2012-01-01

    The role of the civil engineer as a specialist, expert or generalist in society is constantly evolving to meet the changing demands of government and industry to achieve a global sustainable world. Consequently, it is imperative that third level institutions meet the challenge of embedding sustainability into curriculum, providing students with generic competencies required for future employment. This paper describes the development and implementation of a curriculum for a new level 8 d...

  9. Civil Engineering for the SHiP facility

    CERN Document Server

    Osborne, John Andrew

    2015-01-01

    The enlarged scope of the recently proposed experiment to search for Heavy Neutral Leptons, SPSC-EOI-010, is a general purpose fixed target facility which in the initial phase is aimed at a general Search for Hidden Particles (SHiP) as well as tau neutrino physics. This report represents an annex to the SHiP Technical Proposal summarizing the civil engineering considerations for SHiP.

  10. WORKERS’ SALARY ACCOUNTING IN COST OF CIVIL ENGINEERING WORKS

    OpenAIRE

    O. S. Goloubova; U. V. Sosnovskaya

    2014-01-01

    A normative method for price formation established in civil engineering determines a procedure of cost formation in respect of any work. However, main problems are still pending in spite of introduction of new estimate-normative РСН-2007-base. The paper considers problems concerning inclusion of workers’ salary in the cost of works, tendencies of the 2008-legislation alterations, their effect on growth of work cost. 

  11. Development of Digital Computation of Building and Civil Engineering Quantities

    Directory of Open Access Journals (Sweden)

    Aderinola, O.S

    2014-06-01

    Full Text Available The work of Building and Civil engineering demands a greater knowledge, skill and precision in quantity estimation.The manual method of estimating quantities for building and civil engineering works has posed potential problem areas on work that is undertaken. The low reliability of manual estimation indicates discrepancies in the accuracy of quantities computed manually,hence,the introduction of a digital computation.It is envisaged that this method will greatly reduce the complexities of different aspects when computing quantities for projects, as well as reduce the time to complete the computation and therefore projects can be started earlier.The paper reviewed the procedures involved in the development of a computer program for the digital computation of Building and Civil engineering quantities.The program was developed using Microsoft Visual C SHARP (C# programming language and Microsoft Visual studio. The steps/procedure used in achieving the development of the computer program was (1.designing the application interface,(2 adding controls to the window and (3writing codes behind the interface.The digital computation was tested using a proposed Road project and a proposed administrative buildingand the results showed an average of 100% of the items has 0 to 10 percentage difference for the road and 92% for the building in the final outputs of the quantities obtained through the manual computation and the digital computation and the software could therefore be said to be accurate and reliable.

  12. CDIO Projects in Civil Engineering Study Program at DTU

    DEFF Research Database (Denmark)

    Krogsbøll, Anette; Simonsen, Claus; Christensen, Jørgen Erik;

    2011-01-01

    or a design build project on each of the first four semesters. In this paper the four projects in the civil engineering study program are described along with a brief description of the entire study program. The aim is to provide additional information and documentation to accompany an exposition where......In 2008 all Bachelor of engineering study programs at the Technical University of Denmark (DTU) have been adopted to the “Conceive – Design – Implement – Operate” approach. As part of the necessary changes it was decided that all seven study programs should have a cross disciplinary project...... students present their projects. Learning outcomes, training and assessment of personal, professional and social engineering skills are described from a project point of view. Progression of engineering skills is discussed from a study program perspective. The interrelation between the various elements...

  13. A review on smart self-sensing composite materials for civil engineering applications

    OpenAIRE

    Sohel Rana; Subramani P; Raul Fangueiro; Antonio Gomes Correia

    2016-01-01

    Self-sensing composites are becoming highly attractive for civil engineering applications to improve the safety and performance of structures. These smart composites show a detectable change in their electrical resistivity with applied stress or strain and this unique characteristic make them useful for health monitoring of structures. Till date, different forms of carbon composites, i.e. short fibre, continuous fibre, particles, nano fibres, nanotubes, etc. have been utilized for this purpos...

  14. Airborne remote sensors applied to engineering geology and civil works design investigations

    Science.gov (United States)

    Gelnett, R. H.

    1975-01-01

    The usefulness of various airborne remote sensing systems in the detection and identification of regional and specific geologic structural features that may affect the design and location of engineering structures on major civil works projects is evaluated. The Butler Valley Dam and Blue Lake Project in northern California was selected as a demonstration site. Findings derived from the interpretation of various kinds of imagery used are given.

  15. A review of distributed optical fiber sensors for civil engineering applications

    OpenAIRE

    António Barrias; Casas, Joan R.; Sergi Villalba

    2016-01-01

    The application of structural health monitoring (SHM) systems to civil engineering structures has been a developing studied and practiced topic, that has allowed for a better understanding of structures’ conditions and increasingly lead to a more cost-effective management of those infrastructures. In this field, the use of fiber optic sensors has been studied, discussed and practiced with encouraging results. The possibility of understanding and monitor the distributed behavior of extensive s...

  16. When Civil Structures Bump into Automation Technologies: An interview with Dr. Kuo-Chun Chang

    Directory of Open Access Journals (Sweden)

    Chih-Ting Lin

    2011-12-01

    Full Text Available Automation technologies are extensively adopted in the fields of mechanics and manufacture. Thanks to continuous progress in scientific development, automation has been used increasingly in civil structures and structural monitoring. Through the interview of the director of NCREE, Dr. Kuo-Chun Chang, we hope that readers can examine the future developments and limits of automation technology on application in the field of civil engineering.

  17. Image processing for safety assessment in civil engineering.

    Science.gov (United States)

    Ferrer, Belen; Pomares, Juan C; Irles, Ramon; Espinosa, Julian; Mas, David

    2013-06-20

    Behavior analysis of construction safety systems is of fundamental importance to avoid accidental injuries. Traditionally, measurements of dynamic actions in civil engineering have been done through accelerometers, but high-speed cameras and image processing techniques can play an important role in this area. Here, we propose using morphological image filtering and Hough transform on high-speed video sequence as tools for dynamic measurements on that field. The presented method is applied to obtain the trajectory and acceleration of a cylindrical ballast falling from a building and trapped by a thread net. Results show that safety recommendations given in construction codes can be potentially dangerous for workers.

  18. 3rd International Civil and Infrastructure Engineering Conference

    CERN Document Server

    Hamid, Nor; Arshad, Mohd; Arshad, Ahmad; Ridzuan, Ahmad; Awang, Haryati

    2016-01-01

    The special focus of these proceedings is on the areas of infrastructure engineering and sustainability management. They provide detailed information on innovative research developments in construction materials and structures, in addition to a compilation of interdisciplinary findings combining nano-materials and engineering. The coverage of cutting-edge infrastructure and sustainability issues in engineering includes earthquakes, bioremediation, synergistic management, timber engineering, flood management and intelligent transport systems.

  19. Shock-driven fluid-structure interaction for civil design

    Energy Technology Data Exchange (ETDEWEB)

    Wood, Stephen L [ORNL; Deiterding, Ralf [ORNL

    2011-11-01

    The multiphysics fluid-structure interaction simulation of shock-loaded structures requires the dynamic coupling of a shock-capturing flow solver to a solid mechanics solver for large deformations. The Virtual Test Facility combines a Cartesian embedded boundary approach with dynamic mesh adaptation in a generic software framework of flow solvers using hydrodynamic finite volume upwind schemes that are coupled to various explicit finite element solid dynamics solvers (Deiterding et al., 2006). This paper gives a brief overview of the computational approach and presents first simulations that utilize the general purpose solid dynamics code DYNA3D for complex 3D structures of interest in civil engineering. Results from simulations of a reinforced column, highway bridge, multistory building, and nuclear reactor building are presented.

  20. Laser ultrasonics for civil engineering : some applications in development for concrete non destructive testing

    International Nuclear Information System (INIS)

    Non destructive testing of civil engineering infrastructures is becoming of primary importance for their diagnosis, residual time life estimation and/or structural health monitoring. A particularity of civil engineering application is the large size of the survey zones and the expected low cost of inspection. In this context non contact ultrasonics may offer the possibility to built robots that can automatically scan large areas (or eventually be integrated in moving vehicles) to recover mechanical properties of material or to perform imagery for geometrical information recovery. In this paper we present two possible applications of in situ laser ultrasonics : one is the detection of voids in tendon duct with the impact echo method, the other is the use of surface waves to recover mechanical properties of the first centimetres of concrete structures (here after called cover concrete).

  1. Non-destructive testing in civil engineering (NDT-CE). Vol. 1. Lectures

    Energy Technology Data Exchange (ETDEWEB)

    Schickert, G. [ed.; Wiggenhauser, H. [ed.

    1995-12-31

    This volume contains about 100 lectures which were presented at the International Symposium on Non-Destructive Testing in Civil Engineering in Berlin. The topical sessions on NDT methods are dealing with: Structures, bridges; Simulation; Corrosion; Moisture; Magnetic and electrical methods; Interferometry; Quality control; Ultrasound; Building dynamics; Building inspection; Soils, piles, subsurface detection; Case studies; Impact echo; Materials; Monitoring; Acoustic emission, Electro acoustics; Historical monuments, masonry; Radar; IR-thermography, radiation; Reinforcements. (MM) (MM)

  2. The Post Cold War Civil Engineer Corps : what has changed and why

    OpenAIRE

    Ammons, Tony L

    1997-01-01

    Approved for public release; distribution is unlimited With the end of the Cold War the military services have experienced significant cuts in endstrength. Within the Navy, the Civil Engineer Corps (CEC) has also experienced some reductions. This thesis sought to determine how CEC endstrength is derived and whether it declined commensurate with overall naval officer endstrength. The command and billet structures for the CEC in 1986 and 1996 were used to represent the Cold War and Post Cold...

  3. A Case Study: Problem-Based Learning for Civil Engineering Students in Transportation Courses

    Science.gov (United States)

    Ahern, A. A.

    2010-01-01

    This paper describes two case studies where problem-based learning (PBL) has been introduced to undergraduate civil engineering students in University College Dublin. PBL has recently been put in place in the penultimate and final year transport engineering classes in the civil engineering degree in University College Dublin. In this case study,…

  4. George Filz named Charles E. Via Jr. Professor of Civil and Environmental Engineering

    OpenAIRE

    Crumbley, Liz

    2007-01-01

    George M. Filz of Blacksburg, professor of civil and environmental engineering in the College of Engineering at Virginia Tech, was appointed the Charles E. Via Jr. Professor of Civil and Environmental Engineering by the Virginia Tech Board of Visitors during the board's quarterly meeting August 27.

  5. REALIZATION OF COMPETENCE-BASED APPROACH IN THE TEACHING OF FOREIGN LANGUAGES TO CIVIL ENGINEERING STUDENTS

    OpenAIRE

    Kruchinina, G.; Patyaeva, N.

    2008-01-01

    The article deals with the problems of improving the quality of teaching foreign languages to civil engineering students when competence-based approach is used to setting teaching objectives and planning the results of education. The authors describe the model of the didactic system for developing foreign language competence of civil engineering students in their professional domain. The results of the experiment carried out to develop foreign language competence of civil engineering students...

  6. Analysis on Construction Technologies of Concrete Structure in Civil Engineering Buildings%土木工程建筑中混凝土结构的施工技术分析

    Institute of Scientific and Technical Information of China (English)

    段富振

    2015-01-01

    随着我国社会和经济的不断发展,土木工程建筑业也得到了飞速的发展与进步,土木工程建筑施工中最常采用的材料就是混凝土,为了保证土木工程施工质量,在对土木工程混凝土结构进行施工时对混凝土所具有的性能有了更高的要求.本文针对工程施工中混凝土产生裂缝的原因,对土木工程建筑混凝土结构的相关施工技术进行分析探究,提出笔者的思考和建议,仅供参考.%With the continuous development of society and economy in our country, civil engineering construction indus?try has also achievedrapid development and progress, and the material that is most commonly used in civil engineering construction is concrete, in order to ensure the quality of civil engineering construction, in the construction of concretes?tructure in civil engineering, there arehigher requirementson the performance of concrete. According to the cause of con?crete cracks in the construction, the construction technologies related to civil engineering construction concrete struc?tureareanalyzedandinvestigated, and the author's thinking and suggestions are put forward for your reference.

  7. A TOTAL QUALITY MANAGEMENT APPROACH TO CIVIL ENGINEERING CONSULTING

    Directory of Open Access Journals (Sweden)

    G.A.L. Ambrose

    2012-01-01

    Full Text Available

    ENGLISH ABSTRACT: The article describes the development of a framework for the implementation of a Total Quality Management (TQM approach in the civil consulting industry through the five phases of the typical civil engineering project. For any project to be successful the project team members must take collective and individual responsibility for their role in the project implementation. The organisational goal is “to make money now and in the future”. To achieve this goal the organization must provide value to its clientele. The clients are searching for the silver bullet; double the performance at half the price. TQM provides a means to achieve this goal.

    AFRIKAANSE OPSOMMING: Die artikel beskryf die ontwikkeling van 'n raamwerk vir die implementering van 'n gehaltebestuurstelsel vir die siviele raadgewende bedryf soos dit deelneem aan die vyf fases van 'n tipiese siviele ingenieursprojek. Vir die suksesvolle afhandeling van 'n projek is dit noodsaaklik dat alle projekspanlede gesamentlik en afsonderlik verantwoordelikheid moet aanvaar vir hulle eie betrokkenheid by die projekimplementering. Die organisasie se oogmerk is om “nou en in die toekoms geld te maak”. Ten einde hierdie oogmerk te bereik moet die organisasie waarde vir sy kliënte bied. 'n Gehaltebestuurstelsel voorsien die gereedskap om hierdie doelwit te bereik.

  8. Compressor Study to Meet Large Civil Tilt Rotor Engine Requirements

    Science.gov (United States)

    Veres, Joseph P.

    2009-01-01

    A vehicle concept study has been made to meet the requirements of the Large Civil Tilt Rotorcraft vehicle mission. A vehicle concept was determined, and a notional turboshaft engine system study was conducted. The engine study defined requirements for the major engine components, including the compressor. The compressor design-point goal was to deliver a pressure ratio of 31:1 at an inlet weight flow of 28.4 lbm/sec. To perform a conceptual design of two potential compressor configurations to meet the design requirement, a mean-line compressor flow analysis and design code were used. The first configuration is an eight-stage axial compressor. Some challenges of the all-axial compressor are the small blade spans of the rear-block stages being 0.28 in., resulting in the last-stage blade tip clearance-to-span ratio of 2.4 percent. The second configuration is a seven-stage axial compressor, with a centrifugal stage having a 0.28-in. impeller-exit blade span. The compressors conceptual designs helped estimate the flow path dimensions, rotor leading and trailing edge blade angles, flow conditions, and velocity triangles for each stage.

  9. IMPORTANCE OF GEOTECHNICS IN TODAY'S AND FUTURE CIVIL ENGINEERING - Public image, risks and responsibilities and future aspects of civil/geotechnical engineering

    OpenAIRE

    Brandl, Heinz

    2011-01-01

    This contribution is dedicated to the public image of the civil engineer and geotechnical engineer, respectively, seen from an ethical and philosophical point of view. Discrepancies between professional opinions, the gap between theory and practice, pros and cons of codes or regulations, and the lifelong learning society are discussed on the basis of the author's nearly fifty years of comprehensive professional experience. Furthermore, the environmental challenge to civil/geotechnical enginee...

  10. Civil engineering at the crossroads in the twenty-first century.

    Science.gov (United States)

    Ramírez, Francisco; Seco, Andres

    2012-12-01

    The twenty-first century presents a major challenge for civil engineering. The magnitude and future importance of some of the problems perceived by society are directly related to the field of the civil engineer, implying an inescapable burden of responsibility for a group whose technical soundness, rational approach and efficiency is highly valued and respected by the citizen. However, the substantial changes in society and in the way it perceives the problems that it considers important call for a thorough review of our structures, both professional and educational; so that our profession, with its undeniable historical prestige, may modernize certain approaches and attitudes in order to continue to be a reliable instrument in the service of society, giving priority from an ethical standpoint to its actions in pursuit of "the public good". It possesses important tools to facilitate this work (new technologies, the development of communications, the transmission of scientific thought.···); but there is nevertheless a need for deep reflection on the very essence of civil engineering: what we want it to be in the future, and the ability and willingness to take the lead at a time when society needs disinterested messages, technically supported, reasonably presented and dispassionately transmitted.

  11. Civil engineering at the crossroads in the twenty-first century.

    Science.gov (United States)

    Ramírez, Francisco; Seco, Andres

    2012-12-01

    The twenty-first century presents a major challenge for civil engineering. The magnitude and future importance of some of the problems perceived by society are directly related to the field of the civil engineer, implying an inescapable burden of responsibility for a group whose technical soundness, rational approach and efficiency is highly valued and respected by the citizen. However, the substantial changes in society and in the way it perceives the problems that it considers important call for a thorough review of our structures, both professional and educational; so that our profession, with its undeniable historical prestige, may modernize certain approaches and attitudes in order to continue to be a reliable instrument in the service of society, giving priority from an ethical standpoint to its actions in pursuit of "the public good". It possesses important tools to facilitate this work (new technologies, the development of communications, the transmission of scientific thought.···); but there is nevertheless a need for deep reflection on the very essence of civil engineering: what we want it to be in the future, and the ability and willingness to take the lead at a time when society needs disinterested messages, technically supported, reasonably presented and dispassionately transmitted. PMID:21380736

  12. A Strategic Approach for Supporting the Future of Civil Engineering Education in Europe

    Science.gov (United States)

    Angelides, Demos C.; Loukogeorgaki, Eva

    2005-01-01

    A new strategic vision of the extensively debated European higher education is proposed with focus on civil engineering. Civil engineering education for the future is considered with relevance to potential world-wide trends and anticipated societal requirements and, therefore, required employee qualifications of the construction-related providers…

  13. What Are the Perceptions of Lecturers towards Using Cooperative Learning in Civil Engineering?

    Science.gov (United States)

    Ahern, Aoife

    2007-01-01

    The objective of the current paper is to examine how group learning and cooperative learning are used in civil engineering courses. The paper defines group learning and cooperative learning in the first section. It is hypothesized that group learning is used in civil engineering courses to build teamwork skills and communication skills among civil…

  14. Developing a Dynamics and Vibrations Course for Civil Engineering Students Based on Fundamental-Principles

    Science.gov (United States)

    Barroso, Luciana R.; Morgan, James R.

    2012-01-01

    This paper describes the creation and evolution of an undergraduate dynamics and vibrations course for civil engineering students. Incorporating vibrations into the course allows students to see and study "real" civil engineering applications of the course content. This connection of academic principles to real life situations is in…

  15. Are Quantity Surveyors Competent to Value for Civil Engineering Works? Evaluating QSs' Competencies and Militating Factors

    Science.gov (United States)

    Olawumi, Timothy Oluwatosin; Ayegun, Olaleke Amos

    2016-01-01

    The role of the quantity surveyor is one that is often unclear amongst the general public. This study discussed the competencies of the quantity surveyor in measuring and managing civil engineering works and also carrying out the financial management for civil engineering construction projects; also outlined the various competencies and skills…

  16. From ``wiggly structures'' to ``unshaky towers'': problem framing, solution finding, and negotiation of courses of actions during a civil engineering unit for elementary students

    Science.gov (United States)

    Roth, Wolff-Michael

    1995-12-01

    The present study was designed to investigate problem- and solution-related activity of elementary students in ill-defined and open-ended settings. One Grade 4/5 class of 28 students engaged in the activities of the “Engineering for Children: Structures” curriculum, designed as a vehicle for introducing science concepts, providing ill-defined problem solving contexts, and fostering positive attitudes towards science and technology. Data included video recordings, ethnographic field notes, student produced artefacts (projects and engineering logbooks), and interviews with teachers and observers. These data supported the notion of problems, solutions, and courses of actions as entities with flexible ontologies. In the course of their negotiations, students demonstrated an uncanny competence to frame and reframe problems and solutions and to decide courses of actions of different complexities in spite of the ambiguous nature of (arte)facts, plans, and language. A case study approach was chosen as the literary device to report these general findings. The discussion focuses on the inevitably ambiguous nature of (arte)facts, plans, and language and the associated notion of “interpretive flexibility.” Suggestions are provided for teachers on how to deal with interpretive flexibility without seeking recourse to the didactic approaches of direct teaching. But what happens when problems and solutions are negotiable, when there are no longer isolated problems which one tries to solve but problems which maintain complex linkages with ensembles of other problems and diverse constraints, or when problems and solutions are simultaneously invented? (Lestel, 1989, p. 692, my translation)

  17. 土木工程结构振动控制技术及其应用研究%Vibration Control Techniques for Civil Engineering Structures and Study of Their Application

    Institute of Scientific and Technical Information of China (English)

    汪正兴; 王波; 李东超

    2009-01-01

    In the light of the engineering practice, the vibration control methods for civil engineering structures are presented and the new type damping systems, such as the tuned liquid and mass damper (TLMD) and the lever mass damper (LMD) , are studied. The tests completed in laboratory and on bridges in the field show that the TLMD is easier to be tuned and has better vibration damping effect and durability because it takes both the advantages of the tuned mass damper (TMD) and the tuned liquid damper (TLD). The theories and laboratory tests also prove that in comparison to the existing vibration damping measures, the LMD has little adverse influence on the bridge aesthetics, is easy to be installed and maintained, has better vibration damping effect and is a kind of "broad-spectrum" damper that is more suitable for vibration control of very long stay cables.%结合工程实际,介绍了结构振动控制方法,并研究液体质量双调谐阻尼器(TLMD)及杠杆质量减振器(LMD)等新型阻尼减振系统.室内及实桥试验表明:由于兼具调谐质量阻尼器(TMD)与调谐液体阻尼器(TLD)的优点,TLMD便于调谐,减振效果与耐久性更好.理论及室内试验证明:与现有减振措施相比,LMD对桥梁景观的不良影响小,易于安装、养护,且减振效果更好,是一种更适于超长斜拉索振动控制的"广谱"减振器.

  18. Analysis on concrete structure construction technologies in civil engineering%土木工程中混凝土结构的施工技术分析

    Institute of Scientific and Technical Information of China (English)

    李冰冰

    2016-01-01

    Starting from four aspects of concrete grade,construction time,construction supervision and post maintenance,the paper analyzes problems existing in concrete construction,and explores concrete structure construction points and mixing proportion design methods,so as to guarantee concrete structure stability and durability.%从混凝土标号、施工时间、施工监管、后期维护四方面,分析了混凝土施工中存在的问题,并探讨了混凝土结构的施工要点及配比设计方法,保证了混凝土结构的稳定性及耐久性。

  19. A Review of Distributed Optical Fiber Sensors for Civil Engineering Applications.

    Science.gov (United States)

    Barrias, António; Casas, Joan R; Villalba, Sergi

    2016-05-23

    The application of structural health monitoring (SHM) systems to civil engineering structures has been a developing studied and practiced topic, that has allowed for a better understanding of structures' conditions and increasingly lead to a more cost-effective management of those infrastructures. In this field, the use of fiber optic sensors has been studied, discussed and practiced with encouraging results. The possibility of understanding and monitor the distributed behavior of extensive stretches of critical structures it's an enormous advantage that distributed fiber optic sensing provides to SHM systems. In the past decade, several R & D studies have been performed with the goal of improving the knowledge and developing new techniques associated with the application of distributed optical fiber sensors (DOFS) in order to widen the range of applications of these sensors and also to obtain more correct and reliable data. This paper presents, after a brief introduction to the theoretical background of DOFS, the latest developments related with the improvement of these products by presenting a wide range of laboratory experiments as well as an extended review of their diverse applications in civil engineering structures.

  20. A Review of Distributed Optical Fiber Sensors for Civil Engineering Applications.

    Science.gov (United States)

    Barrias, António; Casas, Joan R; Villalba, Sergi

    2016-01-01

    The application of structural health monitoring (SHM) systems to civil engineering structures has been a developing studied and practiced topic, that has allowed for a better understanding of structures' conditions and increasingly lead to a more cost-effective management of those infrastructures. In this field, the use of fiber optic sensors has been studied, discussed and practiced with encouraging results. The possibility of understanding and monitor the distributed behavior of extensive stretches of critical structures it's an enormous advantage that distributed fiber optic sensing provides to SHM systems. In the past decade, several R & D studies have been performed with the goal of improving the knowledge and developing new techniques associated with the application of distributed optical fiber sensors (DOFS) in order to widen the range of applications of these sensors and also to obtain more correct and reliable data. This paper presents, after a brief introduction to the theoretical background of DOFS, the latest developments related with the improvement of these products by presenting a wide range of laboratory experiments as well as an extended review of their diverse applications in civil engineering structures. PMID:27223289

  1. Experimental study of damping in civil engineering structures using smart materials (CuAlBe - SMA): an application to a steel portico

    OpenAIRE

    Torra Ferré, Vicenç; Isalgue Buxeda, Antonio; Lovey, Francisco Carlos; Carreras, Guillem; Casciati, Fabio; Soul, H.

    2010-01-01

    The target of the paper focuses in the required properties for successful behavior of the CuAlBe Shape Memory Alloy (SMA) in damping of steel structures under the action of earthquakes. The appropriate fracture – life, the long time of aging, the minor creep effects on cycling, the Clausius-Clapeyron equation and the self-heating effects are also, evaluated. Analysis via simulation using a proprietary model of the SMA behavior furnishes satisfactory results. Our main interest is focused in th...

  2. Civil Engineering Applications of Ground Penetrating Radar in Finland

    Science.gov (United States)

    Pellinen, Terhi; Huuskonen-Snicker, Eeva; Olkkonen, Martta-Kaisa; Eskelinen, Pekka

    2014-05-01

    Ground penetrating radar (GPR) has been used in Finland since 1980's for civil engineering applications. First applications in this field were road surveys and dam inspections. Common GPR applications in road surveys include the thickness evaluation of the pavement, subgrade soil evaluation and evaluation of the soil moisture and frost susceptibility. Since the 1990's, GPR has been used in combination with other non-destructive testing (NDT) methods in road surveys. Recently, more GPR applications have been adopted, such as evaluating bridges, tunnels, railways and concrete elements. Nowadays, compared with other countries GPR is relatively widely used in Finland for road surveys. Quite many companies, universities and research centers in Finland have their own GPR equipment and are involved in the teaching and research of the GPR method. However, further research and promotion of the GPR techniques are still needed since GPR could be used more routinely. GPR has been used to evaluate the air void content of asphalt pavements for years. Air void content is an important quality measure of pavement condition for both the new and old asphalt pavements. The first Finnish guideline was released in 1999 for the method. Air void content is obtained from the GPR data by measuring the dielectric value as continuous record. To obtain air void content data, few pavement cores must be taken for calibration. Accuracy of the method is however questioned because there are other factors that affect the dielectric value of the asphalt layer, in addition to the air void content. Therefore, a research project is currently carried out at Aalto University in Finland. The overall objective is to investigate if the existing GPR technique used in Finland is accurate enough to be used as QC/QA tool in assessing the compaction of asphalt pavements. The project is funded by the Finnish Transport Agency. Further research interests at Aalto University include developing new microwave asphalt

  3. Civil engineering: EDF needs for concrete modelling; Genie civile: analyse des besoins EDF en modelisation du comportement des betons

    Energy Technology Data Exchange (ETDEWEB)

    Didry, O.; Gerard, B.; Bui, D. [Electricite de France (EDF), Direction des Etudes et Recherches, 92 - Clamart (France)

    1997-12-31

    Concrete structures which are encountered at EDF, like all civil engineering structures, age. In order to adapt the maintenance conditions of these structures, particularly to extend their service life, and also to prepare constructions of future structures, tools for predicting the behaviour of these structures in their environment should be available. For EDF the technical risks are high and consequently very appropriate R and D actions are required. In this context the Direction des Etudes et Recherches (DER) has developed a methodology for analysing concrete structure behaviour modelling. This approach has several aims: - making a distinction between the problems which refer to the existing models and those which require R and D; - displaying disciplinary links between different problems encountered on EDF structures (non-linear mechanical, chemical - hydraulic - mechanical coupling, etc); - listing of the existing tools and positioning the DER `Aster` finite element code among them. This document is a state of the art of scientific knowledge intended to shed light on the fields in which one should be involved when there is, on one part a strong requirement on the side of structure operators, and on the other one, the present tools do not allow this requirement to be satisfactorily met. The analysis has been done on 12 scientific subjects: 1) Hydration of concrete at early ages: exothermicity, hardening, autogenous shrinkage; 2) Drying and drying shrinkage; 3) Alkali-silica reaction and bulky stage formation; 4) Long term deterioration by leaching; 5) Ionic diffusion and associated attacks: the chlorides case; 6) Permeability / tightness of concrete; 7) Concretes -nonlinear behaviour and cracking (I): contribution of the plasticity models; 8) Concretes - nonlinear behaviour and cracking (II): contribution of the damage models; 9) Concretes - nonlinear behaviour and cracking (III): the contribution of the probabilistic analysis model; 10) Delayed behaviour of

  4. A Review of Distributed Optical Fiber Sensors for Civil Engineering Applications

    Directory of Open Access Journals (Sweden)

    António Barrias

    2016-05-01

    Full Text Available The application of structural health monitoring (SHM systems to civil engineering structures has been a developing studied and practiced topic, that has allowed for a better understanding of structures’ conditions and increasingly lead to a more cost-effective management of those infrastructures. In this field, the use of fiber optic sensors has been studied, discussed and practiced with encouraging results. The possibility of understanding and monitor the distributed behavior of extensive stretches of critical structures it’s an enormous advantage that distributed fiber optic sensing provides to SHM systems. In the past decade, several R & D studies have been performed with the goal of improving the knowledge and developing new techniques associated with the application of distributed optical fiber sensors (DOFS in order to widen the range of applications of these sensors and also to obtain more correct and reliable data. This paper presents, after a brief introduction to the theoretical background of DOFS, the latest developments related with the improvement of these products by presenting a wide range of laboratory experiments as well as an extended review of their diverse applications in civil engineering structures.

  5. Civil engineering work to raise the level of Route Goward

    CERN Multimedia

    2013-01-01

    Civil engineering work to raise the level of Route Goward will take place during Long Shutdown 1. The work will begin on 18 March 2013 and is expected to last around 5 months.   Route Goward runs over the top of the PS tunnel and is the only access route to the inside of the ring. The layer of shielding backfill beneath this road is the thinnest anywhere on the PS ring. As the purpose of this shielding is to protect against the ionising radiation emitted by the accelerator when in operation, this road has been classified as a “supervised radiation area” according to radiation protection regulations. This classification was merely a temporary solution and, on the recommendation of the PS Radiation Working Group (PSRWG), the decision has been taken to raise the surface level permanently by around 2 m in order to increase the thickness of the shielding and thus lower the dose rate to that of a non-designated area. As the PS tunnel itself is unable to withstand the weight of t...

  6. Learning about Environmental Issues in Engineering Programmes: A Case Study of First-Year Civil Engineering Students' Contextualisation of an Ecology Course

    Science.gov (United States)

    Lundholm, Cecilia

    2004-01-01

    Describes how first-year civil engineering students interpreted the content and structure of an ecology course. Students' learning processes were analysed from an intentional perspective, i.e. a perspective that takes into account the students' educational aims and conceptions of the study situation. Interviews were carried out with six civil…

  7. Two-Word Combinations as English and Lithuanian Terms of Building and Civil Engineering

    Directory of Open Access Journals (Sweden)

    Laimutė Kitkauskienė

    2011-04-01

    Full Text Available This paper studies English and Lithuanian two-word terms of building and civil engineering with respect to their grammatical and semantic structures. By means of a comparative analysis common and diverse structures of the terms under discussion have been considered, and some main two-word parallel term structures are distinguished in these languages. Structural differences are characterized by the grammatical peculiarities of the two languages. Semantic equivalence or non-equivalence of some components of such terms is discussed, and the adequacy of the meaning of the terms compared is explained. The comparative study of such terms should add to quick recognizing of certain structures and to facilitating comprehension and use of the terms. The adequacy of the English and Lithuanian terms means the identity of their meaning, and namely, this is what matters in special-subject communication.

  8. Infrared Emissivity Measurements of Building and Civil Engineering Materials: A New Device for Measuring Emissivity

    Science.gov (United States)

    Monchau, Jean-Pierre; Marchetti, Mario; Ibos, Laurent; Dumoulin, Jean; Feuillet, Vincent; Candau, Yves

    2014-10-01

    The knowledge of the infrared emissivity of materials used in buildings and civil engineering structures is useful for two specific approaches. First, quantitative diagnosis of buildings or civil engineering infrastructures by infrared thermography requires emissivity values in the spectral bandwidth of the camera used for measurements, in order to obtain accurate surface temperatures; for instance, emissivity in the band III domain is required when using cameras with uncooled detectors (such as micro-bolometer arrays). Second, setting up accurate thermal balances by numerical modeling requires the total emissivity value for a large wavelength domain; this is, for instance, the case for computing the road surface temperature to predict ice occurrence. Furthermore, periodical surveys of emissivity variations due to aging or soiling of surfaces could be useful in many situations such as thermal mapping of roads or building insulation diagnosis. The use of portable emissivity measurement devices is required for that purpose. A device using an indirect measurement method was previously developed in our lab; the method uses measurement of the reflectivity from a modulated IR source and requires calibration with a highly reflective surface. However, that device uses a low-frequency, thermal modulation well adapted to laboratory measurements but unfit for fast and in situ measurements. Therefore, a new, portable system which retains the principle of an indirect measurement but uses a faster-frequency, mechanical modulation more appropriate to outdoor measurements was developed. Both devices allow measurements in the broad m to m) and narrow m to m) bands. Experiments were performed on a large number of materials commonly used in buildings and civil engineering structures. The final objective of this work is to build a database of emissivity of these materials. A comparison of laboratory and on-site measurements of emissivity values obtained in both spectral bands will be

  9. Adaptive base-isolation of civil structures using variable amplification

    Institute of Scientific and Technical Information of China (English)

    Kenneth K. Walsh; Makola M. Abdullah

    2006-01-01

    Semi-active dampers are used in base-isolation to reduce the seismic response of civil engineering structures.In the present study, a new semi-active damping system using variable amplification will be investigated for adaptive baseisolation. It uses a novel variable amplification device (VAD) connected in series with a passive damper. The VAD is capable of producing multiple amplification factors, each corresponding to a different amplification state. Forces from the damper are amplified to the structure according to the current amplification state, which is selected via a semi-active control algorithm specifically tailored to the system's unique damping characteristics. To demonstrate the effectiveness of the VAD-damper system for adaptive base-isolation, numerical simulations are conducted for three and seven-story base-isolated buildings subject to both far and near-field ground motions. The results indicate that the system can achieve significant reductions in response compared to the base-isolated buildings with no damper. The proposed system is also found to perform well compared to a typical semi-active damper.

  10. Proceedings [of the] 1994 annual conference [of the] Canadian Society for Civil Engineering. Comptes rendus [du] congres annuel 1994 [de la] Societe Canadienne de Genie Civil

    Energy Technology Data Exchange (ETDEWEB)

    1994-01-01

    The first of four volumes of a conference on civil engineering presented papers on hydrotechnical engineering, construction, transportation, cold regions, history, and sustainable development. Separate abstracts have been prepared for 15 papers from the volume.

  11. The Use of Mini-projects in the Teaching of Geotechnics to Civil Engineering Undergraduates.

    Science.gov (United States)

    Anderson, W. F.; And Others

    1985-01-01

    Geotechnics (which encompasses soil and rock mechanics, engineering geology, foundation design, and ground engineering methods) is a major component of virtually all civil engineering courses. Show how mini-projects are used to teach this subject. Format of projects, development of presentation skills, and assessment considerations are discussed.…

  12. Discovery Mondays: 'The civil engineering genius of the 100-metre deep underground caverns'

    CERN Multimedia

    2004-01-01

    CERN is first and foremost a place where physicists study particle collisions. But to be able to observe the infinitely small, they need huge pieces of equipment, the accelerators and detectors, whose construction, some 100 metres below the earth's surface calls on the services of other fascinating disciplines. Take civil engineering, for example. For the construction of the LHC some 420 000 cubic metres of rock have had to be excavated for the 6500 metres of tunnel, 6 new shafts and 32 underground chambers and caverns. To avoid disrupting other experiments in progress, the work on these exceptional structures has had to be done without creating vibrations. The ATLAS experiment hall, a huge cathedral-like structure 100 metres below ground, is another mind-blowing feat of civil engineering. Its construction involved the use of ground-breaking technology, such as the system for suspending the ceiling put in place during the excavation work. At the next Discovery Monday, the specialists responsible for...

  13. EVALUATION OF THE AFFECTING FACTORS ON MOTIVATION OF CIVIL ENGINEERING STUDENTS IN ISTANBUL

    OpenAIRE

    MISTIKOĞLU, Gülgün

    2012-01-01

    There are interior and exterior factors affecting on motivation. Exterior effects depens on environment conditions and possibilties. In this study, universitys civil engineering students in İstanbul were administered a questionnaire to determine the (exterior) factor affecting their motivation.Prepared questionnaire for civil engineers students are asked to two groups questions.The first group of questions are consist of questions that directly affected the student`s achievement and motivati...

  14. Development of a prototype detailing management system for the Civil Engineer Corps

    OpenAIRE

    Weinstein, Brian Louis

    2002-01-01

    Approved for public release; distribution is unlimited The Civil Engineer Corps (CEC) is a small group of naval officers totaling approximately 1250 officers. Being a small community, the CEC attempts to capture the location and other relevant information of every CEC Officer at a given time and publis h that information in the Chief of Civil Engineers Directory (P-1). The CEC detailers also produce and work off a Staffing Plan to help them manage the movement of officers. The current proc...

  15. A preliminary study on the integral relationship between critical thinking and mathematical thinking among practicing civil engineers

    Science.gov (United States)

    Osman, Sharifah; Mohammad, Shahrin; Abu, Mohd Salleh

    2015-05-01

    Mathematics and engineering are inexorably and significantly linked and essentially required in analyzing and accessing thought to make good judgment when dealing in complex and varied engineering problems. A study in the current engineering education curriculum to explore how the critical thinking and mathematical thinking relates to one another, is therefore timely crucial. Unfortunately, there is not much information available explicating about the link. This paper aims to report findings of a critical review as well as to provide brief description of an on-going research aimed to investigate the dispositions of critical thinking and the relationship and integration between critical thinking and mathematical thinking during the execution of civil engineering tasks. The first part of the paper reports an in-depth review on these matters based on rather limited resources. The review showed a considerable form of congruency between these two perspectives of thinking, with some prevalent trends of engineering workplace tasks, problems and challenges. The second part describes an on-going research to be conducted by the researcher to investigate rigorously the relationship and integration between these two types of thinking within the perspective of civil engineering tasks. A reasonably close non-participant observations and semi-structured interviews will be executed for the pilot and main stages of the study. The data will be analyzed using constant comparative analysis in which the grounded theory methodology will be adopted. The findings will serve as a useful grounding for constructing a substantive theory revealing the integral relationship between critical thinking and mathematical thinking in the real civil engineering practice context. The substantive theory, from an angle of view, is expected to contribute some additional useful information to the engineering program outcomes and engineering education instructions, aligns with the expectations of

  16. On modal energy in civil structural control

    Institute of Scientific and Technical Information of China (English)

    Miao PANG; Tie-jiong LOU; Ming ZHAO

    2008-01-01

    A new control strategy based on modal energy criterion is proposed to demonstrate the effectiveness of the control system in reducing structural earthquake responses. The modal control algorithm combining LQR (linear quadratic regulator) control algorithm is adopted in the discrete time-history analysis. The various modal energy forms are derived by definition of the generalized absolute displacement vector. A preliminary numerical study of the effectiveness of this control strategy is carried out on a 20-storey framed steel structural model. The controlled performance of the model is studied from the perspectives of both response and modal energy. Results show that the modal energy-based control strategy is very effective in reducing structural responses as well as in consuming a large amount of modal energy, while augmentation of additional generalized control force corresponding to the modes that contain little modal energy is unnecessary, as it does little help to improve the controlled structural performance.

  17. Effects of sea water environment on glass fiber reinforced plastic materials used for marine civil engineering constructions

    International Nuclear Information System (INIS)

    Highlights: • Seawater environment over composite material that are suitable for civil applications. • Seawater intake is linked to tensile and flexural strength degradation in GFC. • Fatigue performance of glass composites is similar in seawater environment than in air. - Abstract: Glass fiber composites (GFRP) are common in civil engineering projects, but not in marine structures. One reason is that seawater effects degrade GFRP composites mechanical properties and interlaminar shear strength (ILSS). Here, influence of seawater environment is studied to determine the best composite materials for marine civil engineer applications, studying the influence of several factors in their mechanical properties. This is to determine safety factors to use in the design of structural calculations for marine applications. Glass/epoxy composites are the safest materials to use in marine civil structures as mechanical properties degradation becomes stabilized after moisture saturation level. UV and water cyclic analysis must be done to determine affection to transversal strength. Only vinylester GFRP has problems with biodegradation. GFRP fatigue performance is not influenced by seawater environment

  18. Impact of Past Project on the Educational Experience of Civil Engineering Students

    Directory of Open Access Journals (Sweden)

    Leong Lau Teck

    2016-01-01

    Full Text Available Civil engineering lecturers need to develop effective early emphasis and educational challenges in order to prepare the current students with in-depth fundamental principles, applicable technical knowledge, and realistic appreciation on challenges faced by practicing civil engineers. In view of its importance, the use of past civil engineering projects as case studies have been integrated into the existing civil engineering curriculum at the University of Nottingham Malaysia Campus. In order to enhance our undergraduate students’ understanding, cognitive learning desire, and overall learning experience, an additional module has been incorporated in the past five years to investigate major past civil engineering projects. Students are free to choose any of past projects as their case studies and are required to find, sort, synthesize, and present critical elements that contributed to the overall success of the past projects in the form of discussion essays. In this paper, the universal consensus between the lecturers and the students on the effectiveness of past civil engineering projects as case studies to enhance students’ lifelong learning desire and aspiration towards ethical practice are investigated. The lecturers’ and students’ views on the extent of coverage of the key elements and the preferred disciplines from the past projects are furthermore evaluated. The outcomes indicate that the use of past projects as case studies enhanced students’ educational experiences that conduce for cognitive learning desires (73% of lecturers & 81% of students, motivated for future ethical practice (82% of lecturers & 86% of students, and reassured aspiration (100% of lecturers & 97% of students in becoming practicing civil engineers upon graduation. A common view derives from this study is that the curriculum needs to further its extent of coverage on the industry practices.

  19. 19 CFR 10.183 - Duty-free entry of civil aircraft, aircraft engines, ground flight simulators, parts, components...

    Science.gov (United States)

    2010-04-01

    ... Duty-free entry of civil aircraft, aircraft engines, ground flight simulators, parts, components, and... aircraft, aircraft engines, and ground flight simulators, including their parts, components, and... United States (HTSUS) by meeting the following requirements: (1) The aircraft, aircraft engines,...

  20. Political opportunity structures, democracy, and civil war

    NARCIS (Netherlands)

    K.S. Gleditsch; A. Ruggeri

    2010-01-01

    Theories of mobilization suggest that groups are more likely to resort to violence in the presence of political opportunity structures that afford greater prospects for extracting concessions from the government or better opportunities to topple ruling governments. However, existing efforts to consi

  1. Risk based design of civil structures

    NARCIS (Netherlands)

    Van Gelder, P.; Roos, A.; Vrijling, H.

    2001-01-01

    The Art and Science of Model Building: A Bayesian Approach, by Prof. A. Der Kiureghian; The talk will describe a Bayesian approach to developing models, with special emphasis on limit-state models for reinforced concrete structures. The formulation can incorporate all kinds of information (theoretic

  2. Fundamentals of civil engineering an introduction to the ASCE body of knowledge

    CERN Document Server

    McCuen, Richard H; Wong, Melanie K

    2011-01-01

    While the ASCE Body of Knowledge (BOK2) is the codified source for all technical and non-technical information necessary for those seeking to attain licensure in civil engineering, recent graduates have notoriously been lacking in the non-technical aspects even as they excel in the technical. Fundamentals of Civil Engineering: An Introduction to the ASCE Body of Knowledge addresses this shortfall and helps budding engineers develop the knowledge, skills, and attitudes suggested and implied by the BOK2. Written as a resource for all of the non-technical outcomes not specifically covered in the

  3. Computational mechanics in civil engineering (CMC). Fire - Heat transfer - Stress analysis

    NARCIS (Netherlands)

    Hendriks, M.A.N.; H¢iseth, K.V.; Hynne, T.; ¥verli, J.A.

    1999-01-01

    engineering, especially related to integrated analysis [1]. That is, analysis where two or more interacting effects or phenomena are analysed either staggered or simultaneously. CMC contains five main projects where frequently encountered problems in civil engineering will be treated by an integrate

  4. Boundaries - US Army Corps of Engineers - St. Paul District (MVP) Civil Works

    Data.gov (United States)

    Army Corps of Engineers, Department of the Army, Department of Defense — The US Army Corps of Engineers - St. Paul District Civil Works boundary. Boundary is based on 1:24k watershed data and coordination with MVR to determine shared...

  5. Current State of Numerical Simulations and Testing for the Blast and Impact Protection of the Build Civil Engineering Infrastructure

    Institute of Scientific and Technical Information of China (English)

    GEBBEKEN Norbert

    2006-01-01

    The identification of the critical infrastructure has shown that the build civil engineering infrastructure is almost involved everywhere,even with the IT-infrastructure.Therefore,the passive safety of structures is demanded.Security associations have analysed that most assaults came along with explosion and impact scenarios,which amount in 80% of assaults.Consequently,these are the extraordinary loads the structures have to be planned and designed for.To carry out such an engineering job,the engineer has to be educated in multiple disciplines as physics,material science,continuum mechanics,numerical mechanics,testing,structural engineering and related specific fields as wave propagation etc.In this paper we will concentrate on the subjects of numerical simulation and testing.

  6. Applications and issues of GIS as tool for civil engineering modeling

    Science.gov (United States)

    Miles, S.B.; Ho, C.L.

    1999-01-01

    A tool that has proliferated within civil engineering in recent years is geographic information systems (GIS). The goal of a tool is to supplement ability and knowledge that already exists, not to serve as a replacement for that which is lacking. To secure the benefits and avoid misuse of a burgeoning tool, engineers must understand the limitations, alternatives, and context of the tool. The common benefits of using GIS as a supplement to engineering modeling are summarized. Several brief case studies of GIS modeling applications are taken from popular civil engineering literature to demonstrate the wide use and varied implementation of GIS across the discipline. Drawing from the case studies, limitations regarding traditional GIS data models find the implementation of civil engineering models within current GIS are identified and countered by discussing the direction of the next generation of GIS. The paper concludes by highlighting the potential for the misuse of GIS in the context of engineering modeling and suggests that this potential can be reduced through education and awareness. The goal of this paper is to promote awareness of the issues related to GIS-based modeling and to assist in the formulation of questions regarding the application of current GIS. The technology has experienced much publicity of late, with many engineers being perhaps too excited about the usefulness of current GIS. An undoubtedly beneficial side effect of this, however, is that engineers are becoming more aware of GIS and, hopefully, the associated subtleties. Civil engineers must stay informed of GIS issues and progress, but more importantly, civil engineers must inform the GIS community to direct the technology development optimally.

  7. Consolidation on civil engineering and technical infrastructure at CERN from now to 2010

    CERN Document Server

    Alves, P; Pepinster, P; CERN. Geneva. ST Division

    2003-01-01

    The age of the civil engineering structure (office buildings, halls) and of tertiary technical equipment (mainly HVAC and electricity) at CERN is such that their renovation must be considered in the near future. Due to the large number of buildings and equipment in these conditions, and the restricted budget available, it is extremely important to define priorities. The aim of this note is to give the picture of the current conditions and the related problems, based on the backlog of CERN database (MP5) and confronting it with the inventory made at CERN by an external company. After having identified the most frequent problems and repairs to carry out, a planning for intervention is therefore presented optimizing the safety aspects, maintenance costs and comfort for the users. The timescale of this intervention is related to the money that will be available in the coming years.

  8. Advanced structural wind engineering

    CERN Document Server

    Kareem, Ahsan

    2013-01-01

    This book serves as a textbook for advanced courses as it introduces state-of-the-art information and the latest research results on diverse problems in the structural wind engineering field. The topics include wind climates, design wind speed estimation, bluff body aerodynamics and applications, wind-induced building responses, wind, gust factor approach, wind loads on components and cladding, debris impacts, wind loading codes and standards, computational tools and computational fluid dynamics techniques, habitability to building vibrations, damping in buildings, and suppression of wind-induced vibrations. Graduate students and expert engineers will find the book especially interesting and relevant to their research and work.

  9. Ageing management of french NPP civil work structures

    Directory of Open Access Journals (Sweden)

    Dauffer D.

    2011-04-01

    Full Text Available This paper presents EDF practice about concrete structure ageing management, from the mechanisms analysis to the formal procedure which allows the French company to increase 900 MWe NPP lifetime until 40 years; it will also introduce its action plan for 60 years lifetime extension. This practice is based on a methodology which identifies every ageing mechanism; both plants feedback and state of the art are screened and conclusions are drawn up into an “ageing analysis data sheet”. That leads at first to a collection of 57 data sheets which give the mechanism identification, the components that are concerned and an analysis grid which is designed to assess the safety risk. This analysis screens the reference documents describing the mechanism, the design lifetime hypotheses, the associated regulation or codification, the feedback experiences, the accessibility, the maintenance actions, the repair possibility and so one. This analysis has to lead to a conclusion about the risk taking into account monitoring and maintenance. If the data sheet conclusion is not clear enough, then a more detailed report is launched. The technical document which is needed, is a formal detailed report which summarizes every theoretical knowledge and monitoring data: its objective is to propose a solution for ageing management: this solution can include more inspections or specific research development, or additional maintenance. After a first stage on the 900 MWe units, only two generic ageing management detailed reports have been needed for the civil engineering part: one about reactor building containment, and one about other structures which focuses on concrete inflating reactions. The second stage consists on deriving this generic analysis (ageing mechanism and detailed reports to every plant where a complete ageing report is required (one report for all equipments and structures of the plant, but specific for each reactor. This ageing management is a

  10. Civil Engineering Applications of Ground Penetrating Radar: Research Perspectives in COST Action TU1208

    Science.gov (United States)

    Pajewski, Lara; Benedetto, Andrea; Loizos, Andreas; Slob, Evert; Tosti, Fabio

    2013-04-01

    Ground Penetrating Radar (GPR) is a safe, non-destructive and non-invasive imaging technique that can be effectively used for advanced inspection of composite structures and for diagnostics affecting the whole life-cycle of civil engineering works. GPR provides high resolution images of structures and subsurface through wide-band electromagnetic waves. It can be employed for the surveying of roads, pavements, bridges, tunnels, for detecting underground cavities and voids, for utility sensing, for the inspection of buildings, reinforced concrete and pre-cast concrete structures, for geotechnical investigation, in foundation design, as well as for several other purposes. Penetration and resolution of GPR depend primarily on the transmitting frequency of the equipment, the antenna characteristics, the electrical properties of the ground or of the surveyed material, and the contrasting electrical properties of the targets with respect to the surrounding medium. Generally there is a direct relationship between the transmitter frequency and the resolution that can be obtained; conversely there is an inverse relationship between frequency and penetration depth. GPR works best in dry ground environments, but can also give good results in wet, saturated materials; it does not work well in saline conditions, in high-conductivity media and through dense clays which limit signal penetration. Different approaches can be employed in the processing of collected GPR data. Once data have been processed, they still have to be analysed. This is a challenging problem, since interpretation of GPR radargrams is typically non-intuitive and considerable expertise is needed. In the presence of a complex scenario, an accurate electromagnetic forward solver is a fundamental tool for the validation of data interpretation. It can be employed for the characterization of scenarios, as a preliminary step that precedes a survey, or to gain a posteriori a better understanding of measured data. It

  11. ShakeNet: a portable wireless sensor network for instrumenting large civil structures

    Science.gov (United States)

    Kohler, Monica D.; Hao, Shuai; Mishra, Nilesh; Govindan, Ramesh; Nigbor, Robert

    2015-08-03

    We report our findings from a U.S. Geological Survey (USGS) National Earthquake Hazards Reduction Program-funded project to develop and test a wireless, portable, strong-motion network of up to 40 triaxial accelerometers for structural health monitoring. The overall goal of the project was to record ambient vibrations for several days from USGS-instrumented structures. Structural health monitoring has important applications in fields like civil engineering and the study of earthquakes. The emergence of wireless sensor networks provides a promising means to such applications. However, while most wireless sensor networks are still in the experimentation stage, very few take into consideration the realistic earthquake engineering application requirements. To collect comprehensive data for structural health monitoring for civil engineers, high-resolution vibration sensors and sufficient sampling rates should be adopted, which makes it challenging for current wireless sensor network technology in the following ways: processing capabilities, storage limit, and communication bandwidth. The wireless sensor network has to meet expectations set by wired sensor devices prevalent in the structural health monitoring community. For this project, we built and tested an application-realistic, commercially based, portable, wireless sensor network called ShakeNet for instrumentation of large civil structures, especially for buildings, bridges, or dams after earthquakes. Two to three people can deploy ShakeNet sensors within hours after an earthquake to measure the structural response of the building or bridge during aftershocks. ShakeNet involved the development of a new sensing platform (ShakeBox) running a software suite for networking, data collection, and monitoring. Deployments reported here on a tall building and a large dam were real-world tests of ShakeNet operation, and helped to refine both hardware and software. 

  12. Structural engineering masters level education framework of knowledge for the needs of initial professional practice

    Science.gov (United States)

    Balogh, Zsuzsa Enriko

    For at least the last decade, engineering, civil engineering, along with structural engineering as a profession within civil engineering, have and continue to face an emerging need for "Raising the Bar" of preparedness of young engineers seeking to become practicing professional engineers. The present consensus of the civil engineering profession is that the increasing need for broad and in-depth knowledge should require the young structural engineers to have at least a Masters-Level education. This study focuses on the Masters-Level preparedness in the structural engineering area within the civil engineering field. It follows much of the methodology used in the American Society of Civil Engineers (ASCE) Body of Knowledge determination for civil engineering and extends this type of study to better define the portion of the young engineers preparation beyond the undergraduate program for one specialty area of civil engineering. The objective of this research was to create a Framework of Knowledge for the young engineer which identifies and recognizes the needs of the profession, along with the profession's expectations of how those needs can be achieved in the graduate-level academic setting, in the practice environment, and through lifelong learning opportunities with an emphasis on the initial five years experience past completion of a Masters program in structural engineering. This study applied a modified Delphi method to obtain the critical information from members of the structural engineering profession. The results provide a Framework of Knowledge which will be useful to several groups seeking to better ensure the preparedness of the future young structural engineers at the Masters-Level.

  13. Self-monitoring fiber reinforced polymer strengthening system for civil engineering infrastructures

    Science.gov (United States)

    Jiang, Guoliang; Dawood, Mina; Peters, Kara; Rizkalla, Sami

    2008-03-01

    Fiber reinforced polymer (FRP) materials are currently used for strengthening civil engineering infrastructures. The strengthening system is dependant on the bond characteristics of the FRP to the external surface of the structure to be effective in resisting the applied loads. This paper presents an innovative self-monitoring FRP strengthening system. The system consists of two components which can be embedded in FRP materials to monitor the global and local behavior of the strengthened structure respectively. The first component of the system is designed to evaluate the applied load acting on a structure based on elongation of the FRP layer along the entire span of the structure. Success of the global system has been demonstrated using a full-scale prestressed concrete bridge girder which was loaded up to failure. The test results indicate that this type of sensor can be used to accurately determine the load prior to failure within 15 percent of the measured value. The second sensor component consists of fiber Bragg grating sensors. The sensors were used to monitor the behavior of steel double-lap shear splices tested under tensile loading up to failure. The measurements were used to identify abnormal structural behavior such as epoxy cracking and FRP debonding. Test results were also compared to numerical values obtained from a three dimensional shear-lag model which was developed to predict the sensor response.

  14. Safety engineering in handling fuels and lubricants in civil aviation

    Science.gov (United States)

    Protoereiskii, Aleksandr Stepanovich

    The book is concerned with methods of improving working conditions, work hygiene, safety engineering, and fire and explosion prevention during the storage and handling of petroleum products at fuel and lubricant storage facilities. The discussion covers methods of protection against static and atmospheric discharges, lightning protection, safety engineering in fuel and lubricant laboratories, and methods of fire prevention and fire extinction. Attention is also given to methods for administering first aid in case of accidents and poisoning.

  15. Utilization of electromigration in civil and environmental engineering - Processes, transport rates and matrix changes

    DEFF Research Database (Denmark)

    Ottosen, Lisbeth M.; Christensen, Iben Vernegren; Rörig-Dalgaard, Inge;

    2008-01-01

    Electromigration (movement of ions in an applied electric field) is utilized for supply or extraction of ions from various porous materials within both civil and environmental engineering. In civil engineering, most research has been conducted on the removal of chlorides from concrete to hinder...... reinforcement corrosion while in environmental engineering remediation of heavy metal polluted soil is the issue most studied. Never the less, experiments have been conducted with utilization for several other materials and purposes within both engineering fields. Even though there are many topics of common...... interest in the use of electromigration for the two fields, there is no tradition for collaboration. The present paper is a review with the aim of pointing out areas of shared interest. Focus is laid on the purposes of the different processes, transport rates of various ions in different materials...

  16. 75 FR 2463 - Continuing Contract for Civil Works Project Managed by the United States Army Corps of Engineers...

    Science.gov (United States)

    2010-01-15

    ... Corps of Engineers, may be used in solicitations and contracts for civil works water resource projects... Department of the Army 48 CFR Parts 5132, 5136, and 5152 RIN 0710-AA69 Continuing Contract for Civil Works Project Managed by the United States Army Corps of Engineers Clauses AGENCY: U.S. Army Corps of...

  17. CIVIL ENGINEERING TECHNOLOGY CONSULTANTS' WORKSHOP, REPORT OF PROCEEDINGS (ATLANTA, MAY 17-20, 1967).

    Science.gov (United States)

    DOBROVOLNY, JERRY S.

    THIS REPORT ATTEMPTS TO SHOW ADMINISTRATORS OF JUNIOR COLLEGES, TECHNICAL INSTITUTES, AND GOVERNMENT OR INDUSTRIAL TRAINING PROGRAMS CERTAIN CRITICAL PROBLEMS IN THE TRAINING OF CIVIL ENGINEERING TECHNICIANS. THE PHILOSOPHY OF TECHNICAL EDUCATION REQUIRES ATTENTION AS DOES THE IDENTIFICATION OF STUDENTS WHO CAN BENEFIT FROM AND SUCCESSFULLY…

  18. Assessment by Employers of Newly Graduated Civil Engineers from the Islamic University of Gaza

    Science.gov (United States)

    Enshassi, Adnan; Hassouna, Ahmed

    2005-01-01

    The evaluation process is very important to identify and recognize the strengths and the weaknesses of graduated students. The purpose of this paper is to evaluate the performance of the newly graduated civil engineers from the Islamic University of Gaza in Palestine. The methodology was based on questionnaires and informal interview. The…

  19. Report for Working Group 1: Design Research in Civil and Environmental Engineering

    DEFF Research Database (Denmark)

    Thompson, Mary Kathryn; Paradisi, Irene

    2013-01-01

    The first 2013 DCEE working group meeting focused on issues associated with design research in civil and environmental engineering. It addressed some of the motivation for establishing design as a research discipline in CEE and some of the challenges and outstanding questions about how to do so....

  20. Non-destructive testing in civil engineering (NDT-CE). Vol. 2. Posters

    Energy Technology Data Exchange (ETDEWEB)

    Schickert, G. [ed.; Wiggenhauser, H. [ed.

    1995-12-31

    This volume contains about more than 80 posters which were presented at the International Symposium on Non-Destructive Testing in Civil Engineering from September 26 to 28, 1995 in Berlin. The topics on NDT methods are: Acoustic emission, impact echo; Building dynamics, soils; Case studies; IR-thermography; Material properties; Moisture; Monitoring, sensors; Radar, electromagnetic methods; Reinforcements, corrosion; Ultrasonics; Special interest. (MM) (MM)

  1. Free Fall Misconceptions: Results of a Graph Based Pre-Test of Sophomore Civil Engineering Students

    Science.gov (United States)

    Montecinos, Alicia M.

    2014-01-01

    A partially unusual behaviour was found among 14 sophomore students of civil engineering who took a pre test for a free fall laboratory session, in the context of a general mechanics course. An analysis contemplating mathematics models and physics models consistency was made. In all cases, the students presented evidence favoring a correct free…

  2. Information management in civil engineering infrastructural development: with focus on geological and geotechnical information

    NARCIS (Netherlands)

    Tegtmeier, W.; Zlatanova, S.; Van Oosterom, P.J.M.; Hack, H.R.G.K.

    2009-01-01

    In civil engineering infrastructural projects, information exchange and (re-) use in and between involved parties is difficult. This is mainly caused by a lack of information harmonization. Various specialists are working together on the development of an infrastructural project and are all using th

  3. Assessing efficiency of road contracts can lead to less risk, more innovation says civil engineer

    OpenAIRE

    Nystrom, Lynn A.

    2008-01-01

    The most recent survey of the nation's highway infrastructure, conducted by the American Society of Civil Engineers in 2005, indicated that the U.S. road system is in poor condition, a marked contrast from the 1988 survey by the National Council on Public Works Improvement. At that time, the nation's roads were cited to be in better than fair condition.

  4. Air Force Institute of Technology, Civil Engineering School: Environmental Protection Course.

    Science.gov (United States)

    Air Force Inst. of Tech., Wright-Patterson AFB, OH. School of Engineering.

    This document contains information assembled by the Civil Engineering School to meet the initial requirements of NEPA 1969 and Executive Orders which required the Air Force to implement an effective environmental protection program. This course presents the various aspects of Air Force environmental protection problems which military personnel…

  5. A Sustainable Cohort of Professional Civil Engineering Graduates? Uncovering the United Kingdom Graduate Crisis

    Science.gov (United States)

    Edwards, David J.; Dainty, Andrew R. J.; Love, Peter E. D.

    2004-01-01

    Undergraduate applications to civil engineering courses have been declining at an alarming rate despite the industry's healthy economic activity. Concerns abound as to the long-term impact of this decline as the sector is already suffering skills shortages across virtually all of its occupations. This paper investigates the likely future trends in…

  6. Case Study of a Project-Based Learning Course in Civil Engineering Design

    Science.gov (United States)

    Gavin, K.

    2011-01-01

    This paper describes the use of project-based learning to teach design skills to civil engineering students at University College Dublin (UCD). The paper first considers the development of problem-based leaning (PBL) as a tool in higher education. The general issues to be considered in the design of the curriculum for a PBL module are reviewed.…

  7. The Attitude of Civil Engineering Students towards Health and Safety Risk Management: A Case Study

    Science.gov (United States)

    Petersen, A. K.; Reynolds, J. H.; Ng, L. W. T.

    2008-01-01

    The highest rate of accidents and injuries in British industries has been reported by the construction industry during the past decade. Since then stakeholders have recognised that a possible solution would be to inculcate a good attitude towards health and safety risk management in undergraduate civil engineering students and construction…

  8. COST Action TU1208 "Civil Engineering Applications of Ground Penetrating Radar": ongoing research activities and third-year results

    Science.gov (United States)

    Pajewski, Lara; Benedetto, Andrea; Loizos, Andreas; Tosti, Fabio

    2016-04-01

    This work aims at disseminating the ongoing research activities and third-year results of the COST (European COoperation in Science and Technology) Action TU1208 "Civil Engineering Applications of Ground Penetrating Radar." About 350 experts are participating to the Action, from 28 COST Countries (Austria, Belgium, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Malta, Macedonia, The Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom), and from Albania, Armenia, Australia, Colombia, Egypt, Hong Kong, Jordan, Israel, Philippines, Russia, Rwanda, Ukraine, and United States of America. In September 2014, TU1208 has been recognised among the running Actions as "COST Success Story" ("The Cities of Tomorrow: The Challenges of Horizon 2020," September 17-19, 2014, Torino, IT - A COST strategic workshop on the development and needs of the European cities). The principal goal of the COST Action TU1208 is to exchange and increase scientific-technical knowledge and experience of GPR techniques in civil engineering, whilst simultaneously promoting throughout Europe the effective use of this safe and non-destructive technique in the monitoring of infrastructures and structures. Moreover, the Action is oriented to the following specific objectives and expected deliverables: (i) coordinating European scientists to highlight problems, merits and limits of current GPR systems; (ii) developing innovative protocols and guidelines, which will be published in a handbook and constitute a basis for European standards, for an effective GPR application in civil- engineering tasks; safety, economic and financial criteria will be integrated within the protocols; (iii) integrating competences for the improvement and merging of electromagnetic scattering techniques and of data- processing techniques; this will lead to a novel freeware tool for the localization of

  9. Linking Civil Engineering Education And Research With Industry (Session Keynote)

    DEFF Research Database (Denmark)

    Virdi, Kuldeep

    Linking engineering education with industry has been a basic aim of educators almost from the beginning of modern degree programmes. In the USA, reference is often made to ‘co-operative education’, where students spend periods in industry within the duration of their stay in a university. Indeed...

  10. Measured Engine Installation Effects of Four Civil Transport Airplanes

    Science.gov (United States)

    Senzig, David A.; Fleming, Gregg G.; Shepherd, Kevin P.

    2001-01-01

    The Federal Aviation Administration's Integrated Noise Model (INM) is one of the primary tools for land use planning around airports. The INM currently calculates airplane noise lateral attenuation using the methods contained in the Society of Automotive Engineer's Aerospace Information Report No. 1751 (SAE AIR 1751). Researchers have noted that improved lateral attenuation algorithms may improve airplane noise prediction. The authors of SAE AIR 1751 based existing methods on empirical data collected from flight tests using 1960s-technology airplanes with tail-mounted engines. To determine whether the SAE AIR 1751 methods are applicable for predicting the engine installation component of lateral attenuation for airplanes with wing-mounted engines, the National Aeronautics and Space Administration (NASA) sponsored a series of flight tests during September 2000 at their Wallops Flight Facility. Four airplanes, a Boeing 767-400, a Douglas DC-9, a Dassault Falcon 2000, and a Beech KingAir, were flown through a 20 microphone array. The airplanes were flown through the array at various power settings, flap settings, and altitudes to simulate take-off and arrival configurations. This paper presents the preliminary findings of this study.

  11. Landsat 8 Multispectral and Pansharpened Imagery Processing on the Study of Civil Engineering Issues

    Science.gov (United States)

    Lazaridou, M. A.; Karagianni, A. Ch.

    2016-06-01

    Scientific and professional interests of civil engineering mainly include structures, hydraulics, geotechnical engineering, environment, and transportation issues. Topics included in the context of the above may concern urban environment issues, urban planning, hydrological modelling, study of hazards and road construction. Land cover information contributes significantly on the study of the above subjects. Land cover information can be acquired effectively by visual image interpretation of satellite imagery or after applying enhancement routines and also by imagery classification. The Landsat Data Continuity Mission (LDCM - Landsat 8) is the latest satellite in Landsat series, launched in February 2013. Landsat 8 medium spatial resolution multispectral imagery presents particular interest in extracting land cover, because of the fine spectral resolution, the radiometric quantization of 12bits, the capability of merging the high resolution panchromatic band of 15 meters with multispectral imagery of 30 meters as well as the policy of free data. In this paper, Landsat 8 multispectral and panchromatic imageries are being used, concerning surroundings of a lake in north-western Greece. Land cover information is extracted, using suitable digital image processing software. The rich spectral context of the multispectral image is combined with the high spatial resolution of the panchromatic image, applying image fusion - pansharpening, facilitating in this way visual image interpretation to delineate land cover. Further processing concerns supervised image classification. The classification of pansharpened image preceded multispectral image classification. Corresponding comparative considerations are also presented.

  12. Proceedings [of the] 1994 annual conference [of the] Canadian Society for Civil Engineering. Comptes rendus [du] congres annuel 1994 [de la] Societe Canadienne de Genie Civil

    Energy Technology Data Exchange (ETDEWEB)

    1994-01-01

    The third of four volumes of a conference on civil engineering presented papers on environmental engineering, including water and wastewater treatment, water quality management, solid and liquid waste treatment, non-point source pollution and hydraulics, urban drainage problems, and soil and groundwater contamination. Separate abstracts have been prepared for 6 papers from the volume.

  13. Structural Health Monitoring of Civil Infrastructure Using Optical Fiber Sensing Technology: A Comprehensive Review

    Directory of Open Access Journals (Sweden)

    X. W. Ye

    2014-01-01

    Full Text Available In the last two decades, a significant number of innovative sensing systems based on optical fiber sensors have been exploited in the engineering community due to their inherent distinctive advantages such as small size, light weight, immunity to electromagnetic interference (EMI and corrosion, and embedding capability. A lot of optical fiber sensor-based monitoring systems have been developed for continuous measurement and real-time assessment of diversified engineering structures such as bridges, buildings, tunnels, pipelines, wind turbines, railway infrastructure, and geotechnical structures. The purpose of this review article is devoted to presenting a summary of the basic principles of various optical fiber sensors, innovation in sensing and computational methodologies, development of novel optical fiber sensors, and the practical application status of the optical fiber sensing technology in structural health monitoring (SHM of civil infrastructure.

  14. [Civil engineering education at the Imperial College of Engineering in Tokyo: an analysis based on Ayahiko Ishibashi's memoirs].

    Science.gov (United States)

    Wada, Masanori

    2014-01-01

    The Imperial College of Engineering (ICE or Kobu-Daigakko) in Tokyo, founded in 1873 under the auspices of the Ministry of Public Works, was one of the most prominent modern institutions of engineering education in early Meiji Japan. Previous studies have revealed that the ICE offered large scale practical training programs at enterprises of the Ministry, which sometimes lasted several months, and praised their ideal combination of theory and practice. In reality, it has been difficult to evaluate the quality of education at the ICE mainly because of scarcity of sources. ICE students published a collection of memoirs for alumni members, commemorating the fiftieth-year of the history of the Tokyo Imperial University. Drawing on the previously neglected collection of students' memoires, this paper appraises the education of civil engineering offered by the ICE. The paper also compares this collection with other official records of the college, and confirms it as a reliable source, even though it contains some minor errors. The author particularly uses the memoirs by Ayahiko Ishibashi, one of the first graduates from its civil engineering course, who left sufficient reminiscences on education that he received. This paper, as a result, illustrates that the main practical training for the students of civil engineering was limited to designing process, including surveying. Furthermore, practical training that Ishibashi received at those enterprises often lacked a plan, and its effectiveness was questionable.

  15. Challenges and Opportunities for Establishing Design as a Research Discipline in Civil and Environmental Engineering

    DEFF Research Database (Denmark)

    Thompson, Mary Kathryn

    2013-01-01

    faculty, research and education communities, conferences, and journals. However, design remains an emerging sub-discipline in civil and environmental engineering – practiced, valued, and taught but not subject to rigorous academic research. This paper presents some of the challenges associated...... with the establishment of design as a research discipline within civil and environmental engineering, some of the benefits and opportunities that will come from that establishment, and some evidence for the fact that this process has already begun.......There are a number of fields including architecture, industrial design, and urban planning and design, where design is the discipline upon which all research and teaching activities are based. In other fields such as aerospace and mechanical engineering, design is a sub-discipline with its own...

  16. Investigation of low NOx staged combustor concept in high-speed civil transport engines

    Science.gov (United States)

    Nguyen, Hung Lee; Bittker, David A.; Niedzwiecki, Richard W.

    1989-01-01

    Levels of exhaust emissions due to high temperatures in the main combustor of high-speed civil transport (HSCT) engines during supersonic cruise are predicted. These predictions are based on a new combustor design approach: a rich burn/quick quench/lean burn combustor. A two-stage stirred reactor model is used to calculate the combustion efficiency and exhaust emissions of this novel combustor. A propane-air chemical kinetics model is used to simulate the fuel-rich combustion of jet fuel. Predicted engine exhaust emissions are compared with available experimental test data. The effect of HSCT engine operating conditions on the levels of exhaust emissions is also presented. The work described in this paper is a part of the NASA Lewis Research Center High-Speed Civil Transport Low NO(x) Combustor program.

  17. Perceptions of Academic Staff towards Accommodating Students with Disabilities in a Civil Engineering Undergraduate Program in a University in South Africa

    Science.gov (United States)

    Mayat, Nafisa; Amosun, Seyi Ladele

    2011-01-01

    This study explored the perceptions of academic staff towards admission of students with disabilities, and their accommodation once accepted into an undergraduate Civil Engineering program in a South African university. Qualitative responses relating to the perceptions of five academic staff were obtained through semi-structured interviews. The…

  18. Mechanical and materials engineering of modern structure and component design

    CERN Document Server

    Altenbach, Holm

    2015-01-01

    This book presents the latest findings on mechanical and materials engineering as applied to the design of modern engineering materials and components. The contributions cover the classical fields of mechanical, civil and materials engineering, as well as bioengineering and advanced materials processing and optimization. The materials and structures discussed can be categorized into modern steels, aluminium and titanium alloys, polymers/composite materials, biological and natural materials, material hybrids and modern nano-based materials. Analytical modelling, numerical simulation, state-of-the-art design tools and advanced experimental techniques are applied to characterize the materials’ performance and to design and optimize structures in different fields of engineering applications.

  19. Fuzzy randomness uncertainty in civil engineering and computational mechanics

    CERN Document Server

    Möller, Bernd

    2004-01-01

    This book, for the first time, provides a coherent, overall concept for taking account of uncertainty in the analysis, the safety assessment, and the design of structures. The reader is introduced to the problem of uncertainty modeling and familiarized with particular uncertainty models. For simultaneously considering stochastic and non-stochastic uncertainty the superordinated uncertainty model fuzzy randomness, which contains real valued random variables as well as fuzzy variables as special cases, is presented. For this purpose basic mathematical knowledge concerning the fuzzy set theory and the theory of fuzzy random variables is imparted. The body of the book comprises the appropriate quantification of uncertain structural parameters, the fuzzy and fuzzy probabilistic structural analysis, the fuzzy probabilistic safety assessment, and the fuzzy cluster structural design. The completely new algorithms are described in detail and illustrated by way of demonstrative examples.

  20. Multi-Sensing system for outdoor thermal monitoring: Application to large scale civil engineering components

    Science.gov (United States)

    Crinière, Antoine; Dumoulin, Jean; Manceau, Jean-Luc; Perez, Laetitia; Bourquin, Frederic

    2014-05-01

    Aging of transport infrastructures combined with traffic and climatic solicitations contribute to the reduction of their performances. To address and quantify the resilience of civil engineering structure, investigations on robust, fast and efficient methods are required. Among research works carried out at IFSTTAR, methods for long term monitoring face an increasing demand. Such works take benefits of this last decade technological progresses in ICT domain. The present study follows the ISTIMES European project [1], which aimed at demonstrate the ability of different electromagnetic sensing techniques, processing methods and ICT architecture, to be used for long term monitoring of critical transport infrastructures. Thanks to this project a multi-sensing techniques system, able to date and synchronize measurements carried out by infrared thermography coupled with various measurements data (i.e. weather parameters), have been designed, developed and implemented on real site [2]. Among experiments carried out on real transport infrastructure, it has been shown, for the "Musmesci" bridge deck (Italy), that by using infrared thermal image sequence with weather measurements during sevral days it was possible to develop analysis methods able to produce qualitative and quantitative data [3]. In the present study, added functionalities were designed and added to the "IrLAW" system in order to reach full autonomy in term of power supply, very long term measurement capability (at least 1 year) and automated data base feeding. The surveyed civil engineering structures consist in two concrete beams of 16 m long and 21 T weight each. One of the two beams was damage by high energy mechanical impact at the IFSTTAR falling rocks test station facilities located in the French Alpes [4]. The system is composed of one IR uncooled microbolometric camera (FLIR SC325) with a 320X240 Focal Plane Array detector in band III, a weather station VAISALA WXT520, a GPS, a failover power supply

  1. Hybrid structure in civil engineering construction. Recent examples of composite structures of railways; Doboku bun`ya ni okeru fukugo kozo. Tetsudo ni okeru saikin no fukugo kozo no tekiyo rei

    Energy Technology Data Exchange (ETDEWEB)

    Tsuyoshi, T.; Yamauchi, T.; Takano, H. [East Japan Railway Co., Tokyo (Japan); Kurihara, H.

    1995-03-30

    With priority given to the multistory work of the Chuo (central) Line now under construction at the Tokyo Station, applied cases of composite structures to railroads are reported. The Chuo Line is scheduled to run on a viaduct. The experiment performed in relation to the application of RC columns wound by steel pipes with high density reinforcement bars and the outline of the design and execution of works are described. The outline of the design and execution of works of rigidly framed R9 block including bridge is given together with report on the experiments, design, and execution of works. The tensile stress of the cross section of steel pipes used on the outside of members is designed to be born by reinforcement bars. The overbridge in the yard of the Kinshicho Station crosses the Station under the railroad track in the north-south direction. Steel is used for the elements above the ridge frame columns, and RC composite structure is employed for parts lower than the footing. At the new Kamishiki Station in the Musashino Line, embankment is removed to construct the viaduct while trains are running on the line at the same time. Night works are decreased, terms of works are shortened, efficient and safe operation become possible, but columns and beams are required to be constructed under the ground. 8 refs., 27 figs., 3 tabs.

  2. A new experience: the course of ethics in engineering in the Department of Civil Engineering, University of Granada.

    Science.gov (United States)

    Gil-Martín, Luisa María; Hernández-Montes, Enrique; Segura-Naya, Armando

    2010-06-01

    A course in professional ethics for civil engineers was taught for the first time in Spain during the academic year 2007/08. In this paper a survey on the satisfaction and expectation of the course is presented. Surprisingly the students sought moral and ethical principles for their own ordinary lives as well as for their profession. Students were concerned about the law, but in their actions they were more concerned with their conscience, aware that it can be separate from the law.

  3. Utilization of washery waste as secondary raw materials in civil engineering and other industries

    Energy Technology Data Exchange (ETDEWEB)

    Leonhard, J.; Schieder, T.

    1990-02-01

    Specific demands are put on waste from hardcoal production when used as a substitute for scarcening conventional construction materials such as sand, gravel and road stone. Untreated washery refuse is not useful, in general, except as bulk material for subsoil improvement as well as for the construction of embankments and dikes. By subjecting minestone to appropriate mechanical or thermal treatment aggregates it to serve as construction materials in civil engineering and in other industries can be obtained. Face bricks, compact and perforated blocks as well as large hollow blocks either with a calcareous or a cement binder were manufactured for civil engineering. Crushed coarse minestone proved its usefulness as a concrete aggregate. Utilization of ashes from fluidized bed firing systems yielded construction materials whose low density made them particularly fit for thermal insulation pruposes.

  4. Advanced spatio-temporal filtering techniques for photogrammetric image sequence analysis in civil engineering material testing

    Science.gov (United States)

    Liebold, F.; Maas, H.-G.

    2016-01-01

    The paper shows advanced spatial, temporal and spatio-temporal filtering techniques which may be used to reduce noise effects in photogrammetric image sequence analysis tasks and tools. As a practical example, the techniques are validated in a photogrammetric spatio-temporal crack detection and analysis tool applied in load tests in civil engineering material testing. The load test technique is based on monocular image sequences of a test object under varying load conditions. The first image of a sequence is defined as a reference image under zero load, wherein interest points are determined and connected in a triangular irregular network structure. For each epoch, these triangles are compared to the reference image triangles to search for deformations. The result of the feature point tracking and triangle comparison process is a spatio-temporally resolved strain value field, wherein cracks can be detected, located and measured via local discrepancies. The strains can be visualized as a color-coded map. In order to improve the measuring system and to reduce noise, the strain values of each triangle must be treated in a filtering process. The paper shows the results of various filter techniques in the spatial and in the temporal domain as well as spatio-temporal filtering techniques applied to these data. The best results were obtained by a bilateral filter in the spatial domain and by a spatio-temporal EOF (empirical orthogonal function) filtering technique.

  5. Polymer adhesives in civil engineering : effect of environmental parameters on thermomechanical properties

    OpenAIRE

    BENZARTI, K; Pastor, M.; CHAUSSADENT, T; THAVEAU, MP

    2002-01-01

    In this work, aging of two ambient curing thermoset polymers (an epoxy system and a plyester based mortar), commonly used for civil engineering applications, has been investigated. In a first part, microstructural evolutions of the adhesives in a standard environment (50% relative humidity, 20°C) were studied. The polymerization kinetics of the epoxy system was monitored by infrared spectroscopy and differential scanning calorimetry (DSC). These experiments showed that the crosslinking proces...

  6. Virtual Placements to Develop Employability Skills for Civil and Environmental Engineering Students

    OpenAIRE

    Parneet Paul

    2015-01-01

    This project work addresses the crucial need to encourage undergraduate civil and environmental engineering students to gain employment skills and training right from the start of their studies so that their overall employability increases; their confidence level in networking with industry and within the workplace increases; and so that they are successfully able to obtain employment after finishing their studies. This initiative is a stepping-stone employability exercise which focuses sp...

  7. Web-based Peer Assessment: A Case Study with Civil Engineering Students

    OpenAIRE

    Gonçalo Cruz; Caroline Dominguez; Ana Maia; Daniela Pedrosa; Gordon Grams

    2013-01-01

    Peer-assessed online collaborative writing is of growing importance for higher education. Based on the quantitative and qualitative analysis of collected data, this work presents the results of a case study in a graduate civil engineering course at the University of Trás-os-Montes e Alto Douro, Vila Real, Portugal. After an overall presentation of the learning activity, it examines students’ attitudes towards web-based peer assessment and identifies which factors are rela...

  8. Chemical characterisation of dredged sediments in relation to their potential use in civil engineering.

    Science.gov (United States)

    Zuliani, Tea; Mladenovič, Ana; Ščančar, Janez; Milačič, Radmila

    2016-04-01

    During capital and/or maintenance dredging operations, large amounts of material are produced. Instead of their discharge, dredged sediments may be a valuable natural resource if not contaminated. One of the possible areas of application is civil engineering. In the present work, the environmental status of seaport dredged sediment was evaluated in order to investigate its potential applicability as a secondary raw material. Sediments were analysed for element concentrations in digested samples, aqueous extracts and fractions from sequential extraction; for fluoride, chloride and sulphate concentrations in aqueous extracts; and for tributyltin (TBT). Granulometric and mineralogical compositions were also analysed. The elemental impact was evaluated by calculation of the enrichment factors. The total element concentrations determined showed moderate contamination of the dredged sediments as was confirmed also by their moderate enrichment factors, presumably as a result of industrial and port activities. Elemental concentrations in the aqueous extract were very low and therefore do not represent any hazard for the environment. The water-soluble element concentrations were under the threshold levels set by the EU Directive on the landfill of waste, on the basis of which the applicability of dredged sediments in civil engineering is evaluated, while the content of chloride and sulphate were above the threshold levels. It was found out that due to the large amounts of sediment available, civil engineering applications such as the construction of embankments and backfilling is the most beneficial recycling solution at present.

  9. Defining Gas Turbine Engine Performance Requirements for the Large Civil TiltRotor (LCTR2)

    Science.gov (United States)

    Snyder, Christopher A.

    2013-01-01

    Defining specific engine requirements is a critical part of identifying technologies and operational models for potential future rotary wing vehicles. NASA's Fundamental Aeronautics Program, Subsonic Rotary Wing Project has identified the Large Civil TiltRotor (LCTR) as the configuration to best meet technology goals. This notional vehicle concept has evolved with more clearly defined mission and operational requirements to the LCTR-iteration 2 (LCTR2). This paper reports on efforts to further review and refine the LCTR2 analyses to ascertain specific engine requirements and propulsion sizing criteria. The baseline mission and other design or operational requirements are reviewed. Analysis tools are described to help understand their interactions and underlying assumptions. Various design and operational conditions are presented and explained for their contribution to defining operational and engine requirements. These identified engine requirements are discussed to suggest which are most critical to the engine sizing and operation. The most-critical engine requirements are compared to in-house NASA engine simulations to try to ascertain which operational requirements define engine requirements versus points within the available engine operational capability. Finally, results are summarized with suggestions for future efforts to improve analysis capabilities, and better define and refine mission and operational requirements.

  10. Analysis of the acquired subject-specific competences at the university studies of civil engineering in communal course

    OpenAIRE

    Leban, Kaja

    2015-01-01

    The purpose of the thesis is to analyze the acquired subject-specific competences at the study of university level of civil engineering – communal course. We are interested in particular if the subject-specific competences which the graduates acquire are appropriate, have enough depth and if they meet their expectations and also meet the demands and expectations of the job market. The assumed working hypothesis is that graduates at the university level of civil engineering – communal course –...

  11. 工民建结构加固设计研究%Research on Design of Civil Structure Reinforcement

    Institute of Scientific and Technical Information of China (English)

    蒋乐聚

    2015-01-01

    Thi s paper on the building structure reinforcement theory are outlined, and to civil engineering reinforcement design and construction of steel reinforcement method and related issues were studied.%本文对建筑结构加固理论进行了概述,并对工民建的加固设计和钢结构加固方法及相关问题进行了研究。

  12. Computational structural mechanics for engine structures

    Science.gov (United States)

    Chamis, C. C.

    1989-01-01

    The computational structural mechanics (CSM) program at Lewis encompasses: (1) fundamental aspects for formulating and solving structural mechanics problems, and (2) development of integrated software systems to computationally simulate the performance/durability/life of engine structures. It is structured to mainly supplement, complement, and whenever possible replace, costly experimental efforts which are unavoidable during engineering research and development programs. Specific objectives include: investigate unique advantages of parallel and multiprocesses for: reformulating/solving structural mechanics and formulating/solving multidisciplinary mechanics and develop integrated structural system computational simulators for: predicting structural performances, evaluating newly developed methods, and for identifying and prioritizing improved/missing methods needed. Herein the CSM program is summarized with emphasis on the Engine Structures Computational Simulator (ESCS). Typical results obtained using ESCS are described to illustrate its versatility.

  13. The science of structural engineering

    CERN Document Server

    Heyman, Jacques

    1999-01-01

    Structures cannot be created without engineering theory, and design rules have existed from the earliest times for building Greek temples, Roman aqueducts and Gothic cathedrals - and later, for steel skyscrapers and the frames for aircraft. This book is, however, not concerned with the description of historical feats, but with the way the structural engineer sets about his business. Galileo, in the seventeenth century, was the first to introduce recognizably modern science into the calculation of structures; he determined the breaking strength of beams. In the eighteenth century engineers move

  14. News in engineering education in Spain effective from 2010 in presence of external changes and mixed crisis, looking mostly to agro and civil engineers.

    OpenAIRE

    Antón Corrales, José Manuel; Grau Olive, Juan Bautista; Tarquis Alfonso, Ana Maria; Andina de la Fuente, Diego; Sanchez Oreja, Maria Elena

    2012-01-01

    The engineering careers models were diverse in Europe, and are adopting now in Spain the Bolonia process for European Universities. Separated from older Universities, that are in part technically active, Civil Engineering (Caminos, Canales y Puertos) started at end of 18th century in Spain adopting the French models of Upper Schools for state civil servants with exam at entry. After 1800 intense wars, to conserve forest regions Ingenieros de Montes appeared as Upper School, and in 1855 also t...

  15. Exploring Advanced Technology Gas Turbine Engine Design and Performance for the Large Civil Tiltrotor (LCTR)

    Science.gov (United States)

    Snyder, Christopher A.

    2014-01-01

    A Large Civil Tiltrotor (LCTR) conceptual design was developed as part of the NASA Heavy Lift Rotorcraft Systems Investigation in order to establish a consistent basis for evaluating the benefits of advanced technology for large tiltrotors. The concept has since evolved into the second-generation LCTR2, designed to carry 90 passengers for 1,000 nautical miles at 300 knots, with vertical takeoff and landing capability. This paper explores gas turbine component performance and cycle parameters to quantify performance gains possible for additional improvements in component and material performance beyond those identified in previous LCTR2 propulsion studies and to identify additional research areas. The vehicle-level characteristics from this advanced technology generation 2 propulsion architecture will help set performance levels as additional propulsion and power systems are conceived to meet ever-increasing requirements for mobility and comfort, while reducing energy use, cost, noise and emissions. The Large Civil Tiltrotor vehicle and mission will be discussed as a starting point for this effort. A few, relevant engine and component technology studies, including previous LCTR2 engine study results will be summarized to help orient the reader on gas turbine engine architecture, performance and limitations. Study assumptions and methodology used to explore engine design and performance, as well as assess vehicle sizing and mission performance will then be discussed. Individual performance for present and advanced engines, as well as engine performance effects on overall vehicle size and mission fuel usage, will be given. All results will be summarized to facilitate understanding the importance and interaction of various component and system performance on overall vehicle characteristics.

  16. Evaluation of GPR techniques for civil-engineering applications: study on a test site

    Science.gov (United States)

    Grandjean, G.; Gourry, J. C.; Bitri, A.

    2000-10-01

    Different ground-penetrating radar (GPR) techniques have been tested on the same site in order to establish the performance and reliability of this method when applied to civil-engineering problems. The Laboratoire Central des Ponts et Chaussées (LCPC) test site at Nantes, France, was selected because it includes most of the underground heterogeneities commonly found in urban contexts, such as pipes, small voids, etc. The GPR survey consisted in recording measurements in tomographic (surface to horizontal borehole measurements), monostatic (2D surface profiling) and bistatic (Common Mid Point [CMP]) modes above various buried heterogeneities. Different processing techniques were also performed, such as tomographic inversion, 2D and 3D migration, velocity analysis, as well as numerical simulations, the results of which can be summarized in three points. (1) Although the different filling materials of the site can be distinguished by velocity and attenuation tomography, the buried heterogeneities are more difficult to identify because of limited resolution related to angular aperture and Fresnel zone. (2) 2D surface profiling can detect the different shallow heterogeneities, such as pipes and voids, down to a depth of several meters. Additional processing, such as forward modeling and attenuation curve analysis, provides more quantitative information related to the medium. A comparison between 2D and 3D migrated data highlights the error introduced when the structures are considered to be perfectly cylindrical. (3) CMP analysis gives relatively good estimations of vertical velocity contrasts when the medium is layered. A lithologic log can be derived assuming that the velocity changes are related to material variations.

  17. Embedded and surface-mounted fiber optic sensors for civil structural monitoring

    Science.gov (United States)

    Inaudi, Daniele; Casanova, Nicoletta; Kronenberg, Pascal; Marazzi, Silvio; Vurpillot, Samuel

    1997-05-01

    Civil structural monitoring by optical fiber sensors, require the development of reliable sensors that can be embedded or surface mounted in concrete, mortars, steel, timber and other construction materials as well as in rocks, soils and road pavements. These sensors should be rapid and simple to install in order to avoid any interference with the building site schedule and not to require specialized operators to accomplish the task. The sensors have to be rugged enough to withstand the harsh conditions typically found in civil engineering including, dust, moisture, shocks, EM disturbances and unskilled workman. It is also desirable that the instrumentation survives for tens of years in order to allow a constant monitoring of the structure aging. This contribution presents the results of a four-year effort to develop, test and industrially produce a palette of sensors responding to the above requirements and adapted to different applications and host materials. These sensors include a small version (length up to 2 m) adapted for embedding in mortars, grout and glues, an intermediate version of length between 20 cm and 6 m adapted to direct concrete embedding or surface installation and a long version adapted to measure large deformations (up to 2%) over length up to 30 m and especially adapted for geostructures monitoring.

  18. 9th Structural Engineering Convention 2014

    CERN Document Server

    2015-01-01

    The book presents research papers presented by academicians, researchers, and practicing structural engineers from India and abroad in the recently held Structural Engineering Convention (SEC) 2014 at Indian Institute of Technology Delhi during 22 – 24 December 2014. The book is divided into three volumes and encompasses multidisciplinary areas within structural engineering, such as earthquake engineering and structural dynamics, structural mechanics, finite element methods, structural vibration control, advanced cementitious and composite materials, bridge engineering, and soil-structure interaction. Advances in Structural Engineering is a useful reference material for structural engineering fraternity including undergraduate and postgraduate students, academicians, researchers and practicing engineers.

  19. Civil Engineering Applications of Ground Penetrating Radar Recent Advances @ the ELEDIA Research Center

    Science.gov (United States)

    Salucci, Marco; Tenuti, Lorenza; Nardin, Cristina; Oliveri, Giacomo; Viani, Federico; Rocca, Paolo; Massa, Andrea

    2014-05-01

    The application of non-destructive testing and evaluation (NDT/NDE) methodologies in civil engineering has raised a growing interest during the last years because of its potential impact in several different scenarios. As a consequence, Ground Penetrating Radar (GPR) technologies have been widely adopted as an instrument for the inspection of the structural stability of buildings and for the detection of cracks and voids. In this framework, the development and validation of GPR algorithms and methodologies represents one of the most active research areas within the ELEDIA Research Center of the University of Trento. More in detail, great efforts have been devoted towards the development of inversion techniques based on the integration of deterministic and stochastic search algorithms with multi-focusing strategies. These approaches proved to be effective in mitigating the effects of both nonlinearity and ill-posedness of microwave imaging problems, which represent the well-known issues arising in GPR inverse scattering formulations. More in detail, a regularized multi-resolution approach based on the Inexact Newton Method (INM) has been recently applied to subsurface prospecting, showing a remarkable advantage over a single-resolution implementation [1]. Moreover, the use of multi-frequency or frequency-hopping strategies to exploit the information coming from GPR data collected in time domain and transformed into its frequency components has been proposed as well. In this framework, the effectiveness of the multi-resolution multi-frequency techniques has been proven on synthetic data generated with numerical models such as GprMax [2]. The application of inversion algorithms based on Bayesian Compressive Sampling (BCS) [3][4] to GPR is currently under investigation, as well, in order to exploit their capability to provide satisfactory reconstructions in presence of single and multiple sparse scatterers [3][4]. Furthermore, multi-scaling approaches exploiting level

  20. COST Action TU1208 "Civil Engineering Applications of Ground Penetrating Radar:" ongoing research activities and mid-term results

    Science.gov (United States)

    Pajewski, Lara; Benedetto, Andrea; Loizos, Andreas; Slob, Evert; Tosti, Fabio

    2015-04-01

    This work aims at presenting the ongoing activities and mid-term results of the COST (European COoperation in Science and Technology) Action TU1208 'Civil Engineering Applications of Ground Penetrating Radar.' Almost three hundreds experts are participating to the Action, from 28 COST Countries (Austria, Belgium, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Ireland, Italy, Latvia, Malta, Macedonia, The Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom), and from Albania, Armenia, Australia, Egypt, Hong Kong, Jordan, Israel, Philippines, Russia, Rwanda, Ukraine, and United States of America. In September 2014, TU1208 has been praised among the running Actions as 'COST Success Story' ('The Cities of Tomorrow: The Challenges of Horizon 2020,' September 17-19, 2014, Torino, IT - A COST strategic workshop on the development and needs of the European cities). The principal goal of the COST Action TU1208 is to exchange and increase scientific-technical knowledge and experience of GPR techniques in civil engineering, whilst simultaneously promoting throughout Europe the effective use of this safe and non-destructive technique in the monitoring of infrastructures and structures. Moreover, the Action is oriented to the following specific objectives and expected deliverables: (i) coordinating European scientists to highlight problems, merits and limits of current GPR systems; (ii) developing innovative protocols and guidelines, which will be published in a handbook and constitute a basis for European standards, for an effective GPR application in civil- engineering tasks; safety, economic and financial criteria will be integrated within the protocols; (iii) integrating competences for the improvement and merging of electromagnetic scattering techniques and of data- processing techniques; this will lead to a novel freeware tool for the localization of buried objects

  1. Design of the Curriculum for a Second-Cycle Course in Civil Engineering in the Context of the Bologna Framework

    Science.gov (United States)

    Gavin, K. G.

    2010-01-01

    This paper describes the design of the curriculum for a Master of Engineering programme in civil engineering at University College Dublin. The revised programme was established to meet the requirements of the Bologna process and this paper specifically considers the design of a new, second-cycle master's component of the programme. In addition to…

  2. Solving Civil Engineering Problems by Means of Fuzzy and Stochastic MCDM Methods: Current State and Future Research

    Directory of Open Access Journals (Sweden)

    Jurgita Antucheviciene

    2015-01-01

    Full Text Available The present review examines decision-making methods developed for dealing with uncertainties and applied to solve problems of civil engineering. Several methodological difficulties emerging from uncertainty quantification in decision-making are identified. The review is focused on formal methods of multiple criteria decision-making (MCDM. Handling of uncertainty by means of fuzzy logic and probabilistic modelling is analysed in light of MCDM. A sensitivity analysis of MCDM problems with uncertainties is discussed. An application of stochastic MCDM methods to a design of safety critical objects of civil engineering is considered. Prospects of using MCDM under uncertainty in developing areas of civil engineering are discussed in brief. These areas are design of sustainable and energy efficient buildings, building information modelling, and assurance of security and safety of built property. It is stated that before long the decision-making in civil engineering may face several methodological problems: the need to combine fuzzy and probabilistic representations of uncertainties in one decision-making matrix, the necessity to extend a global sensitivity analysis to all input elements of a MCDM problem with uncertainties, and an application of MCDM methods in the areas of civil engineering where decision-making under uncertainty is presently not common.

  3. Application of fiber optic distributed sensor for strain measurement in civil engineering

    Science.gov (United States)

    Kurashima, Toshio; Usu, Tomonori; Tanaka, Kuniaki; Nobiki, Atsushi; Sato, Masashi; Nakai, Kenji

    1997-11-01

    We report on civil engineering applications of a fiber optic distributed strain sensor. It consists of a sensing fiber and a high performance optical time domain reflectometer (OTDR), for measuring both strain and optical loss distribution along optical fibers by accessing only one end of the fiber. The OTDR can measure distributed strain with an accuracy of better than +/- 60 X 10-6 and a high spatial resolution of up to 1 m over a 10 km long fiber. In model experiments using the OTDR, we measured the strain changes in fibers attached to the surface of a concrete test beam. The performance of the fiber strain sensor was tested by measuring the strain distribution in optical fibers and comparing the results with resistance strain gage measurements for several loads. We found that the two sets of results were similar, and in addition, we demonstrated experimentally that the sensor was able to measure an induced strain change of less than 100 by 10-6, which is nearly the elastic limit of the concrete material. These results show the potential of the OTDR to extend the application of monitoring systems to such areas as large building diagnostics for civil engineering.

  4. Utilization of electromigration in civil and environmental engineering--processes, transport rates and matrix changes.

    Science.gov (United States)

    Ottosen, Lisbeth M; Christensen, Iben V; Rorig-Dalgård, Inge; Jensen, Pernille E; Hansen, Henrik K

    2008-07-01

    Electromigration (movement of ions in an applied electric field) is utilized for supply or extraction of ions from various porous materials within both civil and environmental engineering. In civil engineering, most research has been conducted on the removal of chlorides from concrete to hinder reinforcement corrosion while in environmental engineering remediation of heavy metal polluted soil is the issue most studied. Never the less, experiments have been conducted with utilization for several other materials and purposes within both engineering fields. Even though there are many topics of common interest in the use of electromigration for the two fields, there is no tradition for collaboration. The present paper is a review with the aim of pointing out areas of shared interest. Focus is laid on the purposes of the different processes, transport rates of various ions in different materials and on changes in the matrix itself. Desorption and dissolution of the target elements into ionic form is a key issue to most of the processes, and can be the limiting step. The removal rate is generally below 1 cm day(- 1), but it can be much less than 1 mm day(- 1) when desorption is slow and insufficient. Matrix changes occurs under the action of the applied electric field and it includes both physico-chemical and hydrological changes. Some of the solid phases is weathered and new can be formed. Increased fundamental understanding of the effects and side effects, when applying the electric field to a porous material, can lead to improvement of the known technologies and possibly to new applications.

  5. A PARTNERSHIP OF LECTURERS AS A NEW ORGANIZATIONAL FORM OF CIVIL ENGINEERING EDUCATION IN MOSCOW IN THE EARLY 20th CENTURY

    OpenAIRE

    Panteleeva Tatyana Leonidovna

    2012-01-01

    The article based on unpublished archived documents deals with the history of the first civil engineering colleges in Moscow. They served as the foundation of professional training in civil engineering. Many distinguished persons, well-known as the founders of academic schools started their careers there. The first civil engineering college in Moscow, founded by M.K. Priorov in 1905, enjoyed high enrolment rates due to the growing needs in skilled builders. However, officers of...

  6. COST Action TU1208 "Civil Engineering Applications of Ground Penetrating Radar": first-year activities and results

    Science.gov (United States)

    Pajewski, Lara; Benedetto, Andrea; Loizos, Andreas; Slob, Evert; Tosti, Fabio

    2014-05-01

    This work aims at presenting the first-year activities and results of COST (European COoperation in Science and Technology) Action TU1208 "Civil Engineering Applications of Ground Penetrating Radar". This Action was launched in April 2013 and will last four years. The principal aim of COST Action TU1208 is to exchange and increase scientific-technical knowledge and experience of GPR techniques in civil engineering, whilst simultaneously promoting throughout Europe the effective use of this safe and non-destructive technique in the monitoring of infrastructures and structures. Moreover, the Action is oriented to the following specific objectives and expected deliverables: (i) coordinating European scientists to highlight problems, merits and limits of current GPR systems; (ii) developing innovative protocols and guidelines, which will be published in a handbook and constitute a basis for European standards, for an effective GPR application in civil- engineering tasks; safety, economic and financial criteria will be integrated within the protocols; (iii) integrating competences for the improvement and merging of electromagnetic scattering techniques and of data- processing techniques; this will lead to a novel freeware tool for the localization of buried objects, shape-reconstruction and estimation of geophysical parameters useful for civil engineering needs; (iv) networking for the design, realization and optimization of innovative GPR equipment; (v) comparing GPR with different NDT techniques, such as ultrasonic, radiographic, liquid-penetrant, magnetic-particle, acoustic-emission and eddy-current testing; (vi) comparing GPR technology and methodology used in civil engineering with those used in other fields; (vii) promotion of a more widespread, advanced and efficient use of GPR in civil engineering; and (viii) organization of a high-level modular training program for GPR European users. Four Working Groups (WGs) carry out the research activities. The first WG

  7. 土木工程质量管理研究%Study on Quality Management of Civil Engineering

    Institute of Scientific and Technical Information of China (English)

    戚甘红

    2012-01-01

    本文主要结合笔者多年来从事土木工程工作的工作经验,首先对土木工程的质量管理内涵做了简要的阐述,在此基础上,对土木工程相关阶段的质量管理进行探讨,以期能提高工程的整体质量.%This paper combines author's many years' working experience in civil engineering, expounds the meaning of quality management in civil engineering briefly, on this basis, explores the quality management of related stage in civil engineering, so as to improve the overall quality of project.

  8. GPR applications in Civil Engineering in Spain - state-of-the-art

    Science.gov (United States)

    Pérez Gracia, Vega; Solla, Mercedes; Santos-Assunçao, Sonia; Lorenzo, Henrique

    2014-05-01

    GPR was introduced in Spain in 1990, and the first significant work was the PhD thesis of H. Lorenzo in 1994. Due to its versatile applicability, the employ has been increased and actually, GPR is extensively used in detection of pipes, wiring and urban services mainly. During the last years, this method was also widely utilized in the detection of graves from the civil war and in forensic studies, with irregular results. It was also commonly applied in archaeology. Actually exists more than 20 private companies offering geotechnical services by means of GPR. Also, several public institutions as Universities and Research Institutes base part of their research in GPR or in GPR applications. Notwithstanding, no training courses of specific formation on GPR is offered, but in several doctorate programs it is possible to work with GPR. Also, in many schools, GPR is part of the geophysical formation of graduate students. However, no national guidelines and rules exist, and each company defines the investigation protocols. Nevertheless, one of the aims of the Comisión Española de Geodesia y Geofísica (Spanish Committee for Geodesy and Geophysics) is to define guidelines for the GPR studies. Probably, the existence of national guidelines or perhaps European guidelines could be the most effective way to promote the responsible use of GPR in different domains. On the other hand, perhaps recommendations on the use of combined methodologies could be a practical way to persuade in the application of geophysical non-destructive technologies. The CEDEX, Centro de Estudios y Experimentación de Obras Públicas (Center for Studies and Experimentation in Civil Engineering), which is a civil engineering research agency in Spain, offers different test sites to calibrate and evaluate the method. It is an autonomous organization, organically ascribed at present to the Ministry of Fomento, and functionally ascribed to the Ministries of Fomento and Medioambiente of Spain, giving

  9. Long-term lining performance - Civil engineering problem of potential retrieval of buried spent nuclear fuel

    Energy Technology Data Exchange (ETDEWEB)

    Vasicek, Radek, E-mail: radek.vasicek@fsv.cvut.c [Czech Technical University in Prague, Faculty of Civil Engineering, Centre of Experimental Geotechnics, Thakurova 7, 16629 Prague 6 (Czech Republic); Svoboda, Jiri, E-mail: jiri.svoboda@seznam.c [Czech Technical University in Prague, Faculty of Civil Engineering, Centre of Experimental Geotechnics, Thakurova 7, 16629 Prague 6 (Czech Republic)

    2011-04-15

    The current solution for the spent fuel, high-level and long-lived radioactive waste is to store them at surface facilities from which they will be subsequently moved to a deep repository. No such repositories are in operation currently but several such facilities are close to the construction phase. A deep repository can be situated in several types of geological conditions including clay formations, salt sediments, argillites and tuffitic and granitic rocks. The character of the host rock is the key factor determining the design and specific requirements of individual components of such a facility. The future potential retrieval of canisters containing nuclear waste from the repository is a further influential factor. The reason for retrieval of containers lies in the development of fast reactors and increased interest for spent fuel reprocessing. Naturally, the decision as to whether retrievability is technically feasible must be made before finalising the design and construction process of the repository. If the decision is made to retrieve, a design which will include all the relevant safety aspects for the potential retrieval of canisters must be determined. The lay-out of the repository, the materials to be used and the design of the various structures of the facility (e.g. access tunnels, disposal shafts, buffer and backfill) are not the only issues to be addressed. The long-term stability of the system as a whole, i.e. of all the components, is crucial. Depending on the disposal concept chosen, the thermal load generated by the waste in the disposal container, saturation by water from the surrounding environment and the loading of the host rock massif will constitute the main processes which will affect the behaviour, safety and future functioning of the repository from the civil engineering point of view. The long-term stability of the lining of disposal galleries is a basic precondition for the safe removal of spent nuclear waste from deep underground

  10. RESOURCE MANAGEMENT AND FORECASTING LOSSES WITHIN THE PROJECT ORGANISATIONAL STRUCTURE OF THE CIVIL PROTECTION SYSTEM

    OpenAIRE

    Rak, Yu; Kvashuk, V.

    2014-01-01

    To develop a method, based on Pareto principles, for increasing resource management effectiveness with prediction and minimisation of losses arising from emergency situations, both industrial and natural within the project-based organisation structure of the civil protection system. Methods: Theoretical research of an effective management process, with the aid of Pareto distribution, was applied to project organisational structures through the Office of Civil Protection. Current project manag...

  11. Ten Engineers Reading: Disjunctions between Preference and Practice in Civil Engineering Faculty Responses

    Science.gov (United States)

    Taylor, Summer Smith; Patton, Martha D.

    2006-01-01

    Previous research has indicated that engineering faculty do not follow best practices when commenting on students' technical writing. However, it is unclear whether the faculty prefer to comment in these ineffective ways, or whether they prefer more effective practices but simply do not enact them. This study adapts a well known study of response…

  12. Designing educational software for analysing pressurised hydraulic systems in civil engineering

    Directory of Open Access Journals (Sweden)

    Myriam Rocío Pallares Muñoz

    2010-04-01

    Full Text Available New information technologies have opened up a world of inexhaustible possibilities in teaching. Using such technologies in technical teaching has become indispensable due to the nature of current resources in industrial design and production. This work consists of preparing didactic material (educational software aimed at tea- ching fluid mechanics, particularly analysing tube, tank and pumping systems, initially aimed at civil engineering students from the Universidad Santo Tomás in Bogotá. Such materials have been successfully developed and used in their formal programmes by several universities around the world during the last few years. The didactic software mentioned in this work was constructed using Visual Basic programming language. This has resulted in a very useful educational tool, leading to effective teacher—student communication which is suitable for both the classroom and students’ personal work (Angel y Bautista, 2001; Aguiar, 2002.

  13. Methodology to improve design of accelerated life tests in civil engineering projects.

    Directory of Open Access Journals (Sweden)

    Jing Lin

    Full Text Available For reliability testing an Energy Expansion Tree (EET and a companion Energy Function Model (EFM are proposed and described in this paper. Different from conventional approaches, the EET provides a more comprehensive and objective way to systematically identify external energy factors affecting reliability. The EFM introduces energy loss into a traditional Function Model to identify internal energy sources affecting reliability. The combination creates a sound way to enumerate the energies to which a system may be exposed during its lifetime. We input these energies into planning an accelerated life test, a Multi Environment Over Stress Test. The test objective is to discover weak links and interactions among the system and the energies to which it is exposed, and design them out. As an example, the methods are applied to the pipe in subsea pipeline. However, they can be widely used in other civil engineering industries as well. The proposed method is compared with current methods.

  14. Experience within the CERN Civil Engineering Group with Outsourced Design Services

    CERN Document Server

    Watson, T

    1998-01-01

    In April 1996, CERN awarded three contracts for civil engineering design services associated with the LHC project. The three contracts were awarded to three different joint ventures of firms from five member states. The total bid price for these services was in excess of 35 MCHF and the contracts will run for up to seven years. This paper aims to discuss and analyze the experience gained to date in the management of these contracts. In particular, the paper will address the issues of conditions of contract and specification for this form of contract. Current experience with each of the three consultants will be presented with the areas of difficulty highlighted. Conclusions will be made regarding future use of such contracts and in particular the way in which CERN must change in order to work efficiently with external designers.

  15. Human engineering analysis for the high speed civil transport flight deck

    Science.gov (United States)

    Regal, David M.; Alter, Keith W.

    1993-01-01

    The Boeing Company is investigating the feasibility of building a second generation supersonic transport. If current studies support its viability, this airplane, known as the High Speed Civil Transport (HSCT), could be launched early in the next century. The HSCT will cruise at Mach 2.4, be over 300 feet long, have an initial range of between 5000 and 6000 NM, and carry approximately 300 passengers. We are presently involved in developing an advanced flight deck for the HSCT. As part of this effort we are undertaking a human engineering analysis that involves a top-down, mission driven approach that will allow a systematic determination of flight deck functional and information requirements. The present paper describes this work.

  16. Web-based Peer Assessment: A Case Study with Civil Engineering Students

    Directory of Open Access Journals (Sweden)

    Gonçalo Cruz

    2013-02-01

    Full Text Available Peer-assessed online collaborative writing is of growing importance for higher education. Based on the quantitative and qualitative analysis of collected data, this work presents the results of a case study in a graduate civil engineering course at the University of Trás-os-Montes e Alto Douro, Vila Real, Portugal. After an overall presentation of the learning activity, it examines students’ attitudes towards web-based peer assessment and identifies which factors are related to students’ use and appreciation of feedback. In addition, an analysis of the type of feedback is presented in an attempt to evaluate students’  written communication skills. The results of this study provide indications on how to improve the design and implementation of future web-based peer assessment tasks and raise questions on the effectiveness of peer/teacher grading in the use of feedback.

  17. Discovery Mondays - 'The civil engineering genius of the 100-metre deep underground caverns'

    CERN Multimedia

    2004-01-01

    CERN is first and foremost a place where physicists study particle collisions. But to be able to observe the infinitely small, they need huge pieces of equipment, the accelerators and detectors, whose construction, some 100 metres below the earth's surface, calls on the services of other fascinating disciplines. Take civil engineering, for example. At the next Discovery Monday, come and find out about the machines involved in the large-scale excavation and concreting work. Everyone is welcome at Microcosm, which will be specially transformed into a worksite for the occasion! Come along to Microcosm (Reception Building 33, Meyrin site) on Monday 6 September from 7:30 p.m. to 9:00 p.m. Entrance Free http://www.cern.ch/microcosm

  18. Methodology to improve design of accelerated life tests in civil engineering projects.

    Science.gov (United States)

    Lin, Jing; Yuan, Yongbo; Zhou, Jilai; Gao, Jie

    2014-01-01

    For reliability testing an Energy Expansion Tree (EET) and a companion Energy Function Model (EFM) are proposed and described in this paper. Different from conventional approaches, the EET provides a more comprehensive and objective way to systematically identify external energy factors affecting reliability. The EFM introduces energy loss into a traditional Function Model to identify internal energy sources affecting reliability. The combination creates a sound way to enumerate the energies to which a system may be exposed during its lifetime. We input these energies into planning an accelerated life test, a Multi Environment Over Stress Test. The test objective is to discover weak links and interactions among the system and the energies to which it is exposed, and design them out. As an example, the methods are applied to the pipe in subsea pipeline. However, they can be widely used in other civil engineering industries as well. The proposed method is compared with current methods.

  19. Civil-engineering work for Linac 4 and related roadworks - information for drivers

    CERN Multimedia

    TS Department

    2008-01-01

    The civil-engineering work for the construction of the Linac 4 accelerator has started on 22 October on the Mont Citron, the mound just opposite Restaurant No. 2 between the Computer Centre and the PS complex. Initially the work will involve excavating the mound and transporting the spoil to the area in front of Building SM18. This first phase of work will last for about five months until April 2009. The large number of lorries will cause disruption to traffic on the Route Rutherford, part of the Route Einstein and in the transfer tunnel between the two sites. Traffic lights for alternating traffic will be in operation at each end of the tunnel since there is insufficient room for two lorries travelling in opposite directions to use it at the same time. Consequently, users are strongly recommended not to use the tunnel except for transporting equipment between the two sites. Users not transporting equipment are strongly recommended ...

  20. ADVANCED NICKEL-BASED AND NICKEL-IRON-BASED SUPERALLOYS FOR CIVIL ENGINEERING APPLICATIONS

    Institute of Scientific and Technical Information of China (English)

    U. Brill

    2005-01-01

    The use of high-temperature materials is especially important in power station construction,heating systems engineering, furnace industry, chemical and petrochemical industry, waste incineration plants, coal gasification plants and for flying gas turbines in civil and military aircrafts and helicopters. Particularly in recent years, the development of new processes and the drive to improve the economics of existing processes have increased the requirements significantly so that it is necessary to change from well-proven materials to new alloys. Hitherto, heat resistant ferritic steels sufficed in conventional power station constructions for temperatures up to 550℃ newly developed ferritic/martensitic steels provide sufficient strength up to about 600-620℃. In new processes, e.g. fiuidized-bed combustion of coal, process temperatures up to 900℃ occur. However, this is not the upper limit, since in combustion engines, e.g. gas turbines. Material temperatures up to 1100℃ are reached locally. Similar development trends can also be identified in the petrochemical industry and in the heat treatment and furnace engineering. The advance to ever higher material temperatures now not only has the consequence of having to use materials with enhanced high-strength properties, considerable attention now also has to be given to their chemical stability in corrosive media. Therefore not only examples of the use of high-temperature alloys for practical applications will be given but also be contributed to some general rules for material selection with regard to their high-temperature strength and corrosion resistance.

  1. MULTIMEDIA TECHNOLOGIES FOR TRAINING FOR "DESCRIPTIVE GEOMETRY AND ENGINEERING GRAPHICS" COURSE FOR STUDENTS OF THE FACULTY OF CIVIL ENGINEERING IN KUBGAU

    Directory of Open Access Journals (Sweden)

    Serga G. V.

    2015-03-01

    Full Text Available The article examines the teaching descriptive geometry and engineering graphics on Faculty of Civil Engineering, higher-motivation of students to obtain needed competence to adopt competently compensation-drawings. The article describes the basic methods of conducting classes on the subject "Descriptive Geometry and Engineering Graphics" for students enrolled in the specialty 08.05.01 "Construction of unique buildings and structures." For lectures and laboratory classes in the department of descriptive geometry and graphics were developed multimedia courses with animation for all studied subjects, educational presentations that reveal the specifics of the discipline into account peculiarities of the educational process of learning in the Kuban State Agricultural university. Multimedia courses using enables us to model a situation that forces students to analyze, compare the solves of the task. Students develop an algorithmic way of thinking, formed the ability to think and act optimally variability. The use of multimedia development at the Department of Descriptive Geometry and Graphics showed an increase of performance results compared to the previous years of employment without presentation. It indicates that the use of multimedia lectures and laboratory exercises improves the efficiency and quality of education, as well as gives an opportunity to a greater extent to explain the learning material for students

  2. 土木工程专业结构力学教学的思考与体会%Thinking and experience of Structure Mechanics teaching of civil engineering specialty

    Institute of Scientific and Technical Information of China (English)

    王丹

    2011-01-01

    结合多年结构力学教学实践,针对结构力学课程特点提出几点建议:如提高学生学习兴趣、帮助学生建立自信;注意讲课速度;多做习题;多媒体与板书结合;课上测验、作业、答疑;教师要有职业精神、爱岗敬业等方法,通过实际教学实践,使得教学效果取得了明显的改善。%Combining with years Structure Mechanics teaching experience,according to the Structure Mechanics course features provided some suggestions:such as improve students' study interest,help students establish self-confidence,pay attention to lecture speed,do

  3. Cost control management strategies of civil engineering%土建工程造价控制管理策略

    Institute of Scientific and Technical Information of China (English)

    刘斌

    2015-01-01

    介绍了土建工程造价管理的重要性,从工程决策、设计、施工、决算四个阶段,阐述了土建工程造价管理的策略,指出工程造价管理贯穿于施工全过程,只有严格控制施工各环节,才能实现企业成本的节约与积累。%The article introduces the importance of civil engineering cost management,describes civil engineering cost management strategies from four phases of engineering decision,design,construction and computation,and finally points out that engineering cost management penetrates the whole construction process. Therefore,it is necessary for strictly controlling construction points so as to save and accumulate enterprise cost.

  4. Incorporating a Systems Approach into Civil and Environmental Engineering Curricula: Effect on Course Redesign, and Student and Faculty Attitudes

    Science.gov (United States)

    Hayden, Nancy J.; Rizzo, Donna M.; Dewoolkar, Mandar M.; Neumann, Maureen D.; Lathem, Sandra; Sadek, Adel

    2011-01-01

    This paper presents a brief overview of the changes made during our department level reform (DLR) process (Grant Title: "A Systems Approach for Civil and Environmental Engineering Education: Integrating Systems Thinking, Inquiry-Based Learning and Catamount Community Service-Learning Projects") and some of the effects of these changes on…

  5. An Analysis of Female Lecturers' Participation in Civil Engineering Research and Development Activities at One Polytechnic in Zimbabwe

    Science.gov (United States)

    Chikuvadze, Pinias; Matswetu, Vimbai Sharon; Mugijima, Samuel

    2015-01-01

    This study sought to explore female lecturers' participation in civil engineering research and development activities at one polytechnic in Zimbabwe. Case study design was chosen for this study to make predictions, narration of events, comparisons and drawing of conclusions. The female lecturers were purposively sampled to participate in the…

  6. Winning the Popularity Contest: Researcher Preference When Selecting Resources for Civil Engineering, Computer Science, Mathematics and Physics Dissertations

    Science.gov (United States)

    Dotson, Daniel S.; Franks, Tina P.

    2015-01-01

    More than 53,000 citations from 609 dissertations published at The Ohio State University between 1998-2012 representing four science disciplines--civil engineering, computer science, mathematics and physics--were examined to determine what, if any, preferences or trends exist. This case study seeks to identify whether or not researcher preferences…

  7. Significance of Operating Environment in Condition Monitoring of Large Civil Structures

    Directory of Open Access Journals (Sweden)

    Sreenivas Alampalli

    1999-01-01

    Full Text Available Success of remote long-term condition monitoring of large civil structures and developing calibrated analytical models for damage detection, depend significantly on establishing accurate baseline signatures and their sensitivity. Most studies reported in the literature concentrated on the effect of structural damage on modal parameters without emphasis on reliability of modal parameters. Thus, a field bridge structure was studied for the significance of operating conditions in relation to baseline signatures. Results indicate that in practice, civil structures should be monitored for at least one full cycle of in-service environmental changes before establishing baselines for condition monitoring or calibrating finite-element models. Boundary conditions deserve special attention.

  8. MANUAL. Fly ash in civil engineering, Gravel roads; HANDBOK. Flygaska i mark- och vaegbyggnad, Grusvaegar

    Energy Technology Data Exchange (ETDEWEB)

    Munde, Hanna; Svedberg, Bo; Macsik, Josef; Maijala, Aino; Lahtinen, Pentti; Ekdahl, Peter; Neren, Jens [Vattenfall AB, Stockholm (Sweden). Vaerme Norden

    2006-01-15

    Fly ash based on biofuels or coal has been used as construction material for a long time in roads and other civil engineering applications. Some example, where it has been used in roadbase and subbase of gravel roads, are in the counties of Uppsala, Soedermanland, Vaestmanland and in Finland. The use of fly ash has contributed to good function for example as bearing capacity, thaw and frost capacity and good durability. This has also reduced costs for maintenance. The objective of this project was to develop a manual to provide a base for contemporary use of fly ash in road constructions. In the manual experience from studies, field tests and regulations has been compiled. The manual handles fly ash as base for products to be used in base and subbase in gravel roads. Future user of the guidelines are mainly consultant engineers and contractors. However the aim of the manual is to also support road administrators, environmental authorities and industry. The project has been carried out parallel to another ongoing national project titled 'Guidelines, Use of alternative materials in civil engineering'. The objective of that project is to establish a base for handling of alternative materials in Sweden. Fly ash in gravel roads are mainly used in two typical applications, one without any additive in a single layer and one with fly ash mixed with gravel. The use of flyash provides functional properties such as increased stiffness, stability and enhanced frost and thaw capacity for the road construction in total. Furthermore the products based on fly ash will have low permeability and good frost and thaw durability. These properties are for example related to fly ash quality, design and construction and are in general expected to be better than for traditional constructions using, for example, sand or gravel. The properties can be enhanced further by using binders such as cement and Merit. Fly ash should always be used above the ground water table with

  9. Conceptual Design of a Two Spool Compressor for the NASA Large Civil Tilt Rotor Engine

    Science.gov (United States)

    Veres, Joseph P.; Thurman, Douglas R.

    2010-01-01

    This paper focuses on the conceptual design of a two spool compressor for the NASA Large Civil Tilt Rotor engine, which has a design-point pressure ratio goal of 30:1 and an inlet weight flow of 30.0 lbm/sec. The compressor notional design requirements of pressure ratio and low-pressure compressor (LPC) and high pressure ratio compressor (HPC) work split were based on a previous engine system study to meet the mission requirements of the NASA Subsonic Rotary Wing Projects Large Civil Tilt Rotor vehicle concept. Three mean line compressor design and flow analysis codes were utilized for the conceptual design of a two-spool compressor configuration. This study assesses the technical challenges of design for various compressor configuration options to meet the given engine cycle results. In the process of sizing, the technical challenges of the compressor became apparent as the aerodynamics were taken into consideration. Mechanical constraints were considered in the study such as maximum rotor tip speeds and conceptual sizing of rotor disks and shafts. The rotor clearance-to-span ratio in the last stage of the LPC is 1.5% and in the last stage of the HPC is 2.8%. Four different configurations to meet the HPC requirements were studied, ranging from a single stage centrifugal, two axi-centrifugals, and all axial stages. Challenges of the HPC design include the high temperature (1,560deg R) at the exit which could limit the maximum allowable peripheral tip speed for centrifugals, and is dependent on material selection. The mean line design also resulted in the definition of the flow path geometry of the axial and centrifugal compressor stages, rotor and stator vane angles, velocity components, and flow conditions at the leading and trailing edges of each blade row at the hub, mean and tip. A mean line compressor analysis code was used to estimate the compressor performance maps at off-design speeds and to determine the required variable geometry reset schedules of the

  10. Pedagogies to Achieve Sustainability Learning Outcomes in Civil and Environmental Engineering Students

    Directory of Open Access Journals (Sweden)

    Angela R. Bielefeldt

    2013-10-01

    Full Text Available The civil and environmental engineering disciplines have identified the levels of knowledge about sustainability that are desirable for students to achieve as they graduate with a bachelor’s degree, as well as sustainability-related competencies to be obtained during a master’s degree, and on-the-job, prior to professional licensure. Different pedagogies are better suited to help students attain these levels of cognitive ability, while also developing affective outcomes. This paper provides examples of different methods that have been used at one institution to educate engineering students about sustainability, supported with data that indicates whether the method successfully achieved the targeted learning outcomes. Lectures, in-class active learning, readings, and appropriately targeted homework assignments can achieve basic sustainability knowledge and comprehension by requiring students to define, identify, and explain aspects of sustainability. Case studies and the application of software tools are good methods to achieve application and analysis competencies. Project-based learning (PBL and project-based service-learning (PBSL design projects can reach the synthesis level and may also develop affective outcomes related to sustainability. The results provide examples that may apply to a wider range of disciplines and suggest sustainability outcomes that are particularly difficult to teach and/or assess.

  11. Health monitoring with optical fiber sensors: from human body to civil structures

    Science.gov (United States)

    Pinet, Éric; Hamel, Caroline; Glišić, Branko; Inaudi, Daniele; Miron, Nicolae

    2007-04-01

    Although structural health monitoring and patient monitoring may benefit from the unique advantages of optical fiber sensors (OFS) such as electromagnetic interferences (EMI) immunity, sensor small size and long term reliability, both applications are facing different realities. This paper presents, with practical examples, several OFS technologies ranging from single-point to distributed sensors used to address the health monitoring challenges in medical and in civil engineering fields. OFS for medical applications are single-point, measuring mainly vital parameters such as pressure or temperature. In the intra-aortic balloon pumping (IABP) therapy, a miniature OFS can monitor in situ aortic blood pressure to trigger catheter balloon inflation/deflation in counter-pulsation with heartbeats. Similar sensors reliably monitor the intracranial pressure (ICP) of critical care patients, even during surgical interventions or examinations under medical resonance imaging (MRI). Temperature OFS are also the ideal monitoring solution for such harsh environments. Most of OFS for structural health monitoring are distributed or have long gage length, although quasi-distributed short gage sensors are also used. Those sensors measure mainly strain/load, temperature, pressure and elongation. SOFO type deformation sensors were used to monitor and secure the Bolshoi Moskvoretskiy Bridge in Moscow. Safety of Plavinu dam built on clay and sand in Latvia was increased by monitoring bitumen joints displacement and temperature changes using SMARTape and Temperature Sensitive Cable read with DiTeSt unit. A similar solution was used for monitoring a pipeline built in an unstable area near Rimini in Italy.

  12. Summary of the Large Civil Tiltrotor (LCTR2) Engine Gearbox Study

    Science.gov (United States)

    Snyder, Christopher A.; Robuck, Mark; Wilkerson, Joseph; Nordstrom, Carl

    2010-01-01

    In support of the Fundamental Aeronautics Program, Subsonic Rotary Wing Project, NASA is continuing to study the Large Civil Tiltrotor (LCTR) concept to help define/refine vehicle, system and subsystem attributes. These attributes can then be used to define performance requirements and identify new or advanced technologies to achieve an operational vehicle class. As part of this goal, NASA contracted with The Boeing Company and its subcontractor Rolls-Royce to perform an investigation of different combinations of engine and gearbox variability to achieve a maximum of 50 percent rotor tip speed reduction from hover to cruise conditions. Previous NASA studies identified the 50 percent rotor speed reduction minimized vehicle gross weight and fuel burn. The LCTR2 (LCTR-iteration 2) was the contracted study baseline for initial sizing. Rotor tip speed ratios (cruise to hover) of 100, 77, and 54 percent were analyzed for each combination of engine and gearbox speed reduction to achieve the chosen rotor tip speed ratio. Three different engine and gearbox technology levels were assumed; commercial off-the-shelf (COTS), entry-in-service (EIS) in 2025 and EIS in 2035. These technology levels were applied to determine each particular effect on vehicle gross weight and fuel burn, while other vehicle technologies were assumed constant. This report summarizes the work performed that is being put together into a comprehensive NASA contractor report. Some background on the LCTR concept and baseline vehicle will be given and then a discussion concerning the technical approach utilized. Major study assumptions and results will be presented and discussed. Finally conclusions will be drawn as well as suggestions provided for future efforts.

  13. Curricular Reform: Systems Modeling and Sustainability in Civil and Environmental Engineering at the University of Vermont

    Science.gov (United States)

    Rizzo, D. M.; Hayden, N. J.; Dewoolkar, M.; Neumann, M.; Lathem, S.

    2009-12-01

    Researchers at the University of Vermont were awarded a NSF-sponsored Department Level Reform (DLR) grant to incorporate a systems approach to engineering problem solving within the civil and environmental engineering programs. A systems approach challenges students to consider the environmental, social, and economic aspects within engineering solutions. Likewise, sustainability requires a holistic approach to problem solving that includes economic, social and environmental factors. Our reform has taken a multi-pronged approach in two main areas that include implementing: a) a sequence of three systems courses related to environmental and transportation systems that introduce systems thinking, sustainability, and systems analysis and modeling; and b) service-learning (SL) projects as a means of practicing the systems approach. Our SL projects are good examples of inquiry-based learning that allow students to emphasize research and learning in areas of most interest to them. The SL projects address real-world open-ended problems. Activities that enhance IT and soft skills for students are incorporated throughout the curricula. Likewise, sustainability has been a central piece of the reform. We present examples of sustainability in the SL and modeling projects within the systems courses (e.g., students have used STELLA™ systems modeling software to address the impact of different carbon sequestration strategies on global climate change). Sustainability in SL projects include mentoring home schooled children in biomimicry projects, developing ECHO exhibits and the design of green roofs, bioretention ponds and porous pavement solutions. Assessment includes formative and summative methods involving student surveys and focus groups, faculty interviews and observations, and evaluation of student work.

  14. Validation of the GPU-Accelerated CFD Solver ELBE for Free Surface Flow Problems in Civil and Environmental Engineering

    Directory of Open Access Journals (Sweden)

    Christian F. Janßen

    2015-07-01

    Full Text Available This contribution is dedicated to demonstrating the high potential and manifold applications of state-of-the-art computational fluid dynamics (CFD tools for free-surface flows in civil and environmental engineering. All simulations were performed with the academic research code ELBE (efficient lattice boltzmann environment, http://www.tuhh.de/elbe. The ELBE code follows the supercomputing-on-the-desktop paradigm and is especially designed for local supercomputing, without tedious accesses to supercomputers. ELBE uses graphics processing units (GPU to accelerate the computations and can be used in a single GPU-equipped workstation of, e.g., a design engineer. The code has been successfully validated in very different fields, mostly related to naval architecture and mechanical engineering. In this contribution, we give an overview of past and present applications with practical relevance for civil engineers. The presented applications are grouped into three major categories: (i tsunami simulations, considering wave propagation, wave runup, inundation and debris flows; (ii dam break simulations; and (iii numerical wave tanks for the calculation of hydrodynamic loads on fixed and moving bodies. This broad range of applications in combination with accurate numerical results and very competitive times to solution demonstrates that modern CFD tools in general, and the ELBE code in particular, can be a helpful design tool for civil and environmental engineers.

  15. Design of the curriculum for a second-cycle course in civil engineering in the context of the Bologna framework

    Science.gov (United States)

    Gavin, K. G.

    2010-05-01

    This paper describes the design of the curriculum for a Master of Engineering programme in civil engineering at University College Dublin. The revised programme was established to meet the requirements of the Bologna process and this paper specifically considers the design of a new, second-cycle master's component of the programme. In addition to considering the content required to meet the learning outcome specified by the professional accreditation body, the paper presents details of attempts to move from a traditional instructor-centred model to a student-centred model of education in order to promote reflective (deep) learning. Although the paper presents a model curriculum for a civil engineering programme, the holistic approach to curriculum design outlined, which considers the organisation, sequence and evaluation strategies adopted, is applicable to all subject areas in higher education.

  16. Statistical Damage Detection of Civil Engineering Structures using ARMAV Models

    DEFF Research Database (Denmark)

    Andersen, P.; Kirkegaard, Poul Henning

    In this paper a statistically based damage detection of a lattice steel mast is performed. By estimation of the modal parameters and their uncertainties it is possible to detect whether some of the modal parameters have changed with a statistical significance. The estimation of the uncertainties ...

  17. Theory of Covariance Equivalent ARMAV Models of Civil Engineering Structures

    DEFF Research Database (Denmark)

    Andersen, P.; Brincker, Rune; Kirkegaard, Poul Henning

    In this paper the theoretical background for using covariance equivalent ARMAV models in modal analysis is discussed. It is shown how to obtain a covariance equivalent ARMA model for a univariate linear second order continuous-time system excited by Gaussian white noise. This result is generalize...

  18. Theory of Covariance Equivalent ARMAV Models of Civil Engineering Structures

    DEFF Research Database (Denmark)

    Andersen, P.; Brincker, Rune; Kirkegaard, Poul Henning

    1996-01-01

    In this paper the theoretical background for using covariance equivalent ARMAV models in modal analysis is discussed. It is shown how to obtain a covariance equivalent ARMA model for a univariate linear second order continous-time system excited by Gaussian white noise. This result is generalized...

  19. Identification of Civil Engineering Structures using Vector ARMA Models

    DEFF Research Database (Denmark)

    Andersen, P.

    The dissertation treats the matter of systems identification and modelling of load-bearing constructions using Auto-Regressive Moving Average Vector (ARMAV) models.......The dissertation treats the matter of systems identification and modelling of load-bearing constructions using Auto-Regressive Moving Average Vector (ARMAV) models....

  20. A Paperless Course on Structural Engineering Programming: Investing in Educational Technology in the Times of the Greek Financial Recession

    Science.gov (United States)

    Sextos, Anastasios G.

    2014-01-01

    This paper presents the structure of an undergraduate course entitled "programming techniques and the use of specialised software in structural engineering" which is offered to the fifth (final) year students of the Civil Engineering Department of Aristotle University Thessaloniki in Greece. The aim of this course is to demonstrate the…

  1. The Use of MIVES as a Sustainability Assessment MCDM Method for Architecture and Civil Engineering Applications

    Directory of Open Access Journals (Sweden)

    Oriol Pons

    2016-05-01

    Full Text Available Environmental and sustainability assessment tools have an important role in moving towards a better world, bringing knowledge and raising awareness. In the architecture and civil engineering sector, these assessment tools help in moving forward to constructions that have less economic, environmental and social impacts. At present, there are numerous assessment tools and methods with different approaches and scopes that have been analyzed in numerous technical reviews. However, there is no agreement about which method should be used for each evaluation case. This research paper synthetically analyzes the main sustainability assessment methods for the construction sector, comparing their strengths and weaknesses in order to present the challenges of the Spanish Integrated Value Model for Sustainability Assessment (MIVES. MIVES is a Multi-Criteria Decision Making method based on the value function concept and the Seminars of experts. Then, this article analyzes MIVES advantages and weak points by going through its methodology and two representative applications. At the end, the area of application of MIVES is described in detail along with the general application cases of the main types of assessment tools and methods.

  2. Engine Installation Effects of Four Civil Transport Airplanes: Wallops Flight Facility Study

    Science.gov (United States)

    Fleming, Gregg G.; Senzig, David A.; McCurdy, David A.; Roof, Christopher J.; Rapoza, Amanda S.

    2003-01-01

    The National Aeronautics and Space Administration (NASA), Langley Research Center (LaRC), the Environmental Measurement and Modeling Division of the United States Department of Transportation s John A. Volpe National Transportation Systems Center (Volpe), and several other organizations (see Appendix A for a complete list of participating organizations and individuals) conducted a noise measurement study at NASA s Wallops Flight Facility (Wallops) near Chincoteague, Virginia during September 2000. This test was intended to determine engine installation effects on four civil transport airplanes: a Boeing 767-400, a McDonnell-Douglas DC9, a Dassault Falcon 2000, and a Beechcraft King Air. Wallops was chosen for this study because of the relatively low ambient noise of the site and the degree of control over airplane operating procedures enabled by operating over a runway closed to other uses during the test period. Measurements were conducted using a twenty microphone U-shaped array oriented perpendicular to the flight path; microphones were mounted such that ground effects were minimized and low elevation angles were observed.

  3. Optimising a modified free-space permittivity characterisation method for civil engineering applications

    Science.gov (United States)

    Muller, Wayne; Scheuermann, Alexander

    2016-04-01

    Measuring the electrical permittivity of civil engineering materials is important for a range of ground penetrating radar (GPR) and pavement moisture measurement applications. Compacted unbound granular (UBG) pavement materials present a number of preparation and measurement challenges using conventional characterisation techniques. As an alternative to these methods, a modified free-space (MFS) characterisation approach has previously been investigated. This paper describes recent work to optimise and validate the MFS technique. The research included finite difference time domain (FDTD) modelling to better understand the nature of wave propagation within material samples and the test apparatus. This research led to improvements in the test approach and optimisation of sample sizes. The influence of antenna spacing and sample thickness on the permittivity results was investigated by a series of experiments separating antennas and measuring samples of nylon and water. Permittivity measurements of samples of nylon and water approximately 100 mm and 170 mm thick were also compared, showing consistent results. These measurements also agreed well with surface probe measurements of the nylon sample and literature values for water. The results indicate permittivity estimates of acceptable accuracy can be obtained using the proposed approach, apparatus and sample sizes.

  4. Virtual Placements to Develop Employability Skills for Civil and Environmental Engineering Students

    Directory of Open Access Journals (Sweden)

    Parneet Paul

    2015-04-01

    Full Text Available This project work addresses the crucial need to encourage undergraduate civil and environmental engineering students to gain employment skills and training right from the start of their studies so that their overall employability increases; their confidence level in networking with industry and within the workplace increases; and so that they are successfully able to obtain employment after finishing their studies. This initiative is a stepping-stone employability exercise which focuses specifically on first year students to help them engage with industry right from the start of their course. It is proposed that they would gain some realistic work experience both individually and as part of group within a virtual work environment using an action learning approach. The virtual environment used was based on SecondLife, a popular virtual reality programme. A pilot scheme was set up and run at Brunel University during the summer of 2014 using eight self-selecting first year students. The scheme’s outputs were extensively monitored and evaluated to assess its impact on the development of employability skills. This approach may prove a cost effective way of letting students gain an insight into the workplace whilst improving these skills. It may also prove a way for employers to select from a large range of students the best to actually undertake their real work-based internships.

  5. Civil-engineering work for Linac 4 and related roadworks - information for drivers

    CERN Multimedia

    TS Department

    2008-01-01

    The civil-engineering work for the construction of the Linac 4 accelerator will start on 22 October on the Mont Citron, the mound just opposite Restaurant No. 2 between the Computer Centre and the PS complex. Initially the work will involve excavating the mound and transporting the spoil to the area in front of Building SM18. This first phase of work will last for about five months until April 2009. The large number of lorries will cause disruption to traffic on the Route Rutherford, part of the Route Einstein and in the transfer tunnel between the two sites. Traffic lights for alternating traffic will be in operation at each end of the tunnel since there is insufficient room for two lorries travelling in opposite directions to use it at the same time. Consequently, users are strongly recommended not to use the tunnel except for transporting equipment between the two sites. Users not transporting equipment are strongly recommended to use Gates A and B. In parallel, a temporary roundabout will be installed ...

  6. Locate damage based on change in structural shape for civil space structures

    Science.gov (United States)

    Yan, Guirong; Yu, Jianxin; Zhao, Yi; Feng, Ruoqiang

    2016-04-01

    Recent years have witnessed a number of collapses of civil space structures, which have severely jeopardized the safety of the general public. Therefore, it is imperative to propose an approach that can localize damage to exact members at an early stage for space structures. Then, the obtained damage location results can be used by the maintenance/repair crew for taking timely actions. For most space structures, the member configuration possesses a regular pattern. For this type of structure, before damage occurs, the regular pattern in the member configuration is maintained. After damage occurs, the regular pattern around the damaged member will be destroyed. In this study, the proposed approach to locate damage is based on the change in the status of regularity of member configuration. Herein the difference in an angle of the triangular shape in the related region of a space structure is used to indicate whether the regularity of member configuration is maintained. To validate the proposed approach, a reticulated shell space structure will be investigated.

  7. 土工合成材料在土木工程领域的研究及应用%Application and Study of Geosynthetics to the Civil Engineering Field

    Institute of Scientific and Technical Information of China (English)

    陈晓旭; 唐小方; 何华拓; 郭冰

    2015-01-01

    Thebriefly introduction of the category of geosyn-thetics, summarize the application and research of Geosynthetics in the civil engineering field, such as road engineering, geotechnical engineering, structural engineering and so on.%简要介绍了土工合成材料的分类,并总结了土工合成材料在道路工程、岩土工程、结构工程等土木工程领域的研究与应用情况。

  8. Evaluation of Existing Structure and Civil Protection Management Framework in Greek Local Authorities: A Questionnaire Survey Demonstrates Why Prevention Fails

    Science.gov (United States)

    Papanikolaou, Dimitrios; Papanikolaou, Ioannis; Diakakis, Michalis; Deligiannakis, Georgios

    2013-04-01

    In the face of a growing number of natural disasters and the increasing costs associated with them, Europe and Greece in particular, have devoted significant efforts and resources in natural hazards mitigation during the last decades. Despite the significant legislative efforts (e.g. 1998/22/EC, 2001/792/EC, 2007/60/EC Directives, 3013/2002 Act) and even though a number of steps has been taken towards improving civil protection, recent catastrophic events have illustrated the weaknesses of current approaches. In particular, in Greece, events such as the 1999 Athens earthquake, the 2007 and 2009 wildfires have shown the inadequacy of prevention and mitigation practices. Given the enhanced civil protection responsibilities, given by the Greek national law (Acts 3013/2002, 3852/2010) to local authorities in Greece, this work analyses and evaluates the existing structure and current management framework under which local authorities function and examines their risk mitigation practices. We conducted the largest questionnaire survey regarding Civil Protections issues, among the municipalities of Greece. To this aim, this work used a innovative online tool to assess current framework. Therefore, a network connecting civil protection departments of municipalities was developed, based on an Internet platform that acted also as a communication tool. Overall, we had feedback either online or offline from 125 municipalities across the country (representing more than one/third of the total municipalities of Greece). Through this network, municipal civil protection officials completed surveys designed to obtain and quantify information on several aspects of civil protection practices and infrastructure. In particular, the examined factors included: (i) personnel and equipment, (ii) inter-agency cooperation, (iii) training, (iv) compliance with existing regulations and (v) persistent problems encountered by civil protection departments, that prevent the effectiveness of current

  9. Application of a moment tensor inversion code developed for mining-induced seismicity to fracture monitoring of civil engineering materials

    Science.gov (United States)

    Linzer, Lindsay; Mhamdi, Lassaad; Schumacher, Thomas

    2015-01-01

    A moment tensor inversion (MTI) code originally developed to compute source mechanisms from mining-induced seismicity data is now being used in the laboratory in a civil engineering research environment. Quantitative seismology methods designed for geological environments are being tested with the aim of developing techniques to assess and monitor fracture processes in structural concrete members such as bridge girders. In this paper, we highlight aspects of the MTI_Toolbox programme that make it applicable to performing inversions on acoustic emission (AE) data recorded by networks of uniaxial sensors. The influence of the configuration of a seismic network on the conditioning of the least-squares system and subsequent moment tensor results for a real, 3-D network are compared to a hypothetical 2-D version of the same network. This comparative analysis is undertaken for different cases: for networks consisting entirely of triaxial or uniaxial sensors; for both P and S-waves, and for P-waves only. The aim is to guide the optimal design of sensor configurations where only uniaxial sensors can be installed. Finally, the findings of recent laboratory experiments where the MTI_Toolbox has been applied to a concrete beam test are presented and discussed.

  10. Time Delay Estimation algorithms adapted to dispersive media - Application to the NDT&E of civil engineering materials

    OpenAIRE

    CHAHINE, Khaled

    2010-01-01

    Time delays are generally estimated for NDT&E purposes, under the assumption of dispersion free media. As opposed to the latter, this work intends to adapt the subspace and MPM family algorithms to the dispersive nature of civil engineering materials (hydraulic concrete, soils) for which the dispersion obeys to the Q-constant model (Jonscher). Two solutions are proposed to jointly estimate the time delay, T, and the Q factor attached to each layer. The performance of algorithms is assessed ag...

  11. Validation of the GPU-Accelerated CFD Solver ELBE for Free Surface Flow Problems in Civil and Environmental Engineering

    OpenAIRE

    Christian F. Janßen; Dennis Mierke; Micha Überrück; Silke Gralher; Thomas Rung

    2015-01-01

    This contribution is dedicated to demonstrating the high potential and manifold applications of state-of-the-art computational fluid dynamics (CFD) tools for free-surface flows in civil and environmental engineering. All simulations were performed with the academic research code ELBE (efficient lattice boltzmann environment, http://www.tuhh.de/elbe). The ELBE code follows the supercomputing-on-the-desktop paradigm and is especially designed for local supercomputing, without tedious accesses t...

  12. Civil Servants’ Salary Structure

    OpenAIRE

    Faiz Bilquees

    2006-01-01

    The paper looks at the trends in nominal and real salaries of the Federal Government employees over the period 1990-2006. It examines the structural defects in the existing salary structure and the anomalies in the allowances structure to show that appropriate remuneration for the civil servants requires serious and urgent consideration. The widening gap in the emoluments of government employees versus the public sector corporations and private sector employees has a strong bearing on the mot...

  13. Self-powered sensory nerve system for civil structures using hybrid forisome actuators

    Science.gov (United States)

    Shoureshi, Rahmat A.; Shen, Amy

    2006-03-01

    In order to provide a true distributed sensor and control system for civil structures, we have developed a Structural Nervous System that mimics key attributes of a human nervous system. This nervous system is made up of building blocks that are designed based on mechanoreceptors as a fundamentally new approach for the development of a structural health monitoring and diagnostic system that utilizes the recently discovered plant-protein forisomes, a novel non-living biological material capable of sensing and actuation. In particular, our research has been focused on producing a sensory nervous system for civil structures by using forisomes as the mechanoreceptors, nerve fibers, neuronal pools, and spinocervical tract to the nodal and central processing units. This paper will present up to date results of our research, including the design and analysis of the structural nervous system.

  14. Fault Tolerant Control for Civil Structures Based on LMI Approach

    Directory of Open Access Journals (Sweden)

    Chunxu Qu

    2013-01-01

    Full Text Available The control system may lose the performance to suppress the structural vibration due to the faults in sensors or actuators. This paper designs the filter to perform the fault detection and isolation (FDI and then reforms the control strategy to achieve the fault tolerant control (FTC. The dynamic equation of the structure with active mass damper (AMD is first formulated. Then, an estimated system is built to transform the FDI filter design problem to the static gain optimization problem. The gain is designed to minimize the gap between the estimated system and the practical system, which can be calculated by linear matrix inequality (LMI approach. The FDI filter is finally used to isolate the sensor faults and reform the FTC strategy. The efficiency of FDI and FTC is validated by the numerical simulation of a three-story structure with AMD system with the consideration of sensor faults. The results show that the proposed FDI filter can detect the sensor faults and FTC controller can effectively tolerate the faults and suppress the structural vibration.

  15. Impact of operating experience on design of civil structures - An overview

    International Nuclear Information System (INIS)

    During the past twenty years, Ontario Hydro has expanded its nuclear power to provide about one third of the electricity used in the province (coal and water powered stations provide the other two thirds). By 1992, the total installed capacity of nuclear generating stations in Ontario will further rise to over 14,000 MW. In common with other power plant design, the layout and structural design of civil facilities for a nuclear generating station are developed from consideration of functional, safety and operational requirements, as well as from past operating experience. Experience on structural performance in the sixteen units of Pickering and Bruce NGS's includes: piping and machinery vibrations, structural fatigue failures, and structural integrity due to extreme loadings not considered in the original design. The operating experience of Ontario Hydro's nuclear stations also indicates that civil structures are subjected to some degree of corrosion or degradation of certain elements similar to other mechanical components in a power station. This category of problems consists of concerns associated with thermal effects on concrete structures due to inoperative cooling system, cracking of concrete, and reliability of elastomeric seal materials at expansion joints of the containment envelop. This paper presents an overview of the operating problems and issues regarding changes in the licensing requirements related to civil structures and supporting systems of major mechanical components. The impact of these generic experience on the design of retrofits and new generating stations is also described in the paper

  16. Architectural Engineering to Super-Light Structures

    DEFF Research Database (Denmark)

    Castberg, Niels Andreas

    with architectural engineering as a starting point. The thesis is based on a two stringed hypothesis: Architectural engineering gives rise to better architecture and Super-Light Structures support and enables a static, challenging architecture. The aim of the thesis is to clarify architectural engineering's impact...... on the work process between architects and engineers in the design development. Using architectural engineering, Super-Light Structures are examined in an architectural context, and it is explained how digital tools can support architectural engineering and design of Super-Light Structures. The experiences...... to be subjects of examination for this thesis. The research results show that architectural engineering has a significant impact on a design process. The projects illustrate that simple explanations, underpinned by visualisations of the challenges between shape versus structure, often creates a shared...

  17. Cold Vacuum Drying facility civil structural system design description (SYS 06)

    Energy Technology Data Exchange (ETDEWEB)

    PITKOFF, C.C.

    1999-07-06

    This document describes the Cold Vacuum Drying (CVD) Facility civil - structural system. This system consists of the facility structure, including the administrative and process areas. The system's primary purpose is to provide for a facility to house the CVD process and personnel and to provide a tertiary level of containment. The document provides a description of the facility and demonstrates how the design meets the various requirements imposed by the safety analysis report and the design requirements document.

  18. Cold Vacuum Drying facility civil - structural system design description (SYS 06)

    International Nuclear Information System (INIS)

    This document describes the Cold Vacuum Drying (CVD) Facility civil - structural system. This system consists of the facility structure, including the administrative and process areas. The system's primary purpose is to provide for a facility to house the CVD process and personnel and to provide a tertiary level of containment. The document provides a description of the facility and demonstrates how the design meets the various requirements imposed by the safety analysis report and the design requirements document

  19. Hardware-software system for simulating and analyzing earthquakes applied to civil structures

    OpenAIRE

    J. P. Amezquita-Sanchez; Osornio-Rios, R. A.; Romero-Troncoso, R. J.; Dominguez-Gonzalez, A.

    2012-01-01

    The occurrence of recent strong earthquakes, the incessant worldwide movements of tectonic plates and the continuous ambient vibrations caused by traffic and wind have increased the interest of researchers in improving the capacity of energy dissipation to avoid damages to civil structures. Experimental testing of structural systems is essential for the understanding of physical behaviors and the building of appropriate analytic models in order to expose difficulties that may not have been co...

  20. Research on Geographic Information System Teaching in Civil Engineering%土木工程专业地理信息系统课程教学研究

    Institute of Scientific and Technical Information of China (English)

    赵健赟

    2013-01-01

    Based on the introduction of GIS, this paper analyzes the necessity of opening GIS course to civil engineering personnel training, and discusses contents of the courses combining with specialties of the modern civil engineering. The paper researches the theory didactical methods of GIS, and indicates using various kinds of teaching methods and modem education technologies to improve the teaching effect, in allusion to the characteristics of civil engineering students'knowledge structures. The paper discusses the signif icance of GIS experiment teaching, and puts forward that different hierarchical experiment items and approach should be used to im prove students'application abilities combining with the applications teaching methods. Finally, the paper analyzes the evaluation meth ods for the purpose of emphasizing the application and usual study, and the effective ways to ensure the GIS teaching quality of civil engineering.%在介绍GIS在土木工程应用的基础上,结合现代土木工程特点,分析了在土木工程人才培养中开设GIS课程的必要性,探讨了其教学内容.针对土木工程专业学生知识面的特点研究了GIS理论教学的方法,提出综合应用各种教学方法和现代教育技术,以改善教学效果.阐述了GIS实验教学的重要性,结合应用型GIS教学方法,提出了不同层次的实验项目和提高学生应用能力的途径.论述了以突出应用能力培养和平时学习效果为目的的考核方法,研究了针对土木专业GIS教学质量保障的有效途径.

  1. The Effect of Rotor Cruise Tip Speed, Engine Technology and Engine/Drive System RPM on the NASA Large Civil Tiltrotor (LCTR2) Size and Performance

    Science.gov (United States)

    Robuck, Mark; Wilkerson, Joseph; Maciolek, Robert; Vonderwell, Dan

    2012-01-01

    A multi-year study was conducted under NASA NNA06BC41C Task Order 10 and NASA NNA09DA56C task orders 2, 4, and 5 to identify the most promising propulsion system concepts that enable rotor cruise tip speeds down to 54% of the hover tip speed for a civil tiltrotor aircraft. Combinations of engine RPM reduction and 2-speed drive systems were evaluated. Three levels of engine and the drive system advanced technology were assessed; 2015, 2025 and 2035. Propulsion and drive system configurations that resulted in minimum vehicle gross weight were identified. Design variables included engine speed reduction, drive system speed reduction, technology, and rotor cruise propulsion efficiency. The NASA Large Civil Tiltrotor, LCTR, aircraft served as the base vehicle concept for this study and was resized for over thirty combinations of operating cruise RPM and technology level, quantifying LCTR2 Gross Weight, size, and mission fuel. Additional studies show design sensitivity to other mission ranges and design airspeeds, with corresponding relative estimated operational cost. The lightest vehicle gross weight solution consistently came from rotor cruise tip speeds between 422 fps and 500 fps. Nearly equivalent results were achieved with operating at reduced engine RPM with a single-speed drive system or with a two-speed drive system and 100% engine RPM. Projected performance for a 2025 engine technology provided improved fuel flow over a wide range of operating speeds relative to the 2015 technology, but increased engine weight nullified the improved fuel flow resulting in increased aircraft gross weights. The 2035 engine technology provided further fuel flow reduction and 25% lower engine weight, and the 2035 drive system technology provided a 12% reduction in drive system weight. In combination, the 2035 technologies reduced aircraft takeoff gross weight by 14% relative to the 2015 technologies.

  2. Understanding structural engineering from theory to practice

    CERN Document Server

    Chen, Wai-Fah

    2011-01-01

    In our world of seemingly unlimited computing, numerous analytical approaches to the estimation of stress, strain, and displacement, including analytical, numerical, physical, and analog techniques, have greatly advanced the practice of engineering. Combining theory and experimentation, computer simulation has emerged as a third path for engineering design and performance evaluation. As a result, structural engineers working in the practical world of engineering must apply, and ideally, thrive, on these idealizations of science-based theories. Analyzing the major achievements in the field, Und

  3. Reliability-Based Optimization in Structural Engineering

    DEFF Research Database (Denmark)

    Enevoldsen, I.; Sørensen, John Dalsgaard

    1994-01-01

    In this paper reliability-based optimization problems in structural engineering are formulated on the basis of the classical decision theory. Several formulations are presented: Reliability-based optimal design of structural systems with component or systems reliability constraints, reliability...

  4. Civilizing Processes

    OpenAIRE

    Dolan, Paddy

    2011-01-01

    The theory of “civilizing processes” was developed by Norbert Elias in the 1930s to describe and explain the generation of higher standards of various forms of conduct in the context of unplanned but structured changes in state formation and lengthening chains of social interdependencies (Elias 2000). The idea of civilized conduct may seem a strange companion to popular understandings of consumer culture, when the latter phrase is often associated with hedonism, individualism and excess. But ...

  5. How Much Is Enough? Examining Computer Science and Civil Engineering Citation Data to Inform Collection Development and Retention Decisions in Three Large Canadian University Libraries

    Science.gov (United States)

    Spence, Michelle; Mawhinney, Tara; Barsky, Eugene

    2012-01-01

    Science and engineering libraries have an important role to play in preserving the intellectual content in research areas of the departments they serve. This study employs bibliographic data from the Web of Science database to examine how much research material is required to cover 90% of faculty citations in civil engineering and computer…

  6. Seismic re-evaluation of Mochovce nuclear power plant. Seismic reevaluation of civil structures

    International Nuclear Information System (INIS)

    In this contribution, an overview of seismic design procedures used for reassessment of seismic safety of civil structures at the Mochovce NPP in Slovak Republic presented. As an introduction, the objectives, history, and current status of seismic design of the NPP have been explained. General philosophy of design methods, seismic classification of buildings, seismic data, calculation methods, assumptions on structural behavior under seismic loading and reliability assessment were described in detail in the subsequent section. Examples of calculation models used for dynamic calculations of seismic response are given in the last section. (author)

  7. Advanced finite element method in structural engineering

    CERN Document Server

    Long, Yu-Qiu; Long, Zhi-Fei

    2009-01-01

    This book systematically introduces the research work on the Finite Element Method completed over the past 25 years. Original theoretical achievements and their applications in the fields of structural engineering and computational mechanics are discussed.

  8. Steels from materials science to structural engineering

    CERN Document Server

    Sha, Wei

    2013-01-01

    Steels and computer-based modelling are fast growing fields in materials science as well as structural engineering, demonstrated by the large amount of recent literature. Steels: From Materials Science to Structural Engineering combines steels research and model development, including the application of modelling techniques in steels.  The latest research includes structural engineering modelling, and novel, prototype alloy steels such as heat-resistant steel, nitride-strengthened ferritic/martensitic steel and low nickel maraging steel.  Researchers studying steels will find the topics vital to their work.  Materials experts will be able to learn about steels used in structural engineering as well as modelling and apply this increasingly important technique in their steel materials research and development. 

  9. Structural engineering of three-dimensional phononic crystals

    Science.gov (United States)

    Delpero, Tommaso; Schoenwald, Stefan; Zemp, Armin; Bergamini, Andrea

    2016-02-01

    Artificially-structured materials are attracting the research interest of a growing community of scientists for the possibility to develop novel materials with advantageous properties that arise from the ability to tailor the propagation of elastic waves, and thus energy, through them. In this work, we propose a three-dimensional phononic crystal whose unit cell has been engineered to obtain a strong wave-attenuation band in the middle of the acoustic frequency range. The combination of its acoustic properties with the dimensions of the unit cell and its static mechanical properties makes it an interesting material for possibly several applications in civil and mechanical engineering, for instance as the core of an acoustically insulating sandwich panel. A sample of this crystal has been manufactured and experimentally tested with respect to its acoustic transmissibility. The performance of the phononic crystal core is remarkable both in terms of amplitude reduction in the transmissibility and width of the attenuation band. A parametric study has been finally conducted on selected geometrical parameters of the unit cell and on their effect on the macroscopic properties of the crystal. This work represents an application-oriented example of how the macroscopic properties of an artificially-structured material can be designed, according to specific needs, by a conventional engineering of its unit cell.

  10. Inquiry on civil construction technology points of building engineering%建筑工程土建施工技术要点探究

    Institute of Scientific and Technical Information of China (English)

    赵成学

    2015-01-01

    依照建筑工程土建的施工要求,简单的总结了建筑工程土建施工的关键技术要点,主要包括混凝土施工、钢筋施工、砖砌筑施工、防水施工、模板施工五方面内容,以期达到提升建筑工程土建施工技术性能的目的。%According to civil construction demands of building engineering,the paper briefly summarizes critical civil construction technology points of building engineering,which mainly includes concrete construction,steel construction,brick masonry construction,waterproofing construc-tion and template construction,with a view to achieve the goal of improving civil construction technology performance of building engineering.

  11. Sustainable Development Strategy of Civil Engineering%土木工程可持续发展战略浅析

    Institute of Scientific and Technical Information of China (English)

    杨跃

    2013-01-01

      伴随着社会经济的发展,现代科学日益进步,土木工程得到了长足的发展,在快速的发展过程中,不可避免的对经济发展环境造成了相当大的影响。通过对土木工程发展的审视,我们发现,我们正面临着一个伴随着国民经济飞跃的土木工程大发展的大好时期。而且这样一个优良的发展环境已经受到并将继续受到世界所有国家的关注。但是我们需要注意的是要实现人类同环境的协调发展,创造美好家,就要走可持续发展的道路。随着国家对以基础设施建设力度的加大,工业与民用建筑,矿山建设,公路建设得到迅猛发展,造成的对环境的影响越来越受到社会的关注。基础建设对社会和经济的发展有着非常重要的带动作用,但它同时产生对破坏环境产生严重影响。此,如何在土木工程建设发展的同时,保护生态环境,节约土地,并处理好同社会、经济的关系,进而实现可持续发展,是一个值得我们仔细研究的课题。%With the social and economic development and modern science and technology increasingly advanced, civil engineering has been considerable development. In the process of rapid development, it is inevitable to bring huge influence on the environment of economic development. Through reviewing the development of civil engineering, we find that now it is a good time that the civil engineering develops with the development of national economy. The good development environment has attracted the attention from the globe. To realize the harmonious development of human being and environment and build beautiful homes, we should adhere to the path of sustainable development. With the increase of the state of infrastructure construction, industrial and civil construction, mine construction, and highway construction has obtained the rapid development, the impact on the environment attracts more and more

  12. News in engineering education in Spain effective from 2010 in presence of external changes and mixed crisis, looking mostly to agro and civil engineers

    Science.gov (United States)

    Anton, J. M.; Sanchez, M. E.; Grau, J. B.; Andina, D.

    2012-04-01

    The engineering careers models were diverse in Europe, and are adopting now in Spain the Bolonia process for European Universities. Separated from older Universities, that are in part technically active, Civil Engineering (Caminos, Canales y Puertos) started at end of 18th century in Spain adopting the French models of Upper Schools for state civil servants with exam at entry. After 1800 intense wars, to conserve forest regions Ingenieros de Montes appeared as Upper School, and in 1855 also the Ingenieros Agrónomos to push up related techniques and practices. Other Engineers appeared as Upper Schools but more towards private factories. These ES got all adapted Lower Schools of Ingeniero Tecnico. Recently both grew much in number and evolved, linked also to recognized Professions. Spanish society, into European Community, evolved across year 2000, in part highly well, but with severe discordances, that caused severe youth unemployment with 2008-2011 crisis. With Bolonia process high formal changes step in from 2010-11, accepted with intense adaptation. The Lower Schools are changing towards the Upper Schools, and both that have shifted since 2010-11 various 4-years careers (Grado), some included into the precedent Professions, and diverse Masters. Acceptation of them to get students has started relatively well, and will evolve, and acceptation of new grades for employment in Spain, Europe or outside will be essential. Each Grado has now quite rigid curricula and programs, MOODLE was introduced to connect pupils, some specific uses of Personal Computers are taught in each subject. Escuela de Agronomos centre, reorganized with its old name in its precedent buildings at entrance of Campus Moncloa, offers Grados of Agronomic Engineering and Science for various public and private activities for agriculture, Alimentary Engineering for alimentary activities and control, Agro-Environmental Engineering more related to environment activities, and in part Biotechnology also

  13. Hardware-software system for simulating and analyzing earthquakes applied to civil structures

    Directory of Open Access Journals (Sweden)

    J. P. Amezquita-Sanchez

    2012-01-01

    Full Text Available The occurrence of recent strong earthquakes, the incessant worldwide movements of tectonic plates and the continuous ambient vibrations caused by traffic and wind have increased the interest of researchers in improving the capacity of energy dissipation to avoid damages to civil structures. Experimental testing of structural systems is essential for the understanding of physical behaviors and the building of appropriate analytic models in order to expose difficulties that may not have been considered in analytical studies. This paper presents a hardware-software system for exciting, monitoring and analyzing simultaneously a structure under earthquake signals and other types of signals in real-time. Effectiveness of the proposed system has been validated by experimental case studies and has been found to be a useful tool in the analysis of earthquake effects on structures.

  14. Re-engineering organizations for optimal deployment of smart materials and intelligent devices in civil infrastructure

    Science.gov (United States)

    El-Diraby, Tamer E.; Beheshti, Arzhang

    2002-06-01

    Smart materials and intelligent devices are promising to revolutionize data collection in civil infrastructure. However, their application has so far been very limited in scope. So far, there is no comprehensive mechanisms to integrate data generated by smart materials and intelligent devices into the overall IT systems of user organizations. This article outlines a framework for reengineering organizations for optimal utilization of smart materials and intelligent devices in the infrastructure development domain. The aim is to integrate data collection and management into the organizational culture. The framework includes three basic modules: assessing current practice, identifying level of deployment, and defining the needed actions.

  15. Use of the Colorado SURGE System for Continuing Education for Civil Engineers.

    Science.gov (United States)

    Fead, J. W. N.

    The Colorado State University Resources in Graduate Education (SURGE) program is described in this report. Since it is expected that not all the participants in a graduate engineering program will be able to attend university-based lectures, presentations are video-taped and transported to industrial plants, engineering offices, and other…

  16. Successfully Managing the Experimental Area of a Large Physics Experiment from Civil Engineering to the First Beams

    CERN Document Server

    Butin, F

    2010-01-01

    The role of "Experimental Area Manager" supported by a well organized, charismatic and motivated team is absolutely essential for managing the huge effort needed for a multi-cultural, multi-disciplinary installation of cathedral-size underground caverns housing a billion dollar physics experiment. Between the years 2002 and 2008, we supervised and coordinated the ATLAS work site at LHC, from the end of the civil engineering to the first circulating beams, culminating with 240 workers on the site, 24 hours a day, 7 days a week, with activities taking place simultaneously on the surface, in the 60 m shafts and in the 100 m underground experimental cavern. We depict the activities preparation scheme (including tasks ranging from the installation of 280 ton cranes to super-delicate silicon detectors), the work-site organization method, the safety management that was a top priority throughout the whole project, and the opencommunication strategy that required maintaining permanent public visits. The accumulation o...

  17. Point 5 - civil engineering : SX5, SX, travelling cranes, trucks, CMS modules, surface views, pit PX

    CERN Multimedia

    1995-01-01

    > de 00:00 à 14:00 le 09 décembre 1995 Forage et carottage du sous-sol pour connaître l’état du terrain pour les futurs travaux souterrains de Génie Civil > de 14:01 à 19:15mn le 03 février 1997 Sondage et carottage dans le tunnel LEP/LHC vers le point2 > de 19 :16 à 38 :00mn le 13 juin 1997 Construction d’une galerie souterraine de liaison et du nouveau bâtiment de ventilation SU ?? sur le site du Point5 Vues du point5 avant l’agrandissement du site pour CMS

  18. Structural Health Monitoring of Civil Infrastructure Using Optical Fiber Sensing Technology: A Comprehensive Review

    OpenAIRE

    Ye, X. W.; Su, Y. H.; Han, J. P.

    2014-01-01

    In the last two decades, a significant number of innovative sensing systems based on optical fiber sensors have been exploited in the engineering community due to their inherent distinctive advantages such as small size, light weight, immunity to electromagnetic interference (EMI) and corrosion, and embedding capability. A lot of optical fiber sensor-based monitoring systems have been developed for continuous measurement and real-time assessment of diversified engineering structures such as b...

  19. ARMA modelled time-series classification for structural health monitoring of civil infrastructure

    Science.gov (United States)

    Peter Carden, E.; Brownjohn, James M. W.

    2008-02-01

    Structural health monitoring (SHM) is the subject of a great deal of ongoing research leading to the capability that reliable remote monitoring of civil infrastructure would allow a shift from schedule-based to condition-based maintenance strategies. The first stage in such a system would be the indication of an extraordinary change in the structure's behaviour. A statistical classification algorithm is presented here which is based on analysis of a structure's response in the time domain. The time-series responses are fitted with Autoregressive Moving Average (ARMA) models and the ARMA coefficients are fed to the classifier. The classifier is capable of learning in an unsupervised manner and of forming new classes when the structural response exhibits change. The approach is demonstrated with experimental data from the IASC-ASCE benchmark four-storey frame structure, the Z24 bridge and the Malaysia-Singapore Second Link bridge. The classifier is found to be capable of identifying structural change in all cases and of forming distinct classes corresponding to different structural states in most cases.

  20. Imagerie par résonance magnétique appliquée aux matériaux du génie civil Magnetic Resonance Imaging Applied to Civil Engineering Materials

    Directory of Open Access Journals (Sweden)

    Coussot P.

    2006-12-01

    Full Text Available Un imageur par résonance magnétique dédié aux matériaux du génie civil et de la construction est actuellement en cours d'acquisition par le LCPC (Laboratoire Central des Ponts et Chaussées. Il sera géré par le LMSGC à Champs-sur-Marne et installé dans les locaux de l'IFI (Institut francilien d'Ingénierie. De nombreuses collaborations avec des laboratoires et des entreprises sont envisagées et certaines déjà mises en place. D'un point de vue général, les recherches concerneront les transferts et changements de phase dans les milieux granulaires et poreux. Une série de dispositifs de recherche complémentaire est à l'étude. Ceux-ci permettront de solliciter les échantillons (chauffage, refroidissement, écoulement, transfert, fissuration tout en réalisant des images de la structure interne. Ceci nous permettra de mettre en relation les propriétés macroscopiques des matériaux et leurs évolutions au niveau mésoscopique. A magnetic resonance imager for use with civil engineering and construction materials is being acquired by the LCPC (Laboratoire Central des Ponts et Chaussées. It will be managed by the LMSGC at Champs-sur-Marne and will be installed on the premises of the IFI (Institut francilien d'Ingénierie. Numerous joint projects between laboratories and industry are contemplated and some are already under way. The general outlook for these research projects is to study transfers and phase changes in granular porous media. A number of supplementary research devices are being studied. These devices will make it possible to submit samples to heating, cooling, flow, transfer and fissuring while recording images of their internal structure. This will allow us to discover the relationship between the macroscopic properties of materials and mesoscopic changes.

  1. A modular backend computing system for continuous civil structural health monitoring

    Science.gov (United States)

    Chien, Ting-Chou; Huo, Chengjia; Chou, Pai H.

    2014-04-01

    This paper describes a computing backend for a water pipe monitoring system. Today, most such systems are divided into event-triggered and continuous monitoring, but they all lack systematic handling of data. Many systems simply store data in files with specific naming conventions and ad hoc formats, making them difficult to retrieve, maintain, disseminate, and analyze. To address these problems, our backend supports data management and dissemination. Unlike previous systems that store data in files or conventional databases before analysis, our modular architecture not only saves data in efficiently searchable ways by indexing as a baseline dataset but also detected events in discrete time manner and other processed data. To facilitate analysis, we design a plug-in structure to allow processing modules to perform inline processing and shorten detection time. For data dissemination, our architecture can compose multiple visualizations including geographical maps to create powerful tools to yield new insight into massive datasets. The backend system enables Internet web service for visualization, data management, and remote sensor control for better integration. Our system is applicable to not only water pipelines but also bridges and civil structures in general. Our proposed backend system has been implemented and validated through field deployment. One such system has been running for over 1.5 years and has collected millions of records to date. A Google Map integrated visualization service has been developed to demonstrate lively collected records in real-time. This is expected to be more helpful for better understanding of civil structures' behavior in the long term.

  2. Environmental impact assessment and eco-friendly decision-making in civil structures.

    Science.gov (United States)

    Kim, Sang-Hyo; Choi, Moon-Seock; Mha, Ho-Seong; Joung, Jung-Yeun

    2013-09-15

    This study develops two useful procedures in performing an environmental-impact assessment. One is the advanced life-cycle assessment (LCA) method, which effectively tracks the flow of materials and considers the recycling and demolition of a civil structure. The other is an eco-friendly decision-making procedure, which may effectively apply when determining the prototype of a civil structure. The advanced LCA method differs from traditional LCA procedure, as it classifies the input material prior to the impact assessment. Classification work is performed to establish independent life-cycle stages for each material. The processes of recycling and demolition are appropriately added to the life-cycle stages. The impact assessment is performed separately for the materials, and results are aggregated at the end of the analysis. The eco-friendly decision-making procedure enables designers to choose an economical, and environmentally friendly, alternative during the planning phase of the construction project. This procedure rationally amalgamates economical value and environmental effects into a single indicator. The life cycle cost (LCC) of a structure can be analysed by using conventional LCC tools, whereas the environmental impact is estimated by LCA. The results from LCC and LCA are then integrated by using either a CO2 conversion method or an analytical hierarchy process (AHP). The CO2 conversion method presents the result as a monetary value, whereas the AHP presents the result as a non-dimensional value. A practical example using a steel box girder bridge and a pre-stressed concrete (PSC) box-girder bridge is also given in order to aid the understanding of the presented procedure. PMID:23681357

  3. The hierarchical structure of chemical engineering

    Institute of Scientific and Technical Information of China (English)

    Mooson KWAUK

    2007-01-01

    Around the turn of the present century, scholars began to recognize chemical engineering as a complex system, and have been searching for a convenient point of entry for refreshing its knowledge base. From our study of the dynamic structures of dispersed particles in fluidization and the resulting multi-scale method, we have been attempting to extend our findings to structures prevailing in other multiphase systems as well as in the burgeoning industries producing functional materials. Chemical engineering itself is hierarchically structured. Besides structures based on space and time, such hierarchy could be built from ChE history scaled according to science content, or from ChE operation according to the expenditure of manpower and capital investment.

  4. The implementation of a multimedia learning environment for graduate civil engineers

    Directory of Open Access Journals (Sweden)

    Peter Jagodzinski

    1995-12-01

    Full Text Available Underlying our approach to the development of a Multimedia Learning Environment (MLE is the proposition that conventional learning needs analysis, for Computer-Based Learning does not address the richness of delivery possible with MLEs. We propose that knowledge-engineering techniques (from the field of Artificial Intelligence can provide a richer understanding of the domain, thus enabling a better MLE to be produced. The knowledge-engineering approach we have used, outlined in this paper, involved acquiring knowledge from a range of sources, then analysing this knowledge so that individual knowledge items could be categorized according to identified underlying knowledge-representation paradigms which each imply their own, most suitable, presentation style. This knowledge engineering analysis was then used to select an instructional model capable of conveying all the acquired types of knowledge in their paradigmatic styles, and detailed and adaptable enough to be implemented on a computer. The chosen model, the Cognitive Apprenticeship Model (CAM, was explicitly used as the basis for the architecture of the MLE.

  5. 工程教育背景下土木工程专业设计类课程探讨%Study on engineering design curriculums in civil engineering based-on engineering education

    Institute of Scientific and Technical Information of China (English)

    蔡靖; 赵方冉

    2012-01-01

    Based on the engineering education, five reform measures aiming at engineering design curriculums in civil engineering are proposed. They are setting up introductory lectures about engineering design curriculums, core knowledge integration, connection of practice curriculums, abiding by specifications and inspiring innovation and establishment of the curriculum group.%在工程教育背景下,针对土木工程建筑工程方向的工程设计类课程提出5项改革措施:开设专业设计类课程导论讲座,整合核心知识点,集中实践课程承上启下,遵循规范、鼓励创新,成立工程设计类课程小组.

  6. Vibration measurement through high speed vision system in a civil structure under impact loading

    Science.gov (United States)

    Ferrer, Belén; García, Juan I.; Roig, Ana B.; Mas, David

    2014-05-01

    The method presented in this work is a simple, cheap and non-contact method. It is based on image processing using a circular target. It has subpixel accuracy and it only needs a low cost high-speed camera and a tripod. In the work presented in this paper, a Casio Exilim camera was used to measure the vibration of a pedestrian bridge. An impact load was applied on the bridge through one person jumping in the middle of the bridge. Tracking of the circle border give the center trajectory and therefore the displacement and frequency of the movement. Some accelerometers were used as a contrast device for the frequency. The displacement obtained by our procedure was previously checked in laboratory using a micrometric bench. The results show that this method is suitable for measuring successfully the vibration of civil structures.

  7. SMC Concrete funds new undergraduate scholarship in College of Engineering

    OpenAIRE

    Gilbert, Karen

    2006-01-01

    Chris Houpos of Suffolk, Va., a junior majoring in civil and environmental engineering in the College of Engineering at Virginia Tech, is the recipient of the university's first SMC Concrete Scholarship. The scholarship is directed towards civil engineering students focusing on structural engineering and construction.

  8. A Brief Discuss on the Application of Calculus in Civil Engineering%浅谈微积分在土木工程上的应用

    Institute of Scientific and Technical Information of China (English)

    蔡颢

    2012-01-01

    In this Article, Based on briefly introduced the basic knowledge ofthe two disciplines of "calculus" and "civil en- gineering", comprehensive analysis of the intrinsic link between the two, and proposed the main application of the calculus in civil engineering subject area.%文章在简要介绍了微积分和土木工程两个学科基本知识的基础上,全面分析了两者的内在联系,并提出了微积分在土木工程学科领域的主要方面应用。

  9. A comparative study of oral health attitudes and behavior using the Hiroshima University-Dental Behavioral Inventory (HU-DBI) between dental and civil engineering students in Colombia.

    Science.gov (United States)

    Jaramillo, Jorge A; Jaramillo, Fredy; Kador, Itzjak; Masuoka, David; Tong, Liyue; Ahn, Chul; Komabayashi, Takashi

    2013-03-01

    The aim of this study was to use the Hiroshima University - Dental Behavioral Inventory (HU-DBI) to compare oral health attitudes and behavior of dental and civil engineering students in Colombia. The HU-DBI's survey consisting of twenty dichotomous responses (agree-disagree) regarding tooth brushing, was completed at University Antonio Narino for the dental students and the University of Cauca for the civil engineering students. The Spanish version of the HU-DBI questionnaire was taken by 182 of 247 dental students and 411 of 762 engineering students. The data was-statistically analyzed by the chi-square test and backward logistic regression. Compared to the engineering students, the dental students were more likely to agree with questions such as "I am bothered by the color of my gums"(OR = 2.2, 95% CI: 1.3-3.7),"I think I can clean my teeth well without using toothpaste" (OR = 3.0, 95% CI: 1.5-5.9), "I have used a dye to see how clean my teeth are" (OR = 2.9, 95% CI: 1.9-4.3), and "I have had my dentist tell me that I brush very well" (OR = 2.0, 95% CI: 1.3-3.1). The dental education curriculum in a dental school compared to a civil engineering school in Colombia indicated that a three-phase curriculum in didactics and clinics increased oral health attitudes and behavior from entry to graduation.

  10. ENVIRONMENTAL PROTECTION IN CIVIL ENGINEERING WITH REGARD TO THE USE OF ECO AND NANO MATERIALS

    OpenAIRE

    PETROVIC MILOS Z.; DJORIC-VELJKOVIC SNEZANA M.; KARAMARKOVIC JUGOSLAV P.

    2015-01-01

    The looks of any environment, the identity of which is expressed through its form, structure and color, is one of the most significant characteristics of any area. The first structures that catch the observer's eye are buildings and urban structures. People have always attached importance to the choice of building materials and interior design. Materials used have been specific for certain regions. In the era of modern technology and the expansion of new technical advances, the man and his en...

  11. Experimental Investigation of the Effects of Reverse Bending and Straightening Process on Carbon Steel Bars used for Civil Engineering Applications

    Directory of Open Access Journals (Sweden)

    Adewole, K. K.

    2014-01-01

    Full Text Available This paper presents an experimental investigation of the effects of reverse bending and straightening process on the mechanical properties of a typical carbon steel bar used for civil engineering applications. Twenty four specimens each were used for the metallogarphy, microhardness and tensile tests. The investigation revealed that the reverse bending and straightening process has no significant effect on the bars’ through-thickness microstructure and hardness. However, the reverse bending and straightening process reduces the yield load, ultimate load, and displacement at fracture of the bars by 4.27%, 2.58%, and 18.62% respectively. These results highlight the need to take into consideration the effects of the previous loading history of the bars/wires, particularly the reduction in the displacement at fracture and consequently, the ductility of the bars/wires in the design and fitness for purpose assessment of components made from them, since the bars/wires could experience high strain during installation and in service due to overloads.

  12. Academic Training Lecture Regular Programme: How Large-Scale Civil Engineering Projects Realise the Potential of a City

    CERN Multimedia

    2012-01-01

    How Large-Scale Civil Engineering Projects Realise the Potential of a City (1/3), by Bill Hanway (Excecutive Director of Operations, AECOM Europe).   Wednesday, June 6, 2012 from 11:00 to 12:00 (Europe/Zurich) at CERN ( 80-1-001 - Globe 1st Floor ) In this series of three special lectures, leading experts from AECOM would explore the impact of a trio of major projects on a single city. In common with every metropolis, London has run-down districts and infrastructure in need of upgrading. The lectures propose to cover three of the biggest challenges: regenerating run-down areas; reducing congestion and transporting people more efficiently; and improving water and wastewater systems. Each project contributes to a collective public aim - to realise the potential of a growing city, and ensure its healthy, sustainable and competitive future. Lecture 1: Into the lecture series and The London 2012 Olympic Games Most cities share a group of common complex challenges – growing populations, agei...

  13. On Electronic Structure Engineering and Thermoelectric Performance

    OpenAIRE

    Jeong, Changwook; Lundstrom, Mark S.

    2011-01-01

    In this paper, we address the question of how to engineer the electronic structure to enhance the performance of a thermoelectric material. We examine several different materials and show that all of them, even those for which giant Seebeck coefficients have been predicted, display a value that is expected from conventional thermoelectric theory. For molecular thermoelectrics, we show that the detailed lineshape plays an important role. Finally, using III-V alloy semiconductors as a model sys...

  14. Design and testing of Ground Penetrating Radar equipment dedicated for civil engineering applications: ongoing activities in Working Group 1 of COST Action TU1208

    Science.gov (United States)

    Pajewski, Lara; Manacorda, Guido; Persico, Raffaele

    2015-04-01

    This work aims at presenting the ongoing research activities carried out in Working Group 1 'Novel GPR instrumentation' of the COST (European COoperation in Science and Technology) Action TU1208 'Civil Engineering Applications of Ground Penetrating Radar' (www.GPRadar.eu). The principal goal of the COST Action TU1208 is to exchange and increase scientific-technical knowledge and experience of GPR techniques in civil engineering, simultaneously promoting throughout Europe the effective use of this safe and non-destructive technique in the monitoring of infrastructures and structures. Working Group 1 (WG1) of the Action focuses on the development of innovative GPR equipment dedicated for civil engineering applications. It includes three Projects. Project 1.1 is focused on the 'Design, realisation and optimisation of innovative GPR equipment for the monitoring of critical transport infrastructures and buildings, and for the sensing of underground utilities and voids.' Project 1.2 is concerned with the 'Development and definition of advanced testing, calibration and stability procedures and protocols, for GPR equipment.' Project 1.3 deals with the 'Design, modelling and optimisation of GPR antennas.' During the first year of the Action, WG1 Members coordinated between themselves to address the state of the art and open problems in the scientific fields identified by the above-mentioned Projects [1, 2]. In carrying our this work, the WG1 strongly benefited from the participation of IDS Ingegneria dei Sistemi, one of the biggest GPR manufacturers, as well as from the contribution of external experts as David J. Daniels and Erica Utsi, sharing with the Action Members their wide experience on GPR technology and methodology (First General Meeting, July 2013). The synergy with WG2 and WG4 of the Action was useful for a deep understanding of the problems, merits and limits of available GPR equipment, as well as to discuss how to quantify the reliability of GPR results. An

  15. A route to possible civil engineering materials: the case of high-pressure phases of lime

    Science.gov (United States)

    Bouibes, A.; Zaoui, A.

    2015-07-01

    Lime system has a chemical composition CaO, which is known as thermodynamically stable. The purpose here is to explore further possible phases under pressure, by means of variable-composition ab initio evolutionary algorithm. The present investigation shows surprisingly new stable compounds of lime. At ambient pressure we predict, in addition to CaO, CaO2 as new thermodynamically stable compound. The latter goes through two phases transition from C2/c space group structure to Pna21 at 1.5 GPa, and Pna21 space group structure to I4/mcm at 23.4 GPa. Under increasing pressure, further compounds such as CaO3 become the most stable and stabilize in P-421m space group structure above 65 GPa. For the necessary knowledge of the new predicted compounds, we have computed their mechanical and electronic properties in order to show and to explain the main reasons leading to the structural changes.

  16. A route to possible civil engineering materials: the case of high-pressure phases of lime.

    Science.gov (United States)

    Bouibes, A; Zaoui, A

    2015-07-23

    Lime system has a chemical composition CaO, which is known as thermodynamically stable. The purpose here is to explore further possible phases under pressure, by means of variable-composition ab initio evolutionary algorithm. The present investigation shows surprisingly new stable compounds of lime. At ambient pressure we predict, in addition to CaO, CaO2 as new thermodynamically stable compound. The latter goes through two phases transition from C2/c space group structure to Pna21 at 1.5 GPa, and Pna21 space group structure to I4/mcm at 23.4 GPa. Under increasing pressure, further compounds such as CaO3 become the most stable and stabilize in P-421m space group structure above 65 GPa. For the necessary knowledge of the new predicted compounds, we have computed their mechanical and electronic properties in order to show and to explain the main reasons leading to the structural changes.

  17. An Empirical Exploration of Metacognitive Assessment Activities in a Third-Year Civil Engineering Hydraulics Course

    Science.gov (United States)

    Meyer, Jan H. F.; Knight, David B.; Callaghan, David P.; Baldock, Tom E.

    2015-01-01

    Threshold concepts are transformative, integrative, and provocative; understanding these difficult concepts allows students to be capable of solving advanced problems. This investigation and evaluation of a metacognitive curricular approach explore variation in students' and teachers' discernment of structural complexity of concepts and its…

  18. Knowledge creation and innovation in a civil engineering course for the first-year university students

    Science.gov (United States)

    Salmisto, Alpo; Nokelainen, Petri

    2015-09-01

    This article examines the application of knowledge creation learning and innovation to higher education in construction. The objectives are to demonstrate the application of the course based on knowledge creation learning to mass teaching and to analyse whether knowledge creation learning improves student motivation and learning. The empirical data (n = 120) consist of the results of a student survey from two university-level courses. The first course, Basics of Construction Management and Economics (n = 79), was developed on the basis of knowledge creation, and the second course, Building Project (n = 41), was implemented using the case-based learning method. The results, based on student self-assessments, showed that case-based learning supported the learning process more effectively than did the course based on knowledge creation. On the other hand, the results showed the relevance of applying knowledge creation-based learning to the mass teaching of construction in higher education. The findings of this empirical study suggest that more attention should focus on developing students' metacognitive skills in engineering education.

  19. Aligned carbon nanotube based ultrasonic microtransducers for durability monitoring in civil engineering

    OpenAIRE

    LEBENTAL, Bérengère; Chainais, Pierre; CHENEVIER, Pascale; Chevalier, Nicolas; Delevoye, Eric; Fabbri, Jean-Marc; Nicoletti, Sergio; Renaux, Philippe; Ghis, Anne

    2011-01-01

    International audience Structural health monitoring of porous materials such as concrete is becoming a major component in our resource-limited economy, as it conditions durable exploitation of existing facilities. Durability in porous materials depends on nanoscale features which need to be monitored in situ with nanometric resolution. To address this problem, we put forward an approach based on the development of a new nanosensor, namely a capacitive micrometric ultrasonic transducer whos...

  20. A novel technique for acoustic emission monitoring in civil structures with global fiber optic sensors

    Science.gov (United States)

    Verstrynge, E.; Pfeiffer, H.; Wevers, M.

    2014-06-01

    The application of acoustic emission (AE)-based damage detection is gaining interest in the field of civil structural health monitoring. Damage progress can be detected and located in real time and the recorded AEs hold information on the fracture process which produced them. One of the drawbacks for on-site application in large-scale concrete and masonry structures is the relatively high attenuation of the ultrasonic signal, which limits the detection range of the AE sensors. Consequently, a large number of point sensors are required to cover a certain area. To tackle this issue, a global damage detection system, based on AE detection with a polarization-modulated, single mode fiber optic sensor (FOS), has been developed. The sensing principle, data acquisition and analysis in time and frequency domain are presented. During experimental investigations, this AE-FOS is applied for the first time as a global sensor for the detection of crack-induced AEs in a full-scale concrete beam. Damage progress is monitored during a cyclic four-point bending test and the AE activity, detected with the FOS, is related to the subsequent stages of damage progress in the concrete element. The results obtained with the AE-FOS are successfully linked to the mechanical behavior of the concrete beam and a qualitative correspondence is found with AE data obtained by a commercial system.

  1. A novel technique for acoustic emission monitoring in civil structures with global fiber optic sensors

    International Nuclear Information System (INIS)

    The application of acoustic emission (AE)-based damage detection is gaining interest in the field of civil structural health monitoring. Damage progress can be detected and located in real time and the recorded AEs hold information on the fracture process which produced them. One of the drawbacks for on-site application in large-scale concrete and masonry structures is the relatively high attenuation of the ultrasonic signal, which limits the detection range of the AE sensors. Consequently, a large number of point sensors are required to cover a certain area. To tackle this issue, a global damage detection system, based on AE detection with a polarization-modulated, single mode fiber optic sensor (FOS), has been developed. The sensing principle, data acquisition and analysis in time and frequency domain are presented. During experimental investigations, this AE-FOS is applied for the first time as a global sensor for the detection of crack-induced AEs in a full-scale concrete beam. Damage progress is monitored during a cyclic four-point bending test and the AE activity, detected with the FOS, is related to the subsequent stages of damage progress in the concrete element. The results obtained with the AE-FOS are successfully linked to the mechanical behavior of the concrete beam and a qualitative correspondence is found with AE data obtained by a commercial system. (papers)

  2. The hierarchical structure of chemical engineering

    Institute of Scientific and Technical Information of China (English)

    Mooson; KWAUK

    2007-01-01

    Around the turn of the present century,scholars began to recognize chemical engineering as a com-plex system,and have been searching for a convenient point of entry for refreshing its knowledge base.From our study of the dynamic structures of dispersed particles in fluidization and the resultingmulti-scale method,we have been attempting to extend our findings to structures prevailing in othermultiphase systems as well as in the burgeoning industries producing functional materials.Chemicalengineering itself is hierarchically structured.Besides structures based on space and time,such hier-archy could be built from ChE history scaled according to science content,or from ChE operation ac-cording to the expenditure of manpower and capital investment.

  3. Investigation on the civil engineer society in USA%关于美国土木工程师学会的调研

    Institute of Scientific and Technical Information of China (English)

    中国土木工程学会

    2003-01-01

    @@ 一、ASCE的创立 美国土木工程师学会(the American Society of Civil Engineering,ASCE)是一个代表了123,000多名工程师的专业组织.1852年11月5日,James Laurie(18111875)等12名工程师在Croton Aqueduct建立了美国土木工程师学会的前身--美国土木工程师与建筑师学会(the American Societyof Civil Engineer and Architects),为ASCE奠定了坚实的基础.今天ASCE已经成为世界上最杰出的工程学会之一,在2002年,ASCE将迎来150周年庆典.

  4. Problems in Civil Engineering Cost Management and Measures%土建工程造价管理存在的问题及措施分析

    Institute of Scientific and Technical Information of China (English)

    阮立娟

    2014-01-01

    At present, accompanied by an expansion of the scale in civil engineering and construction, civil engineering cost management has gradually been put on the agenda. This paper discusses the main problems in cost management in the current period, and puts forward the corresponding measures to solve the problem accordingly.%现阶段,伴随土木建筑工程规模的日益扩大,土建工程的造价管理逐渐被提上议事日程。本文主要针对当前一个时期内造价管理的主要问题进行论述,据此提出相应的解决问题的措施。

  5. On management and control over construction progress in civil engineering programs%土建工程的施工进度管理和控制

    Institute of Scientific and Technical Information of China (English)

    刘斌

    2015-01-01

    The paper analyzes the factors influencing the construction progress management of civil engineering projects,and points out some sug-gestions for the preparation before the construction,compilation progress plan,and improvement of management regulations,so as to promote the construction progress management level of the civil engineering projects.%分析了影响土建工程施工进度管理的各项因素,针对施工进度管理中存在的问题,提出了做好开工前的准备工作、编制进度计划、完善项目管理法规体系等建议,以有效提高土建工程施工进度管理水平。

  6. Ndt in Civil Engineering: Experience and Results of the for 384 Research Group

    Science.gov (United States)

    Wiggenhauser, H.; Reinhardt, H. W.

    2010-02-01

    The FOR 384 research group in Germany was funded by the German Science Foundation (DFG) from 2001 to 2007 for research in Non-destructive Evaluation of Concrete Structures using Acoustic and Electro-Magnetic Echo-Methods. Seven institutes in Germany submitted a research proposal and a work plan in the areas Ultrasonics, Impact-Echo, Ground Penetrating Radar, Signal Processing and Validation. Laboratory studies, site tests and simulation and modelling were equally important research areas of this research group. A few selected results of this research group are summarized in this presentation.

  7. A route to possible civil engineering materials: the case of high-pressure phases of lime

    OpenAIRE

    A. Bouibes; Zaoui, A.

    2015-01-01

    Lime system has a chemical composition CaO, which is known as thermodynamically stable. The purpose here is to explore further possible phases under pressure, by means of variable-composition ab initio evolutionary algorithm. The present investigation shows surprisingly new stable compounds of lime. At ambient pressure we predict, in addition to CaO, CaO2 as new thermodynamically stable compound. The latter goes through two phases transition from C2/c space group structure to Pna21 at 1.5 GPa...

  8. Natural Frequencies and Modal Damping Ratios Identification of Civil Structures from Ambient Vibration Data

    Directory of Open Access Journals (Sweden)

    Minh-Nghi Ta

    2006-01-01

    Full Text Available Damping is a mechanism that dissipates vibration energy in dynamic systems and plays a key role in dynamic response prediction, vibration control as well as in structural health monitoring during service. In this paper a time domain and a time-scale domain approaches are used for damping estimation of engineering structures, using ambient response data only. The use of tests under ambient vibration is increasingly popular today because they allow to measure the structural response in service. In this paper we consider two engineering structures excited by ambient forces. The first structure is the 310 m tall TV tower recently constructed in the city of Nanjing in China. The second example concerns the Jinma cable-stayed bridge that connects Guangzhou and Zhaoqing in China. It is a single tower, double row cable-stayed bridge supported by 112 stay cables. Ambient vibration of each cable is carried out using accelerometers. From output data only, the modal parameter are extracted using a subspace method and the wavelet transform method.

  9. CAAD and Conceptual Design Collaboration between Architects and Structural Engineers

    OpenAIRE

    Luyten, Laurens

    2015-01-01

    Architectural design benefits from a design collaboration between architect and engineers that starts early in the design process. This paper presents a proposal for a new structural language developed to support an early design collaboration between architect and structural engineer. This language expresses the essential characteristics of the conceptual design of the structural engineer, and requires a limited amount of structural engineering knowledge for the architect to comprehend. The l...

  10. LEP Tunnel Movements at Point 1 caused by LHC Civil Engineering

    CERN Document Server

    Rammer, H

    2001-01-01

    The excavation of underground openings causes the surrounding ground to move towards the newly created opening. The magnitude of the movement is dependant of various factors, such as the shape and the size of the excavation, the geotechnical ground conditions, the in-situ ground stress, the distance from the excavation, etc. The excavation technique and the rock support measures are to be adapted to the prevailing ground conditions to limit the displacements to an acceptable level. From the output of the numerical analyses for the design of the underground structures, data can be obtained to determine the predicted movements. For the particular case of the LHC excavations at Point 1 in close proximity to the existing LEP tunnel, a facility had to be designed and installed in the LEP tunnel to allow adjustments of the machine alignment to compensate for the tunnel movements. The design was based on the predicted displacements, and the adequacy of the facility has been validated during excavation.

  11. Aligned carbon nanotube based ultrasonic microtransducers for durability monitoring in civil engineering.

    Science.gov (United States)

    Lebental, B; Chainais, P; Chenevier, P; Chevalier, N; Delevoye, E; Fabbri, J-M; Nicoletti, S; Renaux, P; Ghis, A

    2011-09-30

    Structural health monitoring of porous materials such as concrete is becoming a major component in our resource-limited economy, as it conditions durable exploitation of existing facilities. Durability in porous materials depends on nanoscale features which need to be monitored in situ with nanometric resolution. To address this problem, we put forward an approach based on the development of a new nanosensor, namely a capacitive micrometric ultrasonic transducer whose vibrating membrane is made of aligned single-walled carbon nanotubes (SWNT). Such sensors are meant to be embedded in large numbers within a porous material in order to provide information on its durability by monitoring in situ neighboring individual micropores. In the present paper, we report on the feasibility of the key building block of the proposed sensor: we have fabricated well-aligned, ultra-thin, dense SWNT membranes that show above-nanometer amplitudes of vibration over a large range of frequencies spanning from 100 kHz to 5 MHz. PMID:21891837

  12. Aligned carbon nanotube based ultrasonic microtransducers for durability monitoring in civil engineering

    Energy Technology Data Exchange (ETDEWEB)

    Lebental, B [Universite Paris-Est, IFSTTAR, 58 boulevard Lefebvre, 75732 Paris Cedex 15 (France); Chainais, P [INRIA Lille-Nord Europe (SEQUEL), 40 avenue Halley, 59650 Villeneuve d' Ascq (France); Chenevier, P [SPEC, IRAMIS, CEA/Saclay, Gif-sur-Yvette (France); Chevalier, N; Delevoye, E; Fabbri, J-M; Nicoletti, S; Renaux, P; Ghis, A, E-mail: berengere.lebental@ifsttar.fr [CEA, LETI, MINATEC Campus, F-38054 Grenoble (France)

    2011-09-30

    Structural health monitoring of porous materials such as concrete is becoming a major component in our resource-limited economy, as it conditions durable exploitation of existing facilities. Durability in porous materials depends on nanoscale features which need to be monitored in situ with nanometric resolution. To address this problem, we put forward an approach based on the development of a new nanosensor, namely a capacitive micrometric ultrasonic transducer whose vibrating membrane is made of aligned single-walled carbon nanotubes (SWNT). Such sensors are meant to be embedded in large numbers within a porous material in order to provide information on its durability by monitoring in situ neighboring individual micropores. In the present paper, we report on the feasibility of the key building block of the proposed sensor: we have fabricated well-aligned, ultra-thin, dense SWNT membranes that show above-nanometer amplitudes of vibration over a large range of frequencies spanning from 100 kHz to 5 MHz.

  13. Civil engineering innovations in the Traun river power station project Lambach; Bautechnische Innovationnen beim Traunkraftwerk Lambach

    Energy Technology Data Exchange (ETDEWEB)

    Wicke, M. [Innsbruck Univ. (Austria). Inst. fuer Betonbau; Lindorfer, J. [Oberoesterreichische Kraftwerke AG (Austria); Scheuringer, A. [Planungsgesellschaft m.b.H., Linz (Austria)

    2000-04-01

    Hydroelectric power stations are built for a long term of service and must have a high degree of reliability. The liberalization of the electricity market has increased the economic optimization pressure with a concurrent increase of the quality of the structures. In the construction of Lambach power station these requirements have been met by application of Eurocode Standards in conjunction with the latest findings of concrete technology. Concrete quantities were reduced under consideration of stability requirements. Just outward saving of reinforcing steel was omitted in favour of bearing capacity, serviceability and durability. (orig.) [German] Wasserkraftwerksanlagen werden fuer eine lange Nutzungsdauer gebaut und muessen ein hohes Mass an Zuverlaessigkeit aufweisen. Mit der Liberalisierung des Strommarktes ist der wirtschaftliche Optimierungsdruck bei gleichzeitiger Erhoehung der Bauwerksqualitaet gestiegen. Beim Bau des Kraftwerkes Lambach wurden diese Vorgaben durch Anwendung der Eurocode-Regeln gemeinsam mit den aktuellen Erkenntnissen der Betontechnologie umgesetzt. Betonmassen wurden unter Beruecksichtigung der Standsicherheitserfordernisse eingespart. Auf eine vordergruendige Einsparung von Bewehrungsmassen wurde zugunsten der Tragsicherheit, Gebrauchstauglichkeit und Dauerhaftigkeit verzichtet. (orig.)

  14. Aligned carbon nanotube based ultrasonic microtransducers for durability monitoring in civil engineering.

    Science.gov (United States)

    Lebental, B; Chainais, P; Chenevier, P; Chevalier, N; Delevoye, E; Fabbri, J-M; Nicoletti, S; Renaux, P; Ghis, A

    2011-09-30

    Structural health monitoring of porous materials such as concrete is becoming a major component in our resource-limited economy, as it conditions durable exploitation of existing facilities. Durability in porous materials depends on nanoscale features which need to be monitored in situ with nanometric resolution. To address this problem, we put forward an approach based on the development of a new nanosensor, namely a capacitive micrometric ultrasonic transducer whose vibrating membrane is made of aligned single-walled carbon nanotubes (SWNT). Such sensors are meant to be embedded in large numbers within a porous material in order to provide information on its durability by monitoring in situ neighboring individual micropores. In the present paper, we report on the feasibility of the key building block of the proposed sensor: we have fabricated well-aligned, ultra-thin, dense SWNT membranes that show above-nanometer amplitudes of vibration over a large range of frequencies spanning from 100 kHz to 5 MHz.

  15. 谈土建工程项目现场施工管理%On the On-site Construction Management of Civil Engineering

    Institute of Scientific and Technical Information of China (English)

    郭宜旭

    2014-01-01

    The on-site construction management of civil engineering is an important content of the construction of building engineering. This paper describes several aspects of on-site construction management, and puts forward strategies to improve and strengthen on-site construction management.%土建工程项目的现场施工管理是建筑工程建设的重要内容。文章主要阐述了施工现场管理的几个方面,并在此基础上提出改进和加强施工现场管理的策略。

  16. Environmental testing of wireless sensor system for structural health monitoring of civil infrastructure

    Science.gov (United States)

    Fuchs, Michael P.; Janoyan, Kerop D.; Sazonov, Edward S.; Krishnamurthy, Vidya; Jha, Ratan; Cross, Kevin

    2006-03-01

    Presented in this paper is the environmental testing of Wireless Intelligent Sensor and Actuator Network (WISAN) currently under development at Clarkson University for the use of long-term structural health monitoring of civil infrastructure. The wireless sensor nodes will undergo controlled mechanical vibration and environmental testing in the laboratory. A temperature chamber will be used to perform temperature cycle tests on the sensor nodes. The temperature chamber will also houses a small shaker capable of introducing mechanical loading under the controlled temperature cycle tests. At low temperatures, the resistance of the electronics processing and storage characteristics will be studied. Also, the testing will look at volume expansion and degradation of characteristics due to freezing, degradation of functions and performance, and mechanical characteristics caused by contraction. At high temperatures, temperature-related changes in sensor nodes due to excessively high temperatures will be investigated. Also studied will be the effects of temperature cycles, including the thermal stresses induced in the nodes and housing and the distortion caused due to expansion and contraction, fatigue, cracks, and changes in electrical characteristics due to mechanical displacement. And finally, mechanical vibration loading will be introduced to the WISAN sensor nodes. Mechanical looseness, fatigue destruction, wire disconnection, damage due to harmonic vibration, defective socket contact, joint wear, destruction due to harmonics, lead breakage, occurrence of noise and abnormal vibration, cracking will be monitored. The eventual goal of the tests is to verify WISAN's performance under anticipated field conditions in which the sensors will be deployed.

  17. Brazilian Civil Society Structures and Financial Resources: The case of Rio 1992

    OpenAIRE

    Silvana De Paula

    2006-01-01

    Silvana De Paula looks at the diversity of Brazilian civil society organization financial arrangements around the Global Citizens' Forum held in Rio de Janeiro in 1992. She examines the degree of institutionalization of the different civil society organizations engaged in preparing for the Rio meeting, and how support from international donors impacted on the dynamics of that event. Development (2006) 49, 116–121. doi:10.1057/palgrave.development.1100258

  18. 基于界面管理的土建与电梯工程技术配合%Coordination of civil engineering and elevator engineering technology based on interface management

    Institute of Scientific and Technical Information of China (English)

    范新宇

    2011-01-01

    分析了工程各阶段土建工程与电梯安装的技术界面,提出了暂定厂家,土建条件检查,电梯确认图转换为配合条件设计图等解决方法,以期指导实践,确保各技术界面相容,从而实现电梯安装工程顺利进行。%This paper analyzes the civil engineering phases and technological interface of elevator installation, and proposes solutions, such as temporary determining manufacture, civil engineering check, elevator drawing converting into coordinating design drawing etc, with a view to guide practice, to ensure the cooperation of each interface, and to realize smooth elevator installation engineering.

  19. A comparative study of oral health attitudes and behavior using the Hiroshima University - Dental Behavioral Inventory (HU-DBI) between dental and civil engineering students in Colombia

    Science.gov (United States)

    Jaramillo, Jorge A.; Jaramillo, Fredy; Kador, Itzjak; Masuoka, David; Tong, Liyue; Ahn, Chul; Komabayashi, Takashi

    2014-01-01

    The aim of this study was to use the Hiroshima University - Dental Behavioral Inventory (HU-DBI) to compare oral health attitudes and behavior of dental and civil engineering students in Colombia. The HU-DBI's survey consisting of twenty dichotomous responses (agree-disagree) regarding tooth brushing, was completed at University Antonio Narino for the dental students and the University of Cauca for the civil engineering students. The Spanish version of the HU-DBI questionnaire was taken by 182 of 247 dental students and 411 of 762 engineering students. The data was-statistically analyzed by the chi-square test and backward logistic regression. Compared to the engineering students, the dental students were more likely to agree with questions such as “I am bothered by the color of my gums”(OR = 2.2, 95% CI: 1.3-3.7),“I think I can clean my teeth well without using toothpaste” (OR = 3.0, 95% CI: 1.5-5.9), “I have used a dye to see how clean my teeth are” (OR = 2.9, 95% CI: 1.9-4.3), and “I have had my dentist tell me that I brush very well” (OR = 2.0, 95% CI: 1.3-3.1). The dental education curriculum in a dental school compared to a civil engineering school in Colombia indicated that a three-phase curriculum in didactics and clinics increased oral health attitudes and behavior from entry to graduation. PMID:23485597

  20. 谈220kV全户内变电站土建设计相关问题%Talking about issues relating to civil engineering design of integral 220 kV indoor substation

    Institute of Scientific and Technical Information of China (English)

    张龙骧; 邱新刚

    2012-01-01

    Based on partial civil engineering design of integral 220 kV Xinghua indoor substation, the paper puts forward problems relating to overall general layout, building structure design and professional coordination, and makes an exploration and analysis with a view to optimize overall engineering design scheme and to meet the utilization demands.%通过220 kV杏花全户内变电站土建部分设计,对其总平面布置、建筑结构设计、专业配合等方面提出相关问题,并进行探讨和分析,以优化整个工程的设计方案,满足使用要求。

  1. 30th IMAC, A Conference on Structural Dynamics

    CERN Document Server

    Catbas, FN; Mayes, R; Rixen, D; Griffith, DT; Allemang, R; Clerck, J; Klerk, D; Simmermacher, T; Cogan, S; Chauhan, S; Cunha, A; Racic, V; Reynolds, P; Salyards, K; Adams, D; Kerschen, G; Carrella, A; Voormeeren, SN; Allen, MS; Horta, LG; Barthorpe, R; Niezrecki, C; Blough, JR; Vol.1 Topics on the Dynamics of Civil Structures; Vol.2 Topics in Experimental Dynamics Substructuring and Wind Turbine Dynamics; Vol.3 Topics in Nonlinear Dynamics; Vol.4 Topics in Model Validation and Uncertainty Quantification; Vol.5 Topics in Modal Analysis I; Vol.6 Topics in Modal Analysis II

    2012-01-01

    Topics on the Dynamics of Civil Structures, Volume 1, Proceedings of the 30th IMAC, A Conference and Exposition on Structural Dynamics, 2012, the first volume of six from the Conference, brings together 45 contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on: Human Induced Vibrations Bridge Dynamics Operational Modal Analysis Experimental Techniques and Modeling for Civil Structures System Identification for Civil Structures Method and Technologies for Bridge Monitoring Damage Detection for Civil Structures Structural Modeling Vibration Control Method and Approaches for Civil Structures Modal Testing of Civil Structures.

  2. On Civility and Civilizations

    Institute of Scientific and Technical Information of China (English)

    DAVID GOSSET

    2010-01-01

    @@ At a time when misunderstand-ings between cultures run rampant, when walls of fear, prejudice and hatred divide the members of the human family, it is urgent to intensify the dialogue between civilizations. Under the new leadership of its Director General lrina Bokova, the United Nations Educational, Scientific and Cultural Organization (UNESCO) declared 2010 as the "Year for the Rapprochement of Cultures." In this context, the concerted reflections and actions of Europe and China can be highly meaningful.

  3. Structural Engineering Managers - Innovation Challenges for their Skills

    Science.gov (United States)

    Linkeschová, D.; Tichá, A.

    2015-11-01

    The profession of a structural engineer is highly responsible, because the consequences of a structural engineer's errors result not only in economic damage to the property and often irreversible damage to the environment, they can also lead to direct loss of lives. In the current turbulent, dynamically developing society the managerial methods of structural engineers should not stagnate at the level of the last century applications. This paper deals with the challenges which the ongoing century poses to structural engineers and managers. It compares the results of research regarding the current state of managerial skills of structural engineers in Czech building companies to the defined skills of the 21st century's managers according to the global research programme ITL Research and according to the Vision for the Future of Structural Engineering, drawn up by Structural Engineering Institute - SEI ASCE.

  4. Band structure engineering in organic semiconductors

    Science.gov (United States)

    Schwarze, Martin; Tress, Wolfgang; Beyer, Beatrice; Gao, Feng; Scholz, Reinhard; Poelking, Carl; Ortstein, Katrin; Günther, Alrun A.; Kasemann, Daniel; Andrienko, Denis; Leo, Karl

    2016-06-01

    A key breakthrough in modern electronics was the introduction of band structure engineering, the design of almost arbitrary electronic potential structures by alloying different semiconductors to continuously tune the band gap and band-edge energies. Implementation of this approach in organic semiconductors has been hindered by strong localization of the electronic states in these materials. We show that the influence of so far largely ignored long-range Coulomb interactions provides a workaround. Photoelectron spectroscopy confirms that the ionization energies of crystalline organic semiconductors can be continuously tuned over a wide range by blending them with their halogenated derivatives. Correspondingly, the photovoltaic gap and open-circuit voltage of organic solar cells can be continuously tuned by the blending ratio of these donors.

  5. Band structure engineering in organic semiconductors.

    Science.gov (United States)

    Schwarze, Martin; Tress, Wolfgang; Beyer, Beatrice; Gao, Feng; Scholz, Reinhard; Poelking, Carl; Ortstein, Katrin; Günther, Alrun A; Kasemann, Daniel; Andrienko, Denis; Leo, Karl

    2016-06-17

    A key breakthrough in modern electronics was the introduction of band structure engineering, the design of almost arbitrary electronic potential structures by alloying different semiconductors to continuously tune the band gap and band-edge energies. Implementation of this approach in organic semiconductors has been hindered by strong localization of the electronic states in these materials. We show that the influence of so far largely ignored long-range Coulomb interactions provides a workaround. Photoelectron spectroscopy confirms that the ionization energies of crystalline organic semiconductors can be continuously tuned over a wide range by blending them with their halogenated derivatives. Correspondingly, the photovoltaic gap and open-circuit voltage of organic solar cells can be continuously tuned by the blending ratio of these donors. PMID:27313043

  6. Structural Dynamics, Vol. 9

    DEFF Research Database (Denmark)

    Nielsen, Søren R.K.

    This book has been prepared for the course on Computational Dynamics given at the 8th semester at the structural program in civil engineering at Aalborg University.......This book has been prepared for the course on Computational Dynamics given at the 8th semester at the structural program in civil engineering at Aalborg University....

  7. Atlas civil engineering

    CERN Multimedia

    2002-01-01

    The first things lowered to the cavern were not parts of the new detector or parts for the accelerator rather than the machines digging the cavern bigger and lifts that transport stones and other excess material up to the surface. This work was very demanding already.

  8. Evaluation of environmental management resources (ISO 14001) at civil engineering construction worksites: a case study of the community of Madrid.

    Science.gov (United States)

    Rodríguez, Gracia; Alegre, Francisco Javier; Martínez, Germán

    2011-07-01

    In recent years, significant advances have been made in business organization and management. The growing demands of clients as well as the globalization of world markets are among the many factors that have led to the establishment of systems of quality control and environmental management as a competitive strategy for businesses. When compared to other professional sectors, the construction sector has been slower to respond to environmental problems and to adopt Environmental Management Systems (EMS). In the world today the ISO 14001 standard is currently the main frame of reference used by construction companies to implement this type of management system. This article presents the results of a general study regarding the evaluation of the application of the ISO 14001 standard at civil engineering construction worksites in the Community of Madrid (Spain), specifically pertaining to requirement 4.4.1, Resources, roles, responsibilities, and authority. According to requirement 4.4.1, company executives should appoint people responsible for implementing the EMS and also specify their responsibilities and functions. The personnel designated for supervising environmental work should also have sufficient authority to establish and maintain the EMS. The results obtained were the following: - EMS supervisors did not generally possess adequate training and solid experience in construction work and in the environment. Furthermore, supervisors were usually forced to combine their environmental work with other tasks, which made their job even more difficult. - Generally speaking, supervisors were not given sufficient authority and autonomy because productivity at the construction site had priority over environmental management. This was due to the fact that the company management did not have a respectful attitude toward the environment, nor was the management actively involved in the establishment of the EMS. - Insufficient resources were allocated to the Environmental

  9. Evaluation of environmental management resources (ISO 14001) at civil engineering construction worksites: a case study of the community of Madrid.

    Science.gov (United States)

    Rodríguez, Gracia; Alegre, Francisco Javier; Martínez, Germán

    2011-07-01

    In recent years, significant advances have been made in business organization and management. The growing demands of clients as well as the globalization of world markets are among the many factors that have led to the establishment of systems of quality control and environmental management as a competitive strategy for businesses. When compared to other professional sectors, the construction sector has been slower to respond to environmental problems and to adopt Environmental Management Systems (EMS). In the world today the ISO 14001 standard is currently the main frame of reference used by construction companies to implement this type of management system. This article presents the results of a general study regarding the evaluation of the application of the ISO 14001 standard at civil engineering construction worksites in the Community of Madrid (Spain), specifically pertaining to requirement 4.4.1, Resources, roles, responsibilities, and authority. According to requirement 4.4.1, company executives should appoint people responsible for implementing the EMS and also specify their responsibilities and functions. The personnel designated for supervising environmental work should also have sufficient authority to establish and maintain the EMS. The results obtained were the following: - EMS supervisors did not generally possess adequate training and solid experience in construction work and in the environment. Furthermore, supervisors were usually forced to combine their environmental work with other tasks, which made their job even more difficult. - Generally speaking, supervisors were not given sufficient authority and autonomy because productivity at the construction site had priority over environmental management. This was due to the fact that the company management did not have a respectful attitude toward the environment, nor was the management actively involved in the establishment of the EMS. - Insufficient resources were allocated to the Environmental

  10. Problem-Based Project-Oriented Learning: Educating and evaluating for new disciplines emerging in the interplay between the professions of civil engineering and architecture

    DEFF Research Database (Denmark)

    Mullins, Michael

    2006-01-01

    advantages in a search for solutions of which integrate these approaches. The Department of Architecture and Design (A&D) at Aalborg University has been intiated with the explicit aim to educate for new disciplines emerging in the interplay between the professions of civil engineering and architecture......University curricula are traditionally based on specialised discipline-specific subjects, which like engineering and architecture approach solutions to design problems with methods suited to their specific view of the issues. Problem-based learning models (PBL) offer a number of potential......, and uses PBL and project-oriented models for its educational form. There is a distinct difference between engineering and architecture in their evolutionary backgrounds and their varying degree of emphasis on natural science. Both present different forms of problem solving that appeal to different learning...

  11. Protective system for civil buildings and industrial structures subjected to the seismic risk

    Science.gov (United States)

    Ghica, D.; Grigore, A.; Ionescu, C.

    2009-04-01

    Romania is a European country with significant seismicity. The most active seismic zone is represented by the Vrancea area, located within the arch of the Carpathians Mountains. Vrancea seismicity is characterized by intermediate depth earthquakes which occur in a narrow epicentral and hypocentral region. During the last 70 years, Romania experienced four strong Vrancea earthquakes: 10 November 1940 (Mw =7.7, 160 km depth), 4 March 1977 (Mw =7.5, 100 km depth), 30 August 1986 (Mw =7.2, 140 km depth), 30 May 30 1990 (Mw =6.9, 80 km depth). The 1977 event was characterized by catastrophic consequences: 1500 casualties and collapsing of 35 high-risk buildings, mostly occurring in Bucharest. The purpose of this paper is to present a protective system designed to be installed in the civil buildings and industrial structures placed in the high seismic regions, and therefore to contribute to the mitigation of the strong earthquake effects on human society. This system proposes an efficient antiseismic protection, respectively shutting down the installations and equipments mounted in the building's infrastructure, which can become extremely dangerous in case of a major earthquake by appearing the possibility of explosions, deflagration, fires, toxic and polluting fluids leakage. The damages are strongly amplified by the fact that, simultaneously, water and electric energy lines distributions are damaged too, making impossible an efficient firemen intervention, for localizing the fire sources. Moreover, the installations of the individual heating stations which operate with open flame increase the risk of explosions inside the buildings during an earthquake. The protective system consists of a seismic switch used for activating through weak-electric-currents of the building's safety systems in case of strong earthquake, especially designed for building's elevators, as well as for moving parts of installations, which require positioning in safety place areas. The originality

  12. Finite Element Vibration and Dynamic Response Analysis of Engineering Structures

    Directory of Open Access Journals (Sweden)

    Jaroslav Mackerle

    2000-01-01

    Full Text Available This bibliography lists references to papers, conference proceedings, and theses/dissertations dealing with finite element vibration and dynamic response analysis of engineering structures that were published from 1994 to 1998. It contains 539 citations. The following types of structures are included: basic structural systems; ground structures; ocean and coastal structures; mobile structures; and containment structures.

  13. Fly Ash in Civil Engineering Stage 1: Inventory/Application; Flygaska i geotekniska anlaeggningar Etapp 1: Inventering/Tillaemplighet

    Energy Technology Data Exchange (ETDEWEB)

    Macsik, Josef; Svedberg, Bo; Lenstroemer, Stina; Nilsson, Thomas [Scandiaconsult, Stockholm (Sweden)

    2004-01-01

    The project presented below is the first phase of a broader project named FACE 'Fly Ash in Civil Engineering'. The objective of the project is to identify environmentally friendly products based on fly ash to be used in geotechnical applications such as road bases etc. In this phase of the project, named 'Inventory/Applicability', different fly ashes have been grouped according to their technical properties and potential applications. The objective of grouping fly ashes is to identify key-properties in order to make future investigations less extensive and also to make it easier to assess potential applications in the future. A total of nine different fly ashes from incineration of bio fuels (Heating Plants and Forest Industry Boilers) were investigated. The investigated fly ashes were all fresh and dry apart from two which originated from landfill. Properties such as grain-size distribution, water content, void-ratio, loss on ignition, compaction properties, increase of shear strength, have been investigated. Analyses of the results indicate that fly ashes can be divided into three main groups A, B and C, where: Group A fly ashes have poor curing properties and need stabilisation agents such as other fly ashes with higher curing capacity or cement (Portland cement, Merit 5000 etc.). Fly ash which has been stored in landfill and has a low content of quick lime is also part of this group. These fly ashes are not appropriate for use without addition of stabilising agent if they are to be used in applications where percolating water and frost-thaw cycles occur. After stabilisation with fresh fly ash and cement, fly ashes from this group can be used in sub-base in roads. Group B fly ashes have medium-high to high content of quick lime and good development of shear strength. These fly ashes can be used without being stabilised with cement. In fact, adding cement can reduce properties of compaction thus reducing the strength of a construction. The

  14. Web application to access U.S. Army Corps of Engineers Civil Works and Restoration Projects information for the Rio Grande Basin, southern Colorado, New Mexico, and Texas

    Science.gov (United States)

    Archuleta, Christy-Ann M.; Eames, Deanna R.

    2009-01-01

    The Rio Grande Civil Works and Restoration Projects Web Application, developed by the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers (USACE) Albuquerque District, is designed to provide publicly available information through the Internet about civil works and restoration projects in the Rio Grande Basin. Since 1942, USACE Albuquerque District responsibilities have included building facilities for the U.S. Army and U.S. Air Force, providing flood protection, supplying water for power and public recreation, participating in fire remediation, protecting and restoring wetlands and other natural resources, and supporting other government agencies with engineering, contracting, and project management services. In the process of conducting this vast array of engineering work, the need arose for easily tracking the locations of and providing information about projects to stakeholders and the public. This fact sheet introduces a Web application developed to enable users to visualize locations and search for information about USACE (and some other Federal, State, and local) projects in the Rio Grande Basin in southern Colorado, New Mexico, and Texas.

  15. Web Application to Access U.S. Army Corps of Engineers Civil Works and Restoration Projects Information for the Rio Grande Basin, Southern Colorado, New Mexico, and Texas

    Science.gov (United States)

    Archuleta, Christy-Ann M.; Eames, Deanna R.

    2009-01-01

    The Rio Grande Civil Works and Restoration Projects Web Application, developed by the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers (USACE) Albuquerque District, is designed to provide publicly available information through the Internet about civil works and restoration projects in the Rio Grande Basin. Since 1942, USACE Albuquerque District responsibilities have included building facilities for the U.S. Army and U.S. Air Force, providing flood protection, supplying water for power and public recreation, participating in fire remediation, protecting and restoring wetlands and other natural resources, and supporting other government agencies with engineering, contracting, and project management services. In the process of conducting this vast array of engineering work, the need arose for easily tracking the locations of and providing information about projects to stakeholders and the public. This fact sheet introduces a Web application developed to enable users to visualize locations and search for information about USACE (and some other Federal, State, and local) projects in the Rio Grande Basin in southern Colorado, New Mexico, and Texas.

  16. 土木工程大类复合型人才培养模式探讨%Compound talent training mode for civil engineering specialty

    Institute of Scientific and Technical Information of China (English)

    刘荣桂; 蔡东升

    2012-01-01

    Mode of compound talents training for civil engineering specialty is a systematic project;this paper discussed how to cultivate compound talents for civil engineering specialty from training aim,teaching plan,curriculum system,teaching content,practice teaching and teacher's team construction.Under the framework of professional guidance committee of the Ministry of Education,proposed that specialized talents needs must be combined with the social development;professional content of civil engineering majors must be reformed;cultivating aim must be cleared;corresponding reforms in teaching plan,curriculum system,teaching content,teaching book construction,sources of teacher etc must be carried out in order to foster multi-skilled compound talents.%土木工程大类复合型人才培养模式是一个系统工程,文章在专业培养目标、教学计划、课程体系、课程内容、实践教学及师资队伍建设等方面对如何培养土木工程大类复合型人才进行了一定的探讨,提出土木工程大类复合型人才培养模式应在教育部专业指导委员会的总框架下,结合社会发展对专业人才的需求,改革专业的内涵,明确土木工程大类复合型人才培养目标,在教学计划、课程体系、课程内容、教材建设、师资来源等方面进行相应的改革,以培养出一专多能的土木工程大类复合型人才。

  17. In the Ruins of Civilizations: Narrative Structures, World Constructions, and Physical Realities in the Post-Apocalyptic Novel [Reseña de libro

    OpenAIRE

    Weidner, Chad

    2014-01-01

    Reseña de libro: Sibylle Machat, In the Ruins of Civilizations: Narrative Structures, World Constructions, and Physical Realities in the Post-Apocalyptic Novel (Trier: Wissenschaftlicher Verlag Trier, 2013), 330pp.

  18. Fibrous materials reinforced composites for structural health monitoring

    OpenAIRE

    Güemes Gordo, Alfredo; Casas Rius, Joan Ramon

    2011-01-01

    Structural Health Monitoring is becoming more and more used in civil engineering infrastructure. The technology for implementing SHM applications is presented in this Chapter. Details on instrumented civil constructions are then discussed, together with most innovative future trends.

  19. 土木工程管理施工过程质量控制措施探究%Study on the Construction Process Quality Control Measures of Civil Engineering Management

    Institute of Scientific and Technical Information of China (English)

    李志刚

    2013-01-01

    This paper discusses the quality control measures of civil engineering management in construction process from the fol owing two aspects:one is the existing problems of the civil engineering management quality control in construction process; the other is the measures for construction process quality control of civil engineering management. According to the construction quality control problem in civil engineering, adopt appropriate control strategy, to improve the civil engine-ering level of construction quality control.%本文从以下两个方面探讨土木工程管理施工过程质量控制措施:一是土木工程管理施工过程质量控制中存在的问题;二是土木工程管理施工过程质量控制的措施。根据土木工程施工质量控制中存在的问题,采取有针对性的控制策略,提高土木工程施工质量控制的水平。

  20. 土建类大学毕业生价值观调查研究%Investigation on Values of College Graduate Students Majoring in Civil Engineering

    Institute of Scientific and Technical Information of China (English)

    王惠玉; 王力琼; 赵磊

    2011-01-01

    The values of 436 college students of 3 majors in civil engineering graduated in 2011 were investigated by using the questionnaire method, where the questions were mainly selected from the 'World Values Survey,China 2007,[8]designed by Research Center for Contemporary China of Peking University. The research data were then analyzed by statistics and non-metric dimensional scaling method. The results showed that these students had positively patriotism and national pride, and were very interested in society, politics, science progresses and life meanings with the similar understandings or opinions. Happy family was the primary life goal only followed by career success for the most students. The relationships among 10 basic values defined by Schwartz were much different for students with different majors, genders, residences before college life,consumptions,provinces,one-child or multi-child families, which indicated those factors have some impact on the values of the students. For the whole sample, 10 basic values of civil engineering students newly graduated from university had the characteristics of clustering. Hedonism and power were negatively related to the other values,and the distribution of achievement value was much different from the structural relationship proposed by Schwartz and testified by many other overseas researches, which might be attributed to the deferent understandings of achievement between the Eastern culture and Western culture. The methods and results could be referred to the research and education for college students.%选择北京大学国情研究中心编制的《2007年全国公民价值观状况调查问卷》[8]中的部分问题,采用问卷调查的方法,对436名2011届土建类部分专业的大学毕业生进行价值观调查.对调研数据采用数理统计和多尺度降维方法进行相关性分析.结果表明:土建类毕业生大多具有较高的爱国热情和民族自豪感,对社会、政治、科技进步和人

  1. Hard magnetism in structurally engineered silica nanocomposite.

    Science.gov (United States)

    Song, Hyon-Min; Zink, Jeffrey I

    2016-09-21

    Creation of structural complexity by simple experimental control will be an attractive approach for the preparation of nanomaterials, as a classical bottom-up method is supplemented by a more efficient and more direct artificial engineering method. In this study, structural manipulation of MCM-41 type mesoporous silica is investigated by generating and imbedding hard magnetic CoFe2O4 nanoparticles into mesoporous silica. Depending on the heating rate and target temperature, mesoporous silica undergoes a transformation in shape to form hollow silica, framed silica with interior voids, or melted silica with intact mesostructures. Magnetism is governed by the major CoFe2O4 phase, and it is affected by antiferromagnetic hematite (α-Fe2O3) and olivine-type cobalt silicate (Co2SiO4), as seen in its paramagnetic behavior at the annealing temperature of 430 °C. The early formation of Co2SiO4 than what is usually observed implies the effect of the partial substitution of Fe in the sites of Co. Under slow heating (2.5 °C min(-1)) mesostructures are preserved, but with significantly smaller mesopores (d100 = 1.5 nm). In addition, nonstoichiometric CoxFe1-xO with metal vacancies at 600 °C, and spinel Co3O4 at 700 °C accompany major CoFe2O4. The amorphous nature of silica matrix is thought to contribute significantly to these structurally diverse and rich phases, enabled by off-stoichiometry between Si and O, and accelerated by the diffusion of metal cations into SiO4 polyhedra at an elevated temperature.

  2. Fatigue reliability of cracked engineering structures

    Science.gov (United States)

    Lanning, David Bruce, Jr.

    1997-12-01

    This study investigates the reliability of engineering structures containing fatigue cracks. Stress concentrations and welded joints are probable locations for the initiation and propagation of fatigue cracks. Due to the many unknowns of loading, materials properties, crack sizes and crack shapes present at these locations, a statistics-based reliability analysis is valuable in the careful consideration of these many different random factors involved in a fatigue life analysis, several of which are expanded upon in this study. The basic problem of a crack near a stress concentration is first considered. A formulation for the aspect ratio (a/c) of a propagating semi-elliptical fatigue crack located at the toe of a welded T-joint is developed using Newman and Raju's stress intensity factor for a cracked flat plate with a weld magnification factor and compared to that of a cracked flat plate, and the reliability in terms of fatigue lifetime is calculated with the aid of Paris' crack propagation equation for membrane and bending loadings. Crack closure effects are then introduced in the consideration of short crack effects, where crack growth rates typically may exceed those found using traditional linear elastic fracture mechanics solutions for long cracks. The probability of a very small, microstructurally influenced crack growing to a size influenced by local plastic conditions is calculated utilizing the probability of a crack continuing to grow past an obstacle, such as a grain boundary. The result is then combined with the probability for failure defined using the crack closure-modified Paris equation to find an overall reliability for the structure. Last, the probability of fracture is determined when a crack front encounters regions of non-uniform toughness, such as typical in the heat affected zone of a welded joint. An expression for the effective crack lengths of the dissimilar regions is derived, and used in a weakest-link fracture model in the evaluation

  3. Study on protective facility information price management of civil air defense engineering%人防工程防护设备信息价格管理研究

    Institute of Scientific and Technical Information of China (English)

    张桂萍

    2015-01-01

    论述了人防工程防护设备价格信息管理存在的主要问题,对产生各种问题的原因进行了分析,提出了进一步开放市场、建立全国性的人防工程防护设备信息价网络系统、加强质量监督等对策,以维护防护设备市场的稳定性。%The paper discusses protective facility information price management problems of civil air defense engineering,analyzes various cau-ses,puts forward a series of countermeasures,such as opening market,establishing national civil air defense engineering protecting facility infor-mation price network system,and strengthening quality supervision and so on,with a view to maintain the stability of protective facility market.

  4. The influences of scientific information on the growing in opinion for high level waste repository. Focusing on education in civil engineering course

    International Nuclear Information System (INIS)

    In this research, survey of awareness and attitude to high level radioactive waste (HLW) disposal on 36 students of a postgraduate course was conducted. They have been studying civil and rock engineering, so they belong to 'the Group' that acquires high education, culture and faculty to understand the science in geological disposal of HLW. First of all the awareness of danger or safety to HLW disposal was examined. Some 23% regard HLW disposal as safe, on the contrary 60% feel danger. This is similar to the awareness of the average public. And some 72% think that HLW should be disposal, but only 6% agree the repository in their town. It shows that the Group of high education has a tendency of calmly understand the necessity of disposal, but they also have a nature so-called 'not in my back yard (NIMBY)'. After that, the students were divided in two groups. Then, one group received information from the promoter, and another received information from opponents. The result of second questionnaire shows that the awareness of danger is affected strongly by given information even in this Group, but they become thoughtful and prudent in their opinion and decision-making as increasing information. Finally in this paper it is studied that 'what is the role of education of civil engineering?' and 'what is key issue in R and D of HLW disposal?' considering Public Acceptance. (author)

  5. Education and training requirements for a practicing civil engineer to qualify for registration in Australasia and the United Kingdom

    OpenAIRE

    Yeung, ATC

    2013-01-01

    The making a qualified and competent engineer requires education, practical training, and a professional assessment. Obtaining a professional registration is an indication of competence and willingness to shoulder the legal and social responsibilities required to be an engineer. It also gives the general public the sense of confidence for engineering works designed and constructed by engineers. The requirements and procedure of registration can be stipulated in law, and/or controlled by profe...

  6. Realização de processos verbais em textos científicos da área de engenharia civil Realization of verbal processes in scientific texts in the field of civil engineering

    Directory of Open Access Journals (Sweden)

    Cristiane Fuzer

    2012-01-01

    Full Text Available O presente trabalho, vinculado ao projeto SAL, apresenta um estudo da realização de processos verbais em língua portuguesa do Brasil em textos da área de Engenharia Civil. O objetivo é analisar quais formas linguísticas realizam processos verbais, com que frequência são usados e que significados produzem em textos científicos dessa área. O corpus de análise constitui-se de 51 textos que compõem os volumes 1 e 2 do livro "Concreto: ciência e tecnologia", publicada pelo IBRACON (Instituto Brasileiro do Concreto. Para a compilação do corpus, seguiram-se princípios da Linguística de Corpus (Sardinha, 2004; Almeida & Correia, 2008. A identificação das formas linguísticas e o tratamento quantitativo dos dados foram realizados com auxílio das ferramentas WordListe Concord do WordSmith Tools (SCOTT, 2008. A análise das formas linguísticas foi realizada com base nos critérios da Gramática Sistêmico-Funcional (Halliday & Matthiessen, 2004 para descrição e classificação de processos verbais. Os resultados apontam que os verbos mais frequentes do corpus, recomendar e especificar, funcionam como processos de semiose do tipo comando e podem ser consideradas características do discurso científico na área de Engenharia Civil.Formas linguísticas em terceira pessoa do presente e no particípio servem como recurso de impessoalização no discurso científico.This paper, linked to the SAL project, presents a study on the realization of verbal processes in Brazilian Portuguese in Civil Engineering texts. Its aim is to analyse the linguistic forms that realize verbal processes, how often they are used and what meanings they produce in texts in that field. The corpus consists of the 51 texts in the 2 volumes of the book Concreto: ciência e tecnologia, published by IBRACON (InstitutoBrasileiro do Concreto. To compile the corpus we followed the principles of Corpus Linguistics (Sardinha, 2004; Almeida & Correia, 2008. The

  7. Using the technology of ship reactors with a liquid-metal coolant in the civil nuclear power engineering of Russia

    International Nuclear Information System (INIS)

    One analyzes possibility to apply ship reactors with Pb-Bi coolant in civil nuclear power plants of Russia. Renovation of NPP units with Pb-Bi coolant reactor modulus is shown to be one of the most economically efficient ways to replace decommissioned capacities. The elaborated renovation of the Novo-Voronezh NPP old power units demonstrates that this option rules out most severe accidents

  8. Expert systems for quality prediction in structural engineering

    OpenAIRE

    Cerrolaza Rivas, Miguel; Gómez Sedano, Benedicto; Alarcón Álvarez, Enrique

    1988-01-01

    This work deals with quality level prediction in concrete structures through the helpful assistance of an expert system wich is able to apply reasoning to this field of structural engineering. Evidences, hypotheses and factors related to this human knowledge field have been codified into a Knowledge Base in terms of probabilities for the presence of either hypotheses or evidences,and conditional presence of both. Human experts in structural engineering and safety of structures gave their inva...

  9. 78 FR 5760 - Civil Monetary Penalty Inflation Adjustment

    Science.gov (United States)

    2013-01-28

    ... Department of the Army, Corps of Engineers 33 CFR Part 326 RIN 0710-AA66 Civil Monetary Penalty Inflation... Engineers (Corps) is proposing to amend its regulations to adjust its Class I civil penalties under the... civil penalties to account for inflation is required by the Federal Civil Penalties Inflation...

  10. Environmental guidelines for reuse of ash in civil engineering applications - phase 2; Miljoeriktlinjer foer askanvaendning i anlaeggningsbyggande - etapp 2

    Energy Technology Data Exchange (ETDEWEB)

    Bendz, David; Wik, Ola; Elert, Mark; Haakansson, Karsten

    2006-07-15

    Producers, authorities and users have acknowledged the need for common environmental guidelines for residues. The objective of this project has been to develop a proposal for common environmental guidelines for reuse of ash in civil engineering applications. The project has a narrow risk assessment perspective and focus on a set of substances where a well developed environmental policy and knowledge are available. Health aspects for construction workers are not covered in the project. The starting point in the risk assessment is the assumption that ashes may be used just like any conventional construction material. Special requirements or regulations regarding precautionary actions in the handling of ashes, regarding the site or surroundings will be avoided. The guiding principle has been the precautionary principle: reuse of ash is acceptable only if it constitute an insignificant risk to health and environment. The calculations are based on defined emission- and exposure scenarios. The concept of insignificant risk imply that the impact in the defined points of compliance does not exceed established health- and environmental criteria. The model address health risks associated with spreading of particles and exposure by dust, oral intake, dermal contact and intake by vegetables or wild grown berries and consumption of ground water. Off-site environmental effects in surface waters and in soil as well as health- and environmental risks in the post use phase are also considered. Exposure by dust is addressed in the same way as in the Swedish Environmental Protection Agency's guidelines for contaminated soil. The guidelines values for exposure by dust, oral intake, dermal contact and intake by vegetables or wild grown berries are total content, whereas the guidelines for exposure by consumption of ground water or environmental effects in surface waters are based on leaching properties of the ash. The guidelines rely on a conceptual model, defined emissions and

  11. Civil Drafting.

    Science.gov (United States)

    Schertz, Karen; Kellum, Mary, Ed.

    This curriculum guide contains a course in civil drafting to train entry-level workers for jobs in the field. The module contains 12 instructional units that cover the following topics: (1) introduction to civil drafting; (2) map scales and measurement; (3) standard symbols and abbreviations; (4) interpretation of surveyor's notations; (5) legal…

  12. Petrophysical properties and durability of the Touro amphibolite s (A Coruna, Spain) used in civil engineering; Petrofisica y durabilidad de las anfibolitas de Touro (A Coruna, Espana) para su uso en obra civil

    Energy Technology Data Exchange (ETDEWEB)

    Perez Foretes, A. P.; Varas Muriel, M. J.; Cano Linares, H.; Castineiras Garcia, P.; Pardo Santayana, F.

    2013-09-01

    Nowadays, Touro amphibolites (La Coruna, Spain) are exploited as crushed-rock aggregates in civil engineering. These materials are mainly used as ballast for road construction. Therefore, it is interesting to study these materials in function of several parameters obtained directly in quarry faces. For this purpose, the same techniques and tests previously applied in other fields such as natural stone have been used. The aim of this work is to study the quality and durability of Touro amphibolites when subjected to extreme temperature, water and salt (NaCl) actions. The NaCl is included in this study because it is commonly used as fluxing material in pavements and roads. The quality of these amphibolites, a classification based on the concrete and road tests and the techniques applied, is good. The best properties of these materials are their low porosity and high ability to compact. They also have a high durability under the action of extreme temperatures, salts and water. These results also indicate that these amphibolites can better support high temperature rather than low temperature degradation. (Author)

  13. Visualization and Analysis of Wireless Sensor Network Data for Smart Civil Structure Applications Based On Spatial Correlation Technique

    Science.gov (United States)

    Chowdhry, Bhawani Shankar; White, Neil M.; Jeswani, Jai Kumar; Dayo, Khalil; Rathi, Manorma

    2009-07-01

    Disasters affecting infrastructure, such as the 2001 earthquakes in India, 2005 in Pakistan, 2008 in China and the 2004 tsunami in Asia, provide a common need for intelligent buildings and smart civil structures. Now, imagine massive reductions in time to get the infrastructure working again, realtime information on damage to buildings, massive reductions in cost and time to certify that structures are undamaged and can still be operated, reductions in the number of structures to be rebuilt (if they are known not to be damaged). Achieving these ideas would lead to huge, quantifiable, long-term savings to government and industry. Wireless sensor networks (WSNs) can be deployed in buildings to make any civil structure both smart and intelligent. WSNs have recently gained much attention in both public and research communities because they are expected to bring a new paradigm to the interaction between humans, environment, and machines. This paper presents the deployment of WSN nodes in the Top Quality Centralized Instrumentation Centre (TQCIC). We created an ad hoc networking application to collect real-time data sensed from the nodes that were randomly distributed throughout the building. If the sensors are relocated, then the application automatically reconfigures itself in the light of the new routing topology. WSNs are event-based systems that rely on the collective effort of several micro-sensor nodes, which are continuously observing a physical phenomenon. WSN applications require spatially dense sensor deployment in order to achieve satisfactory coverage. The degree of spatial correlation increases with the decreasing inter-node separation. Energy consumption is reduced dramatically by having only those sensor nodes with unique readings transmit their data. We report on an algorithm based on a spatial correlation technique that assures high QoS (in terms of SNR) of the network as well as proper utilization of energy, by suppressing redundant data transmission

  14. Application of CAD Marking and Query in Civil Engineering%CAD的标注和查询功能在土木工程中的应用

    Institute of Scientific and Technical Information of China (English)

    王继成; 林清辉; 柳爱

    2012-01-01

    It is difficult to calculate in construction measurement. Mistakes are often made in manual calculations and it's not intuitive to manual calculation. In this article, construction measurement with CAD marking and querying is presented and it is applied to automatically implement construction measurement in civil engineering. CAD marking and querying has high accuracy as well as implementation easily, quickly and directly.%针对施工放线内业计算繁琐、手工计算易出差错且不直观等问题,介绍了利用CAD程序的标注工具和查询功能,并将其应用于土木工程自动完成施工放线的内业计算,标注、查询的参数精度高、简单、直观、快捷.

  15. 关于电气节能在民用建筑工程中的运用%Application of electrical energy saving in civil building engineering

    Institute of Scientific and Technical Information of China (English)

    樊管民

    2014-01-01

    在分析当前中国电气节能技术状况的基础上,对照明节能、供配电系统节能等进行了论述,提出了减少变压器与线路损耗措施,最后对民用建筑工程中电气节能技术的发展空间进行了展望。%On the basis of analyzes current domestic electrical energy saving technology status,the paper discusses the lighting energy saving and power supply and distribution system energy saving and so on,puts forward measures of reducing transformer and line consumption measures,and finally points out the prospect of the development space of electrical energy saving technology in civil building engineering.

  16. Modeling In-Use Steel Stock in China’s Buildings and Civil Engineering Infrastructure Using Time-Series of DMSP/OLS Nighttime Lights

    Directory of Open Access Journals (Sweden)

    Hanwei Liang

    2014-05-01

    Full Text Available China’s rapid urbanization has led to increasing steel consumption for buildings and civil engineering infrastructure. The in-use steel stock in the same is considered to be closely related to social welfare and urban metabolism. Traditional approaches for determining the in-use steel stock are labor-intensive and time-consuming processes and always hindered by the availability of statistical data. To address this issue, this study proposed the use of long-term nighttime lights as a proxy to effectively estimate in-use steel stock for buildings (IUSSB and civil engineering infrastructure (IUSSCE at the provincial level in China. Significant relationships between nighttime lights versus IUSSB and IUSSCE were observed for provincial variables in a single year, as well as for time series variables of a single province. However, these relationships were found to differ among provinces (referred to as “inter-individual differences” and with time (referred to as “temporal differences”. Panel regression models were therefore proposed to estimate IUSSB and IUSSCE in consideration of the temporal and inter-individual differences based on a dataset covering 1992–2007. These models were validated using data for 2008, and the results showed good estimation for both IUSSB and IUSSCE. The proposed approach can be used to easily monitor the dynamic of IUSSB and IUSSCE in China. This should be critical in providing valuable information for policy making regarding regional development of buildings and infrastructure, sustainable urban resource management, and cross-boundary material recycling.

  17. Laser Scanning in Engineering Surveying: Methods of Measurement and Modeling of Structures

    Science.gov (United States)

    Lenda, Grzegorz; Uznański, Andrzej; Strach, Michał; Lewińska, Paulina

    2016-06-01

    The study is devoted to the uses of laser scanning in the field of engineering surveying. It is currently one of the main trends of research which is developed at the Department of Engineering Surveying and Civil Engineering at the Faculty of Mining Surveying and Environmental Engineering of AGH University of Science and Technology in Krakow. They mainly relate to the issues associated with tower and shell structures, infrastructure of rail routes, or development of digital elevation models for a wide range of applications. These issues often require the use of a variety of scanning techniques (stationary, mobile), but the differences also regard the planning of measurement stations and methods of merging point clouds. Significant differences appear during the analysis of point clouds, especially when modeling objects. Analysis of the selected parameters is already possible basing on ad hoc measurements carried out on a point cloud. However, only the construction of three-dimensional models provides complete information about the shape of structures, allows to perform the analysis in any place and reduces the amount of the stored data. Some structures can be modeled in the form of simple axes, sections, or solids, for others it becomes necessary to create sophisticated models of surfaces, depicting local deformations. The examples selected for the study allow to assess the scope of measurement and office work for a variety of uses related to the issue set forth in the title of this study. Additionally, the latest, forward-looking technology was presented - laser scanning performed from Unmanned Aerial Vehicles (drones). Currently, it is basically in the prototype phase, but it might be expected to make a significant progress in numerous applications in the field of engineering surveying.

  18. Laser Scanning in Engineering Surveying: Methods of Measurement and Modeling of Structures

    Directory of Open Access Journals (Sweden)

    Lenda Grzegorz

    2016-06-01

    Full Text Available The study is devoted to the uses of laser scanning in the field of engineering surveying. It is currently one of the main trends of research which is developed at the Department of Engineering Surveying and Civil Engineering at the Faculty of Mining Surveying and Environmental Engineering of AGH University of Science and Technology in Krakow. They mainly relate to the issues associated with tower and shell structures, infrastructure of rail routes, or development of digital elevation models for a wide range of applications. These issues often require the use of a variety of scanning techniques (stationary, mobile, but the differences also regard the planning of measurement stations and methods of merging point clouds. Significant differences appear during the analysis of point clouds, especially when modeling objects. Analysis of the selected parameters is already possible basing on ad hoc measurements carried out on a point cloud. However, only the construction of three-dimensional models provides complete information about the shape of structures, allows to perform the analysis in any place and reduces the amount of the stored data. Some structures can be modeled in the form of simple axes, sections, or solids, for others it becomes necessary to create sophisticated models of surfaces, depicting local deformations. The examples selected for the study allow to assess the scope of measurement and office work for a variety of uses related to the issue set forth in the title of this study. Additionally, the latest, forward-looking technology was presented - laser scanning performed from Unmanned Aerial Vehicles (drones. Currently, it is basically in the prototype phase, but it might be expected to make a significant progress in numerous applications in the field of engineering surveying.

  19. Civil Identity

    DEFF Research Database (Denmark)

    Petersen, Lars Axel

    In this paper I will go through a catalogue of examples of contexts in which the term civil identity is currently used, ranging from the formal and technical process of linking a set of administrative and other events to an individual biological person by means of identity cards, fingerprints, iris...... of Israel to Luce Irigaray's Feminist agenda of elaborating gender specific civil identities. My intention is to investigate whether these different employments of 'civil identity' point towards a common, and fairly well defined object field asking questions of contemporary relevance to the philosophy...

  20. Information and telecommunication system for monitoring of hydraulic engineering structures

    Science.gov (United States)

    Pavlycheva, Nadezhda K.; Akhmetgaleeva, Railia R.; Muslimov, Eduard R.; Murav'eva, Elena V.; Peplov, Artem A.; Sibgatulina, Dina S.

    2016-03-01

    In this article, we present the information and telecommunications system that allows to carry out real-time monitoring of the quality and quantity of hydraulic engineering structures in order to reduce the risk of emergencies caused by environmental damage.

  1. Reliability-based optimization of engineering structures

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard

    2008-01-01

    The theoretical basis for reliability-based structural optimization within the framework of Bayesian statistical decision theory is briefly described. Reliability-based cost benefit problems are formulated and exemplitied with structural optimization. The basic reliability-based optimization prob...

  2. Structural Model for Jet Engine Configuration Using Knowledge-Based Engineering

    OpenAIRE

    Tenllado Cunillera, Albert

    2009-01-01

    The overall goal is to develop a structural model that enables configuration of different jet engine concepts and used as input to the research project where dynamic and stress analysis will be performed. The specific goal is to: use the KBE-module of Siemens PLM NX5 called Knowledge Fusion to implement a simplified turbofan jet engine containing accordin to Figure 1. Although the focus is on the structural (i.e the parts that create the stiffness of the jet engine and mostly are static) part...

  3. On application of pre-settlement of civil engineering projects on cost indexes and relevant data%土建工程预结算关于造价指标及关联数据的应用

    Institute of Scientific and Technical Information of China (English)

    李静

    2015-01-01

    介绍了土建工程造价指标及关联数据的含义及内容,阐述了造价指标以及关联数据在土建工程造价预结算工作中的重要性,并结合实例,对造价指标以及关联数据在土建工程预结算中的应用进行了分析,为土建工程预结算工作提供参考与借鉴。%The paper introduces the definition of the cost relevance data of the civil engineering and other contents,illustrates the cost index,and importance of the relevant data in the cost pre-settlement of civil engineering,and analyzes the application of the cost index and relevant data in the pre-settlement of civil engineering by combining with example,so as to provide some reference for the pre-settlement of the civil engineering in China.

  4. Structural Probability Concepts Adapted to Electrical Engineering

    Science.gov (United States)

    Steinberg, Eric P.; Chamis, Christos C.

    1994-01-01

    Through the use of equivalent variable analogies, the authors demonstrate how an electrical subsystem can be modeled by an equivalent structural subsystem. This allows the electrical subsystem to be probabilistically analyzed by using available structural reliability computer codes such as NESSUS. With the ability to analyze the electrical subsystem probabilistically, we can evaluate the reliability of systems that include both structural and electrical subsystems. Common examples of such systems are a structural subsystem integrated with a health-monitoring subsystem, and smart structures. Since these systems have electrical subsystems that directly affect the operation of the overall system, probabilistically analyzing them could lead to improved reliability and reduced costs. The direct effect of the electrical subsystem on the structural subsystem is of secondary order and is not considered in the scope of this work.

  5. A Service Learning Structural Engineering Capstone Course and the Assessment of Technical and Non-Technical Objectives

    Science.gov (United States)

    Dinehart, David W.; Gross, Shawn P.

    2010-01-01

    The primary role of a civil engineer is to serve the community; thus, it is essential that students understand the impact of engineering projects on, and the context of engineering projects within, society. One goal of an engineering capstone design course should be to mesh the technical knowledge of the discipline with an encompassing engineering…

  6. Study of the effects of a tornado on a nuclear plant(from the point of view of civil engineering)

    International Nuclear Information System (INIS)

    is to analyze the applicability of Regulatory Guide 1.76 design basis Tornado and Tornado Missiles for Nuclear Power Plants, assessing the guide / standard compliance of a nuclear facility with respect to it, identifying the actions required for the compliance if applicable and valuation, with engineering judgment, the benefits for the plant would total or partial implantation of the guide.

  7. Engineering structure and function using thermoresponsive biopolymers.

    Science.gov (United States)

    Pastuszka, Martha K; MacKay, J Andrew

    2016-01-01

    Self-assembly enables exquisite control at the smallest scale and generates order among macromolecular-building blocks that remain too small to be manipulated individually. Environmental cues, such as heating, can trigger the organization of these materials from individual molecules to multipartixcle assemblies with a variety of compositions and functions. Synthetic as well as biological polymers have been engineered for these purposes; however, biological strategies can offer unparalleled control over the composition of these macromolecular-building blocks. Biologic polymers are macromolecules composed of monomeric units that can be precisely tailored at the genetic level; furthermore, they can often utilize endogenous biodegradation pathways, which may enhance their potential clinical applications. DNA (nucleotides), polysaccharides (carbohydrates), and proteins (amino acids) have all been engineered to self-assemble into nanostructures in response to a change in temperature. This focus article reviews the growing body of literature exploring temperature-dependent nano-assembly of these biological macromolecules, summarizes some of their physical properties, and discusses future directions.

  8. A contribuição de Daniel Pedro Müller para a transição do ensino da Engenharia Militar para a Civil na província de São Paulo (1802-1841 * Daniel Pedro Müller’s contribution for the transition of Military to Civil Engineering education in the province...

    Directory of Open Access Journals (Sweden)

    JOSÉ ROGÉRIO BEIER

    2015-03-01

    Full Text Available Resumo: A partir da reconstituição da trajetória do engenheiro militar luso-brasileiro Daniel Pedro Müller (1785-1841, este artigo visa destacar a contribuição deste ex-agente da Coroa na transição do ensino da engenharia militar para a civil na Província de São Paulo, sobretudo, através da organização de uma escola de engenheiros construtores de estradas que funcionou, de modo intermitente, entre 1836 e 1849, formando muitos dos engenheiros civis que dirigiram obras públicas em São Paulo na segunda metade do século XIX.Palavras-chave: Engenharia Militar; São Paulo; Daniel Pedro Müller. Abstract: By reconstructing the trajectory of the luso-brazilian military engineer Daniel Pedro Müller (1785-1841, this paper aims to highlight the contribution of this former agent of the Crown in the transition from the military to civil engineering education in the Province of São Paulo, most of all, through the organization of a road builders engineering school which worked, intermittently, from 1836 to 1849, forming many of the civil engineers who worked as directors of public works in São Paulo during the second half of the 19th century.Keywords: Military engineering; São Paulo; Daniel Pedro Müller.

  9. Research onthe Construction of Campus-based Innovative Practice Base for Civil Engineering Majors---Taking Civil Engineering Majors of Beijing City University as an Example%城建类专业校内创新实践基地建设初探--以北京城市学院城建类专业为例

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    城建类专业学生的创新精神和实践能力必须通过一系列高质量的实践性教育教学环节的训练,才能够得到有效的培养。本文以北京城市学院城建类校内创新实践基地建设为例,阐述了基地“三平台”功能定位,从基地的组织管理、基地资源的配置完善、“三平台”的建设成效等方面,对基地建设情况进行了分析总结。%Only by taking part in a series of practice can the civil engineering majors’innovative spirit and practical ability be effectively trained.Taking the construction of campus-based innovative practice base for civil engineering majors of Beijing City University as an example,this paper describes “three platforms”function of innovative practice base and analyzes the base construction situation through the organization management of innovative practice base,the improvement of resources allocation and the construction of“three platforms”.

  10. Nano-Engineered Structural Joints Project

    Data.gov (United States)

    National Aeronautics and Space Administration — A versatile class of high-performance structural joints is proposed where massive interatomic bonds over the large surface areas of nanostructured surfaces...

  11. Musculoskeletal Regenerative Engineering: Biomaterials, Structures, and Small Molecules

    OpenAIRE

    Roshan James; Laurencin, Cato T.

    2014-01-01

    Musculoskeletal tissues are critical to the normal functioning of an individual and following damage or degeneration they show extremely limited endogenous regenerative capacity. The future of regenerative medicine is the combination of advanced biomaterials, structures, and cues to re-engineer/guide stem cells to yield the desired organ cells and tissues. Tissue engineering strategies were ideally suited to repair damaged tissues; however, the substitution and regeneration of large tissue vo...

  12. Data structure and software engineering challenges and improvements

    CERN Document Server

    Antonakos, James L

    2011-01-01

    Data structure and software engineering is an integral part of computer science. This volume presents new approaches and methods to knowledge sharing, brain mapping, data integration, and data storage. The author describes how to manage an organization's business process and domain data and presents new software and hardware testing methods. The book introduces a game development framework used as a learning aid in a software engineering at the university level. It also features a review of social software engineering metrics and methods for processing business information. It explains how to

  13. Methods for forewarning of critical condition changes in monitoring civil structures

    Science.gov (United States)

    Abercrombie, Robert K.; Hively, Lee M.

    2013-04-02

    Sensor modules (12) including accelerometers (20) are placed on a physical structure (10) and tri-axial accelerometer data is converted to mechanical power (P) data (41) which then processed to provide a forewarning (57) of a critical event concerning the physical structure (10). The forewarning is based on a number of occurrences of a composite measure of dissimilarity (C.sub.i) exceeding a forewarning threshold over a defined sampling time; and a forewarning signal (58) is provided to a human observer through a visual, audible or tangible signal. A forewarning of a structural failure can also be provided based on a number of occurrences of (C.sub.i) above a failure value threshold.

  14. Project W-320, 241-C-106 sluicing civil/structural calculations, Volume 7

    Energy Technology Data Exchange (ETDEWEB)

    Bailey, J.W.

    1998-07-24

    The structural skid supporting the Process Building and equipment is designed based on the criteria, codes and standards, referenced in the calculation. The final members and the associated elements satisfy the design requirements of the structure. Revision 1 incorporates vendor data for the weight of the individual equipment components. The updated information does not affect the original conclusion of the calculation, since the overall effect is a reduction in the total weight of the equipment and a nominal relocation of the center of gravity for the skid assembly.

  15. Civil Technology Applications. Teacher Edition [and] Student Edition.

    Science.gov (United States)

    Schertz, Karen

    Teacher and student editions of Civil Technology Applications are one in a series of competency-based instructional materials for drafting and civil technology programs. It includes the technical content and tasks necessary for a student to be employed as a drafter or civil technician in a civil engineering firm. Introductory pages in the teacher…

  16. Non-destructive testing for the structures and civil infrastructures characterization

    Science.gov (United States)

    Capozzoli, L.; Rizzo, E.

    2012-04-01

    This work evaluates the ability of non-conventional NDT techniques such as GPR, geoelectrical method and conventional ones such as infrared thermography (IRT) and sonic test for the characterization of building structures in laboratory and in-situ. Moreover, the integration of the different techniques were evaluated in order to reduce the degree of uncertainties associated. The presence of electromagnetic, resistivity or thermal anomalies in the behavior may be related to the presence of defects, crack, decay or moisture. The research was conducted in two phases: the first phase was performed in laboratory and the second one mainly in the field work. The laboratory experiments proceeded to calibrate the geophysical techniques GPR and geoelectrical method on building structures. A multi-layer structure was reconstructed in laboratory, in order to simulate a back-bridge: asphalt, reinforced concrete, sand and gravel layers. In the deep sandy layer, PVC, aluminum and steel pipes were introduced. This structure has also been brought to crack in a predetermined area and hidden internal fractures were investigated. GPR has allowed to characterize the panel in a non-invasive mode; radar maps were developed using various algorithms during post-process about 2D maps and 3D models with aerial acquisition of 400 MHz, 900MHz, 1500MHz, 2000MHz. Geoelectrical testing was performed with a network of 25 electrodes spaced at mutual distance of 5 cm. Two different configurations were used dipole-dipole and pole-dipole approaches. In the second phase, we proceeded to the analysis of pre-tensioned concrete in order to detect the possible presence of criticality in the structure. For this purpose by GPR 2GHz antenna, a '70 years precast bridge characterized by a high state of decay was studied; then were also analyzed a pillar and a beam of recent production directly into the processing plant. Moreover, results obtained using GPR were compared with those obtained through the use of

  17. Civil Disobedience.

    Science.gov (United States)

    Martz, Carlton

    2000-01-01

    This theme issue looks at three historical and recent instances of civil disobedience. The first article examines the Free Speech Movement, which arose on the Berkeley campus of the University of California in the 1960s. The second article recounts the struggle of Mahatma Gandhi to free India from the British Empire. The final article explores the…

  18. The Small Helm Project: an academic activity addressing international corruption for undergraduate civil engineering and construction management students.

    Science.gov (United States)

    Benzley, Steven E

    2006-04-01

    This paper presents an academic project that addresses the issue of international corruption in the engineering and construction industry, in a manner that effectively incorporates several learning experiences. The major objectives of the project are to provide the students a learning activity that will 1) make a meaningful contribution within the disciplines being studied; 2) teach by experience a significant principle that can be valuable in numerous situations during an individual's career, and 3) engage the minds, experiences, and enthusiasm of the participants in a real ethical challenge that is prevalent in all of their chosen professional fields. The paper describes the full details of the project, the actual implementation of it during Winter Semester 2005, the experiences gained during the initial trial, and the modifications and improvements incorporated for future implementation.

  19. Dismantling of nuclear facilities. From a structural engineering perspective

    International Nuclear Information System (INIS)

    The paper summarizes some important aspects, requirements and technical boundary conditions that need to be considered in dismantling projects in the nuclear sector from a structural engineering perspective. Besides general requirements regarding radiation protection, occupational safety, efficiency and cost effectiveness it is important to take into account other conditions which have a direct impact on technical details and the structural assessment of the dismantling project. These are the main aspects highlighted in this paper: - The structural assessment of dismantling projects has to be based on the as-built situation. - The limitations in terms of available equipment and space have to be taken into account. - The structural assessments are often non-standardized engineering evaluations. A selection of five dismantling projects illustrates the various structural aspects. (orig.)

  20. Electrical transport engineering of semiconductor superlattice structures

    Energy Technology Data Exchange (ETDEWEB)

    Shokri, Aliasghar, E-mail: aashokri@tpnu.ac.ir

    2014-04-01

    We investigate the influence of doping concentration on band structures of electrons and electrical transmission in a typical aperiodic semiconductor superlattice consisting of quantum well and barrier layers, theoretically. For this purpose, we assume that each unit cell of the superlattice contains alternately two types of material GaAs (as a well) and GaAlAs (as a barrier) with six sublayers of two materials. Our calculations are based on the generalized Kronig–Penny (KP) model and the transfer matrix method within the framework of the parabolic conductance band effective mass approximation in the coherent regime. This model reduces the numerical calculation time and enables us to use the transfer matrix method to investigate transport in the superlattices. We show that by varying the doping concentration and geometrical parameters, one can easily block the transmission of the electrons. The numerical results may be useful in designing of nanoenergy filter devices.

  1. Electrical transport engineering of semiconductor superlattice structures

    Science.gov (United States)

    Shokri, Aliasghar

    2014-04-01

    We investigate the influence of doping concentration on band structures of electrons and electrical transmission in a typical aperiodic semiconductor superlattice consisting of quantum well and barrier layers, theoretically. For this purpose, we assume that each unit cell of the superlattice contains alternately two types of material GaAs (as a well) and GaAlAs (as a barrier) with six sublayers of two materials. Our calculations are based on the generalized Kronig-Penny (KP) model and the transfer matrix method within the framework of the parabolic conductance band effective mass approximation in the coherent regime. This model reduces the numerical calculation time and enables us to use the transfer matrix method to investigate transport in the superlattices. We show that by varying the doping concentration and geometrical parameters, one can easily block the transmission of the electrons. The numerical results may be useful in designing of nanoenergy filter devices.

  2. Engineering computation of structures the finite element method

    CERN Document Server

    Neto, Maria Augusta; Roseiro, Luis; Cirne, José; Leal, Rogério

    2015-01-01

    This book presents theories and the main useful techniques of the Finite Element Method (FEM), with an introduction to FEM and many case studies of its use in engineering practice. It supports engineers and students to solve primarily linear problems in mechanical engineering, with a main focus on static and dynamic structural problems. Readers of this text are encouraged to discover the proper relationship between theory and practice, within the finite element method: Practice without theory is blind, but theory without practice is sterile. Beginning with elasticity basic concepts and the classical theories of stressed materials, the work goes on to apply the relationship between forces, displacements, stresses and strains on the process of modeling, simulating and designing engineered technical systems. Chapters discuss the finite element equations for static, eigenvalue analysis, as well as transient analyses. Students and practitioners using commercial FEM software will find this book very helpful. It us...

  3. 实例解析土建工程综合单价的应用%Example analysis on the application of comprehensive unit price of civil engineering

    Institute of Scientific and Technical Information of China (English)

    袁惠燕

    2012-01-01

    指出当拟建土建工程项目要求与计价表子目工作内容不完全相符时,不能直接套用综合单价,应根据不同情况分别加以换算,从土建工程实例方面进行了分析,总结了不同情况下的换算公式,归纳简化了综合单价的计算公式,从根本上解决了综合单价换算复杂的问题。%Pointed out that when the plan project requirements and the meter specific item work content doesn't agree with,not directly applied the comprehensive unit price,but also should according to different situations make respectively calculation.This paper analyzed from civil engineering examples,summarized the conversion formula under different conditions,simplified and integrated the computation formula of the comprehensive unit price,solved the conversion complex problem of comprehensive unit price from the fundamental.

  4. Innovative Talents Cultivating Model for Applied Civil Engineering Programs%应用型土木工程专业创新人才培养模式探析

    Institute of Scientific and Technical Information of China (English)

    孙路; 何延宏; 王宇; 李玉胜

    2014-01-01

    文章通过对应用型本科院校土木工程专业存在的问题进行分析,提出适合学校发展定位的校企共建办学模式,符合国际标准的创新人才培养模式,“双师型”教师队伍建设和课程与教学资源建设等一系列创新人才培养体系的构建方法,并在实践中运行、检验,在教学研究、实践能力、社会资源、学生就业和学科竞赛取得了一些实际成效,以期为同类院校提供借鉴和帮助。%The problems in the programs of civil engineering are analyzed ,based on which some suggestions are proposed .There should be a school-company collaborative training pro-gram,which complies with the international standard of talents training .The “trans-disciplina-ry” teaching team and teaching resource are also necessary .so far,the achievements in practice ( examination ,teaching research ,competence of practice ,social resource ,employment and disci-pline competition ) may of great help for schools of the same type to borrow .

  5. Two treatment methods for stormwater sediments--pilot plant and landfarming--and reuse of the treated sediments in civil engineering.

    Science.gov (United States)

    Petavy, F; Ruban, V; Conil, P; Viau, J Y; Auriol, J C

    2009-07-01

    The aim of this research was to present a pilot plant for the treatment of stormwater sediments and to compare the decontamination rate to that obtained by landfarming. The possibilities for reuse of the treated sediments in civil engineering are also studied. Four sediments from retention/infiltration ponds or from street sweeping were studied. In each case organic matter (OM), total hydrocarbons (TH) and polycyclic aromatic hydrocarbons (PAH) were measured. Geotechnical tests were carried out to evaluate the reuse possibilities of the treated sediments. Treatment by means of the pilot plant was efficient at reducing TH and PAH concentrations: THs were reduced by 53-97% and PAHs were decreased by 60-95%. By comparison, a reduction of 45-75% in TH concentration is obtained with landfarming, whereas there is no significant decrease in PAHs. Furthermore, geotechnical tests showed that the treated fractions from the pilot plant can be reused as road embankments and as a capping layer. These results are most encouraging and show that stormwater sediments can valuably be reused after treatment in a pilot plant. Landfarming is less efficient but this technique could be used as a pretreatment in the case of high TH pollution.

  6. An investigation on wireless sensors for asset management and health monitoring of civil structures

    Science.gov (United States)

    Furkan, Mustafa; Mao, Qiang; Mazzotti, Matteo; DeVitis, John; Sumitro, S. Paul; Faridazar, Fred; Aktan, A. Emin; Moon, Franklin; Bartoli, Ivan

    2016-04-01

    Application of wireless sensors and sensor networks for Structural Health Monitoring has been investigated for a long time. Key limitations for practical use are energy requirements, connectivity, and integration with existing systems. Current sensors and sensor networks mainly rely on wired connectivity for communication and external power source for energy. This paper presents a suite of wireless sensors that are low-cost, maintenance free, rugged, and have long service life. The majority of the sensors considered were designed by transforming existing, proven, and robust wired sensors into wireless units. In this study, the wireless sensors were tested in laboratory conditions for calibration and evaluation along with wired sensors. The experimental results were also compared to theoretical results. The tests mostly show satisfactory performance of the wireless units. This work is part of a broader Federal Highway Administration sponsored project intended to ultimately validate a wireless sensing system on a real, operating structure to account for all the uncertainties, environmental conditions and operational variability that are encountered in the field.

  7. Review of the seismic risk in the design of civil engineering of nuclear installations excepted the long term storage of radioactive wastes; Prise en compte du risque sismique a la conception des ouvrages de genie civil d'installations nucleaires de base a l'exception des stockages a long terme des dechets radioactifs

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    This guide aims to define, for the nuclear installations excepted the long term storage of radioactive wastes, from site data, the design specifications of earthquake resistant civil engineering and the possible methods for: the determination of the seismic response of the buildings, taking into account the interactions with the materials and the evaluation of the associated strains to size the installation; the determination of seismic displacements to be considered to size the materials. (A.L.B.)

  8. Experience of Technical Disciplines Remote Training at the St. Petersburg State University of Architecture and Civil Engineering

    Science.gov (United States)

    Glukhikh, Vladimir Nikolaevich; Norina, Natalia Vladimirovna

    2016-01-01

    This paper reveals the main trends and characteristics of the use of multimedia means in distance learning of technical subjects at graduate schools; analyses the peculiarities of presentation and perception of information in multimedia environment; and studies genre and topic structure of multimedia means used for distance learning. The author…

  9. 土木工程专业博士研究生模块化课程体系构建研究%Research on the construction of modular curriculum system for PhD of civil engineering specialty

    Institute of Scientific and Technical Information of China (English)

    陈进; 刘元雪; 曾祥蓉; 王仲刚; 张力; 张蕾; 孙涛; 周凌

    2016-01-01

    文章以后勤工程学院为例,针对土木工程专业博士研究生普遍存在的“重论文研究,轻课程学习”的倾向,提出以未来岗位需求为牵引,以创新能力提高为主导,以人才培养为目标,改革传统层次化课程体系,采用模块化课程设计,形成基础课程模块、专业课程模块、拓展课程模块、研究课程模块等四大模块课程结构,加大教学内容创新力度,使模块化课程的教学内容凸显前沿性、动态性、实践性三种特性。同时探索“硬规定、活模块”的模块化课程教学实施模式,以及任课教师授课质量和博士研究生学习成绩两方面模块化课程评价体系的构建,为创建科学合理的土木工程专业博士研究生模块化课程体系打下基础。%Aiming at the tendency of emphasis on thesis research, ignoring courses for the current PhD in civil engineering of our university, we proposed that taking requirements of future job as traction, enhance of innovation capability as leading , and talent training as the goal, reform the traditional hierarchical course system by modular design, and form four modules structure including basis curriculum modules, specialty curriculum modules, expanding curriculum modules, research curriculum modules. And we increase innovation of teaching content which highlight three properties of cutting-edge, dynamic and practical, and explore the modular curriculum teaching implementation mode of hard stipulates living module, as well as construction of two modular curriculum evaluation system including classroom teaching quality and PhD students academic evaluation , so as to build a scientific and rational PhD modular curriculum system in civil engineering.

  10. Glucoamylase: structure/function relationships, and protein engineering

    DEFF Research Database (Denmark)

    Sauer, J; Sigurskjold, B W; Christensen, U;

    2000-01-01

    fundamental structure/function relationships in the binding and catalytic mechanisms. In parallel, issues of relevance for application have been pursued using protein engineering to improve the industrial properties. The present review focuses on recent findings on the catalytic site, mechanism of action...

  11. A new generation of computational tools in structural engineering

    International Nuclear Information System (INIS)

    The new concepts of operators and typed objects changed considerably the programming capacities for the finite element method in structural engineering. Their greater versatility offers many advantages: especially the user's capacity to modify or improve an algorithm just by changing the dataset and this without and help from the developping team

  12. Dynamic design of automotive systems: Engine mounts and structural joints

    Indian Academy of Sciences (India)

    R Singh

    2000-06-01

    Dynamic design and vibro-acoustic modelling issues for automotive structures are illustrated via two case studies. The first case examines the role performance of passive and adaptive hydraulic engine mounts. In the second, the importance of welded joints and adhesives in vehicle bodies and chassis structures is highlighted via generic 'T' and 'L' beams assemblies. In each case, analytical and experimental results are presented. Unresolved research issues are briefly discussed.

  13. Civil society sphericules

    DEFF Research Database (Denmark)

    Tufte, Thomas

    2014-01-01

    the organization strategizes about and seeks to articulate amongst Tanzanian youth. Situated in the ‘perverse confluence’ (Dagnino, 2011) between neoliberal and radical democratic agendas in the communicative practices of civil society-driven media platforms, Femina navigates between identities as an NGO, a social...... movement and a media initiative. In the context of the growing literature on social networking sites and their affordances, dynamics and structures, the case of Femina illustrates how a civil society sphericule emerges within the dynamic co-evolution of new and old media platforms. The study is furthermore...... an example of the difficult shift in civil society practice, from service provision to an agenda of public service monitoring, social accountability and community engagement....

  14. 加强软土地基施工管理,提高土木工程施工质量%Enhancing Soft Soil Foundation Construction Management and Improving Civil Engineering Construction Quality

    Institute of Scientific and Technical Information of China (English)

    王秀娟

    2014-01-01

    在土木工程中,加强软土地基施工管理,能够对整个工程施工质量进行提高。其中在软土地基施工管理中,首先要对软土地地基加固处理技术进行管理。下面本文就对土木工程软土地基施工管理技术进行探讨。%In civil engineering, enhancing soft soil foundation construction management can be helpful for improving the construction quality of the whole project. In soft soil foundation construction management, the first thing to do is supervise and control the soft soil foundation reinforcement technology. This paper discusses the soft soil foundation construction management technology in civil engineering.

  15. The Application of Prestressed Concrete Technology in Industrial and Civil Engineering Construction%预应力混凝土技术在工民建施工中的应用

    Institute of Scientific and Technical Information of China (English)

    郝玉通

    2014-01-01

    随着大跨度的需求越来越大,普通混凝土已经不能满足要求,预应力混凝土应运而生。预应力混凝土构件抗裂度及刚度大大提高、耐久性增加、节约混凝土、自重较轻等优点,让大跨度跨江大桥,高强度、超高层建筑成为可能。本文主要阐述预应力混凝土在工民建中的广泛应用。%Along with the demand of large span is more and more big, the ordinary concrete has been unable to meet the requirements prestressed concrete emerged as the times require. Advantages of prestressed concrete structure crack and stif ne-ss greatly increased, increased durability, concrete saving, ligh-ter weight, let the big span bridge across the river, high streng-th and super high-rise buildings become possible. This paper mainly discusses applications of prestressed concrete in indus-trial and civil engineering.

  16. Experimental Assessment of the Emissions Control Potential of a Rich/Quench/Lean Combustor for High Speed Civil Transport Aircraft Engines

    Science.gov (United States)

    Rosfjord, T. J.; Padget, F. C.; Tacina, Robert R. (Technical Monitor)

    2001-01-01

    In support of Pratt & Whitney efforts to define the Rich burn/Quick mix/Lean burn (RQL) combustor for the High Speed Civil Transport (HSCT) aircraft engine, UTRC conducted a flametube-scale study of the RQL concept. Extensive combustor testing was performed at the Supersonic Cruise (SSC) condition of a HSCT engine cycle, Data obtained from probe traverses near the exit of the mixing section confirmed that the mixing section was the critical component in controlling combustor emissions. Circular-hole configurations, which produced rapidly-, highly-penetrating jets, were most effective in limiting NOx. The spatial profiles of NOx and CO at the mixer exit were not directly interpretable using a simple flow model based on jet penetration, and a greater understanding of the flow and chemical processes in this section are required to optimize it. Neither the rich-combustor equivalence ratio nor its residence time was a direct contributor to the exit NOx. Based on this study, it was also concluded that (1) While NOx formation in both the mixing section and the lean combustor contribute to the overall emission, the NOx formation in the mixing section dominates. The gas composition exiting the rich combustor can be reasonably represented by the equilibrium composition corresponding to the rich combustor operating condition. Negligible NOx exits the rich combustor. (2) At the SSC condition, the oxidation processes occurring in the mixing section consume 99 percent of the CO exiting the rich combustor. Soot formed in the rich combustor is also highly oxidized, with combustor exit SAE Smoke Number emissions control at SSC also performed better at part-power conditions. Data from mixer exit traverses reflected the expected mixing behavior for off-design jet to crossflow momentum-flux ratios. (4) Low power operating conditions require that the RQL combustor operate as a lean-lean combustor to achieve low CO and high efficiency. (5) A RQL combustor can achieve the emissions goal

  17. 新加坡土木工程高等教育国际化的主要做法及启示%Internationalization of higher education in civil engineering of Singapore: measures and revelation

    Institute of Scientific and Technical Information of China (English)

    陈曦

    2011-01-01

    The remarkable achievements attained by higher education of civil engineering in Singapore have been widely recognized.Chinese is the main composition of Singaporean,the culture of Singapore is the same with China,so compared with other countries its higher education has much more reference to Chinese higher education in civil engineering.Referring to the higher education of civil engineering in Singapore,the strategies adopted during the internationalization process of its higher education are introduced.Some opinions are expressed and some advices are given,hoping that they should be beneficial to the internationalization of higher education of civil engineering in China.%新加坡土木工程高等教育所取得的显著成绩已经得到世界广泛认同。新加坡以华人为主体,文化传统与中国相似,与其他发达国家相比,新加坡土木工程高等教育对中国土木工程高等教育的国际化更具借鉴意义。笔者以新加坡土木工程高等教育为例,分析了其先进之处及其国际化所采用的策略,并从土木工程学科、教学体系,基础设施和科研环境、师资力量,以及生源等方面为中国土木工程高等教育的发展和国际化提出了若干建议,以期对中国土木工程高等教育的国际化发展有所裨益。

  18. Structure and Performance of the Meta Inference Engine

    Directory of Open Access Journals (Sweden)

    Jean M. NIGRO

    2007-01-01

    Full Text Available This study presents the structure and the performance of a new inference engine: the MIE (Meta Inference Engine. It is able to manipulate not only the rules but also the metarules. The article first describes the architecture of the MIE and gives an example to illustrate its use. A comparison of performance between an RETE network and the MIE is then made. This shows that the MIE is more efficient at manipulating metaknowledge (metarules but that an RETE network is quicker when the system inserts or deletes a fact

  19. Modern thermodynamics from heat engines to dissipative structures

    CERN Document Server

    Kondepudi, Dilip

    2014-01-01

    Modern Thermodynamics: From Heat Engines to Dissipative Structures, Second Edition presents a comprehensive introduction to 20th century thermodynamics that can be applied to both equilibrium and non-equilibrium systems, unifying what was traditionally divided into 'thermodynamics' and 'kinetics' into one theory of irreversible processes. This comprehensive text, suitable for introductory as well as advanced courses on thermodynamics, has been widely used by chemists, physicists, engineers and geologists.  Fully revised and expanded, this new edition includes the following updates and featur

  20. Engineering of spatial solitons in two-period QPM structures

    DEFF Research Database (Denmark)

    Johansen, Steffen Kjær; Carrasco, Silvia; Torner, Lluis;

    2002-01-01

    We report on a scheme which might make it practically possible to engineer the effective competing nonlinearities that on average govern the light propagation in quasi-phase-matching (QPM) gratings. Modulation of the QPM period with a second longer period, introduces an extra degree of freedom......, which can be used to engineer the effective quadratic and induced cubic nonlinearity. However, in contrast to former work here we use a simple phase-reversal grating for the modulation, which is practically realizable and has already been fabricated. Furthermore, we develop the theory for arbitrary...... sample than in homogeneous structures. © 2002 Elsevier Science B.V. All rights reserved....

  1. First Canadian workshop on engineering structural integrity : CWESI. Proceedings

    International Nuclear Information System (INIS)

    The First Canadian Workshop on Engineering Structural Integrity (CWESI) was held on October 16 and 17, 2002, in Toronto, Canada. The purpose of the Workshop was to review strategies for ESI in a number of key industries, and to attempt to plot a course for co-operation in ESI activities and implementation of ESI initiatives in Canadian industry, together with support for appropriate educational, research and development activities. The Workshop consisted of presentations by speakers from a number of industries. Presentations focused on in-service experience under service conditions related to the Canadian environment. This Workshop was attended by practising structural integrity engineers, managers with the responsibility for delivery of safe and reliable operation, and researchers in the structural integrity area

  2. Exploration of Quality Control Measures in the Management of Civil Engineering Construction%土木工程管理施工过程质量控制措施探究

    Institute of Scientific and Technical Information of China (English)

    杨东

    2014-01-01

    This paper mainly analyzed some common loo- pholes and problems of quality control measures in the mana- gement of civil engineering construction and elaborated, in the current situation, the importance of strengthening the constru- ction quality control of civil engineering management. At the same time, the author studied the problems existing in the civil engineering construction management and hoped it to be he- lpful to the construction personnel.%本文主要分析了土木工程管理施工过程质量控制措施中常见的一些管理漏洞和存在问题,阐述了在当前形势下,加强土木工程管理施工质量控制的重要性。同时针对目前土木工程管理施工工作中存在的问题进行了研究,希望能对施工人员有所借鉴。

  3. A Comparative Study on Physical Vulnerability of Urban Area against Natural Hazards: Importance of Health Promoting Approach in Civil Engineering

    Directory of Open Access Journals (Sweden)

    Mohsen Ahadnezhad Reveshty

    2014-07-01

    Full Text Available Background: Estimation of urban vulnerability to earthquakes can be considered as an Ill-structured problem in urban in both unplanned and planned ar-eas. Multi-criteria evaluation (MCE provides a way to integrate different spatial data layers in a geographic information system to create composite maps representing risk. We utilized MCE in a raster Geographic Information System (GIS to evaluate risk in vulnerable tissues of Tabriz, Iran zone. Methods: In this MCE physical risk factors and sub-factors were included and were weighted by experts. Afterward data entered to GIS and then the layers of the criteria were exported. The obtained results were entered to IDRISI and fuzzified. Ultimately the final map of physical vulnerability was outputted by overlaying order. Results: Vulnerable tissues are highly consistent to non-official areas. How-ever, the planned area which is called Valiasr is in low risky condition and this condition is desirable in crisis times. Here, we observe the preference of physical pre-planning operations. Conclusion: The links between urban planning and health are many and varied. Environmental, social and economic conditions in cities can have both positive and negative influences on human health and centre. Urban planning and related professions play an important role in shaping those conditions.

  4. Mechanical networks model for the truss system in structural engineering

    Directory of Open Access Journals (Sweden)

    Kesheng Wang

    1990-07-01

    Full Text Available This paper demonstrates how to use a mechanical networks model to analyse a three-dimensional truss system in structural engineering. A three-dimensional numerical example with a complete program written in the APL programming language is presented. The principles and concepts of this method are easily understood, and the formulation and computation of the problem can be carried out systematically and consistently. The main purpose is to develop a uniform, systematic theory and method which can be employed in the design process to analyse and synthesise a great number of engineering or non-engineering systems, such as mechanical, electrical, economic systems. The mechanical networks model presented in this paper has proved to be ideal for this type of analysis.

  5. Description of Re-manufacture Project of Civil Aircraft Structure%民用飞机结构再制造工程概论

    Institute of Scientific and Technical Information of China (English)

    范耀宇

    2015-01-01

    This article states the status of re-manufacture, typical re-manufacture process. It is also planning the method, outline and critical issues of civil airplane structure re-manufacture program from the top level.%阐述再制造工程现状、典型工艺,并从顶层规划了民机结构再制造工程研究思路、总体框架和关键技术。

  6. Fatigue in engineering structures. A three fold analysis approach

    International Nuclear Information System (INIS)

    The integrity in most of the engineering structures in influenced by the presence of cracks or crack like defects. These structures fail, even catastrophically if a crack greater than a critically safe size exist. Although most of the optimal designed structures are initially free from critical cracks, sub-critical cracks can lead to failures under cyclic loadings, called fatigue crack growth. It is nearly impractical to prevent sub-critical crack growth in engineering structures particularly in crack sensitive structures like most of the structures in nuclear, aerospace and aeronautical domains. However, it is essential to predict the fatigue crack growth for these structures to preclude the in service failures causing loss of assets. The present research presents an automatic procedure for the prediction of fatigue crack growth in three dimensional engineering structures and the key data for the fracture mechanics based design: the stress intensity factors. Three fold analysis procedures are adopted to investigate the effects of repetitive (cyclic) loadings on the fatigue life of different geometries of aluminum alloy 2219-O. A general purpose Finite Element (FE) Code ANSYS-8.0 is used to predict/estimate the fatigue life of the geometries. Computer codes utilizing the Green's Function are developed to calculate the stress intensity factors. Another code based on superposition technique presented by Shivakumara and Foreman is developed to calculate the fatigue crack growth rate, fatigue life (No. of loading cycles are developed to validate the results and finally full scale laboratory tests are conducted for the comparison of the results. The results showing a close co-relation between the different techniques employed gives the promising feature of the analysis approach for the future work. (author)

  7. Engineering Design of a Multipurpose X-band Accelerating Structure

    CERN Document Server

    Gudkov, Dmitry; Samoshkin, Alexander; Zennaro, Riccardo; Dehler, Micha; Raguin, Jean-Yves

    2010-01-01

    Both FEL projects, SwissFEL and Fermi-Elettra each require an X-band RF accelerating structure for optimal bunch compression at the respective injectors. As the CLIC project is pursuing a program for producing and testing the X-band high-gradient RF structures, a collaboration between PSI, Elettra and CERN has been established to build a multipurpose X-band accelerating structure. This paper focuses on its engineering design, which is based on the disked cells jointed together by diffusion bonding. Vacuum brazing and laser beam welding is used for auxiliary components. The accelerating structure consists of two coupler subassemblies, 73 disks and includes a wakefield monitor and diagnostic waveguides. The engineering study includes the external cooling system, consisting of two parallel cooling circuits and an RF tuning system, which allows phase advance tuning of the cell by deforming the outer wall. The engineering solution for the installation and sealing of the wake field monitor feed-through devices that...

  8. Impact of the Ownership Structure on Corporate Management in Engineering

    Directory of Open Access Journals (Sweden)

    Dieieva Nataliia E.

    2014-02-01

    Full Text Available The article analyses impact of the ownership structure on corporate management in the engineering industry of Ukraine. In order to detect impact of the structure of corporate ownership on corporate management the article uses general scientific and special methods of study: method of critical analysis and generalisation of theoretical studies, comparison method and statistical method. Analysis of engineering enterprises confirmed availability of impact of the structure of corporate ownership on corporate management. The article also shows that the engineering industry of Ukraine is characterised with the concentrated ownership structure, which has the following features: restriction of rights of minority shareholders with respect to management and control in a joint stock company; availability of corporate conflicts between majority and minority shareholders; availability of intense control of owners over management, which influences efficiency of making managerial decisions; hired managers and enterprise employees have no possibility to acquire stock of a joint stock company including in the form of bonuses and incentives; the controlling owner is interested in efficient activity of the enterprise and tries to create necessary conditions for this. The conducted studies give a possibility to establish that a share of stock that belongs to a hired executive body is smaller in those joint stock companies in which concentration of ownership is higher. The article also shows that the higher ownership concentration the higher is the probability that the owner would be a part of controlling bodies.

  9. 塑料模板在建筑工程中的应用研究%Study on the Application of Plastic Formwork in Civil Engineering

    Institute of Scientific and Technical Information of China (English)

    余少乐; 张其林; 陈海洲; 王国欣; 张晓勇

    2014-01-01

    塑料模板作为一种新型的绿色建筑模板,不仅可以进行多次建筑施工周转,加快工程进度,提高工程质量,降低劳动强度,减少投入,还具有质量小、耐腐蚀性好等优点,作为节能环保产品被广泛推广使用。针对目前国内外塑料模板的使用现状,对塑料模板的性能进行了力学研究,提出了可以改进的几种使用功能,这些功能拓宽了塑料模板在建筑工程中的应用。%As a green construction formwork, the plastic formwork can increase the turnover rate of formwork, speed up construction progress, improve construction quality, lower working strength and reduce input. Moreover, it has the advantages of light quality and good anti-corrosion property. It has been widely popularized and applied in our country as energy saving and environmental protection products . It is introduced in brief that the domestic and foreign employed situation of plastic formwork, and its mechanical performance was investigated and a number of ways in which the use function could be improved were suggested. These new functions would broaden the application of plastic formwork in civil engineering.

  10. On the Need for Reliable Seismic Input Assessment for Optimized Design and Retrofit of Seismically Isolated Civil and Industrial Structures, Equipment, and Cultural Heritage

    Science.gov (United States)

    Martelli, Alessandro

    2011-01-01

    Based on the experience of recent violent earthquakes, the limits of the methods that are currently used for the definition of seismic hazard are becoming more and more evident to several seismic engineers. Considerable improvement is felt necessary not only for the seismic classification of the territory (for which the probabilistic seismic hazard assessment—PSHA—is generally adopted at present), but also for the evaluation of local amplification. With regard to the first item, among others, a better knowledge of fault extension and near-fault effects is judged essential. The aforesaid improvements are particularly important for the design of seismically isolated structures, which relies on displacement. Thus, such a design requires an accurate definition of the maximum value of displacement corresponding to the isolation period, and a reliable evaluation of the earthquake energy content at the low frequencies that are typical of the isolated structures, for the site and ground of interest. These evaluations shall include possible near-fault effects even in the vertical direction; for the construction of high-risk plants and components and retrofit of some cultural heritage, they shall be performed for earthquakes characterized by very long return periods. The design displacement shall not be underestimated, but neither be excessively overestimated, at least when using rubber bearings in the seismic isolation (SI) system. In fact, by decreasing transverse deformation of such SI systems below a certain value, their horizontal stiffness increases. Thus, should a structure (e.g. a civil defence centre, a masterpiece, etc.) protected in the aforesaid way be designed to withstand an unnecessarily too large earthquake, the behaviour of its SI system will be inadequate (i.e. it will be too stiff) during much more frequent events, which may really strike the structure during its life. Furthermore, since SI can be used only when the room available to the structure

  11. Biodegradable polymeric microcarriers with controllable porous structure for tissue engineering.

    Science.gov (United States)

    Shi, Xudong; Sun, Lei; Jiang, Jian; Zhang, Xiaolin; Ding, Wenjun; Gan, Zhihua

    2009-12-01

    Porous microspheres fabricated by biodegradable polymers show great potential as microcarriers for cell cultivation in tissue engineering. Herein biodegradable poly(DL-lactide) (PLA) was used to fabricate porous microspheres through a modified double emulsion solvent evaporation method. The influence of fabrication parameters, such as the stirring speed of the primary and secondary emulsion, the polymer concentration of the oil phase, and solvent type, as well as the post-hydrolysis treatment of the porous structure of the PLA microspheres are discussed. Good attachment and an active spread of MG-63 cells on the microspheres is observed, which indicates that the PLA microspheres with controllable porous structure are of great potential as cell delivery carriers for tissue engineering. PMID:19821453

  12. The Structural Engineering Challenges Following the Wenchuan Earthquake

    Institute of Scientific and Technical Information of China (English)

    GRUNDY Paul

    2009-01-01

    Ihe 5 · 12 Wenchuan Larthquake presents two challenges-reconstruction of the devastated areas and building adequate seismic resistance into the rest of China. The stages in recovery include structural condition assessment , identification of seismic weaknesses, appreciation of the variable seismicity of PR China, the development of a seismic performance index to aid the decision to relocate, rebuild or retrofit, development and application of the principles of retrofitting which recycles rubble and waste from Wenchuan "5 ? 12" , with an emphasis on integrating masonry construction into seismic resistance. The recovery and resilience achieved through structural engineering must be integrated into a broader community involvement in disaster risk reduction.

  13. ATLAS: civil engineering Point 1

    CERN Multimedia

    2000-01-01

    The ATLAS experimental area is located in Point 1, just across the main CERN entrance, in the commune of Meyrin. There people are busy to finish the different infrastructures for ATLAS. Real underground video. Nice view from the surface to the cavern from the pit side - all the big machines looked very small. The film has original working sound.

  14. ATLAS Civil Engineering Point 1

    CERN Multimedia

    Jean-Claude Vialis

    1998-01-01

    Different phases of the PX 15 realisation to Point 1: zone of the ATLAS experiment 19-11-1998 Realisation of the Walkway for PX 15 and the putting up scaffolds 15-01-1999 Film from the surface of Point 1 and descent in the well of PX 15

  15. ATLAS Civil Engineering Point 1

    CERN Multimedia

    2000-01-01

    Different phases of realisation to Point 1: zone of the ATLAS experiment 18-10-2000 UX 15 cavern and PX16 15-12-2000 USA 15 - UX 15 concreting the arch 14-02-2001 UX 15 - ancrages, isolation and scaffolding

  16. ATLAS: civil engineering Point 1

    CERN Multimedia

    1998-01-01

    Different phases of the SX 15 realisation to Point 1 : zone of the ATLAS experiment 00:13:43 Realization of the concrete floor 19-10-1998 00:29:26 Putting up the metal rails for the roof 19-10-1998 00:33:42 Road alignment entering to POINT1 and in Bollot wood 27-10-1998 00:41:53 General sight of the buildings in construction Building SX gives the cover for the work at the experiment It is used to shelter the Pit and the work for the underground cavern as well as for covering the ground work with big cranes that allows the lowering of the components belonging to the detector. The hall is also used as a detector part storage and cover during the assembly. It shelters small workshops of mechanics and electronics necessary for the assembly and the maintenance of the ATLAS experiment.

  17. ATLAS Civil Engineering Point 1

    CERN Multimedia

    Jean-Claude Vialis

    2000-01-01

    Different phases of realisation to Point 1 : zone of the ATLAS experiment The ATLAS experimental area is located in Point 1, just across the main CERN entrance, in the commune of Meyrin. There people are ever so busy to finish the different infrastructures for ATLAS. Real underground video. When passing throw the walls the succeeding can be heard and seen. The film has original working sound.

  18. ATLAS Civil Engineering Point 1

    CERN Multimedia

    Jean-Claude Vialis

    2000-01-01

    Point 1 -the zone for the ATLAS experiment. The film includes various stages of construction, especially from the pit of UX 15. Underground work includes the excavation work of the cavern, demolishing the central pillars and posing the support bars for the pit. The UX 15 - will shelter the detector itself. The cavern is located about 100 m below the surface and it is 53 m long, 30 m wide and 34.90 m high.

  19. ATLAS Civil Engineering Point 1

    CERN Multimedia

    Jean-Claude Vialis

    2000-01-01

    Different phases of realisation to Point 1 : zone of the ATLAS experiment The film is about the excavation work in the cavern and tunnels of ATLAS experiment in the point 1. You can see people working for iron mounting at the side of the pit where the parts of the detector will be lowered in the future. Partly the film concentrates the USA 15 and the work done there.

  20. ATLAS Civil Engineering Point 1

    CERN Multimedia

    Jean-Claude Vialis

    1999-01-01

    Different phases of realisation to Point 1 : zone of the ATLAS experiment The ATLAS experimental area is located in Point 1, just across the main CERN entrance, in the commune of Meyrin. There people are ever so busy to finish the different infrastructures for ATLAS. Real underground video. The film has original working sound.