WorldWideScience

Sample records for piers wharves

  1. 33 CFR 127.103 - Piers and wharves.

    Science.gov (United States)

    2010-07-01

    ...) WATERFRONT FACILITIES WATERFRONT FACILITIES HANDLING LIQUEFIED NATURAL GAS AND LIQUEFIED HAZARDOUS GAS Waterfront Facilities Handling Liquefied Natural Gas § 127.103 Piers and wharves. (a) If the...

  2. Crude Imports Triggers Investment Fever of Oil Wharves in China

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    @@ China's record high crude import of 80 million tons in 2003 has triggered a fever of oil wharf construction along the country's eastern coastal regions. Reportedly, the coastal harbor cities, such as Dalian, Tianjin, Qingdao, Nantong, Ningbo,Zhoushan, Maoming and Zhanjiang, have stepped up the efforts for construction of wharves, the large-scale berths for oil products in particular, so as to stimulate the rapid development of the local petrochemical and commodity flow industries.

  3. Probabilistic Assessment for Seismic Performance of Pile-Supported Wharves

    Directory of Open Access Journals (Sweden)

    Hamid Heidary Torkamani

    2013-03-01

    Full Text Available The main objective of this study is to investigate the influence of uncertainties associated with the material properties on the seismic performance of pile-supported wharves. For this purpose a two-dimensional finite difference model, representing typical pile-supported wharf structures from western United States has been constructed using software FLAC2D. Incremental dynamic analysis has been applied to evaluate the response of wharf structure under different levels of seismic loading. The uncertainties at both structural and geotechnical parameters have been investigated using a tornado diagram and a first-Order Second-Moment (FOSM analysis. It has been found that the uncertainties at the dead load of structure, friction angle of rock fill and the porosity of rock fill contribute most to the variability of the displacement ductility factor of the pile-supported wharf structures. Based on the results, design considerations have been provided.

  4. Repercussions of embarkation wharves in Lakshadweep Islands on coral communities and their ecology

    Digital Repository Service at National Institute of Oceanography (India)

    Ravindran, J.; Manikandan, B.; Venkatesh, M.; ManiMurali, R.; Marimuthu, N.; Wafar, M.V.M.

    Present study infers that the construction of embarkation wharves in four of the Lakshadweep islands (Agatti, Amini, Kavaratti and Minicoy) in the last 5 years was accompanied by a marked degradation of coral community structure and coral...

  5. Effect of pier shape and pier alignment on the equilibrium scour depth at single piers

    Institute of Scientific and Technical Information of China (English)

    Cristina Fael; Rui Lança; António Cardoso

    2016-01-01

    The equilibrium scour depth at uniform single bridge piers depends on a large number of variables, including the pier horizontal cross-section shape and its alignment angle towards the flow direction. The influence of these variables has been studied by only a few researchers, mostly, on the basis of tests that were far from approaching equilibrium. This experimental study aims at revisiting the influence of piers' shape and alignment on local scouring for length–width ratios smaller than or equal to 4, by increasing the experimental evidence. Fifty five long-duration laboratory tests were run under steady, clear-water flow, close to the threshold for initiation of sediment motion. Five pier shapes were considered:circular, rectangular square-nosed, rectangular round-nosed, oblong, and zero-spacing (packed) pile-groups;the tested skew-angles were 0°, 30°, 45°, 60°, and 90°. It was concluded that i) the shape factor can be taken as 1.0, for rectangular round-nosed and oblong cross-section piers, and as 1.2, for rectangular square-nosed and packed pile-group cross-section piers, ii) the shape factor does not vary significantly with the duration of tests, this way confirming the robustness of the shape factors reported to date, iii) the effect of shape is present at skewed piers although the associated coefficients remain in the narrow range of 1.0–1.2, and iv) for length–width ratios smaller than 4, the shape factor is of the same order of magnitude as the skew angle factor and should not be neglected.

  6. Docks and Piers, Fishing Piers in, Published in unknown, Manatee County Information Services Dept..

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Docks and Piers dataset as of unknown. It is described as 'Fishing Piers in'. Data by this publisher are often provided in State Plane coordinate system; in a...

  7. Ocean Disposal of Man-Made Ice Piers

    Science.gov (United States)

    The National Science Foundation is permitted to ocean dump man-made ice piers from its base at McMurdo Sound in Antarctica under a MPRSA general permit. Information is provided about ice piers and impacts of ice pier disposal.

  8. 21 CFR 1240.86 - Protection of pier water system.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Protection of pier water system. 1240.86 Section... DISEASES Source and Use of Potable Water § 1240.86 Protection of pier water system. No vessel engaged in interstate traffic shall make a connection between its nonpotable water system and any pier potable...

  9. Falling aprons at circular piers under currents

    NARCIS (Netherlands)

    De Sonneville, B.; Van Velzen, G.; Verheij, H.J.; Dorst, K.

    2012-01-01

    Traditional guidelines on rock protection at circular piers predominantly focus on preventing shear failure (by choosing a sufficiently large rock size), winnowing failure (by designing an appropriate filter) and edge failure (by selecting a sufficient extent). In particular areas (e.g. in an erodin

  10. Conceptual Design of Navy Floating Pier.

    Science.gov (United States)

    1982-09-01

    which do not have existing flood basins or dry dock facilities. 3.1.3 The Advantages As Navy Piers The floating pier provides a structure well suited to...Bureau of Yards and Docks built 13 reinforced concrete floating repair docks each of 280 ton lift capacity. Bach dock was 390 ft. long, 80 ft. wide and...4 176CK ApoQ &LLKHC-AP6, COLUMNN AND eAr4b V~JricAL- roA~~scN LY T’B 4OPr~C-. I200-+0k 𔄀 CELLO £TNAT STRUCTUARAL EN4GINEERING " NrE FZ IR MJUə

  11. Hysteretic behavior of prestressed concrete bridge pier with fiber model.

    Science.gov (United States)

    Wang, Hui-li; Feng, Guang-qi; Qin, Si-feng

    2014-01-01

    The hysteretic behavior and seismic characteristics of the prestressed concrete bridge pier were researched. The effects of the prestressed tendon ratio, the longitudinal reinforcement ratio, and the stirrup reinforcement ratio on the hysteretic behavior and seismic characteristics of the prestressed concrete bridge pier have been obtained with the fiber model analysis method. The analysis show some results about the prestressed concrete bridge pier. Firstly, greater prestressed tendon ratio and more longitudinal reinforcement can lead to more obvious pier's hysteresis loop "pinching effect," smaller residual displacement, and lower energy dissipation capacity. Secondly, the greater the stirrup reinforcement ratio is, the greater the hysteresis loop area is. That also means that bridge piers will have better ductility and stronger shear capacity. The results of the research will provide a theoretical basis for the hysteretic behavior analysis of the prestressed concrete pier.

  12. Theology and practice in Piers Plowman

    Directory of Open Access Journals (Sweden)

    D. Levey

    1995-05-01

    Full Text Available The fourteenth-century English poem Piers Plowman, by William Langland, tells of a quest for and pilgrimage to Truth, or God. The poem is lengthy and diffuse, and evidences Langland’s keen interest in philosophy, theology, politics, social conditions and apocalyptic literature, to mention only some areas. Underlying all, however, is a concern with the practical living-out of abstruse doctrinal concepts in everyday life. This essay explores certain characters and concepts which embody the doctrine and practice of charity, in order to demonstrate the interweaving of theory and practice which characterizes Langland at his best.

  13. Impact of bridge pier on the stability of ice jam

    Institute of Scientific and Technical Information of China (English)

    王军; 施发义; 陈胖胖

    2015-01-01

    River ice jam is one of the most important issues in rivers in cold regions during winter time. With the extra solid boundary due to the ice cover, the flow condition under ice-covered conditions is completely different from that of a open channel flow. The presence of bridge piers will further change the velocity field around the bridge piers. As a consequence, the formation and the accumulation of ice jams in the vicinity of the bridge pier will be affected. On the other side, the formation of an ice jam around the piers can cause extra turbulence to reduce the stability of a river bridge. The present study focuses on the stress analysis of the ice jam in the vicinity of a bridge pier. By developing a governing equation for describing the equilibrium state of an ice jam, the stability of the ice jam around bridge piers is analyzed and determined. As seen from the field data in literature, the stability estimations of an ice jam around bridge piers determined by the present method agree well with the field observations. Therefore, the proposed approach can be used for the prediction of the formation of ice jams around bridge piers.

  14. SCOUR MITIGATION AT BRIDGE PIERS USING SACRIFICIAL PILES

    Institute of Scientific and Technical Information of China (English)

    M. Anisul HAQUE; Md. Munsur RAHMAN; G.M. Tarekul ISLAM; M. Asad HUSSAIN

    2007-01-01

    To mitigate scour around bridge piers, sacrificial piles are economic method where natural processes are involved. The arrangement should be such that scoured materials from the sacrificial piles should have enough volume to fill the scour hole created upstream of the pier in such a way that sediments are trapped inside the scour hole. This concept differs from earlier study made with sacrificial piles that mainly deals to reduce the strength of horseshoe vortex. To determine the effect of sacrificial piles for scour mitigation, alternative arrangements of piles were tested in front of a rectangular pier under clear-water condition and found that when the group of piles is placed at a distance of twice the projected width of the pier, for which percentage of blockage of the pier width is 60%, the scour volume can be reduced upto 61% while the maximum scour depth can be reduced upto 50%.

  15. USE OF SURFACE GUIDE PANELS AS PIER SCOUR COUNTERMEASURES

    Institute of Scientific and Technical Information of China (English)

    Chin-Kun HUANG; Chii-Jau TANG; Ting-Yuan KUO

    2005-01-01

    This paper presents a laboratory study on bridge pier protection with surface guide panels (SGP) in clear-water experiments. The SGP is installed by piercing a set of two vertical panels partially into the water, with some interior angle and leading opening, setting at a distance ahead of the protected pier. The suitable installation of the SGP can effectively adjust the flow pattern to reduce the downflow motion and the horseshoe vortex ahead of the pier. We consider some dominant factors to set up SGP for pier protection, including the interior angle θ, leading opening Ow, distance between panel and pier L, submerged depth of panel Pd, pier diameter D and water depth H. After evaluation of these parameters through laboratory tests, the optimal setup conditions of θ=60o, Ow/D=0.1~0.2, L/D=2~2.5 and Pd/H=0.7 are determined. Under these conditions, the usage of SGP leads to a best performance on decrement of the maximum scour depth at pier up to 90% with ignorable side effects on the SGP scour.

  16. Research on Local Scour at Bridge Pier under Tidal Action

    Directory of Open Access Journals (Sweden)

    Wang Jianping

    2015-01-01

    Full Text Available Through the local scour test at bridge pier under tidal action in a long time series, this paper observes the growing trend of the deepest point of local scour at bridge pier under tidal conditions with different characteristic parameters, analyzes the impact of repeat sediment erosion and deposition in the scouring pit caused by reversing current on the development process of the scouring pit, and clarifies the relation between the tide and local scouring depth at bridge pier under steady flow conditions, so as to provide a scientific basis for bridge design and safe operation of estuary and harbor areas.

  17. Docks and Piers, Pier point, line, and polygon locations within Iredell County, NC, Published in 2005, 1:2400 (1in=200ft) scale, Iredell County GIS.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Docks and Piers dataset, published at 1:2400 (1in=200ft) scale, was produced all or in part from Orthoimagery information as of 2005. It is described as 'Pier...

  18. 18 CFR 1304.204 - Docks, piers, and boathouses.

    Science.gov (United States)

    2010-04-01

    ... required to submit accurate drawings with dimensions of all proposed facilities. (a) Docks, piers... the four walls are constructed of wire or screen mesh from floor to ceiling, and the wire or screen...

  19. Seismic Behavior of Fatigue-Retrofitted Steel Frame Piers

    Directory of Open Access Journals (Sweden)

    Kinoshita K.

    2013-01-01

    Full Text Available Fatigue retrofit works have been conducted on severely fatigue damaged beam-to-column connections of existing steel frame bridge piers in Japan. It is clear that retrofit works provides additional stiffness but the significance on the seismic behavior of steel frame piers is not clear. Since fatigue retrofit works have become prevalent, the effect of fatigue retrofit works on the seismic behavior of steel frame piers need to be understood. The objective of this study is therefore to investigate these effects of the retrofit work, especially installation of bolted splices, which is the most common technique. Elasto-plastic finite element earthquake response analyses were carried out. It is shown that the existence of bolted splices may increase seismic demand on the piers when plastic hinge zone is located on the beam. In addition, longer bolted splices using low yield strength steel are proposed to overcome this problem and are shown to give beneficial effects.

  20. Pier Luigi Nervi architetture voltate Verso nuove strutture

    OpenAIRE

    Solomita, Pasqualino

    2012-01-01

    L’ingegner Pier Luigi Nervi (1891-1979), progettista, costruttore e teorico del “Costruire Correttamente”, ha intrapreso un proprio esclusivo percorso professionale che ha decretato negli anni una notevole fortuna critica fino a un sostanziale oblio dopo la sua morte. La presente ricerca di dottorato intende approfondire le tematiche legate a una significativa tipologia strutturale che ha contrassegnato il percorso professionale di Pier Luigi Nervi: le architetture voltate. Cupole, vol...

  1. THE EXPERIMENT OF THE COMPLEX INSPECTION OF THE RAILROAD BRIDGE PIER

    Directory of Open Access Journals (Sweden)

    B. M. Usachenko

    2010-03-01

    Full Text Available The procedure and results of a visual inspection and vibrosonic diagnostics of the railroad bridge pier are described. The spatial model of the pier with an arrangement of large cracks is presented.

  2. Rigid-Plastic Dynamic Response of Reinforced Concrete Bridge Pier Impacted by Automobile

    Institute of Scientific and Technical Information of China (English)

    ZHENG Xiaoning; DIAO Bo; YE Yinghua

    2006-01-01

    Bridge piers are impacted by autos sometimes.The pier usually has not been destroyed after once impact by auto.But there are few research on damage which will affect pier's capability,and most relative studies have focused the problems on piers impacted by vessels.The methods involve mainly sutra experience theory,numerical analysis,and experimental method.Owing to the complicacy of the bridge pier impacted by a vessel,there are few research derived with the sutra mechanics model and the piers impacted by autos.The dynamic response is studied here under the assumption of the rigid-plastic small-deformation for the pier impacted by auto.According to the Parkes beam model,the rigid-plastic theoretical solution is deduced.The final deformation is calculated by a practical example for the pier impacted by auto.

  3. 76 FR 1521 - Security Zone: Fleet Industrial Supply Center Pier, San Diego, CA

    Science.gov (United States)

    2011-01-11

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA87 Security Zone: Fleet Industrial Supply Center Pier, San... of the San Diego Bay, San Diego, CA. The existing security zone is around the former Fleet Industrial... Fleet Industrial Supply Center Pier. The pier is no longer owned by the U.S. Navy and the security zone...

  4. Study of the time-dependent clear water scour around circular bridge piers

    Directory of Open Access Journals (Sweden)

    Aksoy Aysegul Ozgenc

    2017-03-01

    Full Text Available The local scour around bridge piers influences their stabilities and plays a key role in the bridge failures. The estimation of the maximum possible scour depth around bridge piers is an important step in the design of the bridge pier foundations. In this study, the temporal evolution of local scour depths as well as the equilibrium scour depths were analyzed.

  5. 78 FR 32274 - Scorpion Pier Replacement Project, Channel Islands National Park, Santa Barbara County, California

    Science.gov (United States)

    2013-05-29

    ... National Park Service Scorpion Pier Replacement Project, Channel Islands National Park, Santa Barbara... analysis process for the proposed replacement and potential relocation of the existing Scorpion Pier at..., Attn: Scorpion Pier Project, 1901 Spinnaker Drive, Ventura, CA 93001 or electronically to...

  6. 48 CFR 47.303-12 - Ex dock, pier, or warehouse, port of importation.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Ex dock, pier, or... ACQUISITION REGULATION CONTRACT MANAGEMENT TRANSPORTATION Transportation in Supply Contracts 47.303-12 Ex dock, pier, or warehouse, port of importation. (a) Explanation of delivery term. Ex dock, pier, or warehouse...

  7. Pier Paolo Pasolini (1922-1975) / Andres Ehin

    Index Scriptorium Estoniae

    Ehin, Andres, 1940-2011

    2006-01-01

    Itaalia filmilavastajast ja kirjanikust Pier Paolo Pasolinist. Sisaldab ka tema luuletusi "Laul kirikukellast", "Saladus", "Olen rõõmus", "Varastatud päevad", "Tuhat üheksasada nelikümmend neli", "Tuhat üheksasada nelikümmend viis"

  8. 24 CFR 3285.310 - Pier location and spacing.

    Science.gov (United States)

    2010-04-01

    ... and dead loads, the type of construction (single-or multi-section), I-beam size, soil bearing capacity... vertical or horizontal design loads. 5. When a full-height mating wall does not support the ridge beam..., electrical, mechanical, equipment, crawlspaces, or other devices. 3. Single-stack concrete block pier loads...

  9. Centrifuge modeling of rocking-isolated inelastic RC bridge piers

    Science.gov (United States)

    Loli, Marianna; Knappett, Jonathan A; Brown, Michael J; Anastasopoulos, Ioannis; Gazetas, George

    2014-01-01

    Experimental proof is provided of an unconventional seismic design concept, which is based on deliberately underdesigning shallow foundations to promote intense rocking oscillations and thereby to dramatically improve the seismic resilience of structures. Termed rocking isolation, this new seismic design philosophy is investigated through a series of dynamic centrifuge experiments on properly scaled models of a modern reinforced concrete (RC) bridge pier. The experimental method reproduces the nonlinear and inelastic response of both the soil-footing interface and the structure. To this end, a novel scale model RC (1:50 scale) that simulates reasonably well the elastic response and the failure of prototype RC elements is utilized, along with realistic representation of the soil behavior in a geotechnical centrifuge. A variety of seismic ground motions are considered as excitations. They result in consistent demonstrably beneficial performance of the rocking-isolated pier in comparison with the one designed conventionally. Seismic demand is reduced in terms of both inertial load and deck drift. Furthermore, foundation uplifting has a self-centering potential, whereas soil yielding is shown to provide a particularly effective energy dissipation mechanism, exhibiting significant resistance to cumulative damage. Thanks to such mechanisms, the rocking pier survived, with no signs of structural distress, a deleterious sequence of seismic motions that caused collapse of the conventionally designed pier. © 2014 The Authors Earthquake Engineering & Structural Dynamics Published by John Wiley & Sons Ltd. PMID:26300573

  10. Centrifuge modeling of rocking-isolated inelastic RC bridge piers

    OpenAIRE

    Loli, Marianna; Knappett, Jonathan A; Brown, Michael J.; Anastasopoulos, Ioannis; GAZETAS, George

    2014-01-01

    Experimental proof is provided of an unconventional seismic design concept, which is based on deliberately underdesigning shallow foundations to promote intense rocking oscillations and thereby to dramatically improve the seismic resilience of structures. Termed rocking isolation, this new seismic design philosophy is investigated through a series of dynamic centrifuge experiments on properly scaled models of a modern reinforced concrete (RC) bridge pier. The experimental method reproduces th...

  11. Acque, fiumi e paesaggi. riflessioni con Pier Francesco Ghetti

    Directory of Open Access Journals (Sweden)

    Michele Ercolini

    2015-11-01

    Full Text Available The object of the interview with Pier Francesco Ghetti can be so listed: to provide a summary, the much possible complete and updated of motivations and causes of what can be defined the very basic mistake facing, from a cultural and planning point of view, the water, river an landscape. In particular, understanding what has already been done and what can still be done for the defence, the government and the requalification of the system of resources. 

  12. Evaluation of pier-scour measurement methods and pier-scour predictions with observed scour measurements at selected bridge sites in New Hampshire, 1995-98

    Science.gov (United States)

    Boehmler, Erick M.; Olimpio, Joseph R.

    2000-01-01

    In a previous study, 44 of 48 bridge sites examined in New Hampshire were categorized as scour critical. In this study, the U.S. Geological Survey (USGS) evaluated pier-scour measurement methods and predictions at many of these sites. This evaluation included measurement of pier-scour depths at 20 bridge sites using Ground- Penetrating Radar (GPR) surveys. Pier scour was also measured during floods by teams at 5 of these 20 sites. At 4 of the 20 sites, fixed instruments were installed to monitor scour. At only one bridge site investigated by a team was any pier scour measurable during a flood event. A scour depth of 0.7 foot (0.21 m) was measured at a pier in the channel at the State Route 18 bridge over the Connecticut River in Littleton. Measurements made using GPR and (or) fixed instruments indicated pier scour for six sites. The GPR surveys indicated scour along the side of a pier and further upstream from the nose of a pier that was not detected by flood-team measurements at two sites. Most pier-scour equations selected for this examination were reviewed and published in previous scour investigations. Graphical comparison of residual pier-scour depths indicate that the Shen equation yielded pier-scour depth predictions closest to those measured, without underestimating. Measured depths of scour, however, were zero feet for 14 of the 20 sites. For the Blench-Inglis II equation and the Simplified Chinese equation, most differences between measured and predicted scour depths were within 5 feet. These two equations underpredicted scour for one of six sites with measurable scour. The underprediction, however, was within the resolution of the depth measurements. The Simplified Chinese equation is less sensitive than other equations to velocity and depth input variables, and is one of the few empirical equations to integrate the influence of flow competence, or a measure of the maximum streambed particle size that a stream is capable of transporting, in the

  13. A Study on Ductility of Prestressed Concrete Pier Based on Response Surface Methodology

    OpenAIRE

    Wang, H.; Zhang, Y; Qin, S.

    2016-01-01

    The ductility of prestressed concrete pier is studied based on response surface methodology. Referring to the pervious prestressed concrete pier, based on Box-Behnken design, the ductility of 25 prestressed concrete piers is calculated by numerical method. The relationship between longitudinal reinforcement ratio, shear reinforcement ratio, prestressed tendon quantity, concrete compressive strength and ductility factor is gotten. The influence of the longitudinal reinforcement ratio, the shea...

  14. A Numerical Investigation of the Seismic Response of the Aggregate Pier Foundation System

    OpenAIRE

    Girsang, Christian Hariady

    2001-01-01

    The response of an aggregate pier foundation system during seismic loading was investigated. The factors and phenomena governing the performance of the aggregate pier and the improved ground were identified and clarified. The key factors affecting the performance of the aggregate pier include soil density, stiffness modulus, and drainage capacity. The improved ground is influenced by soil stratification, soil properties, pore pressure dissipation, and earthquake time history. Comprehensiv...

  15. Numerical Hybrid Simulation Modeling Verification for a Curved 3-Pier Bridge (Investigation of Combined Actions on Reinforced Concrete Bridge Piers (CABER Project

    Directory of Open Access Journals (Sweden)

    Adel Abdelnaby

    2013-06-01

    Full Text Available Reinforced concrete bridge piers are subjected to complex loading conditions under earthquake ground motions. Bridge geometric irregularities and asymmetries result in combined actions imposed on the piers as a combination of displacements and rotations in all six degrees of freedom at the pier-deck juncture. Existing analytical tools have proven their inadequacy in representing the actual behavior of piers under these combined actions, particularly in their inelastic range. The objective of this investigation is to develop a fundamental understanding of the effects of these combined actions on the performance of RC piers and the resulting system response. This paper describes a part of the CABER project that verifies the numerical hybrid simulation of the curved bridge. In this part two models were introduced, a whole model and a sub-structured hybrid model. The whole model was established using the Zeus-NL analysis platform, which is capable of performing inelastic nonlinear response history analysis of the whole curved bridge. The hybrid model was divided into three modules which comprised the deck, left and right piers, and the middle pier of the bridge. The three modules were modeled by Zeus-NL as a static analysis module interface. The simulation coordinator (SimCor software was utilized to communicate between these modules using a Pseudo-Dynamic time integration scheme. Results obtained from both models were compared and conclusions were drawn.

  16. Pier scour monitoring system by bed-level image tracking

    Institute of Scientific and Technical Information of China (English)

    Wen-Yi CHANG; Jihn-Sung LAI; Teng-Yi YU; Franco LIN; Lung-Cheng LEE; Whey-Fone TSAI; Chin-Hsiung LOH

    2014-01-01

    A scour monitoring system with a micro camera tracking the bed-level images is proposed in this study. Two image recognition algorithms have been developed to support the bed-level image tracking approach. Through the laboratory experiments of pier scour, this study demonstrates that the proposed system is able to accurately monitor the scour-depth evolution in real time. In addition, five commonly-used temporal scour models are employed to simulate scour-depth evolution and their results are compared with monitoring data. In general, the results indicate that the proposed scour monitoring system has the potential for further applications in the field.

  17. Experimental study on the width of the turbulent area around bridge pier

    Institute of Scientific and Technical Information of China (English)

    ZHUANG Yuan; LIU Zu-yuan

    2007-01-01

    At present, the method of calculating the turbulent flow width around the bridge pier is not given in the "Standard for Inland River Navigation" (GB50139-2004) in China, and the bridge designer usually increases the bridge span in order to ensure the navigation safety, which increases both of the structural design difficulty and the project investments. Therefore, it is extremely essential to give a research on the turbulent flow width around the bridge pier. Through the experiments of the fixed bed and the mobile bed, the factors influencing the turbulent flow width around the bridge pier have been analyzed, such as the approaching flow speed, the water depth, the angles between the bridge pier and the flow direction, the sizes of bridge pier, the shapes of the bridge pier, and the scouring around the bridge pier, etc. Through applying the dimension analytic method to the measured data, the formula of calculating the turbulent flow width around the bridge pier is then inferred.

  18. 33 CFR 165.1121 - Security Zone: Fleet Supply Center Industrial Pier, San Diego, CA.

    Science.gov (United States)

    2010-07-01

    ... Guard District § 165.1121 Security Zone: Fleet Supply Center Industrial Pier, San Diego, CA. (a... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Security Zone: Fleet Supply Center Industrial Pier, San Diego, CA. 165.1121 Section 165.1121 Navigation and Navigable Waters COAST...

  19. 77 FR 35862 - Safety Zone; Fleet Week Maritime Festival, Pier 66 Elliott Bay, Seattle, WA

    Science.gov (United States)

    2012-06-15

    ... SECURITY Coast Guard 33 CFR Part 165 Safety Zone; Fleet Week Maritime Festival, Pier 66 Elliott Bay... Guard will enforce the Fleet Week Maritime Festival's Pier 66 Safety Zone in Elliott Bay, WA from 8 a.m... Guard will enforce the Safety Zone for the Fleet Week Maritime Festival in 33 CFR 165.1330 on August...

  20. 77 FR 51475 - Safety Zone; Apache Pier Labor Day Fireworks; Myrtle Beach, SC

    Science.gov (United States)

    2012-08-24

    ... INFORMATION: Table of Acronyms DHS Department of Homeland Security FR Federal Register NPRM Notice of Proposed... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Apache Pier Labor Day Fireworks; Myrtle... establishing a temporary safety zone on the waters of the Atlantic Ocean in the vicinity of Apache Pier...

  1. 48 CFR 52.247-40 - Ex Dock, Pier, or Warehouse, Port of Importation.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 2 2010-10-01 2010-10-01 false Ex Dock, Pier, or... Provisions and Clauses 52.247-40 Ex Dock, Pier, or Warehouse, Port of Importation. As prescribed in 47.303-12(c), insert the following clause in solicitations and contracts when the delivery term is ex dock...

  2. Catastrophic model for stability analysis of high pile-column bridge pier

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    According to the engineering features of higher pile-column bridge pier in mountainous area, a clamped beam mechanical model was set up by synthetically analyzing the higher pile-column bridge pier buckling mechanism. Based on the catastrophe theory, the cusp catastrophe model of higher pile-column bridge pier was established by the determination of its potential function and bifurcation set equation, the necessary instability conditions of high pile-column bridge pier were deduced, and the determination method for column-buckling and lateral displacement of high pile-column bridge pier was derived. The comparison between the experimental and calculated results show that the calculated curves agree with testing curves and the method is reasonable and effective.

  3. A Study on Ductility of Prestressed Concrete Pier Based on Response Surface Methodology

    Directory of Open Access Journals (Sweden)

    H. Wang

    2016-12-01

    Full Text Available The ductility of prestressed concrete pier is studied based on response surface methodology. Referring to the pervious prestressed concrete pier, based on Box-Behnken design, the ductility of 25 prestressed concrete piers is calculated by numerical method. The relationship between longitudinal reinforcement ratio, shear reinforcement ratio, prestressed tendon quantity, concrete compressive strength and ductility factor is gotten. The influence of the longitudinal reinforcement ratio, the shear reinforcement ratio, the prestressed tendon quantity and concrete compressive strength to curvature ductility is discussed. Then the ductility regression equation is deduced. The result showed that the influence of the prestressed tendon quantity to the ductility of prestressed concrete pier is significant. With the increasing of the prestressed tendon quantity, the curvature ductility curved reduces. With the increasing of shear reinforcement ratio and compressive strength of concrete, the curvature ductility increases linearly. And the influence of the longitudinal reinforcement ratio to ductility of the prestressed concrete pier is insignificant.

  4. Mathematical Modeling of Local Scour at Slender and Wide Bridge Piers

    Directory of Open Access Journals (Sweden)

    Youssef I. Hafez

    2016-01-01

    Full Text Available Most existing equations for predicting local scour at bridge piers suffer from overprediction of the scour depths which results in higher foundation costs. To tackle this problem, a mathematical model for predicting bridge pier scour is developed herein based on an energy balance theory. The present study equation was compared to commonly used bridge scour equations using scour field data in USA. The developed equation has several advantages among which we have the following: it adds to the understanding of the physics of bridge pier scour, is valid for slender and wide piers, does not suffer from overprediction of scour depths, addresses clear water and live bed scour, and includes the effects of various characteristics of the bed material such as specific gravity (or density, porosity, size, and angle of repose. In addition, the developed equation accounts for the debris effect and aids in the design of scour mitigation methods such as collars, side bars, slots, and pier protective piles.

  5. The effect of circular bridge piers with different inclination angles toward downstream on scour

    Indian Academy of Sciences (India)

    Mohammad Vaghef; Masoud Ghodsian; Saeid Salimi

    2016-01-01

    A fundamental principle in the safe design of bridge piers is to estimate maximum scour depth. As such, many researchers devoted their efforts to study the phenomenon of scour around bridge piers and to present relationships to estimate maximum scour depth. In the current research, scour around circular bridge piers with two different diameters and different inclination angles toward downstream has been investigated experimentally under clear water and different discharges. The obtained results revealed that increase in the inclination angle leads to a significant decrease in the scour depth, dimensions of sediment ridge and scour hole. Moreover, by comparing the data obtained from vertical bridge pier and well-known relationships, a relationship having the most agreement with the results was selected and modified to estimate equilibrium scour depth around inclined piers.

  6. 78 FR 54574 - Safety Zone; Tall Ships Erie 2013 Fireworks Show, Holland Street Pier, Presque Isle Bay, Erie, PA

    Science.gov (United States)

    2013-09-05

    ..., Holland Street Pier, Presque Isle Bay, Erie, PA AGENCY: Coast Guard, DHS. ACTION: Temporary final rule... of Holland Street Pier, Presque Isle Bay in Erie, PA. The Captain of the Port Buffalo has determined... all waters off Holland Street Pier, Presque Isle Bay, Erie, PA within a 420-foot radius of position...

  7. Study on Repaired Earthquake-Damaged Bridge Piers under Seismic Load

    Directory of Open Access Journals (Sweden)

    Jun Deng

    2015-01-01

    Full Text Available The concrete bridge pier damaged during earthquakes need be repaired to meet the design standards. Steel tube as a traditional material or FRP as a novel material has become popular to repair the damaged reinforced concrete (RC bridge piers. In this paper, experimental and finite element (FE studies are employed to analyze the confinement effectiveness of the different repair materials. The FE method was used to calculate the hysteretic behavior of three predamaged circle RC bridge piers repaired with steel tube, basalt fiber reinforced polymer (BFRP, and carbon fiber reinforced polymer (CFRP, respectively. Meanwhile, the repaired predamaged circle concrete bridge piers were tested by pseudo-static cyclic loading to study the seismic behavior and evaluate the confinement effectiveness of the different repair materials and techniques. The FE analysis and experimental results showed that the repaired piers had similar hysteretic curves with the original specimens and all the three repair techniques can restore the seismic performance of the earthquake-damaged piers. Steel tube jacketing can significantly improve the lateral stiffness and peak load of the damaged pier, while the BFRP and CFRP sheets cannot improve these properties due to their thin thickness.

  8. Reduction of scour around bridge piers using a modified method for vortex reduction

    Directory of Open Access Journals (Sweden)

    Entesar A.S. EL-Ghorab

    2013-09-01

    Full Text Available The current study presents a modified method to reduce the scour depth in front of the bridge piers. The idea of this method is based on reducing the stagnation of the flow and vortex formation in front of the pier. Therefore, the pressure difference around the pier is used for driving the flow through an arrangement of openings in front and connected to the openings along the pier’s side. A test program was planned using an experimental flume at the Hydraulics Research Institute (HRI and three hundred thirty six runs were conducted. Three different pier shapes, circular, square, and rectangular, provided with different openings arrangement and vertical spacing are tested. This method showed that the scour depth is reduced by 45% and also the volume of the scoured material is decreased up to 64%. These results were obtained using opening diameter of 20% of the pier width (w and vertical spacing equals the pier width (w. Also, a dimensionless regression equation was developed based on the obtained results. These findings when implemented in the field can easily safeguard the bridge piers and dramatically reduce the maintenance efforts and costs as well as improve the hydraulic performance of the water structure.

  9. Analysis of Water Flow Pressure on Bridge Piers considering the Impact Effect

    Directory of Open Access Journals (Sweden)

    Yin-hui Wang

    2015-01-01

    Full Text Available In order to investigate the effects of water current impact and fluid-structure interaction on the bridge piers, the mechanism of water flow impact on the bridge pier is firstly studied. Then a finite element model of a bridge pier is established including the effects of water flow impact as well as the water circumferential motion around the pier. Comparative study is conducted between the results of water impact effect, fluid-structure coupling effect, theoretical analysis, and also the results derived using the formulas specified in the design codes home and abroad. The results show that the water flow force calculated using the formulas provided by the codes should be multiplied by an impact amplifier to account for the effect of flood impact on the bridge pier. When the flood flows around the pier, the fluid-structure coupling effect on the bridge pier can be neglected. The method specified in the China guidelines of General Code for Design of Highway Bridges and Culverts tends to provide a larger result of the water flow force.

  10. Experimental Study on a Self-Centering Earthquake-Resistant Masonry Pier with a Structural Concrete Column

    Directory of Open Access Journals (Sweden)

    Lijun Niu

    2017-01-01

    Full Text Available This paper proposes a slotting construction strategy to avoid shear behavior of multistory masonry buildings. The aspect ratio of masonry piers increases via slotting between spandrels and piers, so that the limit state of piers under an earthquake may be altered from shear to rocking. Rocking piers with a structural concrete column (SCC form a self-centering earthquake-resistant system. The in-plane lateral rocking behavior of masonry piers subjected to an axial force is predicted, and an experimental study is conducted on two full-scale masonry piers with an SCC, which consist of a slotting pier and an original pier. Meanwhile, a comparison of the rocking modes of masonry piers with an SCC and without an SCC was conducted in the paper. Experimental verification indicates that the slotting strategy achieves a change of failure modes from shear to rocking, and this resistant system with an SCC incorporates the self-centering and high energy dissipation properties. For the slotting pier, a lateral story drift ratio of 2.5% and a high displacement ductility of approximately 9.7 are obtained in the test, although the lateral strength decreased by 22.3% after slotting. The predicted lateral strength of the rocking pier with an SCC has a margin of error of 5.3%.

  11. Seismic damage analysis of the outlet piers of arch dams using the finite element sub-model method

    Science.gov (United States)

    Song, Liangfeng; Wu, Mingxin; Wang, Jinting; Xu, Yanjie

    2016-09-01

    This study aims to analyze seismic damage of reinforced outlet piers of arch dams by the nonlinear finite element (FE) sub-model method. First, the dam-foundation system is modeled and analyzed, in which the effects of infinite foundation, contraction joints, and nonlinear concrete are taken into account. The detailed structures of the outlet pier are then simulated with a refined FE model in the sub-model analysis. In this way the damage mechanism of the plain (unreinforced) outlet pier is analyzed, and the effects of two reinforcement measures (i.e., post-tensioned anchor cables and reinforcing bar) on the dynamic damage to the outlet pier are investigated comprehensively. Results show that the plain pier is damaged severely by strong earthquakes while implementation of post-tensioned anchor cables strengthens the pier effectively. In addition, radiation damping strongly alleviates seismic damage to the piers.

  12. Pushover analysis of the seismic capacity of reinforced concrete double-column bridge piers

    Directory of Open Access Journals (Sweden)

    WANG Hongwei

    2013-02-01

    Full Text Available This article deacribes the basic principle and implementation steps of the Pushover analysis method.By a numerical example,RC double-column piers with different lateral force distribution pattern,different heights and different reinforcement ratio were analyzed.The results show that the analysis results for lower piers of simple supported beam bridges are approximately identical under different lateral force distribution,while with the increase of pier height and longitudinal ratio of reinforcement,the displacement ductility factor is reduced.

  13. Seismic Behavior of Posttensioned Concrete Bridge Piers with External Viscoelastic Dampers

    Directory of Open Access Journals (Sweden)

    Anxin Guo

    2016-01-01

    Full Text Available This paper investigates the seismic performance of posttensioned concrete piers with external viscoelastic dampers to improve the energy dissipation capacity of this type of structure. An installation scheme for viscoelastic dampers on bridge piers is proposed, and the mechanical models of the damper are analyzed according to the installation scheme. By attaching the viscoelastic dampers to the posttensioned bridge piers, the analytical model of the hybrid system is established using the OpenSees finite element analysis package. Cyclic behavior and time history analyses are conducted on a posttensioned bridge with and without viscoelastic dampers using the established finite element model. The analysis results indicate that the viscoelastic dampers can effectively improve the seismic performance of the bridge structures with posttensioned piers.

  14. Security enhancement of littoral combat ship class utilizing an autonomous mustering and pier monitoring system

    OpenAIRE

    Stubblefield, Philip N.

    2010-01-01

    Approved for public release; distribution is unlimited Littoral Combat Ships (LCS) are designed and built to have minimum crew sizes thus, while the ship is in port, there are fewer crewmembers to facilitate pier monitoring, security, and conducting mustering of personnel. The crew of LCS ships presently have too many responsibilities to ensure 100% coverage of the Pier area 100% of the time, and cannot manually maintain a real time muster of all ships personnel. This lack of coverage a...

  15. Rapid repair of severely earthquake-damaged bridge piers with flexural-shear failure mode

    Science.gov (United States)

    Sun, Zhiguo; Wang, Dongsheng; Du, Xiuli; Si, Bingjun

    2011-12-01

    An experimental study was conducted to investigate the feasibility of a proposed rapid repair technique for severely earthquake-damaged bridge piers with flexural-shear failure mode. Six circular pier specimens were first tested to severe damage in flexural-shear mode and repaired using early-strength concrete with high-fluidity and carbon fiber reinforced polymers (CFRP). After about four days, the repaired specimens were tested to failure again. The seismic behavior of the repaired specimens was evaluated and compared to the original specimens. Test results indicate that the proposed repair technique is highly effective. Both shear strength and lateral displacement of the repaired piers increased when compared to the original specimens, and the failure mechanism of the piers shifted from flexural-shear failure to ductile flexural failure. Finally, a simple design model based on the Seible formulation for post-earthquake repair design was compared to the experimental results. It is concluded that the design equation for bridge pier strengthening before an earthquake could be applicable to seismic repairs after an earthquake if the shear strength contribution of the spiral bars in the repaired piers is disregarded and 1.5 times more FRP sheets is provided.

  16. Simulation of Flow Pattern around Inclined Bridge Group Pier using FLOW-3D Software

    Directory of Open Access Journals (Sweden)

    Malihesadat Jafari

    2017-03-01

    Full Text Available Introduction: Bridges are certainly one of the most important structures but costly service elements in a transport system. The bridges are very required to access the damaged areas in emergency situations such as floods and earthquakes. Scour around the foundations of bridge piers exposed to the flowing water than can destroy the bridge itself is a subject of major concern. Flow pattern is known as responsible for all changes in stream bed. Any obstacle in the channel can form new flow patterns causing additional shear stress exerted on the bed than the equilibrium condition of the absence of the obstacle. Appropriate shaping of flow pattern and proper selecting of pier geometry and the location of bridge piers can be one of the proper methods in reduction of scour amount which is the main subject of the present study. Materials and Methods: Inclined bridge group pier is a type of bridges with modern geometry based on development in building technology of structures. Many of these bridges have been built all around the world and the 8th bridge built crossing the Karun River in Ahvaz is a sample of the Iranian ones considered in this research. Hydrodynamic behavior of flow is investigated around the inclined bridge group pier settled on foundation using the FLOW-3D numerical model. Inclined bridge group pier investigated in this study, includes two rectangular piers which are 2.5 cm long and 3.5 cm wide and set in an angle of 28 degree on rectangular foundation which is 16 cm long and 10 cm wide and installed in three different foundation levels namely at, above and below the bed levels. The physical model of prototype pier considered in this study was constructed to the scale of 1:190 of the Ahvaz 8th bridge. In order to verify the accuracy of the numerical model, velocity data obtained from image processing technique were used. Results and Discussion: Due to non- linearity and interactions between various phenomena involved, flow pattern

  17. Experimental research and finite element analysis of bridge piers failed in flexure-shear modes

    Institute of Scientific and Technical Information of China (English)

    Sun Zhiguo; Si Bingjun; Wang Dongsheng; Guo Xun

    2008-01-01

    In recent earthquakes,a large number of reinforced concrete (RC) bridges were severely damaged due to mixed flexure-shear failure modes of the bridge piers.An integrated experimental and finite element (FE) analysis study is described in this paper to study the seismic performance of the bridge piers that failed in flexure-shear modes.In the first part,a nonlinear cyclic loading test on six RC bridge piers with circular cross sections is carried out experimentally.The damage states,ductility and energy dissipation parameters,stiffness degradation and shear strength of the piers are studied and compared with each other.The experimental results suggest that all the piers exhibit stable flexural response at displacement ductilities up to four before exhibiting brittle shear failure.The ultimate performance of the piers is dominated by shear capacity due to significant shear cracking,and in some cases,rupturing of spiral bars.In the second part,modeling approaches describing the hysteretic behavior of the piers are investigated by using ANSYS software.A set of models with different parameters is selected and evaluated through comparison with experimental results.The influences of the shear retention coefficients between concrete cracks,the Bauschinger effect in longitudinal reinforcement,the bond-slip relationship between the longitudinal reinforcement and the concrete and the concrete failure surface on the simulated hysteretie curves are discussed.Then,a modified analysis model is presented and its accuracy is verified by comparing the simulated results with experimental ones.This research uses models available in commercial FE codes and is intended for researchers and engineers interested in using ANSYS software to predict the hysteretic behavior of reinforced concrete structures.

  18. Experimental research and finite element analysis of bridge piers failed in flexure-shear modes

    Science.gov (United States)

    Sun, Zhiguo; Si, Bingjun; Wang, Dongsheng; Guo, Xun

    2008-12-01

    In recent earthquakes, a large number of reinforced concrete (RC) bridges were severely damaged due to mixed flexure-shear failure modes of the bridge piers. An integrated experimental and finite element (FE) analysis study is described in this paper to study the seismic performance of the bridge piers that failed in flexure-shear modes. In the first part, a nonlinear cyclic loading test on six RC bridge piers with circular cross sections is carried out experimentally. The damage states, ductility and energy dissipation parameters, stiffness degradation and shear strength of the piers are studied and compared with each other. The experimental results suggest that all the piers exhibit stable flexural response at displacement ductilities up to four before exhibiting brittle shear failure. The ultimate performance of the piers is dominated by shear capacity due to significant shear cracking, and in some cases, rupturing of spiral bars. In the second part, modeling approaches describing the hysteretic behavior of the piers are investigated by using ANSYS software. A set of models with different parameters is selected and evaluated through comparison with experimental results. The influences of the shear retention coefficients between concrete cracks, the Bauschinger effect in longitudinal reinforcement, the bond-slip relationship between the longitudinal reinforcement and the concrete and the concrete failure surface on the simulated hysteretic curves are discussed. Then, a modified analysis model is presented and its accuracy is verified by comparing the simulated results with experimental ones. This research uses models available in commercial FE codes and is intended for researchers and engineers interested in using ANSYS software to predict the hysteretic behavior of reinforced concrete structures.

  19. Local-based damage detection of cyclically loaded bridge piers using wireless sensing units

    Science.gov (United States)

    Hou, Tsung-Chin; Lynch, Jerome P.; Parra-Montesinos, Gustavo

    2005-05-01

    Concrete bridge piers are a common structural element employed in the design of bridges and elevated roadways. In order to ensure adequate behavior under earthquake-induced displacements, extensive reinforcement detailing in the form of closely spaced ties or spirals is necessary, leading to congestion problems and difficulties during concrete casting. Further, costly repairs are often necessary in bridge piers after a major earthquake which in some cases involve the total or partial shutdown of the bridge. In order to increase the damage tolerance while relaxing the transverse reinforcement requirements of bridge piers, the use of high-performance fiber reinforced cementitious composites (HPFRCC) in earthquake-resistant bridge piers is explored. HPFRCCs are a relatively new class of cementitious material for civil structures with tensile strain-hardening behavior and high damage tolerance. To monitor the behavior of this new class of material in the field, low-cost wireless monitoring technologies will be adopted to provide HPFRCC structural elements the capability to accurately monitor their performance and health. In particular, the computational core of a wireless sensing unit can be harnessed to screen HPFRCC components for damage in real-time. A seismic damage index initially proposed for flexure dominated reinforced concrete elements is modified to serve as an algorithmic tool for the rapid assessment of damage (due to flexure and shear) in HPFRCC bridge piers subjected to large shear reversals. Traditional and non-traditional sensor strategies of an HPFRCC bridge pier are proposed to optimize the correlation between the proposed damage index model and the damage observed in a circular pier test specimen. Damage index models are shown to be a sufficiently accurate rough measure of the degree of local-area damage that can then be wirelessly communicated to bridge officials.

  20. HYDRAULIC CHARACTERISTICS OF BOTTOM UNDERLAY-TYPE PIER FOR WATER-WING CONTROL

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The pier, placed at the outlet of the pressure flow section, is an effective design to deal with the problems of the manufacture and operation of the gates for a discharge tunnel with high water head. It is crucial to control the water-wing, induced by this type of the pier. Through observing the phenomena of the water-wing, the reason of the water-wing inception, i.e., the concave of the flow surface, was presented, and a type of the new pier with bottom underlay was designed. The hydraulic characteristics of the pier, including the variations of the water-wing features, both length and height, with the water head, as well as with the concave depth, and with the height of the bottom underlay, and the variations of the concave depth with the height of the bottom underlay, were investigated by physical model experiments. The results show that the approach of the modification of the concave through the structures with the bottom underlay-type pier is remarkably effective in the water-wing control.

  1. Analytical Methods for Temperature Field and Temperature Stress of Column Pier under Solar Radiation

    Directory of Open Access Journals (Sweden)

    Yin-hui Wang

    2015-01-01

    Full Text Available Based on the previous research work, a new idea is proposed for analyzing the impact of solar radiation on the substructure of bridges. Investigation is conducted in the thermodynamic phenomena and temperature stress of a dual-column pier. Research is led to the thermal conductivity of concrete structure and the values of the environmental parameters under solar radiation. An analytical code is written for the thermal analysis of the dual-column pier using the parametric modeling function of FE software, by means of which the temperature distribution of the bridge structure is computed under solar radiation. Using the thermal analytical results, the temperature stress of the dual-column pier is further calculated. The results tell that the temperature gradient distribution curve inside the concrete of the pier fits favorably the curve defined in the design specification and coincides quite well with real situation, which verifies the new idea proposed in this paper. Under the solar radiation which is a time-variable nonlinear temperature load to the bridge, the maximum principal stress is found at the corner of the pier with the sign of negative, which is believed to threaten the safety of the substructure of bridge and is necessary to arouse emphasis.

  2. Cyclic Load Responses of GFRP-Strengthened Hollow Rectangular Bridge Piers

    Directory of Open Access Journals (Sweden)

    Junfeng Jia

    2014-01-01

    Full Text Available This study investigated the seismic behavior of glass fiber reinforced polymer (GFRP strengthened hollow rectangular bridge piers. Cyclic testing of reinforced concrete (RC piers retrofitted with GFRP was carried out under constant axial loading and lateral bending. The failure characteristics, flexural ductility, dissipated energy, and hysteretic behaviors, were analyzed based on experimental results. A simplified GFRP-confined concrete model is developed by considering effective strength coefficient and area distribution ratio of GFRP sheets. The results indicate that the failure modes and damage region would be changed and the ductility and dissipated energy of the GFRP-strengthened hollow rectangular bridge piers were improved greatly but not much improvement for the lateral load capacity. The analytical results of the force-displacement hysteretic loops based on the GFRP-confined concrete model developed in this paper agreed well with the experimental data.

  3. Realistic modelling of the effects of asynchronous motion at the base of bridge piers

    CERN Document Server

    Romanelli, F; Vaccari, F

    2002-01-01

    Frequently long-span bridges provide deep valley crossings, which require special consideration due to the possibility of local amplification of the ground motion as a consequence of topographical irregularities and local soil conditions. This does in fact cause locally enhanced seismic input with the possibility for the bridge piers to respond asynchronously. This introduces special design requirements so that possible out-of-phase ground displacements and the associated large relative displacements of adjacent piers can be accommodated without excessive damage. Assessment of the local variability of the ground motion due to local lateral heterogeneities and to attenuation properties is thus crucial toward the realistic definition of the asynchronous motion at the base of the bridge piers. We illustrate the work done in the framework of a large international cooperation to assess the importance of non-synchronous seismic excitation of long structures. To accomplish this task we compute complete synthetic acc...

  4. Multi-objective optimization design of bridge piers with hybrid heuristic algorithms

    Institute of Scientific and Technical Information of China (English)

    Francisco J. MARTINEZ-MARTIN; Femando GONZALEZ-VIDOSA; Antonio HOSPITALER; Victor YEPES

    2012-01-01

    This paper describes one approach to the design of reinforced concrete (RC) bridge piers,using a three-hybrid multiobjective simulated annealing (SA) algorithm with a neighborhood move based on the mutation operator from the genetic algorithms (GAs),namely MOSAMO1,MOSAMO2 and MOSAMO3.The procedure is applied to three objective functions:the economic cost,the reinforcing steel congestion and the embedded CO2 emissions.Additional results for a random walk and a descent local search multi-objective algorithm are presented.The evaluation of solutions follows the Spanish Code for structural concrete.The methodology was applied to a typical bridge pier of 23,97 m in height.This example involved 110 design variables.Results indicate that algorithm MOSAMO2 outperforms other algorithms regarding the definition of Pareto fronts.Further,the proposed procedure will help structural engineers to enhance their bridge pier designs.

  5. Local sediment scour model tests for the Woodrow Wilson Bridge piers

    Science.gov (United States)

    Sheppard, D.M.; Jones, J.S.; Odeh, M.; Glasser, T.

    2004-01-01

    The Woodrow Wilson Bridge on I-495 over the Potomac River in Prince Georges County, Maryland is being replaced. Physical local scour model studies for the proposed piers for the new bridge were performed in order to help establish design scour depths. Tests were conducted in two different flumes, one in the USGS-BRD Conte Research Center in Turners Falls, Massachusetts and one in the FHWA Turner Fairbanks Laboratory in McLean, Virginia. Due to space limitations in this publication only the tests conducted in the USGS flume are presented in this paper. Two different pier designs were tested. One of the piers was also tested with two different diameter dolphin systems. Copyright ASCE 2004.

  6. Remediation of Centre Pier, Port Hope, Ontario: Historical, Logistical, Regulatory and Technical Challenges - 13118

    Energy Technology Data Exchange (ETDEWEB)

    Ferguson Jones, Andrea [MMM Group Limited, 100 Commerce Valley Drive West, Thornhill, Ontario, L3T 0A1 (Canada); Case, Glenn [Atomic Energy of Canada Limited, 115 Toronto Road, Port Hope, Ontario, L1A 3S4 (Canada); Lawrence, Dave [Public Works and Government Services Canada, 115 Toronto Road, Port Hope, Ontario, L1A 3S4 (Canada)

    2013-07-01

    Centre Pier is a 3.9 ha property owned by the Commissioners of the Port Hope Harbour in the Municipality of Port Hope, Ontario, Canada. It is centrally located on the Port Hope waterfront and is bounded on the west by the Port Hope Harbour, on the east by the Ganaraska River, on the south by Lake Ontario, and on the north by a railway corridor. The property is currently leased by the Commissioners of the Port Hope Harbour to the Cameco Corporation which owns the four onsite building that are used as warehouse space for their uranium conversion facility located on the western side of the Harbour. Remediation of this site forms part of the Port Hope Project being undertaken by Atomic Energy of Canada Limited (AECL) and Public Works and Government Services Canada (PWGSC) as part of the Port Hope Area Initiative (PHAI). Soil impacts include radiological, metals and petroleum hydrocarbons resulting from long term historical industrial use. Radiological impacts in soil extend across most of the site primarily within the upper metre of fill. Metals-contaminated soil is present across the entire site in the underlying fill material. The metals-contaminated fill extends to a maximum depth of 2.0 m below grade at the north end of the site which is underlain by peat. However, the metals-contaminated soil could extend to the top of the bedrock on the remainder of the site. Based on the elevation of the bedrock in the adjacent river and Harbour Basin, the metals-contaminated soil may extend to a depth of 5.6 m or 6.5 m below existing grade. Petroleum-contaminated soil is present on the southeast side of the site, where a storage tank farm was previously located. Challenges include: - The complex history of the site both relating to site use and Pier construction. Pier development began in the 1800's and was undertaken by many different entities. Modifications and repairs were made over the years resulting in several different types of Pier walls and fill that must be

  7. Numerical Analysis of Interaction Between Pile-Supported Pier and Bank Slope

    Institute of Scientific and Technical Information of China (English)

    王年香

    2001-01-01

    Two- and three-dimensional finite element analysis programs for pile-soil interaction are compiled. Duncan-Chang's Model is used. The construction sequence of the pier is modeled. The pile-soil interface element is used. The influence of the combination type of piles on the deformation of bank slope and pile behaviour is analyzed. Different designs of a pile-supported pier are compared thoroughly. Calculation results show that the stresses and displacements of the pile are directly related to the distance from the bank slope and the direction of inclination. An inclined prop pile set in the rear platform would remarkably reduce the stresses of piles and the displacement of the pier.

  8. 18 CFR 1304.206 - Requirements for community docks, piers, boathouses, or other water-use facilities.

    Science.gov (United States)

    2010-04-01

    ... 18 Conservation of Power and Water Resources 2 2010-04-01 2010-04-01 false Requirements for community docks, piers, boathouses, or other water-use facilities. 1304.206 Section 1304.206 Conservation of....206 Requirements for community docks, piers, boathouses, or other water-use facilities. (a)...

  9. 78 FR 20623 - Environmental Impact Statement for Modernization and Repair of Piers 2 and 3, Military Ocean...

    Science.gov (United States)

    2013-04-05

    ... and 3 are used to transport military supplies in the Pacific region. There may be significant impacts... Department of the Army Environmental Impact Statement for Modernization and Repair of Piers 2 and 3, Military...-needed modernization and repairs of Piers 2 and 3, Military Ocean Terminal Concord (MOTCO) due...

  10. Construction technology on pile foundation of No. 6 main pier in Dashengguan Yangtze Bridge

    Institute of Scientific and Technical Information of China (English)

    Hongbin YU; Zeping LIAN

    2009-01-01

    Based on pile foundation construction of No. 6 main pier, deep mudstone geological foundation and deep-water construction in Nanjing-Dashengguan Yangtze Bridge, the method of super-large-diameter bored pile in deep water is studied. The spread drill, application of PHP mud, and choice of machine are solved by adopting two machines of KTY4000 and KPG300A. Besides, the airlift reversing circulation is selected in slag discharge. The results show that this method can ensure successfully the construction of pier foundation to satisfy the demands of codes.

  11. LARGE-EDDY SIMULATION OF THREE-DIMENSIONAL TURBULENT FLOW AROUND A CIRCULAR PIER

    Institute of Scientific and Technical Information of China (English)

    ZHAO Wei; Huhe Aode

    2006-01-01

    In this article, the turbulent flow field and the scouring mechanism around a circular pier were numerically investigated using the Large Eddy Simulation (LES) method for three scouring holes. The effects of the bottom topographies on the flow structure were studied in detail. The results show that at the downstream of the pier, as the scouring depth increases, the bed shear stress decreases and approaches to the undisturbed shear stress, however, the turbulent intensity, the fluctuating pressure, and the vertical pressure gradient increase gradually.

  12. Determine of velocity field with PIV and CFD during the flow around of bridge piers

    Directory of Open Access Journals (Sweden)

    Picka D.

    2013-04-01

    Full Text Available The article describes the processing of specific junior research FAST-J-11-51/1456 which dealt with physical and CFD of the velocity field during the flow around of bridge piers. Physical modelling has been carried out in Laboratory of water management research in Institute of Water Structures in Brno University of Technology – Faculty of Civil Engineering. To measure of the velocity field in profile of bridge piers were used laser measuring method PIV (Particle Image Velocimetry. The results of PIV served as a basis for comparing experimental data with CFD results of this type of flow in the commercial software ANSYS CFX.

  13. EXPERIMENTAL STUDY ON CAVITATION AND WATER-WING FOR MIDDLE-PIERS OF DISCHARGE TUNNELS

    Institute of Scientific and Technical Information of China (English)

    WU Jian-hua; CAI Chang-guang; JI Wei; RUAN Shi-ping; LUO Chao

    2005-01-01

    In construction of high dams, design of a middle-pier, placed in a discharge tunnel to divide it into two parts, is a better choice that could breakthrough the limits of the manufacture and operation of the gate due to the high head to it. However, cavitation and water-wing, a kind of flow striking the top and side walls of the tunnel, induced by the middle-pier, may take place and bring about bad effects on operation of the tunnel. The experiments of the six comparing plans were conducted, consisting of atmospheric and vacuum tank models, and the interesting areas included relationships between discharges and reservoir levels, measurements of side wall pressures, comparisons of water-wing states for the various middle-piers, estimations of the incipient cavitation numbers and the flow cavitation numbers, and analyses of cavitation characteristics for the tunnel. A kind of new bodily form of middle-pier was developed. Water-wing states were better improved and non-cavitation conditions were satisfied.

  14. 75 FR 8563 - Safety Zone; Fleet Week Maritime Festival, Pier 66, Elliott Bay, Seattle, WA

    Science.gov (United States)

    2010-02-25

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Fleet Week Maritime Festival, Pier 66... aerial spectator events associated with the annual Fleet Week Maritime Festival. Entry into, transit... indicated under the FOR FURTHER INFORMATION CONTACT section of this notice. Background and Purpose The U.S...

  15. Effect of downward seepage on turbulent flow characteristics and bed morphology around bridge piers

    Science.gov (United States)

    Chavan, Rutuja; Sharma, Anurag; Kumar, Bimlesh

    2017-03-01

    In this work, experimental investigations have been pursued to analyse the influence of downward seepage on the turbulent characteristics of flow and corresponding changes in vortex structure around circular bridge pier in alluvial channel. Experiments were conducted in sand bed channel with circular piers of different sizes for no seepage, 10% seepage and 20% seepage cases. The measurement of turbulent flow statistics such as velocity and Reynolds stresses is found to be negative within the scour hole at upstream of the pier whereas application of downward seepage retards the reversal of the flow causing a decrement in the velocity and Reynolds stresses. Higher Reynolds shear stress prevails at the downstream side because of the production of wake vortices. Contribution of all bursting events to the total Reynolds shear stress production has been observed to increase with downward seepage. The analysis of integral scale suggest that size of eddies increases with seepage, which is responsible for increase in particle mobility. Initially rate of scouring is more which abatements gradually with expanding time as well as with the increased of downward seepage. Presence of downward seepage reduces the depth and length of vortex and shifts towards downstream side of the pier.

  16. Effects of bridge piers on a tropical estuary in Goa, India

    Digital Repository Service at National Institute of Oceanography (India)

    Pathak, M.C.; Kotnala, K.L.; Prabaharan, N.

    . These types of changes can cause problems in river navigation. The results obtained may be useful for planning and designing of new bridge piers especially in view of the fact that the river is constantly used for barge transportation of iron ore...

  17. 24 CFR 3285.306 - Design procedures for concrete block piers.

    Science.gov (United States)

    2010-04-01

    ... piers less than 36 inches high are permitted to be constructed of single, open, or closed-cell concrete... shown in Figure A to this section. (3) The concrete blocks must be stacked with their hollow cells... 24 Housing and Urban Development 5 2010-04-01 2010-04-01 false Design procedures for...

  18. Sea surface temperature variability at the Scripps Institution of Oceanography Pier

    DEFF Research Database (Denmark)

    Checkley, David M.; Lindegren, Martin

    2014-01-01

    Sea surface temperature (SST) has been measured from near the end of the SIO pier daily since 1916. It is one of the world’s longest instrumental time series of SST. It is widely used in studies of climate and marine ecosystems and in fisheries management. We hypothesized that a discontinuity exi...

  19. High Performance Building Facade Solutions - PIER Final Project Report

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Eleanor; Selkowitz, Stephen

    2009-12-31

    Building facades directly influence heating and cooling loads and indirectly influence lighting loads when daylighting is considered, and are therefore a major determinant of annual energy use and peak electric demand. Facades also significantly influence occupant comfort and satisfaction, making the design optimization challenge more complex than many other building systems.This work focused on addressing significant near-term opportunities to reduce energy use in California commercial building stock by a) targeting voluntary, design-based opportunities derived from the use of better design guidelines and tools, and b) developing and deploying more efficient glazings, shading systems, daylighting systems, facade systems and integrated controls. This two-year project, supported by the California Energy Commission PIER program and the US Department of Energy, initiated a collaborative effort between The Lawrence Berkeley National Laboratory (LBNL) and major stakeholders in the facades industry to develop, evaluate, and accelerate market deployment of emerging, high-performance, integrated facade solutions. The LBNL Windows Testbed Facility acted as the primary catalyst and mediator on both sides of the building industry supply-user business transaction by a) aiding component suppliers to create and optimize cost effective, integrated systems that work, and b) demonstrating and verifying to the owner, designer, and specifier community that these integrated systems reliably deliver required energy performance. An industry consortium was initiated amongst approximately seventy disparate stakeholders, who unlike the HVAC or lighting industry, has no single representative, multi-disciplinary body or organized means of communicating and collaborating. The consortium provided guidance on the project and more importantly, began to mutually work out and agree on the goals, criteria, and pathways needed to attain the ambitious net zero energy goals defined by California and

  20. A study on ship impacting a flexible crashworthy device for protecting bridge pier

    Directory of Open Access Journals (Sweden)

    Yang Liming

    2015-01-01

    Full Text Available As the accident of a vessel impacting a bridge pier will cause serious disaster, such as destroyed bridge, sinking ship and polluting environment, the technology and method to protect bridge pier from ship collision have been widely investigated recently. Due to the huge kinetic energy of large-tonnage ship and the short time duration in the collision, the studies involve impact mechanics. A developed flexible crashworthy device has been developed to protect bridges, which consists of an outer steel-periphery, an inner steel-periphery and the rubber coating SWRCs(soft elements installed between them. When the SWRC crashworthy device is installed, the collision duration under low impact force is prolonged due to its high compliance, which results in the ship having enough time to turn its navigation direction and most of the remainder kinetic energy being carried off by the turned away ship. Consequently, both impact forces on the ship and on the bridge pier decrease markedly. This is the key reason as to why the SWRC crashworthy device can avoid the destruction of both the bridge and the ship. Based on our results of theoretical studies and numerical simulations, the present paper will propose an experiment-adopted a real ship to impact a flexible crashworthy device. The collision test has been performed 12 times with different speed, carrying capacity, and impact angle of the ship. After the experiments, the ship, flexible crashworthy device and the pier are not damaged. The experiments show that the flexible crashworthy device can turn away the impact ship, so that the ship moves along the outer part of the device, which reduces the ship impact force on the bridge pier obviously. It not only protects bridges but also avoids the damage to ships.

  1. Experimental and Numerical Study on Modal Dynamic Response of Water-Surrounded Slender Bridge Pier with Pile Foundation

    National Research Council Canada - National Science Library

    Yulin Deng; Qingkang Guo; Lueqin Xu

    2017-01-01

      This paper presents an experimental program performed to study the effect of fluid-structure interaction on the modal dynamic response of water-surrounded slender bridge pier with pile foundation...

  2. Docks and Piers, Published in 2008, 1:1200 (1in=100ft) scale, Brown County, WI.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Docks and Piers dataset, published at 1:1200 (1in=100ft) scale, was produced all or in part from Orthoimagery information as of 2008. Data by this publisher...

  3. Apparent Sea Level Rise due to Loading of the Atlantic City Pier by Spectators Viewing (1929-1978) Diving Horses

    Science.gov (United States)

    Galvin, C.

    2012-12-01

    Cyril Galvin, Coastal Engineer Springfield, Virginia 22150 USA Since 1911, the Steel Pier at Atlantic City, New Jersey, has been the site of the Atlantic City tide gauge, except for two intervals: 1911-1921 when the gauge was at the Million Dollar Pier in Atlantic City, and 1985-1991 when the gauge was at the Ventnor Fishing Pier (see Table 2, Zervos, 2009). By design, the Steel Pier was an amusement pier, and its most famous amusement was the Diving Horses: they dove bareback with a woman rider from a platform about 40 feet above sea level. They did that between 1929 and 1978, except for seven years - a post-war period, 1945 to 1953, when diving was suspended. The popularity of the diving horses is recorded on photos of crowds which occupied the bleachers at the seaward end of the pier to view the diving horses. By my count, the crowd pictured in the end papers of the book by Steve Liebowitz (2009) was about 4000 people. Typically, there were multiple shows daily. The weight of the crowd, estimated from the count of the crowd, was about 150 tons. This weight was loaded down on the piles by the crowd of spectators, and unloaded between shows of the diving horses. Most of the piles supporting the pier deck were imbedded in sand newly deposited since 1850. Using Atlantic City sea levels from the PSMSL data base and historical facts from Liebowitz (2009), and beginning with a 1912 start of the tide gauge, the apparent sea level rose at a rate of 3.1mm/yr until 1929 when the horses began diving. With the 1929 start of diving, the apparent sea level rise tripled, averaging 9.4 mm/yr until the act was suspended in 1945. In the 1945-1953 interval, when the horses did not dive (no crowds on the pier), apparent sea level fell (sea level FELL) at a rate of -1.6 mm/yr. The horses resumed diving in 1953, when the apparent sea level resumed at a rate of 4.0mm/yr. This 4.0 mm/yr is identical to the longtime sea level trend (1911-2006) from Zervos (2009) of 3.99mm/yr The history

  4. HYDRAULIC CHARACTERISTICS OF WATER-WINGS FOR THE MIDDLE-PIER OF A DISCHARGE TUNNEL

    Institute of Scientific and Technical Information of China (English)

    WU Jian-hua; CAI Chang-guang; JI Wei; RUAN Shi-ping

    2006-01-01

    Water-wings, induced by the middle-pier placed in the inlet of a discharge tunnel, have harmful effects on the operation of the discharge tunnel.Based on dimensional analysis and physical model tests, the hydraulic characteristics of water-wings were investigated and their causes were analyzed in this study.The results show that the height and length of the water-wings increased with the increase of three factors, i.e., the Froude number Frd of the outlet of the pressure section, the depth Hc of the water surface concave at the end of the middle-pier, and the impact length Li of the two flows after this end.

  5. Seismic Behavior and Force-Displacement Characterization of Neotype Column-Slab High Piers

    Directory of Open Access Journals (Sweden)

    YanQun Zhou

    2014-01-01

    Full Text Available The seismic behavior and plasticity spreading of a neotype column-slab high pier are researched in this paper. Four scale model tests of a web slab with two boundary columns are carried out under cyclic inelastic lateral displacements simulating seismic response. The test results show that the neotype column-slab high pier has strong and stable bearing capacity, good ductility, and energy dissipation capacity. The experimental values pertaining to the spread of plasticity are derived. An approach for deriving the spread of plasticity analytically is deduced and applied to the four tests. This method accurately assesses a pier’s spread of plasticity for most ductility levels. At nearly all ductility levels, the mean difference between analytical assessments of the spread of plasticity and results from 4 large-scale tests is 12% with a 9% coefficient of variation.

  6. RELATIONSHIP OF FIRST STEP HEIGHT, STEP SLOPE AND CAVITY IN X-SHAPED FLARING GATE PIERS

    Institute of Scientific and Technical Information of China (English)

    WANG Bo; WU Chao; HU Yao-hua; MO Zheng-yu

    2007-01-01

    The energy dissipation of X-shaped flaring gate piers ahead of a stepped spillway was adopted in the Suofengying Hydroplant. Under the circumstance that the first step is higher than others, at the step surface an aerated cavity occured behind piers. The interaction of the weir head, the elevation difference between crest and chamber outlet, the first step height, the slopes of weir end and step, and the size of cavity, was investigated, the expression was derived to characterize their relationship, and the corresponding curves were plotted. The comparison of the calculated and simulated results with the measured data was performed. When the slopes of step and weir end are equivalent, the relative height difference between the first and second steps becomes the main factor influencing the aerated cavity. These findings may be useful in practical applications.

  7. Silicone-modified graphene oxide fillers via the Piers-Rubinsztajn reaction

    DEFF Research Database (Denmark)

    Zhang, Jianfeng; Liang, Shuai; Yu, Liyun

    2016-01-01

    While graphene or graphene oxide can make significantimprovements in the properties of a wide variety of polymericmaterials, their incorporation can be challenged byincompatibility with the polymeric matrix. The modification ofgraphene oxide with silicones or silanes using the Piers......-Rubinsztajn reaction improves dispersibility in nonpolar materials,including organic solvents and silicone pre-elastomers. Ahigh loading (up to 10 wt %) of modified graphene oxide insilicone elastomers could be achieved, which resulted inenhanced mechanical performance and reduced gas permeability....

  8. Pier and contraction scour prediction in cohesive soils at selected bridges in Illinois

    Science.gov (United States)

    Straub, Timothy D.; Over, Thomas M.

    2010-01-01

    This report presents the results of testing the Scour Rate In Cohesive Soils-Erosion Function Apparatus (SRICOS-EFA) method for estimating scour depth of cohesive soils at 15 bridges in Illinois. The SRICOS-EFA method for complex pier and contraction scour in cohesive soils has two primary components. The first component includes the calculation of the maximum contraction and pier scour (Zmax). The second component is an integrated approach that considers a time factor, soil properties, and continued interaction between the contraction and pier scour (SRICOS runs). The SRICOS-EFA results were compared to scour prediction results for non-cohesive soils based on Hydraulic Engineering Circular No. 18 (HEC-18). On average, the HEC-18 method predicted higher scour depths than the SRICOS-EFA method. A reduction factor was determined for each HEC-18 result to make it match the maximum of three types of SRICOS run results. The unconfined compressive strength (Qu) for the soil was then matched with the reduction factor and the results were ranked in order of increasing Qu. Reduction factors were then grouped by Qu and applied to each bridge site and soil. These results, and comparison with the SRICOS Zmax calculation, show that less than half of the reduction-factor method values were the lowest estimate of scour; whereas, the Zmax method values were the lowest estimate for over half. A tiered approach to predicting pier and contraction scour was developed. There are four levels to this approach numbered in order of complexity, with the fourth level being a full SRICOS-EFA analysis. Levels 1 and 2 involve the reduction factors and Zmax calculation, and can be completed without EFA data. Level 3 requires some surrogate EFA data. Levels 3 and 4 require streamflow for input into SRICOS. Estimation techniques for both EFA surrogate data and streamflow data were developed.

  9. The Multimedia Piers-Harris Children's Self-Concept Scale 2: Its Psychometric Properties, Equivalence with the Paper-and-Pencil Version, and Respondent Preferences.

    Science.gov (United States)

    Flahive, Mon-hsin Wang; Chuang, Ying-Chih; Li, Chien-Mo

    2015-01-01

    A multimedia version of Piers-Harris Children's Self-Concept Scale 2 (Piers-Harris 2) was created with audio and cartoon animation to facilitate the measurement of self-concept among younger children. This study aimed to assess the psychometric qualities of the computer version of Piers-Harris 2 scores, examine its score equivalence with the paper-and-pencil version, and survey the respondent preference of the two versions. Two hundred and forty eight Taiwanese students from the first to fourth grade were recruited. In regard to the psychometric properties, high internal consistency (α = .91) was found for the total score of multimedia Piers-Harris 2. High interscale correlations (.77 to .83) of the multimedia Piers-Harris 2 scores and the results of confirmatory factor analysis suggested the multimedia Piers-Harris 2 contained good structural characteristics. The scores of the multimedia Piers-Harris 2 also had significant correlations with the scores of the Elementary School Children's Self Concept Scale. The equality of convergence and criterion-related validities of Piers-Harris 2 scores for the multimedia and paper-and-pencil versions and the results of ICCs between the scores of the multimedia and paper-and-pencil Piers-Harris 2 suggested their high level of equivalence. Participants showed more positive attitudes towards the multimedia version.

  10. The Multimedia Piers-Harris Children's Self-Concept Scale 2: Its Psychometric Properties, Equivalence with the Paper-and-Pencil Version, and Respondent Preferences.

    Directory of Open Access Journals (Sweden)

    Mon-hsin Wang Flahive

    Full Text Available A multimedia version of Piers-Harris Children's Self-Concept Scale 2 (Piers-Harris 2 was created with audio and cartoon animation to facilitate the measurement of self-concept among younger children. This study aimed to assess the psychometric qualities of the computer version of Piers-Harris 2 scores, examine its score equivalence with the paper-and-pencil version, and survey the respondent preference of the two versions. Two hundred and forty eight Taiwanese students from the first to fourth grade were recruited. In regard to the psychometric properties, high internal consistency (α = .91 was found for the total score of multimedia Piers-Harris 2. High interscale correlations (.77 to .83 of the multimedia Piers-Harris 2 scores and the results of confirmatory factor analysis suggested the multimedia Piers-Harris 2 contained good structural characteristics. The scores of the multimedia Piers-Harris 2 also had significant correlations with the scores of the Elementary School Children's Self Concept Scale. The equality of convergence and criterion-related validities of Piers-Harris 2 scores for the multimedia and paper-and-pencil versions and the results of ICCs between the scores of the multimedia and paper-and-pencil Piers-Harris 2 suggested their high level of equivalence. Participants showed more positive attitudes towards the multimedia version.

  11. Il Decameron de Pier Paolo Pasolini: da prosa medieval ao roteiro cinematográfico Il Decameron by Pier Paolo Pasolini: from the medieval prose to the screenplay

    Directory of Open Access Journals (Sweden)

    Paula Regina Siega

    2012-12-01

    Full Text Available Este artigo situa-se no campo das teorias da recepção e trabalha com o conceito de "leitura como ato criativo", desenvolvido por Hans Robert Jauss e Wolfgang Iser. Interpretando o roteiro como estrutura textual produtora de imagens literárias, elegemos como objeto de estudo o texto Il Decameron, escrito por Pier Paolo Pasolini com base na obra de Giovanni Boccaccio. Na análise, investigamos os efeitos poéticos produzidos pela releitura do texto medieval, indicando as transformações que o realismo boccacciano assume na linguagem de Pasolini. Para tanto, evidenciamos a importância que as realidades do sexo e da morte adquirem no roteiro, observando como o autor conjuga estes temas às reflexões que faz sobre a própria contemporaneidade.Questo articolo è situato nel campo delle teorie della ricezione e lavora con il concetto di "lettura come atto creativo", sviluppato da Hans Robert Jauss e Wolfgang Iser. Nell'interpretare la sceneggiatura come struttura testuale produttrice di immagini letterarie, scegliamo come oggetto di studio il testo Il Decameron, scritto da Pier Paolo Pasolini basato sull'opera di Giovanni Boccaccio. Nell'analisi, investighiamo gli effetti poetici prodotti dalla rilettura del testo medioevale indicando le trasformazioni che il realismo boccacciano assume nel linguaggio di Pasolini. Pertanto, evidenziamo l'importanza che le realtà del sesso e della morte acquisiscono nella sceneggiatura, osservando come l'autore concilia questi temi con le riflessioni che fa sulla propria contemporaneità.This article is situated in the field of the reception theories and works with the concept of "reading as creative act", developed by Hans Robert Jauss and Wolfgang Iser. Seeing in the screenplay a textual structure that produces literary images, we choose as our object the text Il Decameron, written by Pier Paolo Pasolini based on Boccaccio's work. In the analysis, we investigate the poetic effects produced by the rereading of

  12. 串列双桥墩紊流特性研究%Research of tandem double bridge pier turbulence characteristics

    Institute of Scientific and Technical Information of China (English)

    2016-01-01

    Using the combination of generalized flume experiment and mathematical model test methods,a two-dimensional generalized model of water and bridge is established, through the study of the trace,trailing vortex intensity and shedding frequency,analyzing the pier spacing influence of turbulent flow characteristics around pier.The research has shown that:when tandem double bridge pier spacing smaller (L/D ≤ 2.0),the upstream bridge has no vortex shedding,the upstream bridge pier shear layer alternate adhere to the downstream piers,causing shear layer thickened before exercise,reducing trail vortex shed-ding frequency,the turbulence intensity increases.When 3.0 ≤L/D < 5.0,upstream and downstream bridge piers both have vortex shedding,and as bridge pier spacing bigger,vor-tex shedding phenomenon more obvious,the trailing vortex of the turbulence intensity re-duce along with the increase of spacing.After the bridge pier spacing increases to 5.0,up-stream and downstream turbulence of trailing vortex and trailing vortex shedding are similar to single bridge pier.%采用概化水槽试验和数值模拟相结合的方法,建立了水流与桥墩的二维概化水槽模型.通过对迹线、尾涡强度及脱落频率的研究,分析了桥墩间距对桥墩周围紊流特性的影响.研究结果表明,串列双桥墩间距较小(L/D≤2.0)时,上游桥墩没有形成涡的脱落,上游桥墩的剪切层交替的附着在下游桥墩上,导致剪切层在运动之前变厚,尾涡脱落频率减小,紊动强度增大;当3.0≤L/D<5.0时,上、下游桥墩均有涡的脱落,且桥墩间距越大涡脱落现象越明显,尾涡的紊动强度随间距的增大而减小;当桥墩间距增大到5.0后,上、下游尾涡的紊动及尾涡脱落类似单个桥墩.

  13. Destrutturare le maiuscole. Pensiero debole, Italian Theory e politica. Conversazione con Pier Aldo Rovatti

    Directory of Open Access Journals (Sweden)

    Pier Aldo Rovatti

    2014-06-01

    Full Text Available The conversation focuses on the social and political role of the philosopher nowadays. Pier Aldo Rovatti discusses about the growing philosophical movement called “Italian Theory” while revisiting his own recent intellectual path. The italian philosopher retraces the cultural experience of the “pensiero debole”, whereof he has been one of the two promoters, and underlines the intellectual and political fight, against all the so-called universal truths (and ideological violences, inspired by this philosophical trend at the beginning of the Eighties. The interview ends with a discussion about the dawning perspectives of the political-philosophical action in the post-modern age.

  14. Observations for a profile of Pier Silverio Leicht as a medievalist

    Directory of Open Access Journals (Sweden)

    Enrico Artifoni

    2015-05-01

    Full Text Available This article offers some reflections about Pier Silverio Leicht’s position in the context of medieval italian studies. Leicht (1874-1956 belonged to the great generation of historians and law historians born in the Seventies of 19th century, but he maintained a specific profile as an historian of legal institutions. Two aspects are particularly investigated: 1 The thought of Leicht on relationship between Germanic legal traditions and Roman law; 2 His contributions on feudalism, Communes and guilds, which are significantly distant from those of Gioacchino Volpe.

  15. Il gaucho e la vergineBorges, Pier Damiani e i passati contingenti

    Directory of Open Access Journals (Sweden)

    Marco Rossini

    2008-07-01

    Full Text Available La discussione medievale sul tema dei futuri contingenti pone al centro dell’attenzione, da un lato, il modo di concepire conoscenza e potenza divine e, dall’altro, lo statuto degli eventi futuri. Pier Damiani, monaco dell’XI secolo, distingue fra la possibilità divina di mutare le conseguenze del passato e quella di produrre un passato interamente diverso. Pedro Damian, protagonista del racconto di Borges, riscatta il suo comportamento giovanile producendo poco alla volta un altro, diverso, passato. La potenza della memoria invece della potenza di Dio.

  16. Experimental and numerical investigation of the effect of different shapes of collars on the reduction of scour around a single bridge pier.

    Directory of Open Access Journals (Sweden)

    Afshin Jahangirzadeh

    Full Text Available The scour phenomenon around bridge piers causes great quantities of damages annually all over the world. Collars are considered as one of the substantial methods for reducing the depth and volume of scour around bridge piers. In this study, the experimental and numerical methods are used to investigate two different shapes of collars, i.e, rectangular and circular, in terms of reducing scour around a single bridge pier. The experiments were conducted in hydraulic laboratory at university of Malaya. The scour around the bridge pier and collars was simulated numerically using a three-dimensional, CFD model namely SSIIM 2.0, to verify the application of the model. The results indicated that although, both types of collars provides a considerable decrease in the depth of the scour, the rectangular collar, decreases scour depth around the pier by 79 percent, and has better performance compared to the circular collar. Furthermore, it was observed that using collars under the stream's bed, resulted in the most reduction in the scour depth around the pier. The results also show the SSIIM 2.0 model could simulate the scour phenomenon around a single bridge pier and collars with sufficient accuracy. Using the experimental and numerical results, two new equations were developed to predict the scour depth around a bridge pier exposed to circular and rectangular collars.

  17. 33 CFR 334.102 - Sandy Hook Bay, Naval Weapons Station EARLE, Piers and Terminal Channel, restricted area...

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Sandy Hook Bay, Naval Weapons... DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.102 Sandy Hook Bay, Naval Weapons Station EARLE, Piers..., shall be enforced by the Commanding Officer, Naval Weapons Station Earle, and/or other persons or...

  18. The development of iron British piers in the XIX century. The discovery of new materials

    Directory of Open Access Journals (Sweden)

    González-García de Velasco, C.

    2011-12-01

    Full Text Available In this article, the authors study the decadence of wood piers along XIX century, mainly because of problems inherent to the attacks of invertebrates. Soon, the wood structures will be substituted by iron ones, appearing two extraordinary materials, cast iron and wrought iron. Cast iron was a material with a great compression resistance, but weak for traction and flexion. It was not welding, but its resistance to the corrosion was notable, because of it, was very used at piles of British sea piers. On the contrary, wrought iron offered high conditions for traction and flexion, so it appeared like a very useful material to make girders and joists, but suffering the problem of a lack of resistance to corrosion. The combination of both materials supposed a great success in the construction of bridges and piers, since 1850.

    Se estudia en el presente artículo cómo los embarcaderos de madera iban languideciendo a partir de mediados del siglo XIX, aquejados especialmente por los ataques de invertebrados. Pronto, en los embarcaderos británicos, la madera iba a ser sustituida por el hierro, en la versión de dos nuevos materiales, la fundición y el hierro forjado. La fundición poseía una gran resistencia a la compresión, aunque poca a la tracción y a la flexión. Tampoco permitía la soldabilidad, pero presentaba un comportamiento magnífico frente a la corrosión, siendo muy utilizada para pilares en los nuevos embarcaderos. El hierro forjado presentaba menor resistencia a la corrosión pero, en cambio, ofrecía altas prestaciones a tracción y flexión, lo que lo hacía muy valioso para su colocación en vigas y forjados en los muelles. De la combinación de ambos materiales resultó el gran éxito habido en la construcción de puentes y embarcaderos metálicos, a partir de 1850.

  19. NLP-PIER: A Scalable Natural Language Processing, Indexing, and Searching Architecture for Clinical Notes.

    Science.gov (United States)

    McEwan, Reed; Melton, Genevieve B; Knoll, Benjamin C; Wang, Yan; Hultman, Gretchen; Dale, Justin L; Meyer, Tim; Pakhomov, Serguei V

    2016-01-01

    Many design considerations must be addressed in order to provide researchers with full text and semantic search of unstructured healthcare data such as clinical notes and reports. Institutions looking at providing this functionality must also address the big data aspects of their unstructured corpora. Because these systems are complex and demand a non-trivial investment, there is an incentive to make the system capable of servicing future needs as well, further complicating the design. We present architectural best practices as lessons learned in the design and implementation NLP-PIER (Patient Information Extraction for Research), a scalable, extensible, and secure system for processing, indexing, and searching clinical notes at the University of Minnesota.

  20. Pier Luigi Nervi e la scuola di Ingegneria e Architettura di Bologna

    Directory of Open Access Journals (Sweden)

    Vittorio Cimino

    2012-12-01

    Full Text Available Pier Luigi Nervi (1891-1979, poliedrico progettista, teorico, docente, costruttore e imprenditore, è stato senza dubbio uno dei protagonisti dell’architettura e dell’ingegneria del Novecento. Proprio l’essere riuscito a unire in sé le due figure – ormai da tempo distinte, nella formazione come nella professione – dell’ingegnere e dell’architetto, è stato uno dei fattori-chiave della sua opera, nella quale l’invenzione di nuove forme non è disgiunta dalla capacità di costruirle. Questo profilo interdisciplinare si è costruito negli anni della sua formazione nella Scuola di Applicazione per Ingegneri di Bologna, grazie agli insegnamenti ricevuti dai suoi maestri e alle esperienze di conoscenza e di pratica professionale, orientati a una “cultura politecnica”, alla coraggiosa volontà di sperimentazione e alla conoscenza della realtà tecnica e costruttiva.

  1. Stability Analysis of Long-Span Continuous Rigid Frame Bridge with Thin-Wall Pier

    Institute of Scientific and Technical Information of China (English)

    HE Bo; SHI Ya-nan; ZHU Hong-ping; GUO Wen-zeng; CHEN Yong

    2008-01-01

    During cantilever cast in construction of high-pier and large-span continuous rigid frame bridges, structural stability in the longest cantilevered stage is very important. Based on a practical design case of a large-span continuous rigid frame bridge in Wuhan, the longest span stability coefficient is calculated with linear-buckling and nonlinear-buckling methods, respectively. The influences of both geometrical nonlinearity and the dual nonlinearity of material and geometry are considered. Numerical results indicate that the nonlinear solution is necessary to stability analysis because linear buckling loads axe much higher than those of nonlinear buckling. Thus, the edge fiber yield criterion is more convenient and faster than ultimate loading criterion when estimating nonlinear stability of structure, and can be used easily in the initial engineering design.

  2. Seismic response of bridge pier on rigid caisson foundation in soil stratum

    Institute of Scientific and Technical Information of China (English)

    C. Tsigginos; N. Gerolymos; D. Assimaki; G. Gazetas

    2008-01-01

    An analytical method to study the seismic response of a bridge pier supported on a rigid caisson foundation embedded in a deep soil stratum underlain by a homogeneous half space is developed. The method reproduces the kinematic and inertial responses, using translational and rotational distributed Winkler springs and dashpots to simulate the soil-caisson interaction. Closed-form solutions are given in the frequency domain for vertical harmonic S-wave excitation. Comparison with results from finite element (FE) analysis and other available solutions demonstrates the reliability of the model. Results from parametric studies are given for the kinematic and inertial responses. The modification of the fundamental period and damping ratio of the bridge due to soil-structure interaction is graphically illustrated.

  3. The Influence of Pier Stiffness Ratio on the Failure Modes of Masonry Structures

    Directory of Open Access Journals (Sweden)

    Yanru Wang

    2015-01-01

    Full Text Available Masonry structure is the main form of Chinese urban and rural housing construction structure. And heavy casualties and huge economic losses are caused by the damages of masonry structures in the previous destructive earthquake. So the failure modes of masonry structures are analyzed in the paper. ABAQUS software was used; and the Xuankou High School Student Dormitory of masonry structure in Yingxiu town, severely damaged under the Wenchuan earthquake, was taken for example. The influence of the stiffness ratio of pier between windows and spandrel on the failure modes of masonry structures is discussed. The results show that the failure modes in the earthquake could be changed by controlling the stiffness ratio. Suitable stiffness ratio helps proper design of masonry structures.

  4. Docks and Piers, Port of Green Bay docks along the Fox River are complete, Published in 2008, 1:1200 (1in=100ft) scale, Brown County, WI.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Docks and Piers dataset, published at 1:1200 (1in=100ft) scale, was produced all or in part from Orthoimagery information as of 2008. It is described as 'Port...

  5. Three Dimensional Analysis of Pier Extension and Guide Wall Design Alternatives to Mitigate Local Scour Risk at the BNSF Railroad Bridge Downstream of the Prado Dam

    Energy Technology Data Exchange (ETDEWEB)

    Lottes, S. A. [Argonne National Lab. (ANL), Argonne, IL (United States); Bojanowski, C. [Argonne National Lab. (ANL), Argonne, IL (United States); Sinha, N. [Argonne National Lab. (ANL), Argonne, IL (United States); Kerenyi, K [Argonne National Lab. (ANL), Argonne, IL (United States)

    2015-03-01

    The primary objectives of the computational fluid dynamics (CFD) analysis are (1) to verify that the design concept of using wedge shaped pier extensions to divert flow around piers as a scour counter measure has the intended effect on the flow, (2) to refine the design of the length and orientation of the pier extensions within the channel and (3) to optimize the guide walls that will protect a set of outer piers and the abutments on each side of the channel. The original proposed design is shown in Figure 1.3. The results of this effort are the recommended designs that are judged to be the best designs based on results from the set of test cases run combined with engineering judgment. The refined designs from the CFD analysis are expected to be tested in a limited set of physical model experiments to verify that they work well.

  6. A task analysis of pier side ship-handling for virtual environment ship-handling simulator scenario development

    OpenAIRE

    Grassi, Charles R.

    2000-01-01

    Approved for public release: distribution is unlimited Researchers at the Naval Air Warfare Center Training Systems Divisions (NAWCTSD) in Orlando, FL have developed a testbed for the Conning Officer Virtual Environment (COVE) Ship-handling simulator. The purpose of this task analysis was to provide a workable document that they could use in the development of pier side ship-handling scenarios for their simulator. The task analysis not only identified the general procedures and methodologi...

  7. Development and evaluation of clear-water pier and contraction scour envelope curves in the Coastal Plain and Piedmont Provinces of South Carolina

    Science.gov (United States)

    Benedict, Stephen T.; Caldwell, Andral W.

    2016-01-01

    The U.S. Geological Survey in cooperation with the South Carolina Department of Transportation collected clear-water pier- and contraction-scour data at 116 bridges in the Coastal Plain and Piedmont Physiographic Provinces of South Carolina. Pier-scour depths collected in both provinces ranged from 0 to 8.0 feet. Contraction-scour depths collected in the Coastal Plain ranged from 0 to 3.9 feet. Using hydraulic data estimated with a one-dimensional flow model, predicted clear-water scour depths were computed with scour equations from the Federal Highway Administration Hydraulic Engineering Circular 18 and compared with measured scour. This comparison indicated that predicted clear-water scour depths, in general, exceeded measured scour depths and at times were excessive. Predicted clear-water contraction scour, however, was underpredicted approximately 30 percent of the time by as much as 7.1 feet. The investigation focused on clear-water pier scour, comparing trends in the laboratory and field data. This comparison indicated that the range of dimensionless variables (relative depth, flow intensity, relative grain size) used in laboratory investigations of pier scour, were similar to the range for field data in South Carolina, further indicating that laboratory relations may have some applicability to field conditions in South Carolina. Variables determined to be important in developing pier scour in laboratory studies were investigated to understand their influence on the South Carolina field data, and many of these variables appeared to be insignificant under field conditions in South Carolina. The strongest explanatory variables were pier width and approach velocity. Envelope curves developed from the field data are useful tools for evaluating reasonable ranges of clear-water pier and contraction scour in South Carolina. A modified version of the Hydraulic Engineering Circular 18 pier-scour equation also was developed as a tool for evaluating clearwater pier

  8. Research on Motion Performance of the Mobile Double-Causeway Pier System

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Mobile offshore double-causeway pier system, a type of seashore unloading equipment, consists of two groups of multiple connected semi-submersible modules. This structure has wide application because most of the middle or mini type of vessels and ships can be moored to it. Based on the analysis of computational methods of multi-body motion response, a hydrodynamic model is set up and the three-dimensional potential theory in finite depth is adopted to calculate the three-dimensional motion response of this system. The double P-M spectrum is used to analyze the motion response in irregular waves. Different wave directions are specially taken into consideration, due to their various effects to the motion response. Furthermore, the calculated result is compared with that of the experiment, and it is proved that sway, heave, pitch and yaw motion are greatly constrained by mooring system. The comparison also indicates that the model can forecast the motion performance of the target, and that the calculated result can also be used as reference in connector and mooring system design.

  9. Ultimate pier and contraction scour prediction in cohesive soils at selected bridges in Illinois

    Science.gov (United States)

    Straub, Timothy D.; Over, Thomas M.; Domanski, Marian M.

    2013-01-01

    The Scour Rate In COhesive Soils-Erosion Function Apparatus (SRICOS-EFA) method includes an ultimate scour prediction that is the equilibrium maximum pier and contraction scour of cohesive soils over time. The purpose of this report is to present the results of testing the ultimate pier and contraction scour methods for cohesive soils on 30 bridge sites in Illinois. Comparison of the ultimate cohesive and noncohesive methods, along with the Illinois Department of Transportation (IDOT) cohesive soil reduction-factor method and measured scour are presented. Also, results of the comparison of historic IDOT laboratory and field values of unconfined compressive strength of soils (Qu) are presented. The unconfined compressive strength is used in both ultimate cohesive and reduction-factor methods, and knowing how the values from field methods compare to the laboratory methods is critical to the informed application of the methods. On average, the non-cohesive method results predict the highest amount of scour, followed by the reduction-factor method results; and the ultimate cohesive method results predict the lowest amount of scour. The 100-year scour predicted for the ultimate cohesive, noncohesive, and reduction-factor methods for each bridge site and soil are always larger than observed scour in this study, except 12% of predicted values that are all within 0.4 ft of the observed scour. The ultimate cohesive scour prediction is smaller than the non-cohesive scour prediction method for 78% of bridge sites and soils. Seventy-six percent of the ultimate cohesive predictions show a 45% or greater reduction from the non-cohesive predictions that are over 10 ft. Comparing the ultimate cohesive and reduction-factor 100-year scour predictions methods for each bridge site and soil, the scour predicted by the ultimate cohesive scour prediction method is less than the reduction-factor 100-year scour prediction method for 51% of bridge sites and soils. Critical shear stress

  10. Investigation of chloride induced corrosion of bridge pier and life-cycle repair cost analysis using fiber reinforced polymer composites

    Science.gov (United States)

    Dhakal, Dinesh

    Bridges are the long term investment of the highway agencies. To maintain the required service level throughout the life of a bridge, a series of maintenance, repair, and rehabilitation (MRℝ) works can be performed. To investigate the corrosion deterioration and maintenance and repair practices in the bridge pier columns constructed in chloride-laden environment, a questionnaire survey was conducted within the 50 state Departments of Transportation (DOTs). Based on the survey data, two corrosion deterioration phases were identified. They were corrosion crack initiation phase and corrosion propagation phase. The data showed that the mean corrosion crack initiation phase for bridge pier column having cover of 50 mm, 75 mm, and 100 mm was 18.9 years, 20.3 years, and 22.5 years, respectively. The corrosion propagation phase starts after the corrosion crack initiation. The corrosion propagation is defined in a single term, corrosion damage rate, measured as percentage of area damaged due to corrosion cracking, spalling, and delamination. From the survey, the corrosion damage rate was found 2.23% and 2.10% in the bridge pier columns exposed to deicing salt water and exposed to tidal splash/spray, respectively. For this study, two different corrosion damage rates were proposed before and after the repair criteria for minor damage repair as practiced by DOTs. This study also presents the collected data regarding the corrosion effectiveness of using sealers and coatings, cathodic protection, corrosion inhibitors, carbon fiber/epoxy composites, and glass fiber/epoxy composites as maintenance and repair technique. In this study, the cost-effectiveness of wrapping carbon fiber/epoxy composites and glass fiber/epoxy composites in bridge pier columns constructed in a chloride-laden environment was investigated by conducting life-cycle cost analysis. As a repair work, externally bonded two layer of carbon fiber/epoxy and glass fiber/epoxy composites were installed by wet

  11. 连续梁墩柱合理设计的影响因素分析%Factor Analysis of Continuous Beam Pier Columns Rational Design

    Institute of Scientific and Technical Information of China (English)

    张帅; 肖锋文; 赵杰丽

    2012-01-01

    随着连续梁桥的广泛应用,连续梁桥墩柱的合理设计值得深入研究.从影响连续梁桥墩柱设计的主要因素出发,深入分析各影响因素的重要性,为连续梁桥墩柱合理设计提供参考.%With the wide application of the continuous beam bridge, the rational design of continuous beam pier column worthy of further study. In this article, starting from the main factors affecting the continuous beam bridge pier column design. In-depth analysis of the importance of each factor in order to give reference for the rational design of continuous beam bridge pier column.

  12. Metal and PAH concentrations in fruit of Vaccinium angustifolium Ait. (Lowbush Blueberry) : a comparison among Whitney Pier, North Sydney and supermarket

    Energy Technology Data Exchange (ETDEWEB)

    Hale, B. [Guelph Univ., ON (Canada). Dept. of Land Resource Science

    2004-07-01

    The concentration of various metals in the fruit harvested from Lowbush blueberry plants in Whitney Pier, Sydney, Nova Scotia (NS), North Sydney (NS) and supermarket were quantified in this report. The concentrations were compared among the 3 sources to determine whether the metal and Polycyclic Aromatic Hydrocarbons (PAHs) concentrations in the blueberries from Whitney Pier were higher or lower compared to the reference blueberries from North Sydney and the supermarket. Mean values for each of the analytes were compared using analysis of variance (ANOVA). The study determined whether washed berries have lower concentrations of contaminants than unwashed berries. The risk to human health of exposure to metals and PAHs through consumption of blueberry samples was also calculated. It was concluded that concentrations of selenium and zinc are elevated in blueberries from Whitney Pier compared to berries from North Sydney and the supermarket, but are well within safe levels. Other elements such as arsenic, titanium, vanadium, lead, copper and molybdenum were similar, and only thallium was elevated in supermarket berries relative to those from Whitney Pier and North Sydney. Chromium was not detected in any samples. It was determined that there was no risk to human health from exposure to any of the metals analyzed, regardless of whether they were Whitney Pier samples or reference samples. Only 2 PAHs were detected in one of the unwashed samples from Whitney Pier. No PAHs were found in washed berries or unwashed berries from the supermarket or North Sydney. It was concluded that there was no risk to human health from exposure to any of the PAHs. Washed and unwashed samples had similar metal concentrations, indicating that surface contamination did not occur. A full methodology of the testing program was provided. 11 refs., 7 tabs., 2 figs.

  13. Analytical Evaluation of Reinforced Concrete Pier and Cast-in-Steel-Shell Pile Connection Behavior considering Steel-Concrete Interface

    Directory of Open Access Journals (Sweden)

    Jiho Moon

    2016-01-01

    Full Text Available The seismic design of bridges may require a large-diameter deep pile foundation such as a cast-in-steel-shell (CISS pile where a reinforced concrete (RC member is cast in a steel casing. In practice, the steel casing is not considered in the structural design and the pile is assumed to be an RC member. It is partially attributed to the difficulties in evaluation of composite action of a CISS pile. However, by considering benefits provided by composite action of the infilled concrete and the steel casing, both the cost and size of CISS pile can be reduced. In this study, the structural behavior of the RC pier and the CISS pile connection is simulated by using an advanced 3D finite element (FE method, where the interface between the steel and concrete is also modeled. Firstly, the FE model is verified. Then, the parametric study is conducted. The analysis results suggest that the embedment length and the friction coefficient between the steel casing and the infilled concrete affect the structural behavior of the RC pier. Finally, the minimum embedment length with reference to the AASHTO design guideline is suggested considering the composite action of the CISS pile.

  14. Influence of piers on functional groups of benthic primary producers and consumers in the channel of a subtropical coastal lagoon

    Directory of Open Access Journals (Sweden)

    Paulo Roberto Pagliosa

    2012-03-01

    Full Text Available Artificial habitats have become common in coastal areas worldwide and may influence the structure and functioning of benthic ecosystems. We analyze the influence of piers on the benthic morphofunctional groups of rocky seaweeds and of soft bottom macrofauna in the channel of Conceição Lagoon (southern Brazil. The main impact is a reduction in the luminosity available for photosynthetic activity which is directly related to a decrease in the biomasses of sediment microphytobenthos and of more highly structured macroalgae life-forms. Contrary to expectations, the morphotypes of potentially high biomass productivity, such as articulated coralline, corticated and leathery macroalgae, were in general less abundant and the low biomass foliose and filamentous macroalgae occurred in reference areas but not under the piers. The piers' effects on motile epifauna and infauna functional groups were site-specific and probably related to the general reduction in primary producer organisms in the new habitats. The discretely motile infauna was the only functional group able to thrive under the piers due to their reduced motility and fragile morphological structures, being benefited by the shelter provided by the artificial habitats. Our results showed that the piers might have a negative effect on the base-trophic level organisms responsible for bottom-up controls.Hábitats artificiais têm se tornado comum em áreas costeiras no mundo todo, podendo influenciar a estrutura e funcionamento de ecossistemas bênticos. Nós analisamos a influência de trapiches nos grupos morfofuncionais bênticos de algas associadas a substrato consolidado e de macrofauna em substrato inconsolidado, no canal da Lagoa da Conceição (sul do Brasil. O principal impacto da presença de trapiches é a redução da irradiação disponível para atividade fotossintética, o que está diretamente relacionado com o decréscimo na biomassa microfitobentônica no sedimento e de macroalga

  15. Effect of Foundation Stiffness on Seismic Response of Frame Pier%基础刚度对框架墩地震响应的影响

    Institute of Scientific and Technical Information of China (English)

    刘孟云

    2016-01-01

    文章以京沈客专某跨线框架墩为研究对象,运用有限元软件 Midas/civil 建立框架墩的三维空间动力分析模型,研究了基础刚度对框架墩地震反应的影响。对该框架墩在0.5倍基础刚度、1倍基础刚度、2倍基础刚度、3倍基础刚度条件下分别进行多遇地震作用下的弹性时程反应分析,分析基础刚度的变化对框架墩地震反应的影响并总结影响规律。结果表明:(1)框架墩的基础刚度对其自振特性影响显著,自振频率随着基础刚度的增大而增大;(2)基础刚度的变化对框架墩的地震响应影响显著,尤其是对框架墩墩柱的地震响应影响更加明显,其地震响应随着框架墩基础刚度的增加而增加;(3)框架墩的地震响应并不是随着基础刚度线性变化的,当基础刚度较小时框架墩的地震响应变化更明显。%Taking a cross -line frame pier on Beijing -Shenyang passenger dedicated line as the research object,this paper established a spatial dynamic analysis model of frame pier with finite element software Midas/civil and analyzed the effect of foundation stiffness on seismic response of frame pier.Through elastic time history response analysis of the frame pier under earthquake action,which on the condition of 0.5 times of foundation stiffness,1 time of foundation stiffness,2 times of foundation stiffness and 3 times of foundation stiffness.The influence of the change of foundation stiffness on seismic response of frame pier is analyzed and the influence law is summarized.The results show:(1)The foundation stiffness of the frame pier has a significant impact on its free vibration characteristic,and the natural frequency increases with the increase of the foundation stiffness.(2)The change of foundation stiffness has a significant impact on the seismic response of frame pier,especially the seismic response of column of the frame pier,and the seismic response increases

  16. MPA 方法在不同高度桥墩地震响应分析中的适用性研究%Application of Modal Pushover Analysis Method to Seismic Response of Piers with Different Heights

    Institute of Scientific and Technical Information of China (English)

    蒋崇文; 王典斌; 卢皓

    2015-01-01

    Bridges are usually lifeline engineering-in-traffic projects,and their seismic performance is very important.As an important bridge construction component,piers are vulnerable to dam-age under strong ground motion.In this paper,in accord with the typical pier structure form of bridge piers in mountainous areas,a nonlinear numerical analysis model is constructed based on a fiber model.The seismic response of different piers under El-Centro is performed using modal pushover analysis (MPA).By comparison with the nonlinear time history analysis method,the applicability of the MPA method for the seismic analysis of different piers is investigated.The results show that the MPA method is not suitable for higher piers where the contribution of higher modes in seismic response is significant.With the implementation of the Western Develop-ment Program in recent years,a lot of highways and railways have been planned and built in western China.For bridges with high piers in mountainous areas,a nonlinear numerical analysis model is constructed based on a fiber model.The finite-element analysis is simulated with the code Open Sees,which was developed by Pacific Earthquake Engineering Research (PEER).The Mander model is used to imitate the constitutive model of concrete,and the Giuffré-Menegotto-Pinto model is used to imitate the constitutive model of reinforcement.The incremental dynamic analysis is used to research distribution features of pier section curvature under strong earthquake motions.As a result of the effects of higher modal contributions,the seismic response and seis-mic performance of bridges with high piers are complicated.The forming and development of a plastic range in the upper position of a pier,the damage process,and the failure mechanism of high piers under different earthquake motions are studied.The base section curvature of high piers and its top displacement are not simultaneous;it is inappropriate for pier top displacement to be used as the

  17. 76 FR 31851 - Safety Zone; Put-in-Bay Fireworks, Fox's the Dock Pier; South Bass Island, Put-in-Bay, OH

    Science.gov (United States)

    2011-06-02

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Put-in-Bay Fireworks, Fox's the Dock Pier; South Bass Island, Put-in-Bay, OH AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The..., Put-in-Bay, Ohio. This Zone is intended to restrict vessels from portions of Lake Erie for the...

  18. 33 CFR 334.1050 - Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of...

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Oakland Outer Harbor adjacent to the Military Ocean Terminal, Bay Area, Pier No. 8 (Port of Oakland Berth No. 10); restricted area. 334..., DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.1050 Oakland Outer Harbor adjacent...

  19. 限制位移桥墩的连续刚构桥抗震性能研究%Seismic Performance of a Continuous Rigid Frame Bridge with Displacement-restricted Piers

    Institute of Scientific and Technical Information of China (English)

    刘鹏

    2015-01-01

    Since the beginning of the 1 990s,performance-based seismic design theory has entered the mainstream of structural seismic research.The purpose of performance-based seismic design theory is to determine the seismic performance objectives of a building based on its use,impor-tance,and level of seismic fortification.Buildings designed in accordance with those objectives will safely withstand earthquakes that may occur in the future.On the bridge,plastic hinges placed on the piers were used to consume earthquake energy.Design for ductility can avoid collapse of the bridge.However,permanent deformation of the plastic hinges could cause serious damage to the pier.It is difficult to immediately repair bridges following earthquakes.Many transportation func-tions are significantly slowed or lost.In order to ensure that the transportation capacity of bridges is recovered quickly after a strong earthquake,many structural systems have been proposed,inclu-ding rocking bridge piers and self-centering bridge piers.The continuous rigid frame bridge system with displacement-restricted piers was consistent with the concept of rocking piers.This structure can realize three important functions:(1 )limit the maximum displacement of pier,(2 )prevent the bridge from overturning,and (3 )adjust the coefficient of friction at the pier bottom.By adhering to these objectives between the pier bottom and the pier cap,the displacement-restricted earthquake mitigation. This study concluded that the continuous rigid frame bridge system with displacement-restricted piers could reduce ductility and strength demands on the bridge piers.This paper compared the displacement limits of 2 cm,5 cm,8 cm and traditional piers.The results showed that the displacement of the pier top,the bending moment at the pier bottom,and the bending moment of the pier at the bridge beam with the displacement-restricted 2 cm,5 cm,8 cm piers were much less than the piers of a traditional continuous rigid frame bridge

  20. 29 CFR 1917.2 - Definitions.

    Science.gov (United States)

    2010-07-01

    ... between piers or wharves. Dockboards (car and bridge plates) mean devices for spanning short distances between rail cars or highway vehicles and loading platforms that do not expose employees to falls greater... include production or manufacturing areas nor does the term include storage facilities directly associated...

  1. 46 CFR Sec. 3 - Terminal operating contract.

    Science.gov (United States)

    2010-10-01

    ... Facilities as used in this agreement means piers, wharves, warehouses, covered and/or open storage space... functional field, e.g., handling lines; directing tug operations for docking vessels; planning and conducting..., and agrees to furnish its best skill and judgment in planning, supervising and performing the work,...

  2. Nonlinear Seismic Response Analysis on Concrete-Filled Steel Tubular Frame Piers%框架式钢管混凝土桥墩非线性地震反应分析

    Institute of Scientific and Technical Information of China (English)

    常山; 朱东生; 何发礼

    2013-01-01

    以框架式钢管混凝土桥墩及钢筋混凝土空心薄壁墩为研究对象,采用纤维单元建立了框架式钢管混凝土桥墩及钢筋混凝土空心薄壁墩的非线性动力分析模型,输入3条地震波,计算得到了框架式钢管混凝土桥墩与钢筋混凝土空心薄壁墩的线性及非线性地震时程响应,比较了不同类型桥墩地震响应的差异,讨论了框架式钢管混凝土桥墩的地震反应特点.%Taking concrete-filled steel tubular frame pier and hollow thin-walled pier as the research projects,the dynamic time-history analysis models are established by using the fiber element for concrete-filled steel tubular frame pier and hollow thin-walled pier.By inputting 3 actual seismic waves into the analysis models,the linear and nonlinear time-history response is analyzed respectively.Based on the analysis results,the effect of seismic response for different piers is compared,and seismic response characteristics of frame pier are discussed.The results show that shear response appears linear distribution,moment response represents serrated distribution and axial force response emerges stepwise increase along the column height for frame pier under the action of waves.Shear,moment and axial force response of one column of frame pier are relatively smaller compared with hollow thin-walled pier under the action of waves.

  3. Nonlinear Stability Analysis of Long-Span Continuous Rigid Frame Bridge with Thin-Wall High Piers

    Institute of Scientific and Technical Information of China (English)

    Li Li; Peng Yuancheng; Long Xiaohong; Liao Ping

    2005-01-01

    By utilizing the current finite element program ANSYS, two types of finite element models (FEM), the beam model (BM) and shell model (SM), are established for the nonlinear stability analysis of a practical rigid frame bridge-Longtanhe Great Bridge. In these analyses, geometrical and material nonlinearities are simultaneously taken into account. For geometrical nonlinearity, updated Lagrangian formulations are adopted to derive the tangent stiffness matrix. In order to simulate the nonlinear behavior of the plastic hinge of the piers, the multi-lines spring element COMBIN39 is used in the SM while the bilinear rotational spring element COMBIN40 is employed in the BM. Numerical calculations show that satisfying results can be obtained in the stability analysis of the bridge when the double coupling nonlinearity effects are considered. In addition, the conclusion is significant for practical engineering.

  4. «O utinam anima mea esset in corpore tuo!». Pier Damiani, l’amicitia monastica e la riforma

    Directory of Open Access Journals (Sweden)

    Umberto Longo

    2010-06-01

    Full Text Available L'amicizia si esprimeva attraverso la densissima serie di relazioni di Pier Damiani con una folla di interlocutori, a cominciare dai membri della sua comunità per finire con i monaci di Cassino e Cluny. Una speciale sensibilità emotiva e la condivisione di peculiari comportamenti ascetici e penitenziali alimentavano la forza vincolante che orientava la ristretta cerchia degli asceti seguaci di Pier Damiani a sviluppare, attorno alla passione di Gesù, una teologia per cercare di vivere la propria carne. Per quanto riguarda gli anni '60 del secolo XI si cerca di estendere la proposta di perfezione ascetica di questa cerchia, in particolare verso il monachesimo di Cassino.

  5. 新型耗能辅助墩抗震性能的参数研究%PARAMETRIC STUDIES OF SEISMIC PERFORMANCE ON ENERGY DISSIPATION SUBSIDIARY PIERS

    Institute of Scientific and Technical Information of China (English)

    魏俊; 孙利民

    2012-01-01

    基于地震损伤控制设计的思想,作者提出了一种耗能型辅助墩结构形式.为了研究辅助墩的抗震性能,保护强震作用下超大跨斜拉桥的主塔,该文采用非线性静力分析方法对辅助墩的各种参数进行了分析,探讨了墩柱尺寸及间距,软钢剪力连杆尺寸、布置道数及间距等参数变化对辅助墩抗震性能的影响.结果表明:混凝土墩柱和剪力连杆的刚度需要一个合适的比例,墩柱间距应满足剪力连杆发生剪切型屈服的要求,剪力连杆布置方式的影响可以忽略.%Based on seismic damage control design strategies, a kind of new energy dissipation subsidiary piers is proposed. In order to investigate the seismic performance of subsidiary piers and protect the towers of long span cable-stayed bridges under a strong earthquake, various parameters of subsidiary piers are analyzed employing a nonlinear static analysis method in this paper. The influences of the parameters which include dimensions and spacing of columns, dimensions, numbers and spacing of shear links on the seismic performance of subsidiary piers are discussed. The results show that appropriate stiffness ratio of columns and shear links is needed, and the distance between columns satisfies the requirement of the shear yield of shear links, and the influence of the layout fashion of shear links is ignored.

  6. 钢筋混凝土空心墩抗震数值分析模型%Numerical seismic analysis model for hollow reinforced concrete bridge piers

    Institute of Scientific and Technical Information of China (English)

    杨春喜

    2014-01-01

    钢筋混凝土空心墩在大型铁路、公路桥梁工程中占有相当大的比例。准确模拟空心墩抗震能力对保证桥梁工程抗震安全具有重要意义。采用Open Sees数值分析平台,基于纤维梁柱单元和零长度转动弹簧单元,考虑试件弯曲和纵筋拔出变形,对3个钢筋混凝土空心墩抗震拟静力试验结果进行模拟计算。将模拟得到的滞回曲线与试验结果进行了对比分析。结果表明,模拟结果与试验结果吻合较好。%Hol ow reinforced concrete bridge piers are extensively used in highway and railway bridges. Simulation of the seismic behavior of hol ow bridge piers is important to ensure the seismic safety of bridges. Based on fiber beam-column element and zero length rotation spring element, three hol ow reinforced concrete bridge piers are modeled by using OpenSees software, in which the flexural and bond-slip deformation of the piers are considered. The simulated hysteretic curves are compared with test results. The results show that the simulated results agreed wel with test results.

  7. Simulation Study of Day-Night Variations in Emissions Impacts and Network Augmentation Schemes: An Application to PierPASS Policy for Port Trucks in California

    OpenAIRE

    Bhagat, Ankoor

    2014-01-01

    Freight operations are critical to our prosperity, but they also generate substantial external costs in the form of additional congestion, air pollution, and health impacts. Unfortunately these external costs are not well understood. In this dissertation, I focus on the drayage trucks that serve the San Pedro Bay Ports (or SPBP, i.e. the Ports of Los Angeles and Long Beach in Southern California), which is the largest port complex in the country. This research focuses on the PierPASS program,...

  8. Usability and Feasibility of PIERS on the Move: An mHealth App for Pre-Eclampsia Triage.

    Science.gov (United States)

    Lim, Joanne; Cloete, Garth; Dunsmuir, Dustin T; Payne, Beth A; Scheffer, Cornie; von Dadelszen, Peter; Dumont, Guy A; Ansermino, J Mark

    2015-04-17

    Pre-eclampsia is one of the leading causes of maternal death and morbidity in low-resource countries due to delays in case identification and a shortage of health workers trained to manage the disorder. Pre-eclampsia Integrated Estimate of RiSk (PIERS) on the Move (PotM) is a low cost, easy-to-use, mobile health (mHealth) platform that has been created to aid health workers in making decisions around the management of hypertensive pregnant women. PotM combines two previously successful innovations into a mHealth app: the miniPIERS risk assessment model and the Phone Oximeter. The aim of this study was to assess the usability of PotM (with mid-level health workers) for iteratively refining the system. Development of the PotM user interface involved usability testing with target end-users in South Africa. Users were asked to complete clinical scenario tasks, speaking aloud to give feedback on the interface and then complete a questionnaire. The tool was then evaluated in a pilot clinical evaluation in Tygerberg Hospital, Cape Town. After ethical approval and informed consent, 37 nurses and midwives evaluated the tool. During Study 1, major issues in the functionality of the touch-screen keyboard and date scroll wheels were identified (total errors n=212); during Study 2 major improvements in navigation of the app were suggested (total errors n=144). Overall, users felt the app was usable using the Computer Systems Usability Questionnaire; median (range) values for Study 1 = 2 (1-6) and Study 2 = 1 (1-7). To demonstrate feasibility, PotM was used by one research nurse for the pilot clinical study. In total, more than 500 evaluations were performed on more than 200 patients. The median (interquartile range) time to complete an evaluation was 4 min 55 sec (3 min 25 sec to 6 min 56 sec). By including target end-users in the design and evaluation of PotM, we have developed an app that can be easily integrated into health care settings in low- and middle-income countries

  9. Earthquake Response Analysis of High Pier T -beam Bridge in Mountainous Region%山区高墩梁桥抗震分析

    Institute of Scientific and Technical Information of China (English)

    杨相展

    2012-01-01

    A seven spans of 40m T - beam high pier bridge is studied in this paper. By utilizing the finite ele- ment software, a three - dimensional mechanics model is established. Based on the model, seismic behavior of T - beam high pier bridge, in which various support links between pier and beam are considered, is investigated by u- sing the nonlinear time history method. The results indicate that structural earthquake -resistance performance can be improved by using seismic isolation bearing.%以一座7—40mT梁高架桥为研究对象,建立了三维空间模型,采用非线性时程分析方法,分析了不同墩梁连接方式的山区高墩T梁桥的抗震性能,计算结果表明:采用铅芯隔震橡胶支座可以提高桥梁的抗震性能。

  10. A comparison of answer retrieval through four evidence-based textbooks (ACP PIER, Essential Evidence Plus, First Consult, and UpToDate): a randomized controlled trial.

    Science.gov (United States)

    Ahmadi, Seyed-Foad; Faghankhani, Masoomeh; Javanbakht, Anna; Akbarshahi, Maryam; Mirghorbani, Maryam; Safarnejad, Bahareh; Baradaran, Hamid

    2011-01-01

    The efficacy of bedside information products has not been properly evaluated, particularly in developing countries. To compare four evidence-based textbooks by comparing efficacy of their use by clinical residents, as measured by the proportion of questions for which relevant answers could be obtained within 20 min, the time to reach the answer and user satisfaction. One hundred and twelve residents were taught information mastery basics and were randomly allocated to four groups to use: (1) ACP PIER, (2) Essential Evidence Plus (formerly InfoRetriever), (3) First Consult, and (4) UpToDate. Participants received 3 of 24 questions randomly to retrieve the answers from the assigned textbook. Retrieved answers and time-to-answers were recorded by special designed software, and the researchers determined if each recorded answer was relevant. The rate of answer retrieval was 86% in UpToDate, 69% in First Consult, 49% in ACP PIER, and 45% in Essential Evidence Plus (p UpToDate, 15.9 min using First Consult, 16.3 min using Essential Evidence Plus, and 17.3 min using ACP PIER (p UpToDate seems more comprehensive in content and also faster than the other three evidence-based textbooks. Thus, it may be considered as one of the best sources for answering clinicians' questions at the point of care.

  11. Inquiry on construction technology of high bridge pier%桥梁高墩施工技术探讨

    Institute of Scientific and Technical Information of China (English)

    郭卫琦

    2012-01-01

    针对现在工程建设主要采用的翻模、滑模及爬模三种高墩施工技术进行了分析,结合墩柱尺寸为5.5 m×2.5 m的等截面矩形高墩柱为例加以阐述,主要从施工构成、施工工艺及施工要点等方面分别对三种施工技术进行了论述,并提出了施工中的优缺点,以期为类似工程施工提供参考。%The paper analyzes the construction technologies of turnover formwork, sliding formwork and climbing formwork adopted in contemporary engineering construction. Taking the high rectangular pier column with section size of 5.5 m × 2.5 m as an example, the paper discusses three construction techniques from aspects of construction composition, construction technology and construction points and so on, and puts forward construction pros and cons, with a view to provide certain reference for similar engineering construction.

  12. 3D NUMERICAL SIMULATION ON WATER AND AIR TWO-PHASE FLOWS OF THE STEPS AND FLARING GATE PIER

    Institute of Scientific and Technical Information of China (English)

    ZHANG Ting; WU Chao; LIAO Hua-sheng; HU Yao-hua

    2005-01-01

    A new-style flood discharging dam, which consolidates the flaring gate pier and the stepped spillway for discharging the flood through the dam surface, had been applied in China. The theoretical study on it is in a beginning stage at present. The three-dimensional numerical simulation has not been reported. In this paper, the 3D numerical calculation on the two-phase flow of water and air with discharge per unit width 195m3/s* m is presented . The results indicate that there is negative pressure on the juncture of the spillway surface and the first step. There forms obvious longitudinal and transverse eddies on the steps and the velocity decreases obviously compared with the smooth spillway. The figures of the velocity distributions and the water-air two-phase flows are plotted. The results calculated on the pressure are in agreement with the experimental data. Based on the position of the negative pressure obtained from calculation, measurement points of pressure are arranged in physical model. The experimental results validate the existence of the negative pressure. Being an applied and trial study, the results obtained are of theoretical and practical significance.

  13. A型高墩大跨混凝土连续刚构桥地震反应影响分析%Impact Analysis of Seismic Response A Type High Pier and Long Span Concrete Continuous Rigid Frame Bridge

    Institute of Scientific and Technical Information of China (English)

    陈思孝; 夏修身; 李锐

    2014-01-01

    Remarkable characteristics of A type high pier and long span concrete continuous rigid frame bridge are high pier, larye span, massive girder and pier. This paper analyzes the influence of P-delta effect, the traveling wave effect on the A type high pier and long-span continuous rigid frame bridge seismic response of concrete and elastic plastic re-sponse characteristics of earthquake, it also discusses the seismic ductility design method of A type high pier and long span concrete continuous rigid frame bridge. The results showed that: A type continuous rigid frame bridge with high piers on seismic design limited ductility is reasonable, P-delta has little effect on type A high pier and long-span continu-ous rigid frame bridge’s response in earthquake, which cauld be ignared in design; traveling wave effect on the A type high pier and long-span continuous rigid frame bridge response earthquake should be combined with a specific type of bridge and bridge site selection. Reasonable seismic wave velocity and proper travelling wave speed should be selected in analysis. The research could sexve as a reference for high pier and long-span Railway Bridge design.%A型高墩大跨混凝土连续刚构桥的显著特点是墩高、跨度大、梁体及墩身质量巨大。文章分析了P-Δ效应、行波效应对A型高墩大跨混凝土连续刚构桥地震反应的影响及弹塑性地震反应特点,探讨了A型高墩大跨混凝土连续刚构桥的延性抗震设计方法。结果表明: A型高墩连续刚构桥按有限延性的抗震设计比较合理,P-Δ效应对A型高墩大跨连续刚构桥地震反应的影响较小,设计中可以忽略;行波效应对A型高墩大跨连续刚构桥地震反应的影响应结合具体的桥型、桥址场地类别,选取合理的地震动、恰当的行波速度进行分析。

  14. Comparison and Analysis for High Pier Formwork Construction of Bridge Engineering%桥梁工程高墩模板施工技术比较分析

    Institute of Scientific and Technical Information of China (English)

    易达; 葸振东

    2016-01-01

    The economical indexes for suspension formwork, climbing formwork, sliding formwork, roller formwork and hanging formwork construction used in bridge piers are compared. From the construction principle, formwork cost, personnel and equipment, construction schedule, construction quality and safety, this paper describes their applicability. The analysis results show that if the bridge has oblique piers, the hydraulic climbing formwork is best; if the pier is not high and has loose schedule, the suspension formwork is suitable;and if it has tight schedule, the sliding formwork should be considered;if considering the comprehensive factors, hanging formwork and roller formwork should be applied.%对桥梁工程高墩用悬模、爬模、滑模、辊模和吊模施工技术经济指标进行比较,从各种施工技术的原理、模板系统成本、人员及机械设备、施工进度、施工质量和施工安全性等方面阐述了其适用性.分析结果表明:如果是带斜率的桥墩施工,则最好用液压爬模施工;如果桥墩不高、进度宽松时可以用悬模施工;强调进度的山区高墩,可考虑滑模施工;如果综合考虑各方因素,则可考虑吊模、辊模施工.

  15. Three Dimensional Analysis of the Final Design of Pier Extensions and West Guide Wall to Mitigate Local Scour Risk at the BNSF Railroad Bridge Downstream of the Prado Dam Supplemental Report

    Energy Technology Data Exchange (ETDEWEB)

    Lottes, S. A. [Argonne National Lab. (ANL), Argonne, IL (United States); Sinha, N. [Argonne National Lab. (ANL), Argonne, IL (United States); Bojanowski, C. [Argonne National Lab. (ANL), Argonne, IL (United States); Kerenyi, K. [Turner-Fairbank Highway Research Center, McLean, VA (United States); Sharp, Jeremy [U.S. Army Corps of Engineers, Vicksburg, MI (United States), Coastal and Hydraulics Lab

    2016-06-01

    This report is a supplement to a previous report [ref] covering optimization of wedge shaped pier extensions to streamline large bluff body piers as a local scour countermeasure for the Burlington Northern and Santa Fe (BNSF) Railroad Bridge over the Santa Ana River downstream of Prado Dam in Riverside County, CA. The optimized design was tested in a 1/30 scale physical model at U.S. Army Engineer Research and Development Center (ERDC) in Vicksburg, MS, and the optimized design was used as the base for the construction design. Constructability issues having to do with both materials and site conditions including access underneath the BNSF bridge yielded a construction design that required making the pier extensions wider and either moving the western curve of the west guide wall upstream or changing its geometry.

  16. Simplified Calculation of "Crack front " of Double Reinforced Concrete Rectangular Piers%双筋矩形截面混凝土墩柱的开裂前沿简化计算

    Institute of Scientific and Technical Information of China (English)

    彭建中; 叶永

    2011-01-01

    According to the theory in basal mechanics, this thesis predigested the mechanical mode of the double reinforced rectangular concrete column, built the mechanical balance equation, and analysed stress process of the pier in theory. Under the condition that regarding concrete is being pulled, we should search the position of neutral axis of the cracking section by "three-phase" theory in order to get function expression of the concrete's resisting power along the length direction of the pier. These calculated results can be applied to the deformation analysis of the reinforced concrete cantilever bridge piers; and " three-phase " theory can be used to calculate stiffness of pier's each section; and the displacement of pier's top; and then be helped to do cracking mechanism of reinforced concrete piers under complex loads.%基于力学理论,对双筋矩形截面混凝土墩柱受力模式进行简化,建立模型的力学平衡方程,并分析墩柱模型的受力过程及开裂机理.运用“三段式”方法,在考虑混凝土受拉的条件下,求解墩柱开裂截面中性轴的位置,得到混凝土抗力△P(z)沿墩身分布的函数表达式.计算结果可适用于钢筋混凝土悬臂桥墩变形分析,提出的“三段式”分析方法可以求出墩柱各截面刚度以及墩柱墩顶位移曲线,有助于钢筋混凝土墩柱在复杂载荷作用下的开裂机理研究.

  17. 论斜拉桥墩台基础及桩基施工放样%On the cable-stayed bridge pier foundation and pile foundation construction stakeout

    Institute of Scientific and Technical Information of China (English)

    王成全

    2012-01-01

      结合实例介绍了斜拉桥墩台基础、桩基施工放样技术、墩台定位的方法、索塔施工测量放样以及高塔柱施工测量的施工方法。%  The cable-stayed bridge pier foundation, pile foundation construction stakeout technical positioning pier, Sarasota Construction Setting High Tower Construction Survey Construction Methods with examples.

  18. Construction Technique for River Pier Foundations Sitting on Bare Rock Riverbed%裸岩河床水中墩基础施工技术

    Institute of Scientific and Technical Information of China (English)

    申永利

    2016-01-01

    长昆客专罗旧舞水特大桥主桥为(48+2×80+48) m连续梁桥,1号~3号桥墩位于主河槽内,低桩承台嵌入河床裸岩中,设16根φ1.5 m钻孔桩。根据裸岩河床、低桩承台的特点,确定水中墩基础施工采用施工栈桥为交通便道、施工平台,栈桥标准跨度18 m ,设4组贝雷梁、双排钢管桩基础,并在钢管桩周围抛填砂砾、投放石笼或下放钢套箱、灌注水下混凝土以及拉设缆风绳。水中墩基础采用矩形双壁钢围堰围护方案,按照“先堰后桩”顺序施工。水中墩基础施工中,采用长臂挖机清底,利用岩石乳化炸药和非电微差雷管进行水下岩石爆破;钢护筒采用振动锤夹持、插打;双壁钢围堰依靠钻孔桩护筒、平台辅助钢管桩逐块拼装,用倒链下放、汽车吊接高下沉施工;围堰封底混凝土等强后,进行钻孔桩、承台和墩柱施工,最后拆除围堰。%The main bridge of Luojiu Wushui River Bridge on the Changsha‐Kunming Passen‐ger Dedicated Railway is a (48+2 × 80+48) m continuous beam bridge .The pier No .1 ,pier No .2 and pier No .3 stand in the main river channel ,the low pile caps of w hich are embedded in the bare rocks on the riverbed .T he foundation of the pier consists of 16 bored piles each 1 .5 m in diameter . To suit the characteristics of the bare rock riverbed and the low pile caps ,the construction trestle was used as the transportation access and the construction platform during the construction of the river pier foundations .The trestle ,with standard span length of 18 m ,consists of 4 groups of bai‐ley beams that are supported by two rows of steel pipe piles .The steel pipe piles were surrounded by riprap ,based on which the stone cage or suspended steel box was lowered .Then the tremie concrete was cast and wind cables were installed and tensioned .The river pier foundation was con‐structed with the assistance of the rectangular

  19. John Pier, Configurazioni narrative

    Directory of Open Access Journals (Sweden)

    Alessandra Diazzi

    2009-06-01

    Full Text Available Il presente lavoro si muove in direzione di una narratologia intertestuale che integri una riflessione semiotica e strumenti di logica, ponendo al centro il concetto di «configurazione» quale modello di comprensione (Mink, Ricoeur. Il concetto di «sceneggiature intertestuali» permette di accostarsi all‘atto di lettura interpretandolo come procedimento di abduzione, attraverso cui il Lettore Modello (Eco trova nella propria enciclopedia intertestuale le cosiddette «sceneggiature» ossia «strutture di base» più o meno riconoscibili in ogni racconto. Tramite una lettura di Lolita si giunge a delineare l‘atto interpretativo come un procedimento abduttivo in cui ricorrono «sceneggiature intertestuali», potendo così individuare nel testo quei percorsi, spesso latenti, che una lettura critica deve essere capace non solo di seguire ma anche di tracciare.

  20. A risk prediction model for the assessment and triage of women with hypertensive disorders of pregnancy in low-resourced settings : the miniPIERS (Pre-eclampsia Integrated Estimate of RiSk) multi-country prospective cohort study

    NARCIS (Netherlands)

    Payne, Beth A.; Hutcheon, Jennifer A.; Ansermino, J. Mark; Hall, David R.; Bhutta, Zulfiqar A.; Bhutta, Shereen Z.; Biryabarema, Christine; Grobman, William A.; Groen, Henk; Haniff, Farizah; Li, Jing; Magee, Laura A.; Merialdi, Mario; Nakimuli, Annettee; Qu, Ziguang; Sikandar, Rozina; Sass, Nelson; Sawchuck, Diane; Steyn, D. Wilhelm; Widmer, Mariana; Zhou, Jian; von Dadelszen, Peter

    2014-01-01

    Background: Pre-eclampsia/eclampsia are leading causes of maternal mortality and morbidity, particularly in low-and middle-income countries (LMICs). We developed the miniPIERS risk prediction model to provide a simple, evidence-based tool to identify pregnant women in LMICs at increased risk of deat

  1. 连盐铁路连续梁桥异形墩结构分析%On analysis of special-shaped pier structure of continuous beam bridges along Lianyungang-Yancheng railway

    Institute of Scientific and Technical Information of China (English)

    王军生

    2011-01-01

    The paper adopts the common finite element analysis procedure ANSYS to undertake the space finite element analysis of No.117 pier of Xinshuhe Bridge along Lianyungang-Yancheng railway,establishes the space finite element analysis model for No.117 pier,simulates the loading of the boundary conditions,the dead load,and the active load,and concludes the spatial analysis of the pier stressed status and the internal results,so as to provide the theoretic direction for the pier structure design.%采用通用有限元分析程序ANSYS对连盐铁路新沭河特大桥117号墩进行了空间有限元分析,建立了117号墩的空间有限元模型,模拟了边界条件、恒载和活载的加载等,得到空间分析的墩身应力状态和内力结果,以期为墩身结构设计提供理论指导。

  2. A new fender system for bridge pier protection against vessel collision%桥墩新型防船撞装置防撞性能研究

    Institute of Scientific and Technical Information of China (English)

    姜华; 耿波; 张锡祥

    2014-01-01

    桥墩防船撞装置通常用于减小船撞力或者拨转船只使其远离桥墩,有效的防撞装置对桥梁和船只安全运行都非常重要。采用 LSDYNA 对一座五跨连续刚构桥采用的新型浮式耗能防船撞装置的防撞性能进行评估。这种新型防船撞装置可以既保护桥墩又可以保护船只,其结构由模块化的 FRP 套箱组成,套箱内部由八边形 FRP 柱壳组成,具有初始造价低、施工方便和维修养护成本低等优点。介绍了所用 FRP 材料的强度试验,包括拉伸、压缩、弯曲和剪切,并根据强度试验定义了正交各向异性本构模拟 FRP 材料。研究表明:该新型防撞装置具有非常好的吸能能力,可以显著减小作用在桥墩和船只上的撞击力。%Bridge physical protection systems are typically used to reduce vessel impact loads to non-destructive levels or to redirect aberrant vessels away from bridge piers.An efficient physical protection system is critical for safe operation of bridges and vessels.Here,a performance evaluation of a new floating fender system used for a five-span pre-stressed concrete bridge was performed by utilizing LS-DYNA.This new floating fender system could protect both bridge piers and vessels.It was composed of FRP box modules filled with rows of FRP tubes with advantages of low initial cost, modular construction /repairing,and low maintenance cost.The vessel-bridge collision analysis was conducted using an orthotropic FRP composite material model defined with the results of strength tests including tension,compression, bending,and shear tests of FRP specimens.It was shown that this new fender system has excellent energy absorbing capabilities and significantly reduces collision forces imposed on bridge piers and colliding vessels.

  3. 高架桥薄壁空心高墩施工%Construction Organizational Design for High Hollow Thin-wall Pier of Viaduct Bridge

    Institute of Scientific and Technical Information of China (English)

    冯世敏

    2014-01-01

    PJ-200 Cantilever formwork ( climbing formwork ) and big steel formwork lifted with tower crane ( turnover formwork construction) have been adopted for the construction of high hollow thin-wall pier of Hewei Bridge at Km:253+353 of Lechang-Guangzhou Expressway, which has achieved good economic benefits.%乐昌至广州高速公路K253+353河尾大桥薄壁空心高墩施工组织设计采用PJ-200悬臂模板(即爬模施工)和塔吊提升大块钢模的方法施工(即翻模施工)相结合的方式,取得了较好的经济效益。

  4. Earthquake Response Analysis of High Pier and Upper Auxiliary Structure%高闸墩及其上部附属结构地震响应分析

    Institute of Scientific and Technical Information of China (English)

    谢义华; 宫必宁; 刘莎

    2013-01-01

    At present, there is less aseismic research on the upper auxiliary structure and has no standards for mention, so it leads to random and empirical knowledge for equivalent static calculation. Dynamic time-history method is applied to calculate pier and frame structures of a hydropower station in the northwestern districts by using ADINA software. And the coupling effect between different structures is discussed under the action of earthquake through dynamic characteristics of different structures and response characteristics at different operating conditions. The results show that under the action of earthquake, pier and frame structures with mutational mass and stiffness in vertical direction produce structural damages like whiplash effect easily. So this phenomenon must be taken a special attention when designing.%鉴于我国对上部附属结构抗震研究较少,规范中也未专门提及,由此导致设计人员进行等效静力计算时带有一定的随意性和经验性.借助有限元软件ADINA,利用动力时程分析法计算了西北地区某水电站的闸墩和框架结构,并通过各结构的动力特性和不同工况下的响应特点,探讨了地震作用下结构之间的耦联作用.结果表明,在地震作用时,质量和刚度沿竖向均存在明显突变的高闸墩和框架结构易产生类鞭梢效应的结构破坏,设计时应引起格外重视.

  5. Timber vs. composite/plastic pile fender systems in Pearl Harbor maintenance cost comparison

    OpenAIRE

    Alling, Joseph

    1996-01-01

    CIVINS The Navy has traditionally used treated timber materials for fender systems for piers and wharves in Pearl Harbor. In recent years, the costs associated with the use of timber have escalated and the Navy has begun to use plastic piles at installations around the world to replace timber fender systems. Plastic fender systems are more expensive, but have greater energy absorption capabilities and are more resilient to environmental decay. To determine whether plastic piles are a cost ...

  6. Calculation analysis on portal frame pier structure of expressway reconstruction and extension%改扩建高速公路门架墩结构计算分析

    Institute of Scientific and Technical Information of China (English)

    郜小兴; 晏炳科

    2012-01-01

    通过对某改扩建高速公路门架墩结构的有限元计算分析,总结了其结构受力特点,并对考虑和不考虑桩基参与受力两种情况下的门架墩计算结果进行了探讨,进而得出了一些有指导意义的结论。%Through the finite element calculation analysis on a portal frame pier structure of expressway reconstruction and extension,this paper summarized the force characteristics of this structure,and discussed the calculation results of portal frame pier under considering and not considering pile foundation in force two situations,and then gained some instructive conclusions.

  7. Construction Technique for Accurate Positioning of Large Steel Boxed Cofferdam Using Pulling and Berthing Pier System%大型钢吊箱拉靠墩系统精确定位施工技术

    Institute of Scientific and Technical Information of China (English)

    陈超华; 徐斯林; 穆清君

    2011-01-01

    The main bridge of Wuhan Erqi Changjiang River Bridge is a three-pylon composite girder cable-stayed bridge. The pile cap of pylon pier No. 3 of the bridge is located in deepwater and was constructed in dry environment in large steel boxed cofferdam. To resolve the problem of accurate positioning of the large cofferdam, the pulling and berthing pier system was used after comparison of the different positioning schemes. The pier system is composed of a pulling pier at the upstream side and a berthing pier at the downstream side, on the pulling pier, the main pulling cables and tie-down cables were set while on thg berthing pier, the crisscross pulling cables were set. The positioning anchors were cast into the river longitudinally along the bridge and the side anchoring cables were set. After construction preparation, the cofferdam was initially posi-tioned by the pulling and berthing pier system to make the cofferdam basically set in place in plan position. By using the side anchoring cables, pulling cables and by means of non-uniform pumping of water into the bulks of the cofferdam, the plan position, plan torsion, oscillation and perpendicularity of the cofferdam were adjusted and the plan offsetting of the cofferdam was brought to be within +12 mm, the torsional angle to be 58" and the inclination to be 1/3 000 so as to make the construction of the cofferdam meet the relevant requirements in the codes and eventually realize the accurate positioning of the cofferdam.%武汉二七长江大桥主桥为三塔结合梁斜拉桥,其3号墩位于深水中,采用钢吊箱实现承台干施工.为解决大型钢吊箱精确定位难题,经过方案比选,采用拉靠墩系统定位方案,该系统由上游拉墩和下游靠墩组成,拉墩设主拉缆和下拉缆,靠墩设交叉拉缆,顺桥向抛锚,设置边锚缆.施工准备后,利用拉靠墩系统进行钢吊箱初定位,使其平面位置基本就位;通过边锚缆系统、拉缆系统及夹壁舱不均衡灌

  8. 钢筋混凝土双柱桥墩抗震能力Pushover分析%Pushover analysis of the seismic capacity of reinforced concrete double-column bridge piers

    Institute of Scientific and Technical Information of China (English)

    王红伟; 刘建新

    2013-01-01

    介绍了Pushover分析方法的基本原理及实施步骤.通过一个算例分析,针对不同侧向力分布模式、不同高度、不同纵向配筋率的双柱桥墩进行Pushover分析.结果表明:对于普通简支梁双柱墩,高度比较低,不同侧向力加载模式对Pushover分析结果影响不大,随着桥墩高度的增加,位移延性系数降低,桥墩延性随着纵向配筋率的提高而降低.%This article deacribes the basic principle and implementation steps of the Pushover analysis method. By a numerical example, RC double-column piers with different lateral force distribution pattern, different heights and different reinforcement ratio were analyzed. The results show that the analysis results for lower piers of simple supported beam bridges are approximately identical under different lateral force distribution, while with the increase of pier height and longitudinal ratio of reinforcement, the displacement ductility factor is reduced.

  9. 钢筋混凝土桥墩承载力计算方法讨论%Discussion of Computing Methods for Bearing Capacity of Reinforced Concrete Bridge Piers

    Institute of Scientific and Technical Information of China (English)

    林上顺

    2015-01-01

    在我国山区公路桥梁工程中,钢筋混凝土高桥墩较为常见。对国内外钢筋混凝土高桥墩承载力计算方法进行分析与比较,发现我国公路桥涵设计规范的计算方法还存在不合理之处,且偏于不安全。为此,提出钢筋混凝土高桥墩承载力计算需要进一步研究的内容。%In highway bridge projects in mountainous area of China reinforced concrete high bridge piers are common.This paper analyzes and compares computing methods for bearing capacity of reinforced concrete high bridge piers at home and abroad and finds out that the computing methods in desing codes for China national highway bridges and culverts are irrational and unsafe .For this reasons , the paper proposes the conents to be further researched in computation of bearing capacity of reinforced concrete high brdige piers .

  10. A monk which celebrates, prays, teaches, corrects. The poetry of St. Peter Damian Un monaco che celebra, prega, insegna, corregge. La poetica di san Pier Damiani

    Directory of Open Access Journals (Sweden)

    Ugo Facchini

    2010-06-01

    Full Text Available To speak of St. Peter Damian's poetry is not easy, there are many literary genres, different contexts, among which the liturgy stands out, but there are also lyrics related to monastic life, and to the controversial ills' corrections of the Church of his time, such as simony and nicolaism. The complete edition published in 2007, that is the result of a long process of critical and theological research, wants to be a new way of approaching the poetry of the saint, trying to underline the sources, the occasion for the composition and finally to provide an additional seat contribution to approach ever more fully to his great personality.

    Parlare della poetica di san Pier Damiani non è facile, tanti i generi letterari, diversi i contesti fra i quali primeggia quello liturgico, ma anche poesie in versi legate alla vita monastica, alla correzione polemica dei mali della Chiesa del suo tempo, come la simonia e il nicolaismo. L'edizione integrale apparsa nel 2007, frutto di un lungo percorso di ricerca critica e teologica, vuole essere un modo nuovo di accostare la produzione poetica del santo cercando di evidenziare le fonti, l'occasione per la composizione e in ultima sede fornire un ulteriore contributo per accostarne sempre più pienamente la grande personalità.

  11. Using clinical symptoms to predict adverse maternal and perinatal outcomes in women with preeclampsia: data from the PIERS (Pre-eclampsia Integrated Estimate of RiSk) study.

    Science.gov (United States)

    Yen, Tin-Wing; Payne, Beth; Qu, Ziguang; Hutcheon, Jennifer A; Lee, Tang; Magee, Laura A; Walters, Barry N; von Dadelszen, Peter

    2011-08-01

    Preeclampsia is a leading cause of maternal morbidity. The clinical challenge lies in predicting which women with preeclampsia will suffer adverse outcomes and would benefit from treatment, while minimizing potentially harmful interventions. Our aim was to determine the ability of maternal symptoms (i.e., severe nausea or vomiting, headache, visual disturbance, right upper quadrant pain or epigastric pain, abdominal pain or vaginal bleeding, and chest pain or dyspnea) to predict adverse maternal or perinatal outcomes. We used data from the PIERS (Pre-eclampsia Integrated Estimate of RiSk) study, a multicentre, prospective cohort study designed to investigate the maternal risks associated with preeclampsia. Relative risks and receiver operating characteristic (ROC) curves were assessed for each preeclampsia symptom and outcome pair. Of 2023 women who underwent assessment, 52% experienced at least one preeclampsia symptom, with 5.2% and 5.3% respectively experiencing an adverse maternal or perinatal outcome. No symptom and outcome pair, in either of the maternal or perinatal groups, achieved an area under the ROC curve value > 0.7, which would be necessary to demonstrate a discriminatory predictive value. Maternal symptoms of preeclampsia are not independently valid predictors of maternal adverse outcome. Caution should be used when making clinical decisions on the basis of symptoms alone in the preeclamptic patient.

  12. Seasonal variation and potential sources of Cryptosporidium contamination in surface waters of Chao Phraya River and Bang Pu Nature Reserve pier, Thailand.

    Science.gov (United States)

    Koompapong, Khuanchai; Sukthana, Yaowalark

    2012-07-01

    Using molecular techniques, a longitudinal study was conducted with the aims at identifying the seasonal difference of Cryptosporidium contamination in surface water as well as analyzing the potential sources based on species information. One hundred forty-four water samples were collected, 72 samples from the Chao Phraya River, Thailand, collected in the summer, rainy and cool seasons and 72 samples from sea water at Bang Pu Nature Reserve pier, collected before, during and after the presence of migratory seagulls. Total prevalence of Cryptosporidium contamination in river and sea water locations was 11% and 6%, respectively. The highest prevalence was observed at the end of rainy season continuing into the cool season in river water (29%) and in sea water (12%). During the rainy season, prevalence of Cryptosporidium was 4% in river and sea water samples, but none in summer season. All positive samples from the river was C. parvum, while C. meleagridis (1), and C. serpentis (1) were obtained from sea water. To the best of our knowledge, this is the first genetic study in Thailand of Cryptosporidium spp contamination in river and sea water locations and the first report of C. serpentis, suggesting that humans, household pets, farm animals, wildlife and migratory birds may be the potential sources of the parasites. The findings are of use for implementing preventive measures to reduce the transmission of cryptosporidiosis to both humans and animals.

  13. A risk prediction model for the assessment and triage of women with hypertensive disorders of pregnancy in low-resourced settings: the miniPIERS (Pre-eclampsia Integrated Estimate of RiSk multi-country prospective cohort study.

    Directory of Open Access Journals (Sweden)

    Beth A Payne

    2014-01-01

    Full Text Available Pre-eclampsia/eclampsia are leading causes of maternal mortality and morbidity, particularly in low- and middle- income countries (LMICs. We developed the miniPIERS risk prediction model to provide a simple, evidence-based tool to identify pregnant women in LMICs at increased risk of death or major hypertensive-related complications.From 1 July 2008 to 31 March 2012, in five LMICs, data were collected prospectively on 2,081 women with any hypertensive disorder of pregnancy admitted to a participating centre. Candidate predictors collected within 24 hours of admission were entered into a step-wise backward elimination logistic regression model to predict a composite adverse maternal outcome within 48 hours of admission. Model internal validation was accomplished by bootstrapping and external validation was completed using data from 1,300 women in the Pre-eclampsia Integrated Estimate of RiSk (fullPIERS dataset. Predictive performance was assessed for calibration, discrimination, and stratification capacity. The final miniPIERS model included: parity (nulliparous versus multiparous; gestational age on admission; headache/visual disturbances; chest pain/dyspnoea; vaginal bleeding with abdominal pain; systolic blood pressure; and dipstick proteinuria. The miniPIERS model was well-calibrated and had an area under the receiver operating characteristic curve (AUC ROC of 0.768 (95% CI 0.735-0.801 with an average optimism of 0.037. External validation AUC ROC was 0.713 (95% CI 0.658-0.768. A predicted probability ≥25% to define a positive test classified women with 85.5% accuracy. Limitations of this study include the composite outcome and the broad inclusion criteria of any hypertensive disorder of pregnancy. This broad approach was used to optimize model generalizability.The miniPIERS model shows reasonable ability to identify women at increased risk of adverse maternal outcomes associated with the hypertensive disorders of pregnancy. It could be

  14. 高瓦斯矿井高水材料充填墩柱沿空留巷技术%Gateway Retained Along Goaf Technology with Pier Pillar Backfilled with High Water Material in High Gassy Mine

    Institute of Scientific and Technical Information of China (English)

    史国跃

    2014-01-01

    In order to improve a high timber consumption,high labor intensity,complicated construction and low support strength of the timber pack gateway retained along the goaf,a high water material was applied to backfill the pier pillar for the gateway retained along the goaf technology in Gaohe Mine and the industrial trial was conducted in No. E1302 air return gateway.The results showed that the max convergence between the roof and floor of the timber pack gateway retained along the goaf was 286 mm,the max convergence between the roof and floor of the gateway retained along the goaf with the pier pillar backfilled with the high water material was 188 mm and the max deformation value of the pier pillar was 65 mm.The construction technology of the gateway retained along the goaf with the pier pillar backfilled with the high water material was simple.The compressive strength of the pier pillar was high and could control the deformation of the surrounding rock.Meanwhile,the ventilation cross section enlarged of the mine roadway would be favorable for the ventilation gas discharging and could prevent the gas accident occurred in the mine.%为了改善木垛沿空留巷木料消耗量大、劳动强度高、施工复杂、支护强度较低的问题,高河煤矿采用了高水材料充填墩柱沿空留巷技术,并在E1302回风巷进行了工业性试验。结果表明:木垛沿空留巷顶底板最大移近量为286 mm,采用高水材料充填墩柱沿空留巷技术顶底板最大移近量为188 mm,墩柱最大变形量为65 mm,高水材料充填墩柱沿空留巷技术施工工艺简单、墩柱抗压强度大,可有效控制围岩变形,同时增大巷道通风断面有利于风排瓦斯,防止矿井发生瓦斯事故。

  15. 驶经桥墩船体非定常水动力相互作用数值预报%Numerical prediction of the unsteady hydrodynamic interaction between a ship and a bridge pier

    Institute of Scientific and Technical Information of China (English)

    张晨曦; 邹早建; 王化明

    2012-01-01

    应用CFD软件对船舶通过桥区时的船体-桥墩水动力相互作用进行数值研究,通过使用动网格技术及UDF进行船舶运动过程中的网格更新,对船舶沿直线航线匀速驶经桥墩时的非定常粘性流场进行数值模拟,对桥墩诱导的船体非定常水动力进行数值预报,其中假设船舶航速很小,因而自由面兴波的影响可以忽略.以一艘集装箱船和一个垂直柱体桥墩模型为例,选取不同的船体-桥墩横向距离进行了数值计算,得到了作用在船体上的横向力和转首力矩时历曲线,分析了船体-桥墩横向距离对船体非定常水动力的影响.%A general-purpose CFD software is applied to study the hydrodynamic interaction between a bridge pier and a ship passing through the bridge area along a straight course at constant speed. By using the dynamic mesh technique and UDF to update the mesh, the unsteady viscous flow around the ship is numerically simulated and the unsteady hydrodynamic force on the hull induced by the pier is predicted. The ship speed is assumed to be small, so that the effect of free surface elevation is negligible. Numerical calculations are performed for a container ship and a vertical column as a simplified pier model at various distances between the ship and the pier. The time histories of the lateral force and yaw moment are obtained. The influence of the distance between the ship and the pier is analyzed.

  16. 兰新二线桥墩防风蚀措施及施工方法%Method and measure of wind-erosion prevention for bridge piers on Lanzhou-Xinjiang second railway

    Institute of Scientific and Technical Information of China (English)

    公彦良

    2016-01-01

    The second double-track rail line in Xinjiang of Lanzhou-Xinjiang railway crosses five strong wind areas. In order to solve the wind-erosion problem of bridge concrete piers,the measure of rigid-flexible combination of wind-erosion prevention was adopted by test. T he technology is a multistep process,using flexible polyester resin and steel wire webs to make a rigid-flexible composite on the surface of piers. It has high compressive and tensile strength,corrosion and erosion resistance,satisfactory anti-ultraviolet aging and durability,then contribute to wind-erosion prevention of bridge piers.%兰新铁路第二双线新疆段穿越新疆风力最强的五大风区,为了解决风蚀对兰新铁路桥墩混凝土结构的磨蚀问题,经过试验研究兰新铁路第二双线采取了刚柔结合的防风蚀措施。由柔性树脂胶加不锈钢丝网经过多道工序施工,在桥墩表面形成具有较高的压缩与拉伸强度、优良的耐风蚀和磨蚀性能、良好的耐紫外光老化性能及耐气候性的一种刚柔结合复合体,从而实现了桥墩抗风蚀的目标。

  17. 高瓦斯矿井瓦排巷墩柱式支护技术研究%Research on pier column supporting technology for gas discharge laneway of high gas mine

    Institute of Scientific and Technical Information of China (English)

    史红邈

    2016-01-01

    高瓦斯矿井综采工作面的瓦排巷二次支护采用木垛支护,存在承载力低、巷道变形严重、通风效果差等一系列问题,针对这些问题提出采用聚苯乙烯泡沫(EPS)混凝土墩柱式巷道支护技术,并在余吾煤业 N2202工作面的外错瓦排巷进行了工业现场试验。结果表明采用墩柱式支护的巷道顶底板移近量较小,巷道围岩变形小,支护效果明显强于木垛支护;墩柱式支护具有重量轻、承载力大、抗压强度大的特性,且其耐久性和耐燃性都强于木垛支护。介绍了墩柱的结构、材料、抗压性能及应用效果。%Currently,wood cribs were used for the secondary support of gas discharge lanew-ay in fully mechanized working face of high gas mine,but their bearing capacity was low,the roadway deformation was serious and the ventilation effect was bad��Aiming at these problems, the roadway supporting technology of concrete pier with expandable polystyrene foam was put forward,and the industrial field test was carried out in outward located gas discharge laneway of N2202 working face of Yuwu Coal Mine��The results showed that the displacement between roof and floor in pier column supporting roadway was less,the surrounding rock deformation was lit-tle,and the supporting effect was obviously better than wood crib supporting��The pier column supporting method had light weight,large bearing capacity and big compressive strength,and its durability and flame resistance were stronger than wood crib supporting��Besides,the structure, compressive property and application effects of pier column were introduced.

  18. Shaft Blasting Control Technology of Subway Near Bridge Pier%临近桥墩地铁竖井爆破控制技术

    Institute of Scientific and Technical Information of China (English)

    贾晓旭; 赵玉成

    2016-01-01

    taking project between Xia Yuan station ~Nan Gang station of Guangzhou metro line 13 first period en-gineering construction (fish bead to like neck ridge section ) as the background ,carried out blasting control design of the minimum distance of the shaft to the nearest building as the safety distance . The paper carried out blasting isolation de-sign mainly from the blasting parameters ,hole arrangement ,charge structure ,packing ,initiation and initiation network etc. At the same time ,grouting reinforcement on the basis of the nearest overpass bored pile so that reduced the founda-tion affected by vibration. Stetted the blasting safety protection system , prevent the surrounding buildings and vehicle pedestrian injuries from fly rock. Monitor the bridge pier vibration speed ,which is controlled within the 2cm/s during the construction period. It shows that the design of shock absorption and vibration reduction technology can meet the require-ments of design and engineering ,which provides a reference for similar blasting construction control technology .%以广州市轨道交通十三号线首期工程(鱼珠至象颈岭段)施工五标夏园站~南岗站区间临时竖井工程为背景,进行了以竖井到最近建筑物最小距离为安全控制距离的爆破控制设计。主要从爆破参数、布孔方式、装药结构、填塞方式、起爆方式和起爆网络等方面进行爆破减震设计,同时对最近立交桥钻孔灌注桩基础进行注浆加固,减小基础所受震动影响。设置爆破安全防护系统,防止爆破飞石对周边建筑物和车辆行人造成伤害。施工期间监测立交桥桥墩振速,均控制在允许振速范围内,表明此爆破减震设计以及采取的减震技术措施满足设计和工程实际要求,为类似爆破施工控制技术提供了可以借鉴的依据。

  19. 高压架空输电线路大跨越铁塔承台基础施工%On construction of crossing iron tower pier foundation of overhead ultra-high voltage power transmission lines

    Institute of Scientific and Technical Information of China (English)

    张俊平

    2011-01-01

    In the construction of the iron tower foundation power transmission lines,the paper indicates some features,including the weak geological conditions in the foundation,the tough tasks for the pier construction,and the long construction period,the paper introduces the difficulties and features of the crossing pier foundation construction of the power transmission lines,and adopts the effective measures in the cooling cycle water pipe,the temperature checking,and the surface maintenance of the concrete internal apparatus,and achieves satisfactory effects.%针对输电线路铁塔基础施工中,大量基础存在地质条件差、承台基础施工方量大、施工周期长等特点,详细介绍了输电线路大跨越大承台基础施工的难点、特点,在混凝土内部设置冷却循环水管及温度检测、表面养护等技术方面采取了有效的措施,并取得了满意的效果。

  20. Discussion on the Construction Technology of Variable Cross-section Hollow Thin-walled Pier%浅谈变截面空心薄壁方墩施工技术

    Institute of Scientific and Technical Information of China (English)

    陈显福

    2014-01-01

    Variable cross-section hol ow thin-walled pier has the obvious superiority and good economy, and can use less material to obtain larger sectional resistance moment which is often used by mountain bridge engineering. Taking the Yujiagou1# bridge as the example, this article introduces the construction technology of variable cross-section hol ow thin-wal ed pier, and provides reference for similar engineering construction.%变截面空心薄壁方墩具有明显的优越性和较好的经济性,可以用较少的材料获取较大的截面抵抗矩,这种技术常常被山区、深沟建桥的工程所采用。本文以余家沟1号大桥为例,介绍了变截面空心薄壁方墩施工技术,可为类似工程施工提供借鉴。

  1. Cyclic Testing on Rectangular Hollow Bridge Piers Under Axial Load and Biaxial Bending%双向压弯状态下矩形空心桥墩循环试验

    Institute of Scientific and Technical Information of China (English)

    韩强; 杜修力; 赵彦; 王利辉

    2013-01-01

    To investigate the seismic performance of reinforced concrete (RC) rectangular hollow bridge piers, cyclic testing on five well-confined specimens was performed under constant axial load and biaxial bending. The test variables included axial load ratio, longitudinal reinforcement ratio and lateral reinforcement ratio. The results show that these specimens are flexural failure modes; biaxial force and displacement hysteretic loops show significant stiffness and strength degradation, pinching effect and coupling interaction of the structural seismic resistances in both directions; the ductility coefficient, varying from 3. 5 to 5. 7, and the equivalent viscous damping ratio, varying from 0. 19 to 0. 26, can meet the requirements of seismic design; RC rectangular hollow bridge piers with configurations of lateral reinforcement subject to bi-directional earthquake components have excellent earthquake resistance, and can substitute for current hollow RC rectangular section configurations described in the Chinese Guideline for Seismic Design of Highway Bridges (JTG/T B02-01-2008); and the length of the plastic hinge region is found to approach one sixth of the the hollow RC rectangular bridge pier height for all specimen piers, which is far less than the currently specified minimum value in Chinese Guideline, so the length of plastic hinge region is more concentrated for RC rectangular hollow bridge piers.%为了研究水平双向地震作用下矩形空心桥墩的抗震性能,对约束良好但轴压比和纵向、横向配筋率不同的5个钢筋混凝土(RC)矩形空心桥墩在轴力和双向弯曲作用下的性能进行了循环试验研究.结果表明:试件破坏形态为桥墩底部形成塑性铰的弯曲形破坏,桥墩双向力-位移滞回曲线显示了双向压弯状态下RC矩形空心桥墩刚度和强度退化、捏拢效应以及2个水平方向抗震性能的相互影响;试件桥墩的延性系数在3.5~5.7之间,等效粘滞阻尼系数在0

  2. Fiber Section Based Flexure-Shear Coupling Analysis Model for RC Thin-Walled Piers%基于纤维截面的弯剪耦联薄壁墩柱模拟模型

    Institute of Scientific and Technical Information of China (English)

    李宁; 李忠献; 谢礼立

    2013-01-01

    Hollow section piers are often used in reinforced concrete(RC)bridges. It has been proved by earthquake damage investigation that the piers may perform flexure-shear coupling behavior,and eventually lead to pier failure and/or collapse. A fiber-section based RC pier simulation model considering flexure-shear coupling effect was pre-sented in this paper. By introducing bi-axial material constitutive relationship into the determination of fiber deforma-tion status,the sectional stiffness for beam column element can be obtained through the integration of fiber responses. Then the flexure-shear coupling Timoshenko beam element was implemented. The cyclic soften membrane model(CSMM)constitutive relationship was adopted for plane bi-axial RC components in the calculation of the nonlinear characteristic of fibers. The concrete uniaxial material model in CSMM was improved. By assuming the compatibility condition between each fiber and making use of the Newton iteration algorithm,the fiber and section responses were determined. At last,a scaled hollow section pier with quasi-static test result was compared with the numerical model,and the results show good agreement. The strength and stiffness degradation and pinching effect caused by flexure-shear coupling effect are captured by this model. And the fiber model shows sufficient accuracy and computational efficiency.%钢筋混凝土(RC)桥墩构件常采用空心截面,震害调查表明其失效模式多表现为弯剪耦联的非线性破坏。本文提出一种基于纤维截面、考虑弯剪耦联变形的混凝土墩柱模拟模型。首先将双轴材料本构引入纤维材料状态的计算,然后通过纤维截面积分,得到适用于 Timoshenko 梁柱单元的截面刚度矩阵,最终实现考虑弯剪耦联效应的梁柱单元。其中,双轴 RC 本构模型采用往复软化薄膜模型(CSMM),并对 CSMM 中单轴混凝土滞回模型进行修正。通过引入纤维

  3. Public Interest Energy Research (PIER) Program Development of a Computer-based Benchmarking and Analytical Tool. Benchmarking and Energy & Water Savings Tool in Dairy Plants (BEST-Dairy)

    Energy Technology Data Exchange (ETDEWEB)

    Xu, Tengfang [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Flapper, Joris [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Ke, Jing [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Kramer, Klaas [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Sathaye, Jayant [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2012-02-01

    water usage in individual dairy plants, augment benchmarking activities in the market places, and facilitate implementation of efficiency measures and strategies to save energy and water usage in the dairy industry. Industrial adoption of this emerging tool and technology in the market is expected to benefit dairy plants, which are important customers of California utilities. Further demonstration of this benchmarking tool is recommended, for facilitating its commercialization and expansion in functions of the tool. Wider use of this BEST-Dairy tool and its continuous expansion (in functionality) will help to reduce the actual consumption of energy and water in the dairy industry sector. The outcomes comply very well with the goals set by the AB 1250 for PIER program.

  4. Seismic performance of neotype column-slab high piers in double-column model of railway bridge%铁路桥梁新型柱板式高墩双柱模型的抗震性能

    Institute of Scientific and Technical Information of China (English)

    周雁群; 张晔芝; 叶梅新; 刘斌

    2013-01-01

    采用往复荷载下的钢筋和混凝土本构,用非线性有限元分析法研究铁路桥梁新型柱板式高墩双柱模型在低周往复荷载作用下的滞回特性、延性及耗能等抗震性能,研究墩柱截面形式、腹板厚度、墩柱配筋率对这些特性的影响.通过对4个缩尺模型的拟静力试验,进一步研究轴压比、腹板厚度和水平加载制度等对柱板式高墩破坏性状的影响.研究结果与数值模拟结果吻合较好,说明本文采用的分析方法结果可靠,新型柱板式高墩具有较好的抗震性能.%Hysteresis constitutive laws of concrete and steel reinforcement were adopted to study the hysteretic characteristics,ductility behavior,energy dissipation capacity and seismic performance of the late-model column-slab high piers in double-column model under cyclic loads.And the influences of column cross-section forms,wall slab thickness and reinforcement ratio of columns were also taken into account.Based on the pseudo-static test conducted on 4 reduced scale model,the effect of axial compression ratio,web thickness and horizontal loading system on the failure behavior of the column-slab high piers was further studied.The test results are agreed well with the numerical simulation results,which shows that the analysis method used in this work is reliable.The late-model Column-slab high pier has a better seismic performance.

  5. Risk Analysis of V-shaped Pier in Construction Process by Means of RBF Artificial Neural Network%基于RBF神经网络的V撑施工过程风险分析

    Institute of Scientific and Technical Information of China (English)

    王立峰; 肖子旺; 王子强

    2011-01-01

    By taking finite element analysis results as sample data, an invisible mapping relationship between basic variables and structural response is established and a risk quantitative analysis method of high-risk location identification during V-shaped pier construction, by using RBF (Radial Basis Function) artificial neuron network is presented. Through a numerical simulation based on the principle of Monte Carlo, structural failure probability of each checking section of Vshaped pier during construction is calculated. It is proved by engineering project and concluded that, the method of construction risk analyzing based on radial basis function neural network can be used as an efficient reliability analysis method. It is reasonable and applicable, which can provide a theoretical basis for risk-decision during V-shaped pier construction.%运用RBF神经网络(Radial Basis Function Neural Network)理论,分析了大夹角V撑施工期间最大风险因素可能发生的部位,并对V撑的结构失效风险性进行了定量分析.将有限元分析结果作为神经网络训练样本数据,利用径向基神经网络建立了基本变量和结构响应之间的隐性映射关系,根据蒙特卡洛原理进行模拟计算,最终得出V撑施工过程中各个危险截面出现结构失效的概率预估值.通过工程实例验证表明,基于径向基神经网络所建立的施工过程风险分析方法计算效率高,具有可行性和有效性,同时为V撑施工风险决策提供了理论依据.

  6. 超高墩、跨河边跨支架设计与施工技术%Design and Construction Technology of Cross Bracket with Super High Pier and Cross the River

    Institute of Scientific and Technical Information of China (English)

    占波

    2014-01-01

    本文主要介绍了沈丹客运专线连续梁边跨现浇段的设计与施工技术。通过理论设计计算与现场实践考验,该支架使用效果较好,对高墩支架施工具有参考价值。%This paper mainly introduces the design and constr- uction technology of continuous beam side span cast-in-place section of Shenyang-Dandong passenger dedicated line. Thro- ugh theoretical calculation and field test of the design practice, the bracket has good using effect, which has reference value for the construction of high pier bracket.

  7. 跨既有京九线门式墩支架施工方案设计%Construction Program Design of Portal Pier Bracket crossing the Beijing-Kowloon Line

    Institute of Scientific and Technical Information of China (English)

    李勇

    2012-01-01

    South Beijing EMU Depot construction goes across the Beijing-Kowloon Railway, Due to the small angle, the portal frame pier is used in the design. Reasonable construction program which can ensure safety is selected through com- parison of bailey beam, six-four-type military beam, D-type girder, I-beam and theoretical calculation.%北京南动车段工程施工时需要横跨京九铁路,因交角小,设计采用门式框架墩跨越。通过对贝雷梁、六四式军便梁、D型便梁、工字钢的结构形式比选和理论计算确定安全合理的施工方案。

  8. Construction craft of climb molding of variable cross-section high piers cantilever support%变截面高墩悬臂支架轻型爬模施工工艺

    Institute of Scientific and Technical Information of China (English)

    王利强

    2011-01-01

    Combining with piers climb molding construction practice of Hukou of the Yellow River large Bridge of Qing-Lan highway Lin-Ji section, summarized the construction technology of construction process, separately made introduction from the process characteristics, process principle, construction key points and other aspects, so as to accumulate relevant construction experience and guide engineering practice.%结合青兰高速临吉段壶口黄河特大桥的墩身爬模施工实践,对施工过程中的施工工艺做了总结,分别从工艺特点、工艺原理、施工要点等方面作了说明,以积累相关施工经验,指导工程实践。

  9. Floating Resistance Analysis for No .28 Pier Steel Caisson of Hutong Changjiang River Bridge%沪通长江大桥28号墩钢沉井浮运阻力分析

    Institute of Scientific and Technical Information of China (English)

    陈涛

    2015-01-01

    The main navigational channel bridge of Hutong Changjiang River Bridge is a steel truss girder cable‐stayed bridge with span arrangement of (142+462+1 092+462+142) m .The foundations of the pylon piers adopt caisson foundations ,among w hich the top plan dimension of steel caisson of pier No .28 is 86 .9 m by 58 .7 m ,and 44 m high .The steel caisson for the pier No .28 was fabricated in a dock and then transported to the bridge site by floating ,with a total floating weight of up to 14 500 t .To rationally allocate the floating tugboats and assure smooth floating ,the theoretical method ,numerical simulation method and physical model testing method were used to calculate the floating resistance of the steel caissons .Based on the comparative analy‐sis ,by modifying the head and end shapes of the boats ,the results gained by using the method presented in the Guidelines for Towage At Sea is approximate to those gained respectively by nu‐merical simulation and physical model testing ,w hich is proved applicable to the floating resistance calculation for the steel caisson of pier No .28 .It is proposed by calculation that the steel caissons have a draft of 8 m ,when the wind speed is at Grade 6 ,and the tugboat′s speed through water is 2 . 5 m/s ,the total resistance for a steel caisson is 2 167 kN under the condition of longitudinal to‐wing .The arrangement of the tugboats adopts the“7+1”mode ,namely one used as a backup tug‐boat ,the efficient output towing force is 3 060 kN ,and the maximum resistance of the towing is 2 326 .74 kN ,satisfying the floating requirements of the steel caisson .%沪通长江大桥主航道桥为(142+462+1092+462+142) m钢桁梁斜拉桥,桥塔墩基础采用沉井基础,其中28号墩钢沉井顶平面尺寸为86.9 m ×58.7 m ,高44 m。28号墩钢沉井在船坞内制造完后整体浮运至桥址处,浮运总重达14500 t。为合理地配置浮运拖轮,确保浮运顺利,采用理论方

  10. 缓冲器对钢筋混凝土桥墩撞击性能影响的试验研究%Experimental Research on Effect of Buffer on Impact Performance of Reinforced Concrete Pier

    Institute of Scientific and Technical Information of China (English)

    张南; 许琦; 刘钊; 臧华

    2009-01-01

    The dynamic performance test of reinforced concrete bridge pier model under lateral impact loading was conducted by falling-weight impact equipment to study the action of buffer installed on pier surface on the impact dynamic response of specimen. The buffer effects of different buffers were compared. The main factors that influence the crack propagation and failure pattern of pier under impact load were analyzed. The relation of impact energy with peak dynamic response of specimen and mean impact force was researched. The experimental result proves that the buffers installed can reduce the impact dynamic response of specimen greatly: the peak strain of compressive reinforcement can be decreased by 74.60%, the peak strain of compressive concrete can be decreased by 54.69%, the peak strain of tensile reinforcement can be decreased by 63.02%, the peak deflection at mid-span can be decreased by 57.73%, the anti-crack impact energy can be increased by 180%, the mean impact force of impact body can be decreased by 78.59%. The research result demonstrates that the buffer action of the reasonably designed buffer is effective enough to increase the anti-crash capacity of pier.%采用落锤冲击实验装置,进行钢筋混凝土桥墩模型在侧向撞击荷载下的动力性能试验,研究在桥墩模型表面设置缓冲器对试件撞击动力响应的影响.比较了不同缓冲器的缓冲效果,分析了影响桥墩模型冲击裂缝扩展和破坏模式的主要因素,研究了冲击能量和试件峰值动力响应及撞击体平均冲击力的关系.试验证明,所设置的缓冲器可以较大程度地减少构件的冲击动力响应,对撞击区受压钢筋峰值压应变可降低74.60%,受压混凝土峰值压应变可降低54.69%,受拉钢筋峰值拉应变可降低63.02%,跨中峰值位移可降低57.73%,抗开裂冲击能增加180%,撞击体的平均冲击力可降低78.59%.研究结果表明,经合理设计的缓冲器具有高效的缓冲作用,可用以提高桥墩的抗撞能力.

  11. 窗间墙锚固配筋砖混结构教学楼抗震性能试验研究%Experimental study on seismic performance of brick-concrete masonry school buildings with wall piers reinforced with anchored reinforcements

    Institute of Scientific and Technical Information of China (English)

    吴昊; 赵世春; 许浒; 张蓬勃; 吴刚

    2013-01-01

    Quasi-static tests on two half-scale two-story brick-concrete sub-structure models were carried out in order to improve the seismic performance of brick-concrete masonry school buildings. The wall piers between openings were partially reinforced with horizontal reinforcements that were reliably anchored using vertical reinforcements. The failure modes, load bearing capacity, deformability, rigidity degradation, ductility and hysteretic behavior of the two models, as well as failure modes of piers and failure mechanism of longitudinal walls were investigated. The results indicate that a story mechanism occurs in ordinary masonry model with the piers failing in shear failure. And the longitudinal walls exhibit strong spandrel-weak pier failure mechanism. However, partially reinforced wall piers are characterized by flexural failure with horizontal cracking in the mortar bed joints. Spandrels are severely damaged due to the formation of global failure mechanism. Strong pier-weak spandrel failure mechanism is guaranteed with uniform drift distribution. The level of damage, energy dissipation capacity and ductility of model are significantly improved.%为改善砖混结构教学楼的抗震性能,通过对其纵向窗间墙局部配筋并在墙体两端采用竖向钢筋进行锚固配筋,按照1/2的缩尺比例设计了2个砖混子结构模型.采用拟静力试验分别对普通窗间墙和配筋窗间墙的子结构模型的破坏模式、承载能力、变形能力、刚度退化、延性、耗能性能以及窗间墙的破坏模式和纵墙的破坏机制等进行了分析.结果表明:普通窗间墙模型表现为层间破坏机制,窗间墙发生剪切破坏,纵墙发生“强梁弱柱”式破坏;窗间墙局部配筋并进行锚固的模型发生整体型破坏,窗间墙弯曲破坏,纵墙的破坏机制具有“强柱弱梁”特征,层间变形均匀,模型的破坏形态、耗能能力和延性等均得到改善.

  12. 高墩大跨连续刚构桥的稳定性分析%Analysis of Stability of Long-span Continuous Rigid Frame Bridge with High Pier

    Institute of Scientific and Technical Information of China (English)

    王菲; 田山坡; 禚一

    2012-01-01

    Research purposes: The highway in western China or the remote region needs to cross over rivers and valleys and passes the regions with complex terrains due to the limitation of topographical condition . For this reason, the long -span continuous rigid frame bridge with high pier becomes more and more and the height of the bridge increases from several decameters to hundreds of meters. With increases of the pier height and the span length, the research on the stability of such kind of bridge is becoming more and more important. Research conclusions:Taking the long - span continuous rigid frame bridge with(90 + 168+90) m high pier in Shanxi province as the engineering background, the basic principle related to the structure stability is discussed and the stability of the high pier, the stability of the longest cantilever during construction and the stability in complete stage of the bridge are analyzed. From the calculation results it can be seen that for the bridge presented in this paper, the temperature effect has a little influence on the high pier stability, the wind load along the bridge axial direction has the most negative impact on the structure stability in the construction stage of the longest cantilever, and during the complete stage of the bridge, the lane load and the load of the crowded people set on the middle span has the most negative impact on the bridge stability. Furthermore, wind has a little influence and the influence of the temperature effect can be ignored in this stage. The calculation results also show this bridge has a good stability during its construction process and in the complete stage of bridge. The calculation and analysis processes presented in this paper can provide the reference to the similar works.%研究目的:西部地区及偏远地区受地形条件的限制,修建公路时常需要跨越河流、沟谷等复杂地形,因此高墩大跨连续刚沟桥的修建日益增多,其墩高也由原来的几十米提

  13. 黄冈公铁两用长江大桥主墩基础围堰施工技术%Construction Techniques of Cofferdams for Main Pier Foundations of Huanggang Changjiang River Rail-cum-Road Bridge

    Institute of Scientific and Technical Information of China (English)

    金红岩

    2012-01-01

    The main bridge of Huanggang Changjiang River Rail-cum-Road Bridge is a steel truvss girder cable-stayed bridge with double pylons and double cable planes and the foundations for the main piers of the bridge were constructed by the double-wall steel boxed cofferdams. The cofferdams were integrally manufactured and assembled on bank and by means of survey, the o-verall dimensions, pile locations and the locations and concentricity of the upper and lower guiding rings of the cofferdams were controlled in order to ensure that the deviations of the bored piles and pile caps of the main piers could comply with the relevant requirements in the standards after construction and to obtain the accuracy of positioning of the cofferdams according to the results of comprehensive analysis of the survey. The cofferdams were launched to the river by air bags by way of gradually adjusting the launching gradient from 1:30 to 1: 5 so as to ensure the launching speed and sliding distances of the cofferdams. After the cofferdams were launched to the river, they were floated to the pier sites, tugged by the strong house power tug boats and were positioned by the gravity anchors plus positioning barges in three stages of initially positioning, accurately positioning and system transformation. The final accuracy of positioning of the cofferdams in plan is 5 cm, the perpendicularity is within 1/1 000 and the perpendicularity of the steel casings is within 1/500, which all meet the requirements in the standards.%黄冈公铁两用长江大桥主桥为双塔双索面钢桁梁斜拉桥,主墩基础采用双壁钢吊箱围堰法施工.钢吊箱围堰在岸上整体拼装制造,通过测量控制围堰的轮廓尺寸,桩位,上、下导环的位置与同心度等,确保基础施工后主墩钻孔桩及承台施工偏差符合标准要求,并根据实测结果综合分析得出钢围堰的定位精度;采用气囊法下水,将下水坡度从1∶30逐渐调整为1∶5,保证了

  14. Measuring ice thickness around the curve and piers in the Yellow River with ground penetrating radar%利用探地雷达探测黄河弯道及桥墩周围冰层厚度

    Institute of Scientific and Technical Information of China (English)

    曹晓卫; 李春江; 颜小飞; 吴一帆; 李志军

    2016-01-01

    The freezing process of yellow river is a key point in the study of Yellow River ice flood prevention ,detection of the ice thickness around the curve and piers has important significance for prevention of the ice flood .The ground penetrating radar has the advantages of portable ,highly efficient ,continuous ,fast and real time for ice thickness detection .The frequency of the radar antenna determines the penetration depth and resolution of the radar wave .From the radar images ,the air‐water interface and ice‐water interface could be clearly identified .The accuracy of the measurement results was further improved by using ice thick‐ness data from the field drilling to calculate radar propagation velocity in the ice .The measurement results clearly showed that the distribution of ice thickness at the bend and pier was uneven .The ice on the north side of piers and the main channel of the curve was thicker .The ground penetrating radar with 200 Mhz antenna could penetrate the Yellow River ice ,and the radar ima‐ges could clearly show the ice‐water interface .This study could provide the basic data for the analysis of the yellow river ice freezing and melting process and governance of the ice jam in break‐up period .%黄河河道冻结结冰过程是黄河防凌汛研究的一个重点,进行弯道和桥墩周围冰层厚度的探测对防治冰凌灾害具有重要的意义。探地雷达对冰厚探测具有便携、高效、连续、快速、实时等优势。雷达天线的频率决定雷达波的穿透深度和分辨率。从雷达图像上可以清楚的识别空气‐冰界面和冰‐水界面。通过现场打孔测量冰厚数据反算雷达波在冰层中的传播速度进一步提高了测量结果的准确性。测量结果清楚的显示了弯道及桥墩处冰厚分布不均匀。桥墩北侧冰层较厚,弯道主河道处冰层较厚。200 M Hz天线的探地雷达可以穿透黄河冰层,雷达图像可以清楚地显示冰‐水

  15. 浅埋式桩基础钢筋混凝土拱桥桥墩防撞安全性评价与加固技术研究%Pier anti-collision safety evaluation of reinforced concrete arch bridge with shallow-buried piles and its strengthening technology research

    Institute of Scientific and Technical Information of China (English)

    吴超; 李德建; 宁夏元; 胡先春

    2013-01-01

    On the background of Yuan River bridge in Wuqiangxi,a method of pier anti-cillision safety evaluation,based on "Highway Bridge Code for Design",was put forward for reinforced concrete arch bridge with shallao-buried piles.On the basis of safety evaluation of Yuan River Bridge pier,a pier strengthening project of Yuan River Bridge in Wuqiangxi was proposed.In order to simulate the interaction of new and old concrete after strengthening of foundation,three-dimensional solid elements were adopted,where two situations of the interface between new and old concrete,i.e.,fully bonded or sliding were taken into account.The feasibility of this pier reinforcement project was studied,which can also provide reference for the similar bridge strengthening engineering.%以五强溪沅水大桥为工程背景,针对浅埋式桩基础钢筋混凝土拱桥,提出基于我国公路桥涵设计规范桥墩防撞安全性评价方法.通过对该桥的桥墩防撞安全性评价提出了相应的桥墩加固方案.采用三维实体单元来模拟基础加固后新老混凝土的共同作用,同时考虑新老混凝土接触面按完全粘结与滑动2种情况建立计算模型,对桥墩防撞加固方案的可行性进行了研究,亦可供同类桥梁加固参考.

  16. Seismic Damage Analysis of Reinforced Concrete Bridge Piers Based on Beam-Column Elements%基于梁柱单元的钢筋混凝土桥墩地震损伤分析

    Institute of Scientific and Technical Information of China (English)

    李正; 李忠献

    2011-01-01

    Faria-Oliver model is a simple and effective damage model for concrete.The uniaxial version of the FariaOliver damage model was proposed in the present paper.Meanwhile, the modification of Faria-Oliver model was introduced to describe the unilateral effect of concrete more properly.In addition, the material subroutines i.e.the modified Menegotto-Pinto model for reinforcing steel and the uniaxial modified Faria-Oliver model for concrete were implemented into VUMAT and the equivalent modeling strategy of fiber model was established within the FEA software ABAQUS.Furthermore, the numerical simulations of a cyclic loading test and a shaking table test of the reinforced concrete (RC) bridge piers were conducted.The results of the numerical simulations agreed well with the experimental ones.The present study indicates that the aforementioned uniaxial constitutive models and the equivalent modeling strategy of fiber model are effective and the seismic analysis of RC bridge piers using beam-column elements not only has a high computational efficiency but also provides information about seismic damage evolution.%Faria-Oliver模型是一个简单而有效的混凝土损伤模型.基于Faria-Oliver模型提出了混凝土单轴损伤模型,且加以修正以更好地模拟混凝土单边效应;在ABAQUS软件平台上,编制了含有钢筋修正Menegotto-Pinto模型和混凝土单轴修正Faria-Oliver损伤模型的用户材料子程序VUMAT,建立了纤维模型等效模拟方法;分别模拟了一钢筋混凝土桥墩试件的循环加载试验和一钢筋混凝土桥墩试件的振动台试验,模拟结果与试验结果基本吻合.研究表明:本文所给出的单轴本构模型及纤维模型等效模拟方法有效、适用;基于梁柱单元的钢筋混凝土桥墩地震损伤分析不仅计算效率高而且提供了地震损伤演化过程信息,具有较强的工程实用性.

  17. 地震作用下超高墩刚构桥倒塌易损性分析%Seismic Collapse Fragility Analysis of Rigid Frame Bridge with Super High Piers

    Institute of Scientific and Technical Information of China (English)

    范振华; 张谢东; 张行

    2013-01-01

    防止地震作用下结构倒塌是基于性能的地震工程的核心目标,目前基于弹塑性时程分析的倒塌易损性分析是结构抗倒塌能力评价最合理的方法.倒塌易损性分析的关键之一是建立合理的倒塌判别准则,文中提出了超高墩刚构桥地震倒塌破坏的判别准则.结合某工程实例,基于OpenSees建立了结构的非线性分析模型,对其进行了非线性地震时程分析,在此基础上建立了结构的易损性曲线,并讨论了混凝土保护层剥落和钢筋锈蚀等结构劣化对倒塌易损性的影响.%An important goal of performance-based seismic design is to prevent collapse of bridges.At present collapse fragility analysis based on the elasto-plastic time-history calculation is the most reasonable method to evaluate the collapse ability.The collapse criterion is the most important problem to be resolved.In this paper,a criterion of collapse for rigid frame bridge with high piers is proposed.An engineering example is demonstrated to study the collapse fragility of a rigid frame bridge with super high piers.The structure model is establish by OpenSees and the nonlinear time-history calculation is carried out to obtain the collapse fragility.Also the effect of deterioration,such as concrete spalling,the decreasing of strength and area of reinforcement,on the collapse fragility is discussed in detail.

  18. THE APPLICATION OF MASSING HANDLING THEORY FOR EVALUATION OF THE APPLICATION OF WHARVES AND LOADING FACILITIES IN THE MARITIME PORT

    Directory of Open Access Journals (Sweden)

    Zbigniew Matuszak

    2016-09-01

    Full Text Available This work presents the general characteristics of the port system. It defines sets and functions describing the structure and work of the port. Moreover, it characterizes foundations of the massive handling theory. It provides basic literature information about selected processes and models of the massive handling theory. On the example of a transportation company serving the loading on ships in the port of Szczecin, it shows the loading method. The material loading onto ships was the sodium water glass. There are observation results of operation times comprising the data available to determine parameters of the massive handling theory. Operations covered in the analysis include: the arrival of the ship at the port’s road, waiting for enter the port, passing through the fairway, waiting for loading, loading, determination of the cargo’s weight, preparation of documents and waiting for leaving the port. It presents critical remarks about possibilities of using the data obtained to describe loading cargo on a ship with the use of elements of the massive handling theory.

  19. 复杂环境下的桥墩基坑支护施工及监测%CONSTRUCTION AND MONITORING TECHNIQUE OF BRIDGE PIER FOUNDATION PIT SUPPORT UNDER COMPLEX CONDITIONS

    Institute of Scientific and Technical Information of China (English)

    姜志刚

    2012-01-01

    In Caofeidian Nachao River Bridge project, the foundation pit of main bridge pier base has a maximum depth of 13.5m and it is adjacent to railway and breakwater. During construction of foundation pit, the combined supporting system of steel sheet pile plus internal support is adopted, D-type beam is used to strengthen adjacent rail line, and pile foundation is selected as a base supporting the beam, so as to guarantee construction safety and safe operation of existing railway and to successfully complete the Nachao River Bridge project.%曹妃甸纳潮河大桥工程,主桥墩承台基坑最大深度达13.5m,且紧邻既有铁路线及防浪堤,承台基坑施工中采用钢板桩+内支撑组合支护体系,并采取D型便梁对紧邻的铁路线路进行加固,选择桩基作为便梁的支墩,达到确保施工安全和既有铁路安全运营,顺利完成纳潮河大桥建设.

  20. 粘钢加固损伤混凝土箱型桥墩的抗震性能Ⅱ:动力响应数值分析%Anti-seismic properties of damaged concrete bridge piers with hollow cross-section strengthened with adhering steel platesⅡ:numerical analysis on seismic dynamic responses

    Institute of Scientific and Technical Information of China (English)

    邓江东; 宗周红; 黎雅乐; 刘爱荣

    2013-01-01

    The flexibility method and the fiber model were used to numerically simulate the earth-quake dynamic response of the damaged concrete bridge piers with hollow cross-section strengthened with adhering steel plates.The performance index,such as the seismic forces at the piers bottom, pier top displacement and residual stiffness,were analyzed,and on the basis of model tests the seis-mic mechanics behaviors of the strengthened piers were comprehensively studied.The analysis re-sults show that the failure modes of the strengthened bridge piers under the earthquake actions are al-so displayed as the occurrences of plastic hinge in the superior margin of the steel plates,which coin-cides with the pier model testing results.The comparison of the seismic performances before and af-ter strengthening validates the effectiveness of the strengthening method with steel plates of making new plastic hinge.The effects of the initial damage degree,steel plate thickness and slenderness rati-os on the seismic safety degrees of the bridge piers are small.However,when the axial compression ratio is large,the seismic safety degrees decrease quickly.%针对具有初始弯曲损伤的粘钢加固混凝土箱型桥墩,采用柔度法和纤维模型,进行了系统的地震动力响应数值模拟计算,分析了地震作用下加固桥墩的地震剪力、墩顶位移、剩余刚度等性能指标,并在拟静力试验的基础上综合研究其抗震加固力学行为。分析结果表明,地震荷载作用下地震中桥墩仍然发生加固钢板上缘产生塑性铰的破坏模式,与拟静力试验结果一致。加固前后桥墩抗震性能的对比结果表明,经粘钢加固形成新塑性铰的加固方式可有效增强桥墩的抗震能力。初始损伤程度、加固钢板厚度和长细比等对加固桥墩抗震安全度的影响较小。大轴压情况下,安全度快速降低。

  1. 襄樊汉江三桥主墩承台大体积混凝土施工技术%Large Volume Concrete Construction Technology of Hanjiang the Third Bridge Main Pier Pile Cap in Xiangfan

    Institute of Scientific and Technical Information of China (English)

    吴刚; 蒲赞全; 钟启凯; 刘开扬

    2011-01-01

    Based on the large volume pile cap construction of Hanjiang the Third Bridge main pier in Xiangfan,the construction technology of the large volume pile cap is analyzed. , including cofferdam construction of steel sheet pile, bottom sealing of underwater concrete. A series of measures from concrete raw material to concrete pouring are taked to prevent exorbitant hydration temperature in mass concrete causing concrete crack, including mix design of low hydration heat concrete, temperature control calculation of concrete, field temperature control measures of mass concrete, temperature monitoring during construction. Thus,pile cap construction is completed successfully.%结合襄樊汉江三桥主墩大体积承台施工,分析了大体积承台施工技术,包括:钢板桩围堰施工,水下混凝土封底.为防止大体积混凝土在水化过程中结构内部产生过高的水化热温度,致使结构产生有害裂缝,从混凝土原材料到混凝土浇筑施工采取了一系列有效的技术控制措施,包括低水化热混凝土配合比设计、混凝土温控计算、大体积混凝土温度现场控制措施,以及施工过程中的温度监测,从而使得承台施工得以顺利完成.

  2. 钢筋混凝土桥墩加固与修复技术研究%Research on the Reinforcement and the Repair Techniques for RC Bridge Piers

    Institute of Scientific and Technical Information of China (English)

    曹兴; 魏洋; 李国芬; 吴刚; 吴智深

    2011-01-01

    Several traditional reinforcement techniques and the latest ones are researched and summarized for the conventional reinforcement and the seismic reinforcement and the repair in this paper, including increasing cross-section area, near-surface-mounted, external pre-stressing, steel jacket, FRP composites, exterior spiral and longitudinal rebar repaired with dog bone bars. The scheme principle, materials and applicable range of all different reinforcement technique are discussed and compared; the different techniques are applicable to different reinforcement demand for improving the bearing capacity of bridge piers, seismic strengthening and post-earthquake repair.%针对钢筋混凝土桥墩常规加固及抗震加固与修复,研究总结了几种国内外传统加固技术及最新加固技术,包括增大截面加固技术、嵌入加固技术、体外预应力加固技术、钢套管加固技术、FRP加固技术、绕丝加固技术及“狗骨式”筋修复纵筋技术等,对不同加固技术的方案原理、材料及适用范围进行了论述比较,不同的加固技术适用于桥墩承载力提高、抗震加固、震后修复等不同的加固需求.

  3. Study on Pier Supporting Technology of Gas Drainage Gateway of Full-mechanized Caving Mining Face%高瓦斯综放工作面瓦排巷墩柱支护技术研究

    Institute of Scientific and Technical Information of China (English)

    王吉生; 陈继刚; 王刚

    2015-01-01

    高瓦斯矿井综放工作面采用双“U ”型通风方式解除瓦斯的制约,但外圈巷道受动压影响变形大(底鼓量高达2.0 m),严重影响通风和行人的安全,一般采用木垛进行加强支护,效果不好。为此,提出了用高水速凝材料墩柱代替木垛进行加强支护。 FLAC3D数值模拟及现场矿压观测结果显示,墩柱支护优于木垛支护,并能有效地控制巷道围岩变形,平均每米巷道节约4243元,效益明显,为类似地质条件下巷道支护提供一种行之有效的方案。%The fully mechanized coal face of high-methane coal mine adopting double “U” type ventilation way remove the threat of methane.But the outer roadway affected by the dynamic pressure bringing about severe deformation ( the heaving floor reach up to 2.0 m), seriously affect the ventilation and pedestrians'safety.The general use of the crib timbering to reinforce supporting is unsatis-fied.Therefore, the reinforcement method of high-water and quick-setting pier instead of crib timbering is put forward.FLAC3D nu-merical simulation and field-observation results of rock pressure showed that the supporting can effectively control the deformation of surrounding rock of roadways and better than crib timbering, and save 4 243 yuan per meter roadway , benefit is obvious .This pro-vides an effective support scheme for roadway support in the similar geological conditions.

  4. 辅助墩对混合梁斜拉桥非线性静动力特性的影响%Impacts of auxiliary pier upon non-linear static and dynamic characteristics of single staved-cable bridge with composite beam

    Institute of Scientific and Technical Information of China (English)

    钟加峰

    2012-01-01

    利用有限元分析软件建立了混合梁独塔斜拉桥的空间模型,分析了混合梁独塔斜拉桥在有、无辅助墩情况下的非线性静动力特性的异同,讨论了在有、无辅助墩情况下对混合梁独塔斜拉桥非线性静动力特性的影响,得出了有指导意义的结论。%The paper establishes spatial model of single stayed-cable bridge with composite beam by using finite element analysis software, ana- lyzes similarities and differences of non-linear static and dynamic characteristics of single stayed-cable bridge with composite beam under the con- dition of with and without auxiliary pier, and discusses the impacts of within and without auxiliary pier upon non-linear dynamic and static char- acteristics of single stayed-cable bridge with composite beam, and finally draws some guiding conclusions.

  5. Seismic damage analysis of RC high bridge piers using a modified elastoplastic damage model%基于修正弹塑性损伤模型的钢筋混凝土高桥墩地震损伤分析

    Institute of Scientific and Technical Information of China (English)

    李正; 李忠献

    2011-01-01

    Faria-Oliver损伤本构模型是一种模型参数少、标定方便、计算效率较高的混凝土弹塑性损伤本构模型,但此模型对循环荷载作用下混凝土受拉行为的描述略有不足;针对此点提出了修正模型,并基于大型有限元软件ABAQUS编制了修正模型的用户材料子程序VUMAT,对钢筋混凝土高桥墩进行了地震损伤分析。分析结果表明:基于提出的修正Faria-Oliver损伤模型对高桥墩进行地震损伤分析,能有效识别高桥墩在地震作用下的典型损伤破坏过程。并进而发现高桥墩在地震作用下易发生多处损伤,且损伤位置以及损伤演化过程对地震动频谱%The Faria-Oliver damage model is a simple and efficient elasto-plastic damage constitutive model for concrete.However,there is a drawback about the description of the tensile behavior of concrete under cyclic loading.A modification is introduced,and a material subroutine is implemented into the finite element software ABAQUS.Seismic damage analysis of a RC high bridge pier is performed using the modified Faria-Oliver damage model.The results show that seismic damage analysis can effectively capture the typical damage evolution process of the high pier.Moreover,it is observed that for the high bridge pier,multiple damages tend to occur and the damage process is sensitive to the frequency of the earthquake.

  6. 可液化场地桥梁群桩-独柱墩结构地震反应振动台试验研究%Shaking table tests for seismic response of pile-supported bridge structure with single-column pier in liquefiable ground

    Institute of Scientific and Technical Information of China (English)

    唐亮; 凌贤长; 徐鹏举; 高霞; 王东升

    2009-01-01

    针对两种土层结构的可液化场地条件,采用2×2低承台群桩一独柱墩结构形式,完成了两个试验体的群桩-独柱墩结构地震反应振动台试验,很好地再现了自然地震触发场地液化及结构反应的各种宏观现象.结果表明,桩的最大加速度反应位置与地层结构关系密切且随场地液化发展而不断变化;低承台条件下,三层土场地较二层土场地对墩顶的加速度反应放大作用更显著;场地液化过程中,承台附近或液化与非液化土层分界处桩发生最大或较大动应变;低承台下,二层土场地中柱墩反应较小、桩反应较强,三层土场地中柱墩反应较强.%Two shaking table tests for seismic pile-soil-bridge interaction in liquefiable ground, with a low-cap 4-pile group and two typical soil profiles, were performed. The tests reproduced the macroscopic phenomena of soil liquefaction and seismic response of the structures in liquefiable ground. It is observed that the portions of the piles with maximum acceleration were in close contact with the soil layers and varied with the development of soil liquefaction. For the low-cap pile-supported bridge structure, the ground with three soil layers exerted more significant amplification effect on the acceleration response of the pier top than the ground with two soil layers. During soil liquefaction, the strains of the piles near the cap and the soil interface between liquefied soil and non-liquefied soil were comparatively greater than those at other positions. For the low-cap pile groups, the response of the pier was comparatively less significant and the pile strongly responded to the input motion of the ground with two soil layers, while the response of the pier was more significant under input motion of the ground with three soil layers.

  7. Study on the seismic flexural-shear damage mechanisms and rapid repair techniques for earthquake damaged bridge piers%钢筋混凝土桥墩地震弯剪破坏机理与震后快速修复技术研究

    Institute of Scientific and Technical Information of China (English)

    司炳君; 孙治国; 杜修力; 王东升; 黄照南

    2011-01-01

    Quasi-static tests were conducted to study the seismic flexural-shear damage mechanisms and rapid repair techniques for earthquake damaged bridge piers.Six original pier specimens of circular cross sections were severely damaged under cyclic lateral force and constant axial load,and the damaged specimens were subsequently repaired using high-fluidity concrete with high early-strength and Carbon Fiber-Reinforced Polymer(CFRP),and then put into test again within a week.The failure pattern,strength,ductility and dissipated energy parameters and stiffness degradation of the repaired specimens were compared with the original ones.It is founded that the ultimate performance of bridge piers designed according to current seismic design codes of JTG/T B02-01—2008 and Caltrans with minimum confining reinforcement ratios may be dominated by shear failure in the plastic hinge zones.The repaired specimens show lower initial stiffness and larger yield displacement as a result of the pre-existing damage.But the failure for all of the repaired specimens was due to flexure,with higher strength,larger or the same ductility and dissipated energy parameters and recovered stiffness,which demonstrated the effectiveness of the proposed repair techniques.%为研究钢筋混凝土桥墩的地震弯剪破坏机理与震后快速修复技术,首先进行了6个圆形截面桥墩试件的拟静力试验,试件均发生严重弯剪破坏,然后利用高流动性早强混凝土和CFRP布对其进行快速修复并在1周内重新进行加载试验,将原桥墩与修复后试件的破坏形态、承载力、延性与耗能能力、刚度退化等进行了对比分析。研究表明:塑性铰区配箍满足我国《公路桥梁抗震设计细则》(JTG/T B02-01—2008)及美国Caltrans规范要求的钢筋混凝土桥墩试件,最终仍有可能因塑性铰区抗剪强度不足发生弯剪破坏。由于初始损伤的存在,震后修复

  8. NSGA - II Optimization on Life-cycle Seismic Design of Single Circular Reinforced Concrete Bridge Piers%基于 NSGA - II 的规则桥梁圆形单柱 RC 桥墩全寿命造价优化设计

    Institute of Scientific and Technical Information of China (English)

    柳春光; 张士博; 柳英洲

    2015-01-01

    以基于抗震性能设计基本原则-“投资-效益”准则为理论支撑,提出了将多目标遗传算法与延性抗震设计、地震风险相结合的抗震结构集成全寿命抗震优化设计的新方法,建立了规则桥梁圆形单柱 RC 桥墩多目标全寿命造价优化设计的通用框架。并应用 NSGA - II 建立了以圆形单柱 RC 桥墩截面直径、纵筋和箍筋的配筋率为决策变量,以初始造价和地震损失期望为多目标的全寿命造价优化设计模型。计算结果表明:RC 桥墩多目标全寿命造价优化设计为投资者提供了更加灵活的初始投资的选择空间,同时 NSGA - II 也为该优化设计提供了一个较好的算法支持。%Based on the cost-effectiveness criterion ,a fundamental principle for performance-based seismic design ,a new method for optimizing total life-cycle seismic design of bridge piers was put forward with the consideration of multi -objec-tive genetic algorithm ,seismic ductility design and earthquake risks .According to which ,the general framework of multi-objective total life-cycle cost optimization design for regular reinforced concrete single circular bridge piers was estab -lished .On the platform of NSGA - II ,a total life-cycle cost optimization model of this pier was constructed with the deci -sion variable as section diameter ;the ratios of the longitudinal reinforcement ,the lateral reinforcement ,the initial cost of the structure and the expectation of earthquake loss as multiple objectives .The calculation results indicate that this method can provide the investors with a more flexible initial investment options ,meanwhile NSGA - II can also equip the designers with a better algorithm support for optimization design .

  9. Nonlinear Seismic Response Characteristics of Bridge with Double-column High-rise Piers Considering Pounding Effect%考虑碰撞效应的双柱式高墩桥梁非线性地震反应特性研究

    Institute of Scientific and Technical Information of China (English)

    高玉峰; 蒲黔辉; 李晓斌

    2011-01-01

    以西南山区线路中常用的双柱式高墩桥梁为研究对象,建立典型桥跨结构的空间动力分析模型,采用非线性动力时程分析方法,详细研究了考虑地震碰撞效应时桥梁结构的地震响应特性,并探讨了接触单元刚度取值、间隙宽度、桥台刚度以及支座滑动性能等非线性边界条件的影响.结果表明:梁间碰撞作用主要发生在近桥台伸缩缝处,碰撞作用减小桥墩的地震响应,同时在梁体中产生较大的短时加速度脉冲效应;考虑桥台的纵向约束作用将使得梁间碰撞效应增强;对于通常设计采用的间隙宽度范围,强震作用时碰撞现象会不可避免地发生;支座滑动性能对桥墩的地震响应起到隔震的作用,考虑支座滑动性能后梁间碰撞次数减少;各种非线性边界条件因素的综合作用使得桥跨结构的地震响应变得较为复杂,为获得结构真实响应结果应该合理考虑这些因素的影响.%Based on the double-column highway bridges with high-rise piers in southwest mountain area, the spatial dynamic analysis models of representative bridge span were established. The seismic response characteristics of the bridge considering the pounding effect were studied in detail by using nonlinear dynamic time history analysis method. The influence of some nonlinear boundary conditions, including value of contact element stiffness, gap width, abutment stiffness and sliding performance of bearings, were discussed. The results indicate that ( 1 ) the seismic pounding effect between adjacent beams occurs mainly in the expansion joint near the bridge abutments, the pounding reduces the seismic response of piers but generates high magnitude and short duration acceleration pluses in the beams; (2) the pounding effect between adjacent beams will be enhanced when the longitudinal constraint effect of abutments is considered; (3) for the range of gap width usually· adoptod in design, the pounding

  10. Effects of Multiple-mode Vibration on Elastic-plastic Seismic Responses of High Flexible Piers of Railway Bridge%多振型效应对铁路高柔桥墩弹塑性地震响应的影响

    Institute of Scientific and Technical Information of China (English)

    李宇; 朱晞; 杨庆山

    2011-01-01

    Nonlinear static analysis considering multiple-mode effects in FEMA356 and ATC-40 is improved. Basing on the capacity spectrum method (CSM) of soil-structure interaction effects (SSI) in FEMA440, taking the piers of one extra-long bridge of a railway line in southwest of China as the object of research and choosing eighty strong ground motion records in agreement with stipulations of site H specified in the Code of Seismic Design for Railway Engineering, the ductility and performance points of high flexible piers are solved by using the modified acceleration-displacement response spectrum (MADRS) locus of possible performance points introduced in FEMA440. From nonlinear time history analyses, the rationality and feasibility of the improved nonlinear static analysis method considering multiple-mode effects is verified by comparing with the average of seismic responses. The practicability of CSM considering SSI for railway bridge aseismic assessment is also verified.%对FEMA356和ATC-40中考虑多自度效应的非线性静力分析法进行改进.并在FEMA440考虑土-结构相互作用能力谱法基础上,以我国西南某铁路特大桥桥墩为研究对象,选取与我国《铁路工程抗震规范》Ⅱ类场地相符合的80条强震记录,利用FEMA440性能点轨迹法求解高柔桥墩结构延性及性能点;并与80条强震记录非线性时程分析计算结果平均值进行比较.验证本文改进的非线性静力分析法反映高柔桥墩多自度效应的合理性,及考虑土-结构相互作用能力谱法在铁路桥梁工程中应用的可行性.

  11. 基于支持向量机的高墩大跨桥梁体系可靠度计算%Computation of Structural System Reliability of High-Rise Pier and Long Span Bridge Based on Support Vector Machine

    Institute of Scientific and Technical Information of China (English)

    张士福; 康海贵; 郑元勋; 李玉刚

    2012-01-01

    为解决高墩大跨桥梁结构体系可靠度求解过程中失效模式复杂、极限状态方程无法显式表达等问题,提出一种基于支持向量机(SVM)分类技术的体系可靠度计算方法.该方法采用拉丁超立方抽样法产生样本库,通过重复筛选构造一个精确的SVM分类器函数(而不是构造功能函数本身的响应面函数),然后采用蒙特卡罗法进行数值模拟计算体系失效概率.以济邵高速公路逢石河特大桥为例验证了采用该方法计算高墩大跨桥梁体系可靠度的实用性,计算结果表明该桥体系可靠度满足设计要求.%To cope with the problems that the failure modes in the solving process of structural system reliability of high-rise pier and long span bridge are complicated and the limit state e-quations can not be displayed and expressed, a method for computation of the system reliability based on the support vector machine (SVM) classification technique is proposed. The proposed method can generalize the sample bank, using the Latin hypercube sampling method and can construct a precise SVM classifier function (rather than the response surface function of the structure function itself) by repeated screening and the numerical simulation and computation of the system failure probability are accordingly carried out, using the Monte Carlo method. By way of example of the Fengshi River Bridge on Jiyuan-Shaoyuan Expressway, the practicability of the method for computation of the system reliability of the high-rise pier and long span bridge is verified and the results of the computation prove that the system reliability of the bridge can meet the design requirements

  12. Influence analysis of the approach bridges on the earthquake response of V-shaped piers of continuous rigid-frame bridge%引桥对V形墩连续刚构桥地震响应的影响分析

    Institute of Scientific and Technical Information of China (English)

    谢修辞; 徐永路

    2016-01-01

    With the background of Hainan Province Dinghai Bridge,time history analysis method was used on the V-shaped piers of continuous rigid-frame main bridge,main bridge which anti-seismic bearing and entire bridge without anti-seismic bearing. The result indicated that ap-proach bridges is more effective on shock absorption than anti-seismic bearing. So could make some detailed designs on approach bridges to in-crease the seismic capability of rigid frame bridge.%以海南省定海大桥为工程背景,采用时程分析法,对 V 形墩连续刚构主桥、仅使用抗震支座的主桥和联入引桥的全桥三种情况分别进行时程分析,结果表明,引桥对 V 形墩连续刚构桥的影响大于抗震支座,即可以在引桥上做精细化设计来提升刚构桥的抗震能力。

  13. Riverbed Pre-Protection Techniques for Main Pier No .29 of Main Ship Channel Bridge of Hutong Changjiang River Bridge%沪通长江大桥主航道桥 29 号主墩河床预防护技术

    Institute of Scientific and Technical Information of China (English)

    崔一兵

    2015-01-01

    The main ship channel bridge of the Hutong Changjiang River Bridge is a double-py-lon continuous steel truss girder cable-stayed bridge with span arrangement (140+462+1 092+462+140) m .The foundation for the main pier No .29 of the bridge is the open caisson ,the di-mensions of the caisson top are 86 .9 m × 58 .7 m and the caisson height is 115 m .Because the silty sand stratum at the pier is deep and the stratum is prone to scouring under the action of water cur-rent ,the local scouring of the riverbed at the pier in the process of landing the caisson onto the ri-verbed can be severe .To ensure that the caisson could be stably and safely landed onto the river-bed ,the riverbed was hence pre-protected .The pre-protection system for the riverbed included the inverted filter layer ,protection layer and prism structure ,respectively composed of the 1~6 mm , 3~10 cm and 6~10 cm grading crushed stones and the riprapping depth is respectively 1 ,1 and 2 m ,of which the riprapping range of the protection layer extended 25 m outwards from the caisson wall .At the time the riverbed was pre-protected by the riprapping ,the virtual grids were deter-mined according to the riprapping tests ,the positioning barge ,grab barge ,material hoppers and ducts were all used to riprap at the fixed points .The inverted filter layer was riprapped first ,the protection lay was then and the prism structure was finally .With the application of the riverbed pre-protection technique ,the protection effect of the riverbed at the pier was evident and after the caisson was landed onto the riverbed and positioned ,the plan position and posture of the caisson almost had no changes .%沪通长江大桥主航道桥为(140+462+1 092+462+140 ) m双塔连续钢桁梁斜拉桥 , 29号主墩采用沉井基础 ,沉井顶平面尺寸为86 .9 m × 58 .7 m、高115 m.由于29号主墩位处粉砂层较厚 ,水流作用下这部分泥砂易被冲刷 ,对沉井着床过程中的局部冲刷大 ,为

  14. 工具式围堰在桥梁墩柱维修中的应用%Operation Method of the Tool-typed Recycling Double Wall Steel Cofferdam in Wate-pier Reinforcement Engineering in the Spring Tide of Poor Water

    Institute of Scientific and Technical Information of China (English)

    刘昂; 吴中鑫; 朱慈祥

    2015-01-01

    In this paper,in the engineering background of detection and reinforcement project of the No.14~18 Pier of a bridge,the construction method of the Tool-Typed Double Wall Steel Cofferdam in the bridge of low clearance flyovers which is removable and recyclable in the spring tide of poor wa-ter is introduced.In the method,the factors,the spring tide of poor water,low clearance flyovers, and details of design and fabrication of the steel cofferdams are considered.An application example shows that the method can reduce construction time,cost,energy conservation and environmental protection..%以某桥梁15~18号桥墩检测加固项目为工程背景,介绍了某桥梁高潮差低净空下的工具式可拆卸循环利用双壁钢围堰使用方法,该工具式可拆卸循环利用双壁钢围堰的施工考虑了涨落潮变化、桥下净空较小等环境因素,以及围堰及辅助措施的设计、制作安装。应用证明,该方法具有减少施工工期、降低成本、节能环保等特点。

  15. Coastal structural remains on the east coast of India: Evidence of maritime activities and their significance

    Digital Repository Service at National Institute of Oceanography (India)

    Tripati, S.

    such as dockyards, jetties, lighthouses, wharves and warehouses related to maritime activities of India. Lighthouses, warehouses and wharves have been located at Poompuhar, Arikamedu, Dharanikota, Chilika and Mahabalipuram on the east coast of India. Similarly...

  16. 安庆长江铁路大桥主墩在深水无覆盖层条件下的围堰定位技术%Positioning Techniques for Steel Cofferdam of Main Pier of Anqing Changjiang River Railway Bridge Under Condition of Deepwater and Geology Without Overburden

    Institute of Scientific and Technical Information of China (English)

    郑大超; 田继开

    2012-01-01

    安庆长江铁路大桥主桥为主跨580 m的多跨连续钢桁梁斜拉桥,该桥3号墩基础采用圆形双壁钢围堰施工,围堰定位采用无导向船重锚锚碇定位系统.针对3号墩基础深水无覆盖层地质条件下围堰施工,为实现围堰的精确定位,从钢筋混凝土梳齿锚、收锚平台及转向马口3个方面进行围堰锚碇定位系统研究.围堰部分锚碇采用钢筋混凝土梳齿锚取代铁锚,钢筋混凝土梳齿锚由混凝土实体、起吊座、锚座、梳齿组成;围堰部分边锚通过新型转向马口转向至前、后定位船收锚;锚绳转向采用新型马口结构.%The main bridge of Anqing Changjiang River Railway Bridge is a multi-span continuous steel truss girder cable-stayed bridge with a main span 580 m and the foundation for the Pier No. 3 of the bridge was constructed by the circular double-wall steel boxed cofferdam that was positioned by the heavy anchor anchorage system without utilizing the guiding barge. In the light of the construction of the cofferdam under the condition of deepwater and geology without o-verburden and to achieve the purpose of accurate positioning of the cofferdam, the positioning system for the cofferdam was systematically studied from three aspects of the reinforced concrete (RC) comb anchors, anchor weighing platform and steering fair leaders. According to the study, it was determined that for part of the anchors of the cofferdam, the iron anchors should be replaced with the RC comb anchors and a comb anchor of such type was composed of the concrete body, lifting base, anchor base and comb teeth. Part of the side anchors of the cofferdam were steered to the front and rear positioning barges via the new type of the steering fair leaders and were weighed on the barges there and for steering of the anchor ropes, the new type of the steering fair leaders were provided also.

  17. Application of Bridge Pier Scour Equations for Large Woody Vegetation

    Science.gov (United States)

    2016-07-01

    evaluation of these equations over the years has revealed that they typically over-predict the actual observed scour (Ettema et al. 2011; Yuill, in...venturi meter. The tailwater downstream of the model was controlled by an adjustable tailgate. Steel rails set to grade provided reference planes. Water... steel cylinders being tested and for removal of test-bed materials. Phase I of testing consisted of a No. 67 gravel test bed. The gravel had a D50 of

  18. Pier Luigi Nervi. Palacio de deportes, en Roma

    Directory of Open Access Journals (Sweden)

    U., J. J.

    1958-02-01

    Full Text Available El nuevo palacio de los deportes que se ha construido en Roma, Vía Tiziano, tiene una estructura resistente de hormigón armado; sus principales elementos han sido prefabricados y se ha cubierto con un casquete de forma esférica. Esta obra, de rico sabor arquitectónico, en la que se ha acentuado una vez más la necesaria identificación estructural y arquitectónica, tiene por objeto hacer frente a las necesidades que crea la proximidad de, la XVII Olimpiada, que ha de efectuarse en Roma.

  19. Ship collisions against wind turbines, quays and bridge piers

    DEFF Research Database (Denmark)

    Pedersen, Preben Terndrup

    2013-01-01

    expressions are derived for the maximum values of collision forces and energy released for local crushing. The expressions are derived for arbitrary impact locations and they are well suited for application in risk analysis procedures. Numerical results show that for piled towers the structural flexibility...

  20. Pier Paolo Giglioli: lettera di rifiuto all’Anvur

    Directory of Open Access Journals (Sweden)

    Maria Chiara Pievatolo

    2012-05-01

    Full Text Available E’ appena stata resa pubblica su Roars, qui. Chi, per avventura, non conoscesse il suo autore può farsi un’idea di chi sia a partire da qui. Il testo è circolato in via informale ed è probabilmente già noto a chi appartiene alla comunità accademica. Chi però non l’avesse ancora letto è invitato a farlo – [...

  1. Conceptual Designs for Berthing Pier Galleries and Deck Lighting.

    Science.gov (United States)

    1983-06-01

    CONCEI’FS I Ie ~ L ),I Ic L’ Outs(’I it S f0 to - h~o 1 11 t ’ p) i lI-s Hiypo r t ed )i p L, r :1i,1 1 0 1 t Ilt’ 1’jIL i llj, p1it’ tnt’ il is d tipo )01...le-stipportedI p)ieur alI teri te0. 2.4.2 F lo~jn _IIiY The gal I elC -v sct i On -1cci t fo0r t 11 flIoa t i ut ,p pie r i s s iila’Ir t o the con

  2. CERTS Microgrid Laboratory Test Bed - PIER Final Project Report

    Energy Technology Data Exchange (ETDEWEB)

    Eto, Joseph H.; Eto, Joseph H.; Lasseter, Robert; Schenkman, Ben; Klapp, Dave; Linton, Ed; Hurtado, Hector; Roy, Jean; Lewis, Nancy Jo; Stevens, John; Volkommer, Harry

    2008-07-25

    The objective of the CERTS Microgrid Laboratory Test Bed project was to enhance the ease of integrating small energy sources into a microgrid. The project accomplished this objective by developing and demonstrating three advanced techniques, collectively referred to as the CERTS Microgrid concept, that significantly reduce the level of custom field engineering needed to operate microgrids consisting of small generating sources. The techniques comprising the CERTS Microgrid concept are: 1) a method for effecting automatic and seamless transitions between grid-connected and islanded modes of operation; 2) an approach to electrical protection within the microgrid that does not depend on high fault currents; and 3) a method for microgrid control that achieves voltage and frequency stability under islanded conditions without requiring high-speed communications. The techniques were demonstrated at a full-scale test bed built near Columbus, Ohio and operated by American Electric Power. The testing fully confirmed earlier research that had been conducted initially through analytical simulations, then through laboratory emulations, and finally through factory acceptance testing of individual microgrid components. The islanding and resychronization method met all Institute of Electrical and Electronics Engineers 1547 and power quality requirements. The electrical protections system was able to distinguish between normal and faulted operation. The controls were found to be robust and under all conditions, including difficult motor starts. The results from these test are expected to lead to additional testing of enhancements to the basic techniques at the test bed to improve the business case for microgrid technologies, as well to field demonstrations involving microgrids that involve one or mroe of the CERTS Microgrid concepts.

  3. 安庆长江铁路大桥3号墩围堰锚碇系统设计与施工%Design and Construction of Mooring System for Cofferdam of Pylon Pier No.3 of Anqing Changjiang River Railway Bridge

    Institute of Scientific and Technical Information of China (English)

    刘爱林; 农代培

    2011-01-01

    The bored pile foundation of pylon pier No. 3 of Anqing Changjiang River Railway Bridge was constructed with the circular double-wall steel boxed cofferdam. To realize the accurate positioning and construction safety of the cofferdam, through comparison of the different schemes, it was decided that the cofferdam would be positioned by the mooring system from the front and rear positioning barges without utilizing guiding barge. The types and numbers of the mooring anchors, the mooring ropes and positioning barges were determined according to the calculation of the total tensile force of the main anchors and the force of each anchor after sinking thecofferdam in place. In the design, the problem of steering and reeling of the large diameter mooring ropes was tackled by the tie points on the sides of the cofferdam and by the one-way or multi-way rolling fairleaders set at the top of the cofferdam. The side anchors were heaved by the winches installed on the anchor weighing platforms on the front and rear positioning barges and at the top of the cofferdam and the anchors could be therefore cast, weighed and changed. The side anchors on the shore and ground anchors were embedded in the excavated pits and the anchors under water were cast by the 240 t barge. The mooring ropes were timely tied, untied, tightened and the anchors were adjusted in pace of sinking of the cofferdam to finally complete the construction of the mooring system.%安庆长江铁路大桥3号桥塔墩钻孔桩基础采用圆形双壁钢套箱围堰施工.为实现围堰的精确定位和施工安全,经方案比较采用无导向船的前、后定位船锚碇系统定位方案,锚型与数量、锚绳及定位船通过计算围堰下沉到位后主锚总拉力及各锚碇受力确定.设计中通过在围堰侧面的边锚拉结点及围堰顶面设置单向或多向转动的辊轴式马口解决大直径锚绳转向和收放难题;通过在前、后定位船和围堰顶的收锚平台上安装

  4. Control Technique for Accurate Landing of Caisson of Pier No.3 of Tongling Changjiang River Bridge on Hefei-Fuzhou Railway onto Riverbed%合福铁路铜陵长江大桥3号墩沉井精确着床控制技术

    Institute of Scientific and Technical Information of China (English)

    覃勇刚; 涂满明; 王东辉

    2013-01-01

    The main bridge of Tongling Changjiang River Bridge on Hefei-Fuzhou Railway is a steel truss girder cable-stayed bridge with three cable planes and with a main span 630 m. The Pier No. 3 of the north pylon of the bridge is supported on the foundation of round-ended caisson that was constructed by the scheme of "two-time positioning and quick landing of the caisson onto the riverbed by water pumping". To make sure that the caisson could be accurately landed onto the riverbed, the spatial model for the caisson and its tie anchor rope system was set up by the finite element software MIDAS 2006, the process of the landing of the caisson was simulated, the changing laws of the caisson offsetting and anchor rope forces in the process of the landing were analyzed and it was determined that the distance between the bottom of the caisson and the riverbed should be kept 2 m at the time the caisson was being positioned. To minimize the influences of the scouring, soil non-uniformity of the riverbed, waves and vortex vibration on the accurate landing of the caisson onto the riverbed, the measures of pumping water into the caisson for quick landing of the caisson, rectifying the offsetting of the caisson by winching the anchors, increasing the numbers and rigidity of the side anchors of the caisson and increasing the mass and damping of the caisson itself were respectively taken.%合福铁路铜陵长江大桥主桥为主跨630 m的三索面钢桁梁斜拉桥,其北桥塔3号墩采用圆端形沉井基础,沉井着床采用“二次定位、注水快速着床”的方案.为使沉井精确着床,采用MIDAS 2006有限元软件建立沉井和拉缆系统空间模型,模拟沉井着床过程,分析沉井着床过程中的偏移及拉缆索力变化规律,确定定位时沉井底与河床的距离为2 m.为减小冲刷、河床平面土质分布不均、波浪和涡激振动等对沉井精确着床的影响,分别采取了注水快速着床、绞锚纠偏回位、增加沉井边

  5. 75 FR 71638 - Safety Zone; Fleet Week Maritime Festival, Pier 66, Elliot Bay, Seattle, WA

    Science.gov (United States)

    2010-11-24

    ... opportunity to comment was not posted in the Local Notice to Mariners or on the District Thirteen Webpage... standards (e.g., specifications of materials, performance, design, or operation; test methods;...

  6. Pier J3 CUB模型像真机的制作(上)

    Institute of Scientific and Technical Information of China (English)

    张宝健

    2010-01-01

    Piper J3 CUB模型像真练习机以其优荚的外形和优雅的飞行姿态.受到众多飞友尤其是初学者的喜爱。下面.就与大家一起制作一架Piper J3 CUB电动模型飞机。

  7. F00389: NOS Hydrographic Survey , Solomons Island Naval Annex Pier, Maryland, 1993-07-20

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The National Oceanic and Atmospheric Administration (NOAA) has the statutory mandate to collect hydrographic data in support of nautical chart compilation for safe...

  8. Bridge pier foundation evaluation using cross-hole seismic tomographic imaging

    Science.gov (United States)

    Butchibabu, B.; Sandeep, N.; Sivaram, Y. V.; Jha, P. C.; Khan, P. K.

    2017-09-01

    An ambitious project connecting Jammu and Srinagar through a railway link in tectonically active and geologically complex Himalayan Mountain terrain is under progress. Under this project, the world's highest (359 m) railway arch-bridge is under construction across the River Chenab in the northern territory of India. This mega engineering structure has a two-fold ribbed arch design, comprising of steel girders. During the excavation for one of the concrete pillars on the right abutment, wide open joints and weak/shear zones were noticed. The width of these joints varies from 30 to 50 cm, trending along N170° with a dip of 65°. The foundation area of this pillar is 13 m × 24 m and on the cut slopes of the right bank of Chenab River. These exposed joints and weak zones were treated with consolidation grouting to strengthen the foundation area. To delineate the extent of these joints and weak zones below the foundation level, seismic tomography was carried out in five boreholes drilled for this purpose to cover the 300 sq-m area. The results of cross-hole seismic tomography reveals the presence of three low velocity (≤ 2600 m/s) anomalous zones below the foundation area. This also ascertained the efficacy of grouting in consolidating the joints and weak zones. Later, rock-mass quality (Q) was determined based on the relationship between the P-wave velocity and the Q-value (Barton, 2002) to infer the support system for the slope stabilization below the foundation. 3-D visualization of the seismic velocity demarcates the extent of weak or untreated zones. This methodology facilitates to update the design parameters according to Q-values during the construction stage and estimate the required level of reinforcement and support system. Similar methodology can be applicable in other areas under same site conditions.

  9. Joint Program on Rapid Prototyping. RaPIER (Rapid Prototyping to Investigate End-User Requirements).

    Science.gov (United States)

    1985-03-28

    Prototype System Description Language," ISSI Technical Report, unnumbered, January 30,198 6 ., . [JONES84] T. Capers Jones. "Reusability in Programming: A...Systems, Inc.. "PSDL: Prototype System * Description Language," ISSI Technical Report, unnumbered, January 30, 1986. T. Capers Jones. "Reusability in...Game Design," IEEE Software, Vol. 1, No. 4, October 1984, pp. 28-38. -[LISKOV5] -5. Barbara H. Liskov, Stephen N. Zilles. "Specification Techniques for j

  10. A critical analysis of Pier Paolo Pasolini’s African Oresteia

    Directory of Open Access Journals (Sweden)

    K. Michaelis

    1996-05-01

    Full Text Available Pasolini's Appunti per un’Orestiade africana (1970 is a metaphorical film, inspired by the Greek legend of Orestes, in which Pasolini views postcolonial African history through the lens of mythology. His portrait of the birth of “modern” Africa is an attempt to narrate the passage from past to present and to salvage "prehistory" through his dream of the unification of the rational, democratic state and the irrational, primal slate of being. It is, however, a dream punctuated by contradictions and paradoxes, a dream which Pasolini will later abandon. Yet it is significant in the overall development of Pasolini's genre.

  11. 78 FR 42865 - Safety Zone; Chicago Harbor; Navy Pier Southeast; Chicago, IL

    Science.gov (United States)

    2013-07-18

    ..., Regulatory Planning and Review, and does not require an assessment of potential costs and benefits under... substantial number of small entities. The term ``small entities'' comprises small businesses, not-for-profit... jurisdictions with populations of less than 50,000. The Coast Guard certifies under 5 U.S.C. 605(b) that...

  12. 77 FR 50919 - Safety Zone: Wedding Reception Fireworks at Pier 24, San Francisco, CA

    Science.gov (United States)

    2012-08-23

    .... SUPPLEMENTARY INFORMATION: Table of Acronyms DHS Department of Homeland Security FR Federal Register NPRM Notice... have taking implications under Executive Order 12630, Governmental Actions and Interference with... Oceanic and Atmospheric Administration (NOAA) Chart 18650. The temporary safety zone applies to...

  13. Computational Modelling Strategies for Nonlinear Response Prediction of Corroded Circular RC Bridge Piers

    Directory of Open Access Journals (Sweden)

    Mohammad M. Kashani

    2016-01-01

    Full Text Available A numerical model is presented that enables simulation of the nonlinear flexural response of corroded reinforced concrete (RC components. The model employs a force-based nonlinear fibre beam-column element. A new phenomenological uniaxial material model for corroded reinforcing steel is used. This model accounts for the impact of corrosion on buckling strength, postbuckling behaviour, and low-cycle fatigue degradation of vertical reinforcement under cyclic loading. The basic material model is validated through comparison of simulated and observed responses for uncorroded RC columns. The model is used to explore the impact of corrosion on the inelastic response of corroded RC columns.

  14. 76 FR 30014 - Safety Zone; Fleet Week Maritime Festival, Pier 66, Elliott Bay, Seattle, WA

    Science.gov (United States)

    2011-05-24

    ... of the notice-and-comment rulemaking process established by the Administrative Procedures Act (APA... comments stated that the www.regulations.gov Web site would not accept the video file format desired for... support the file format for the video comment, other means remained available to submit the video to the...

  15. Lowering of pipeline in the Peloneas's Beach and mechanical protection of pipeline in main and secondary piers; Rebaixamento de dutos na Praia das Peloneas e protecao mecanica de dutos nos piers principal e secundario

    Energy Technology Data Exchange (ETDEWEB)

    Teixeira, Ana Paula da Silva M.; Basilio, Kenia Afonso [PLANAVE, Rio de Janeiro, RJ (Brazil)

    2003-07-01

    The growing concern of PETROBRAS with the environmental protection aspects is intimately related with the need of developing preventive works of protection to the pipelines of the company. A study was accomplished in the pipelines inside the Guanabara Bay, whose goals was divided in three parts: identification of the risk areas for the pipelines; determination of the minimum depth of burying of the pipelines so that the risk in appreciation is minimized; identification of the areas in that the burying or a complemental burying make herself necessary. The study went based on to theory of conservation of energy, being admitted the non preservative embarkation system, and in the theory of the elasticity. For such a commercial program of finite elements was used. With base in the limits foreseen in the study, two critical areas of the Guanabara Bay were considered, which already suffered intervention with lowering. (author)

  16. 76 FR 47441 - Safety Zone; Apache Pier Labor Day Weekend Fireworks Display, Atlantic Ocean, Myrtle Beach, SC

    Science.gov (United States)

    2011-08-05

    ..., call or e-mail Chief Warrant Officer Robert B. Wilson, Coast Guard Sector Charleston Waterways Management Division at telephone: 843-740-3188, e-mail Robert.B.Wilson@uscg.mil . If you have questions on... notice of the safety zone by Marine Safety Information Bulletin, Broadcast Notice to Mariners, and...

  17. Bridge pier failure probabilities under combined hazard effects of scour, truck and earthquake. Part II: failure probabilities

    Science.gov (United States)

    Liang, Zach; Lee, George C.

    2013-06-01

    In many regions of the world, a bridge will experience multiple extreme hazards during its expected service life. The current American Association of State Highway and Transportation Officials (AASHTO) load and resistance factor design (LRFD) specifications are formulated based on failure probabilities, which are fully calibrated for dead load and non-extreme live loads. Design against earthquake load effect is established separately. Design against scour effect is also formulated separately by using the concept of capacity reduction (or increased scour depth). Furthermore, scour effect cannot be linked directly to an LRFD limit state equation because the latter is formulated using force-based analysis. This paper (in two parts) presents a probability-based procedure to estimate the combined hazard effects on bridges due to truck, earthquake and scour, by treating the effect of scour as an equivalent load effect so that it can be included in reliability-based failure calculations. In Part I of this series, the general principle for treating the scour depth as an equivalent load effect is presented. In Part II, the corresponding bridge failure probability, the occurrence of scour as well as simultaneously having both truck load and equivalent scour load effect are quantitatively discussed. The key formulae of the conditional partial failure probabilities and the necessary conditions are established. In order to illustrate the methodology, an example of dead, truck, earthquake and scour effects on a simple bridge pile foundation is represented.

  18. Predicting complications in pre-eclampsia : external validation of the fullPIERS model using the PETRA trial dataset

    NARCIS (Netherlands)

    Akkermans, Joost; Payne, Beth; von Dadelszen, Peter; Groen, Henk; de Vries, Johanna; Magee, Laura A.; Mol, Ben Willem; Ganzevoort, Wessel

    2014-01-01

    Objective: The internally validated fulIPIERS model predicts adverse maternal outcomes in women with pre-eclampsia within 48 h after eligibility. Our objective was to assess generalizability of this prediction model. Study design: External validation study using prospectively collected data from two

  19. 33 CFR 165.1324 - Safety and Security Zone; Cruise Ship Protection, Elliott Bay and Pier-91, Seattle, Washington.

    Science.gov (United States)

    2010-07-01

    ... designated as responsible for the development, implementation, revision and maintenance of the facility... such as excursion vessels, sight seeing vessels, dinner cruise vessels, and whale watching...

  20. 77 FR 20361 - Takes of Marine Mammals Incidental to Specified Activities; Pier 36/Brannan Street Wharf Project...

    Science.gov (United States)

    2012-04-04

    ... business hours, at the aforementioned address. FOR FURTHER INFORMATION CONTACT: Michelle Magliocca, Office... variables. Frequency describes the sound's pitch and is measured in hertz (Hz) or kilohertz (kHz),...

  1. 桥梁双柱式桥墩的Pushover分析%The Pushover Analysis of Double-Column Piers

    Institute of Scientific and Technical Information of China (English)

    高依强; 陈永锋; 李青宁

    2014-01-01

    结构基于性能的抗震设计已成为结构抗震研究的主要方向,而作为该理论核心部分的Pushover分析方法有更进一步的发展空间.以实际桥梁结构为背景,对双柱式桥墩进行Pushover分析,其结果与反应谱分析法比较,结果表明该方法对双柱式桥墩有很好的适用性.

  2. 75 FR 34927 - Safety Zone; Parade of Ships, Seattle SeaFair Fleet Week, Pier 66, Elliott Bay, WA

    Science.gov (United States)

    2010-06-21

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Parade of Ships, Seattle SeaFair Fleet Week... with the Parade of Ships for the annual Seattle SeaFair Fleet Week. This action is intended to restrict... action is necessary to ensure the safety of spectators and participants attending Fleet Week...

  3. Bridge pier failure probabilities under combined hazard effects of scour, truck and earthquake. Part I: occurrence probabilities

    Science.gov (United States)

    Liang, Zach; Lee, George C.

    2013-06-01

    In many regions of the world, a bridge will experience multiple extreme hazards during its expected service life. The current American Association of State Highway and Transportation Officials (AASHTO) load and resistance factor design (LRFD) specifications are formulated based on failure probabilities, which are fully calibrated for dead load and nonextreme live loads. Design against earthquake loads is established separately. Design against scour effect is also formulated separately by using the concept of capacity reduction (or increased scour depth). Furthermore, scour effect cannot be linked directly to an LRFD limit state equation, because the latter is formulated using force-based analysis. This paper (in two parts) presents a probability-based procedure to estimate the combined hazard effects on bridges due to truck, earthquake and scour, by treating the effect of scour as an equivalent load effect so that it can be included in reliability-based bridge failure calculations. In Part I of this series, the general principle of treating the scour depth as an equivalent load effect is presented. The individual and combined partial failure probabilities due to truck, earthquake and scour effects are described. To explain the method of including non-force-based natural hazards effects, two types of common scour failures are considered. In Part II, the corresponding bridge failure probability, the occurrence of scour as well as simultaneously having both truck load and equivalent scour load are quantitatively discussed.

  4. 78 FR 70024 - Draft Environmental Impact Statement for the Modernization and Repair of Piers 2 and 3, Military...

    Science.gov (United States)

    2013-11-22

    ... decision maker; federally recognized Native American tribes, federal, state, and local agencies and... federally recognized Native American tribes; federal, state, and local agencies and officials; and... hazardous materials, hazardous waste, toxic substances, and contaminated sites. Based on the analysis...

  5. 76 FR 66274 - Small Takes of Marine Mammals Incidental to Specified Activities; Pier 36/Brannan Street Wharf...

    Science.gov (United States)

    2011-10-26

    ... Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), Commerce. ACTION... of Protected Resources, National Marine Fisheries Service, 1315 East-West Highway, Silver Spring, MD... the continent. The Bay has undergone extensive industrialization, but remains an important...

  6. 29 CFR 1926.752 - Site layout, site-specific erection plan and construction sequence.

    Science.gov (United States)

    2010-07-01

    ... concrete in the footings, piers and walls and the mortar in the masonry piers and walls has attained, on... walls or the mortar in the masonry piers and walls has attained, on the basis of an appropriate...

  7. Pushover法的独柱墩桥梁抗震性能研究%Research on Earthquake-resistant of Single Column Pier Based on Pushover

    Institute of Scientific and Technical Information of China (English)

    赵静; 李睿

    2011-01-01

    Pushover方法作为一种非线性静力分析方法,以其简单、方便的特点得到广泛的应用.简要介绍Pushover方法的基本原理和实施步骤,结合工程实例对非线性时程分析的结果进行比较,指明Pushover分析方法对于评价结构的抗震性能具有一定的准确性.%Pushover analysis as a nonlinear static analysis obtains the widespread application by its simple and convenient characteristic. Concise introduces basic principle and operation steps of Pushover analysis, compared result with nonlinear time history through example of project, finally indicated the Pushover analysis have certain accuracy to evaluate the seismic performance of Structure.

  8. 高墩大跨连续刚构桥的Pushover分析%Pushover analysis of high pier and long span continuous steel bridge

    Institute of Scientific and Technical Information of China (English)

    李青宁; 高依强; 朱坤

    2013-01-01

    Pushover法作为一种非线性静立分析方法,在基于结构位移/性能的抗震思想下有更为广泛的应用前景.结合工程实例,对高墩大跨连续刚构桥进行Pushover分析,其结果与非线性时程分析法比较,结果表明该方法对桥梁结构有较好的适用性和发展潜力.

  9. The use of multi-band transmission data collected at Scripps pier in November 2006 for the investigation of aerosol characteristics

    NARCIS (Netherlands)

    Jong, A.N. de; Eijk, A.M.J. van; Fritz, P.J.; Cohen, L.H.; Moerman, M.M.

    2007-01-01

    The knowledge of the atmospheric aerosol characteristics is of great importance for the range performance of Infrared and Electro-Optical sensor systems. The composition, the concentration and the size distribution of aerosols determine their scattering behavior as function of wavelength and thus th

  10. Public Interest Energy Research (PIER) Program. Final Project Report. California Energy Balance Update and Decomposition Analysis for the Industry and Building Sectors

    Energy Technology Data Exchange (ETDEWEB)

    de la Rue du Can, Stephane [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Hasanbeigi, Ali [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Sathaye, Jayant [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2010-12-01

    This report on the California Energy Balance version 2 (CALEB v2) database documents the latest update and improvements to CALEB version 1 (CALEB v1) and provides a complete picture of how energy is supplied and consumed in the State of California. The CALEB research team at Lawrence Berkeley National Laboratory (LBNL) performed the research and analysis described in this report. CALEB manages highly disaggregated data on energy supply, transformation, and end-use consumption for about 40 different energy commodities, from 1990 to 2008. This report describes in detail California's energy use from supply through end-use consumption as well as the data sources used. The report also analyzes trends in energy demand for the "Manufacturing" and "Building" sectors. Decomposition analysis of energy consumption combined with measures of the activity driving that consumption quantifies the effects of factors that shape energy consumption trends. The study finds that a decrease in energy intensity has had a very significant impact on reducing energy demand over the past 20 years. The largest impact can be observed in the industry sector where energy demand would have had increased by 358 trillion British thermal units (TBtu) if subsectoral energy intensities had remained at 1997 levels. Instead, energy demand actually decreased by 70 TBtu. In the "Building" sector, combined results from the "Service" and "Residential" subsectors suggest that energy demand would have increased by 264 TBtu (121 TBtu in the "Services" sector and 143 TBtu in the "Residential" sector) during the same period, 1997 to 2008. However, energy demand increased at a lesser rate, by only 162 TBtu (92 TBtu in the "Services" sector and 70 TBtu in the "Residential" sector). These energy intensity reductions can be indicative of energyefficiency improvements during the past 10 years. The research presented in this report provides a basis for developing an energy-efficiency performance index to measure progress over time in the State of California.

  11. Repair, Evaluation, Maintenance, and Rehabilitation Research Program. In Situ Repair of Deteriorated Concrete in Hydraulic Structures: Epoxy Injection Repair of a Bridge Pier

    Science.gov (United States)

    1990-09-01

    bearing seat. In addition, the top of the con- crete seat was sealed with fiber -reinforced "Black Jack" roof cement that was sloped toward the... fiber reinforced roof cement applied so that the surface slopes to the openings made in the curtain walls. 3. This work should be accomplished before...sox ORt REMARKS ELEATONDEPH EG RaCOV. SAMPLE (DUUWlbj *Am*. moto Jose. dilAh of ENT_ No IM66ifid dt- It60W* glp1 ,r-7vsPe -R TORO, Cra~eA. - CA/c r

  12. Tiesu psiholoģiskās ekspertīzes atzinums kā pierādījumu veids kriminālprocesā

    OpenAIRE

    Purēna, Elīna

    2013-01-01

    Maģistra darba temats ir uzskatāms par aktuālu, jo tiesu psiholoģiskā ekspertīze ar katru gadu tiek noteikta aizvien biežāk gan kompleksās tiesu psiholoģiskās un psihiatriskās ekspertīzes ietvaros, gan arī atsevišķi. Galvenie aplūkotie jautājumi ir tiesu psiholoģiskās ekspertīzes jēdziens, tiesu psiholoģiskās ekspertīzes atzinuma jēdziens, tiesu psiholoģiskās ekspertīzes atzinuma pieļaujamība, ja ekspertīzi veicis eksperts, kas nav reģistrēts Tiesu ekspertu reģistrā, faktiskie apstākļi, ...

  13. The use of multi-band transmission data collected at Scripps pier in November 2006 for the investigation of aerosol characteristics

    NARCIS (Netherlands)

    Jong, A.N. de; Eijk, A.M.J. van; Fritz, P.J.; Cohen, L.H.; Moerman, M.M.

    2007-01-01

    The knowledge of the atmospheric aerosol characteristics is of great importance for the range performance of Infrared and Electro-Optical sensor systems. The composition, the concentration and the size distribution of aerosols determine their scattering behavior as function of wavelength and thus

  14. Component Testing for Modular Pier Replacement at McMurdo Station, Antarctica: Inflatable Pontoons, Gelbo Flex and Full-Scale Cold Storage/Fold Tests

    Science.gov (United States)

    2014-08-01

    40 4 0 10,000 No leaks Welded -4 Vulcanized −40 4 0 10,000 No leaks ERDC/CRREL TR-14-14 8 The LMCS pontoon fabric (samples Pontoon-1 to 3...cracking or leaks in the fabric or fabric joint welds . Upon receiving the pontoon, we inflated it and determined that there were 5 leaks caused from prior...durability and strength of the pontoon fabric when tested at Antarctic temperatures by using a cold-modified Gelbo flex (ASTM F392) test. The

  15. Il “modello emiliano” da Giuseppe Dozza a Pier Luigi Bersani. Video-saggio tra comunicazione e propaganda politica (1946–2013

    Directory of Open Access Journals (Sweden)

    Sante Cruciani

    2014-01-01

    Full Text Available Nella storia dell’Italia repubblicana, il “modello emiliano” ha costituito la carta d’identità dell’azione riformatrice dei comunisti nel governo locale e regionale. La fortuna internazionale di questa esperienza ha accompagnato le strategie del “compromesso storico” e dell’“eurocomunismo” e il dialogo tra il Pci e la sinistra europea. Questo video si sofferma sulla costruzione mediatica del “modello emiliano”.

  16. Meteorological, biological, and hydrographic data collected from Cedar Point Fishing Pier, Cedar Point, Alabama from 04/04/2008 - 12/31/2013 (NODC Accession 0117373)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Abstract: Dauphin Island Sea Lab and the Mobile Bay National Estuary Program have partnered with the Alabama Department of Conservation and Mobile County to provide...

  17. Commencement Bay Studies Phase II, Environmental Impacts Assessment.

    Science.gov (United States)

    1983-10-01

    oriented uses (marinas, parks, wharves, public facilities and open space restaurants, specialty food markets , etc.) and on-land residential uses on the...alteration of natural habitat and water courses used by sportsfishermen, boaters, beachcombers, birdwatchers , and others engaged in recreational pursuits...development of marinas in areas with natural amenities may degrade the use of the site and adjacent areas for other recreational pursuits such as birdwatching

  18. 78 FR 13811 - Safety Zone; Underwater Escape Event, Seaport, East River, NY

    Science.gov (United States)

    2013-03-01

    ...: All waters of the East River south of the Brooklyn Bridge and north of a line drawn from the southwest corner of Pier 3, Brooklyn, to the southeast corner of Pier 6 Manhattan. Seaport, East River Safety Zone...

  19. Severe Weather Guide, Mediterranean Ports. 18. Ibiza

    Science.gov (United States)

    1988-05-01

    two piers (Figure 2-3). A fuel pier extends southwest from the northern side of the port, while Estacion Maritima pier extends northeastward from the...side of the port, while Estacion Maritima (Maritime Station) pier extends northeastward from the southern side. The westernmost basin is used...wind velocity. At a given wind speed and a given state of wave development, each spectrum has a band of frequencies where most of the total energy is

  20. United Airlines Makes Gonnections Easier for Passengers

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ United is the only U.S. Carrier connecting Pearl River Delta Region to offer customers SkyPier ferry service and pier-side check-in. United Airlines is the first U.S. Airline to offer customers convenient travel between the Pearl River Delta cities and Hong Kong International Airport using the SkyPier ferry service and pier-side check-in, beginning today.

  1. Pierce Groups of Exchange Rings%置换环的Pierce群

    Institute of Scientific and Technical Information of China (English)

    陈焕艮

    2009-01-01

    环R的理想P称为Pierce理想,如果R/p是R的Pierce茎.令Pier(R):{P | P是R的Pierce理想}.可证Pier(R)是拓扑空间.若R是幂等元中心的置换环,则Ko(R)≌{f:Pier(R)→Z|f,是连续的).

  2. Improvement jetties near petroEcuador in La Liberdad, Ecuador

    NARCIS (Netherlands)

    Beekx, R.; Jensen, I.; Mikkers, Y.; Dirksen, J.

    2005-01-01

    The first issue involves the accessibility of the pier of the refinery where coastal tankers moor to load or unload their cargo. The current depth at the pier is too small for large coastal tankers to fully load when mooring at the pier. In order to increase their cargo capacity, the depth in the mo

  3. Improvement jetties near petroEcuador in La Liberdad, Ecuador

    NARCIS (Netherlands)

    Beekx, R.; Jensen, I.; Mikkers, Y.; Dirksen, J.

    2005-01-01

    The first issue involves the accessibility of the pier of the refinery where coastal tankers moor to load or unload their cargo. The current depth at the pier is too small for large coastal tankers to fully load when mooring at the pier. In order to increase their cargo capacity, the depth in the

  4. 33 CFR 165.164 - Security Zones: Dignitary Arrival/Departure and United Nations Meetings, New York, NY.

    Science.gov (United States)

    2010-07-01

    ... southwest corner of Pier 7 North, Brooklyn; and south of a line drawn between the northeast corner of Pier 13, Manhattan, and the northwest corner of Pier 2 North, Brooklyn. (2) (3) Location. Marine Air... Rikers Island Bridge at approximate position 40°46′51″ N 073°53′21″ W (NAD 1983) and east of a line drawn...

  5. George Orwell's Political Point of View Reflected in The Road to Wigan Pier%从《通往维根码头之路》看奥威尔的政治观

    Institute of Scientific and Technical Information of China (English)

    王小梅

    2004-01-01

    本文以《通往维根码头之路》为起点,解读著名政治作家奥威尔有关社会主义、知识分子和工人阶级的社会角色等基本的政治观点,结合奥威尔的出身和教育背景,分析他政治观点的形成以及这些观点对他的其他作品的影响.

  6. „This is just a fucking movie. Also fahrt ab damit!“ Eine Rezensionsreise durch Abel Ferraras Film ‚Pasolini‘, anlässlich des 40. Todestages von Pier Paolo Pasolini

    Directory of Open Access Journals (Sweden)

    Angela Oster

    2015-06-01

    Full Text Available Das Leben Pasolinis ist bereits zu wiederholten Malen der Gegenstand von Texten und Filmen gewesen. Aufgrund des skandalträchtigen Todes des Linksintellektuellen – er wurde unter nie genau geklärten Umständen 1975 ermordet – ranken sich viele Mythen um den letzten Tag Pasolinis. Genau diesen 'ultimo giorno' verfilmt Abel Ferrara (1914 und setzt dabei eigene Akzente. Mit literar- und dokumentargenauer Perspektive bietet Ferrara gleichwohl innovative Interpretationen in Hinblick auf einen der wichtigsten Künstler Italiens.

  7. 基于Abaqus的浮码头系缆墩桩基修复分析%Repair analysis on pile foundation of mooring pier in floating wharf based on Abaqus

    Institute of Scientific and Technical Information of China (English)

    李瑜; 翟秋; 项雯; 童斯超

    2015-01-01

    通过对南京某码头的受撞系缆墩的现场检测,确定了系缆墩的损伤情况,并对系缆墩桩基采用钢护筒修复,通过Abaqus有限元软件分析了修复的可行性及修复后系缆墩的动力特性,提出相关建议.结果表明,采用钢护筒对局部受损严重的系缆墩桩基进行修复是可行的,修复后桩基最大拉应力有明显减小;桩基是系缆墩中较为危险的结构,在使用中,要尽量避免出现与前3阶频率相近的振源,并避免系缆墩桩基倾斜方向上的船舶撞击力.

  8. 雷公藤非生物碱成分对菜青虫杀虫活性研究%Insecticidal Activities of the Non-alkaloid Extracts from Tripterygium wilfordii against Piers rapae L.

    Institute of Scientific and Technical Information of China (English)

    罗都强; 张兴

    2000-01-01

    The non-alkaloid contents were extracted from the root bark o f Tripterygium wilfordii Hook. The results of bioassy showed that the non- alkaloid extracts has abviously insectidal activities to imported cabbage worm ( Pieris rapae L.).LC50 values of poisoning to the 5th instarts of Pie ris rapae is 7.23 mg.L-1. The values of medium antifeeding concentratio n (AFC50) of the non-alkaloid extracted against the 5th larval of Pieris rape is 11.34 mg.L-1. Median narcosis dose (ND50) is 15.54 μg/g.Me dian contact dose (LD50) is 3.1079 μg/head. The non-alkaloid extract s have no fumigant to insect. The main poisoning symptoms are that the tested in sect showed paralysis and the epiderm of the larval turns black, the larval are dead at last.

  9. Nonlinear finite element analysis of prestressed pier based on elastoplastic damage model%基于弹塑性损伤模型的预应力闸墩非线性有限元分析

    Institute of Scientific and Technical Information of China (English)

    陈震; 徐远杰

    2010-01-01

    常规的弹塑性模型由于没有考虑到损伤对结构强度的影响,常常得到高于结构实际承载力的应力分布,难以模拟破坏时由于内部损伤的累积导致的变形增加和承载力降低.将规范应力应变曲线进行简化,推导出弹翅性损伤模型曲线,采用简支纯弯梁验证了该简化模型的正确性,然后将该模型应用于深溪沟水电站预应力闸墩非线性有限元分析.计算结果表明考虑结构弹翅性损伤较线弹性分析能更好反应结构真实受力特性,计算结果对预应力钢筋的布置和闸墩的设计具有指导意义.

  10. 钢筋混凝土柱式桥墩的弹塑性抗震分析%Elastic and Plastic Anti-Seismic Analysis of Reinforced Concrete Column Type Piers

    Institute of Scientific and Technical Information of China (English)

    汪罗英; 郑越

    2005-01-01

    针对在强震作用下钢筋混凝土柱式桥墩会进入塑性状态的特性,采用有刚度退化的武田三线型滞回模型(弯矩-曲率关系),编制了非线性时程有限元程序,对一典型的双柱式桥墩进行了弹塑性抗震分析,得出了一些有益的结论.

  11. 桥梁单墩不同侧向力分布模式Pushover分析方法%Pushover analysis of different distribute lateral load patterns for seismic assessment of bridge piers

    Institute of Scientific and Technical Information of China (English)

    盛光祖; 李建中; 陈亮

    2010-01-01

    Pushover分析使用一定分布模式的递增水平侧向力代表地震作用下结构惯性力的分布,分布模式的不同会直接影响Pushover分析的结果,尤其是结构高阶振型影响显著时,因此侧向力分布的选取是Pushover分析中的一个关键问题.通过选取7条强震地震波,对比了典型地震波下非线性时程分析(IDA)和采用4种不同侧向力分布模式的Pushover分析的15m、30m和60m墩的地震反应.并从总体、构件和截面三个层面对各种模式Pushover分析进行评价,分析其适用性.研究表明结构进入非线性和高阶振型影响显著时,自适应侧向力模式较其他模式Pushover分析结果更接近IDA分析结果.

  12. Modified Modal Pushover Method Applied to Seismic Analysis of High-Pier Bridge%改进模态pushover法应用于高墩桥梁抗震分析

    Institute of Scientific and Technical Information of China (English)

    龙晓鸿; 潘玲; 陈恩友; 陈宏伟

    2008-01-01

    国内外尚缺乏针对高墩桥梁抗震的设计方法.介绍了模态pushover分析方法与能力谱法相结合后的改进模态pushover分析方法,并以实例进行高阶振型对高墩桥梁抗震能力的影响分析.将其计算结果与常规加载的pushover分析方法的计算结果进行比较,分析表明在高墩桥梁中不能忽略高阶振型的影响.

  13. Suitability Analysis of Pile-column Pier Foundation Using Low Strain Method and In Situ Experiments%桥梁桩柱式基础低应变法检测适宜性分析及现场试验

    Institute of Scientific and Technical Information of China (English)

    杨宇; 马晔

    2014-01-01

    The propagation of stress waves in a pile-column system was analyzed using the elastic-ity theory and was verified by in situ experimentation.This study first analyses the propagation of a semi-spherical stress wave after transient shock in a column-pile system according to the Saint-Venant principle.The results indicate that the stress wave caused by shock on top of the bent cap or on a combined section of pile and column can still satisfy the plane section.A method is intro-duced to verify this assumption in which shock is applied to a certain point in a pile-column sys-tem,and the peak time of the stress wave is collected in the same section by conducting a multi-channel equipment.If the difference of each peak time is less than a certain value,it can be conclu-ded that the wave propagation is unanimous and satisfies the plane section.Two groups of in situ tests were performed on a pile-column system in which shock was applied to the top of the bent cap and to a combined section of pile and column.Stress waves were collected on the section at the top of the column,the combined section of pile and column,and the pile section under the tie beam.When shock was applied to the top of the bent cap,the wave velocity value was in a com-mon range,and the stress waves reached the outer edge of the pile section synchronously.It was considered that the stress wave reached the center of the same section at the same time by calcu-lating the difference in peak time of the stress wave at the outer edge and at center of the section. Thus,it was concluded that the plane section can be applied in such a mode.However,this conclu-sion is not completely valid when the stress wave in the pile is caused by shock on the combined section of the pile.In the pile section near the tie beam,the value of the peak time of the stress wave in each channel varied;therefore,the stress wave did not reach the center of the section at the same time.However,in the pile section slightly far from the shock point,the value of the peak time of the stress wave in each channel was reached at nearly the same time.The propagation of stress waves were transform to uniformity,thus for the mode of shock on the combined section, the plane section can be applied to the surface at a distance from the shock point.%根据圣维南原理分析瞬态激振后,桩柱式基础桩身内应力波特征。认为盖梁顶部激振、基桩顶面和墩柱结合部激振时,应力波在桩身内仍可满足平截面假定。提出桩身内应力波是否为平面波的判别方法,设计并完成2组现场试验。盖梁顶部激振时,应力波同步到达同一桩身横截面侧壁各拾振区,且计算得到的横截面中心处首波波峰与侧壁处首波波峰到达时刻基本一致,满足低应变法中平截面成立的条件。而基桩和墩柱结合部激振试验则表明,在远离系梁的拾振横截面内,应力波才可认为同步到达各拾振区,且计算得到的拾振横截面中心处首波波峰与侧壁处首波波峰到达时刻基本一致。故对于基桩和墩柱结合部激振激振的情形,远离系梁的桩身内平截面假定才可成立。

  14. 横风对货车通过高墩桥梁行车安全性的影响分析%The Running Safety Analysis of Freight Trains Passing on the High Pier Bridge to Cross Wind Loads

    Institute of Scientific and Technical Information of China (English)

    凌知民; 高碧波; 项海帆

    2007-01-01

    在对国内外研究成果进行简要介绍和分析的基础上,本文按一系悬挂和变摩擦阻尼建立货车的动力计算模型;轮轨作用力采用Kalker的线性接触理论并按Vermeulen-Jnhnson的非线性理论对其进行修正的方法;作为车桥系统外部激励的抖振力的时域随机风荷载按Shinozuka理论进行模拟.以某高墩连续梁刚构桥为对象,对考虑横风作用时货车的行车安全性进行了对比分析.计算结果表明:在横风作用时,背风侧的脱轨系数和轮轨作用力增加,轮重减载率减小,迎风侧的脱轨系数和轮轨作用力有所减小,轮重减载率增加;与无风时相比,横风的作用将导致车辆的行车安全性较为不利,这一结论与文献[2]的试验结果基本一致.

  15. 谷拉河大桥墩液压自爬模施工受力分析%The Construction Stress Analysis of Hydraulic Creep Form in the Bridge Pier of River Gula

    Institute of Scientific and Technical Information of China (English)

    崔凌岳

    2007-01-01

    桥梁的高桥墩施工属于特种结构施工范畴,现场施工方案的选择一直以来偏重于经验而忽视施工受力分析.本文基于工程实例,给出了桥梁高墩身施工选用液压自爬模完整的施工受力计算过程,且已成功地应用于工程实践,可供类似特种结构施工参考.

  16. 谷拉河大桥混凝土薄壁空心墩爬模施工技术%Construction Technique of Climbing Forms for the Thin-Walled, Hollow Piers of the Gula River Bridge

    Institute of Scientific and Technical Information of China (English)

    彭彦彬; 张彦光

    2005-01-01

    高桥墩施工是大桥施工的重点和难点,合理选择施工方法是成功的关键.介绍桥墩施工的基本方法及各自的特点,并着重介绍液压自动爬升模板的构造、施工工艺、关键技术及该施工方法的特点.实践表明,液压自动爬升模板系统施工速度快,施工质量好,作业安全,能节省大量的模板拆、装工作,经济效益高,是一种很有发展前途的高桥墩及其他高大建筑施工的新型模板系统,具有较高的推广价值.

  17. 某码头软黏土岸坡破坏机制分析及重建%Study of failure mechanism of a soft clay slope and pier reconstruction

    Institute of Scientific and Technical Information of China (English)

    刘润; 闫玥; 闫澍旺; 乔春生

    2009-01-01

    在某吹填软黏土岸坡上修建码头时发生了较大规模的滑坡,待滑体稳定后采取了一系列的工程措施,实现了码头的重建.详细阐述了岸坡发生滑动的全过程,通过现场勘察和有限元模拟分析了岸坡发生滑动破坏的原因.分别考虑了打桩与交通荷载作用,导致地基土中产生超静孔压,从而对岸坡的稳定性造成影响.分析结果表明,岸坡发生失稳破坏是多种不利工况叠加的结果,其主要原因是在低潮位时的超挖引起的,打桩及交通荷载作用也是造成滑坡的不利因素.在破坏的岸坡上重建码头,采用了振动砂桩加固地基,同时在地表铺碎石垫层作为预压荷载,加速地基土的固结.有限元分析和码头的成功重建表明,使用砂桩加固地基可以同时达到提高地基承载力和加速土体排水固结的目的,对于码头的重建是有效的技术措施.%A large scale landslide took place when constructing a port on soft clay foundation. A series of engineering measures were taken for reconstructing the port. Detailed investigation and finite element analysis of slope stability were performed to determine the possible causes of slope failure. In the analysis, the excess pore water pressure in the subsoil caused by piling and the traffic load has been considered especially. The analyzing results show that the failure of the slope was caused by the superposition of several unfavorable operation conditions. It is concluded that the primary cause for the slope failure is under-cutting combined with the low tide level. Furthermore, the pile driving and the traffic load on the slope topside also play a negative role in slope failure. The pile driving construction has a notable impact on slope stability and the safety factor considering the piling effect is much less than that without considering it. However, the influence of the traffic load is not so large relatively. The ground at failed slope was rehabilitated using vibro-sand-piles together with a crushed stone layer on the ground surface for consolidation. Finite element method is applied to simulate the ground improvement effect. The analysis results and successful practice show that the use of sand piles for reinforcement and consolidation is an effective technique for rehabilitating the failed slope.

  18. Annual Adaptive Management Report for Compensatory Mitigation at Keyport Lagoon: Mitigation of Pier B Development at the Bremerton Naval Facilities - Compensatory Mitigation at Keyport Lagoon - Naval Underwater Warfare Center Division - Keyport, Washington

    Energy Technology Data Exchange (ETDEWEB)

    Vavrinec, John; Borde, Amy B.; Woodruff, Dana L.; Brandenberger, Jill M.; Thom, Ronald M.; Wright, Cynthia L.; Cullinan, Valerie I.

    2012-06-01

    Unites States Navy capital improvement projects are designed to modernize and improve mission capacity. Such capital improvement projects often result in unavoidable environmental impacts by increasing over-water structures, which results in a loss of subtidal habitat within industrial areas of Navy bases. In the Pacific Northwest, compensatory mitigation often targets alleviating impacts to Endangered Species Act-listed salmon species. The complexity of restoring large systems requires limited resources to target successful and more coordinated mitigation efforts to address habitat loss and improvements in water quality that will clearly contribute to an improvement at the site scale and can then be linked to a cumulative net ecosystem improvement.

  19. Daily surface water temperature data collected from bucket casts from pier at Leigh Marine Laboratory, Auckland, New Zealand from 1967-01-01 to 2011-04-30 (NCEI Accession 0127323)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Collected seawater temperatures at the Leigh Marine Laboratory. Dataset contains an archive of material to 2011. The location of the laboratory is lat: -36.26929,...

  20. 锚杆框格梁在高压送电线路边坡支护中的应用%The application of the bolt frame pier on the slope support of high-tension-overhead line

    Institute of Scientific and Technical Information of China (English)

    张亮亮

    2010-01-01

    针对广东省某220 kV送电线路塔位出现的浅层滑坡,采用Geostudio软件进行了边坡稳定性分析,根据分析计算结果确定采用锚杆框格梁支护的加固方案,以确保送电线路的安全稳定,对同类工程具有一定指导意义.

  1. 滑坡涌浪对高桩码头船舶撞击力的影响%Effects of landslide generated impulse waves on ship impact force for pile wharf

    Institute of Scientific and Technical Information of China (English)

    王平义; 韩林峰; 喻涛; 孟彩霞

    2016-01-01

    涌浪作为库岸滑坡的主要次生灾害,给库区码头、船舶以及水工建筑物带来巨大的安全隐患。高桩码头是目前三峡库区最为常见的码头结构形式之一,船舶撞击力对其在使用阶段的稳定性、安全性具有至关重要的影响。通过水槽模型试验,对滑坡涌浪作用下三峡库区系泊船舶与高桩码头间的撞击力进行研究。试验结果表明:系泊船舶对高桩码头的最大撞击力与涌浪初始波高、水体附加质量等参数有关,与水深无关;而用《港口工程荷载规范》计算得到的船舶撞击力与试验值相比偏小,不利于库区码头的设计安全。结合相关试验数据,提出滑坡涌浪影响下高桩码头船舶撞击力计算公式。%As the main secondary result of reservoir bank landslides, surges pose enormous potential risk to wharves, ships, and hydraulic structures in the Three Gorges Reservoir ( TGR) area. The high⁃pile wharf is cur⁃rently one of the most common wharf structures in TGR. Ship impact has a significant effect on the stability and safety of working wharves. Using flume model experiments, the landslide surge impact force between ships and wharves in the TGR was studied. The results show that the maximum impact force correlates to the height of the leading wave and the added water mass coefficient, but is not correlated to the water depth. The ship impact forces computed by the "Lode Code for Harbor Engineering" are smaller than the experimental values and therefore are unsuitable for safe wharf design. Combined with relevant experimental data, this paper proposes an equation for landslide surge impact force between ships and high⁃pile wharves.

  2. RISK LEVEL ANALYSIS ON THE PREVENTIVE EROSION CAPACITY OF BRIDGES

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Deficiency of the Preventive Erosion Capacity (PEC) of a bridge pier is the main factor leading to bridge failures. In this paper, the PEC of bridge piers was analyzed using the stochastic analysis method. The definitions of the reliability and risk level of a bridge pier subjected to water erosion were proposed and a computational model for erosion depth and risk level in was suggested.

  3. Assessment of Modifications for Improving Navigation at Hilo Harbor, Hawaii

    Science.gov (United States)

    2016-06-01

    of the harbor. A low- frequency surge problem occurs in the interior harbor, caused by waves that reach Piers 1 and 2. According to ship captains...present near the piers and at ADCP1. The amplitude and frequency of IG waves appeared to be more sensitive to dampers assigned to land boundaries...Results also showed the existence of wave energy in low frequencies near the harbor entrance far from the piers where the surge problem has been

  4. A STUDY OF MARINE FOULING IN MONTEREY HARBOR.

    Science.gov (United States)

    PIERS, *FOULING, *HARBORS, *MARINE BIOLOGY, CALIFORNIA, PACIFIC OCEAN, NAVAL RESEARCH, CRUSTACEA, ANIMALS, PERIODIC VARIATIONS, ENVIRONMENTAL TESTS, TIME, DISTRIBUTION, SEA WATER, PLATYHELMINTHES , OCEANOGRAPHIC DATA.

  5. Study on Structure of Arched Longitudinal Beams of Deep Water Wharf

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    High-pile and beam-slab quays have been widely used after several years development. They are mature enough to be one of the most important structural types of wharves in China coastal areas. In order to accommodate large tonnage vessels, wharves should be constructed in deep water gradually. However, conventional high-pile and beam-slab structures are hard to meet the requirements of large deep-water wharf. According to arch's stress characteristics, a new type of wharf with catenary arched longitudinal beams is presented in this paper. The new wharf structure can make full use of arch's overhead crossing and reinforced concrete compression resistance, improve the interval between transverse bents greatly, and decrease underwater construction quantity. Thus, the construction cost cab be reduced. Take the third phase project of the Yangshan Deep-water Port for example, comparative analysis on catenary arched longitudinal beams and conventional longitudinal beams has been made. The result shows that with the same wharf length and width, the same loads and same longitudinal beam moment, catenary arch structure can improve the interval between bents up to 28 m, decrease the number of piles and underwater construction quantity.

  6. 76 FR 47155 - Takes of Marine Mammals Incidental to Specified Activities; Pile-Driving and Renovation...

    Science.gov (United States)

    2011-08-04

    ... plane at which the fixture is directed. Currently, there are lighting poles on the pier. The proposed.... Project Benefits: The existing pier has pole lighting that illuminates the water surface; the proposed... environmental damping or attenuation and thus is produced by a simple inversion square law. The...

  7. 76 FR 28733 - Takes of Marine Mammals Incidental to Specified Activities; Pile-Driving and Renovation...

    Science.gov (United States)

    2011-05-18

    ... going beyond the horizontal plane at which the fixture is directed. Currently, there are lighting poles...: The existing pier has pole lighting that illuminates the water surface; the proposed pier has lighting... thus is produced by a simple inversion square law. The landward attenuation rate assumes a low level...

  8. 33 CFR 165.1709 - Security Zones: Liquefied Natural Gas Tanker Transits and Operations at Phillips Petroleum LNG...

    Science.gov (United States)

    2010-07-01

    ... Gas Tanker Transits and Operations at Phillips Petroleum LNG Pier, Cook Inlet, AK. 165.1709 Section...: Liquefied Natural Gas Tanker Transits and Operations at Phillips Petroleum LNG Pier, Cook Inlet, AK. (a... navigable waters within a 1000-yard radius of the Liquefied Natural Gas (LNG) tankers during their...

  9. 78 FR 57482 - Safety Zone; Fireworks Event in Captain of the Port New York Zone

    Science.gov (United States)

    2013-09-19

    ... Safety waters of the East River Zone south of the Brooklyn 33 CFR 165.160(4.4) Bridge and north of a line drawn from the southwest corner of Pier 3, Brooklyn, to the southeast corner of Pier 6, Manhattan. Date...

  10. 78 FR 26508 - Safety Zone; Fireworks Event in Captain of the Port New York Zone

    Science.gov (United States)

    2013-05-07

    ... East River south CFR 165.160(4.4). of the Brooklyn Bridge and north of a line drawn from the southwest corner of Pier 3, Brooklyn, to the southeast corner of Pier 6, Manhattan. Date: June 11, 2013. Time: 8:30...

  11. Sea-spray aerosol particles generated in the surf zone

    NARCIS (Netherlands)

    Eijk, A.M.J. van; Kusmierczyk‐Michulec, J.T.; Francius, M.J.; Tedeschi, G.; Piazzola,J.; Merritt, D.L.; Fontana, J.D.

    2011-01-01

    To assess the properties of aerosol particles generated over the surf zone, two experiments were held at the pier of Scripps Institution of Oceanography (SIO), La Jolla CA, and at the pier of the U.S. Army Corps of Engineers Field Research Facility (FRF) in Duck NC. On both sites concentrations of s

  12. Coast of California Storm and Tidal Waves Study.

    Science.gov (United States)

    1986-07-01

    morning dives. Then the boat heads towards Scripps Pier (Figure 13). Tom Lorensen joins the team there, swimming out to the boat for the afternoon...Oceanside Pier to south of Agua Hedionda Lagoon VI Batiquitos Lagoon VII San Elijo Lagoon VIII San Dieguito River IX South of Solidad Valley, near Torrey

  13. 考虑支座摩擦和墩柱损伤的桥梁用液体粘滞阻尼器参数确定方法%Parameter determination method for fluid viscous damper used in bridges considering bearing friction and pier damage

    Institute of Scientific and Technical Information of China (English)

    焦驰宇; 张恺; 张连普; 龙佩恒

    2013-01-01

    对桥梁阻尼器参数确定方法的相关文献进行了回顾,指出现有常用参数分析法费时费力;而简化分析法存在仅适用于结构保持在弹性阶段、无法考虑罕遇地震下支座摩擦及墩柱轻度损伤等复杂情况的弊端.以非线性静力分析获得的能力曲线为基础,利用性能点、目标点求解时获得的关键参数,结合等效弹性单自由度体系附加非线性粘滞阻尼器的参数确定公式,提出了考虑支座摩擦和墩柱损伤的桥用阻尼器参数确定方法.将该方法应用于某三跨连续梁桥抗震加固分析,验证了该方法的实用性及准确性.指出了该方法具有的优势及使用时需注意的问题.本文方法可用于中小跨径桥梁抗震加固时液体粘滞阻尼器的参数确定.%By reviewing parameter determination methods for fluid viscous damper ( FVD) applied in structural engineering, the defect of time consuming when using parameter analysis method, and the defect of not considering the bearing friction and other nonlinearity when using normal simplified method were pointed out. A new parameter determinations method which can easily and quickly consider the above effects was proposed. It can be expressed as follows; based on the pushover curve given by nonlinear static analysis, getting the key parameters when calculating performance point and target point, then substituting them into the structural dynamic formula of elastic SDF system with non - linear fluid viscous dampers, the approprite parameter of the viscous damper can be achieved. Taking a seismic retrofitting example of a three-span continuous girder bridge using FVD, the accuracy and practicality of the parameter determination method given in the paper was validated. The advantages and some problems which should be noticed when using this method were given. The parameter determination method can be used in similar seismic retrofit design of medium and small-span bridges when FVD were used.

  14. Dos porões ao cais: memórias da trajetória do sindicato da estiva de Rio Grande-RS nos anos de 1960 a 1970 = Holds of the pier: memories of the path of the union estiva of Rio Grande in the 1960 1970

    Directory of Open Access Journals (Sweden)

    Silva, Thiago Cedrez da

    2014-01-01

    Full Text Available A problemática desta pesquisa consiste na análise da trajetória dos trabalhadores da estiva de Rio Grande, durante o período de 1960 a 1970, perpassando o impacto que o golpe militar de 1964 teve no modo de vida dos estivadores riograndinos. Com tal proposta, visamos identificar as transformações ocorridas no cotidiano desses obreiros, principalmente dos militantes, evidenciando a relação entre o dia a dia dessa classe trabalhadora e sua atividade sindical, bem como o caráter de identificação do “ser estivador”, no período acima mencionado. Será a partir do estudo da memória reavivada dos nossos protagonistas e do dialogo com as demais fontes, que buscaremos compreender os indícios de autonomia e as formas de resistência à dominação a que foi submetido o Sindicato da Estiva de Rio Grande durante o final do regime populista-trabalhista e nos primeiros anos da historicamente, ditadura civil - militar de 1964. Por fim, ao analisar o cotidiano dos estivadores desta cidade, através das fontes e do aporte teórico, entenderemos os aspectos simbólicos que perpassam o “ser estivador” dentro de um rol de categorias de trabalho portuário, bem como a imagem e a representatividade desses obreiros na sociedade Rio-grandina

  15. Pierídeos (Lepidoptera: Pieridae da Coleção de Invertebrados do Instituto Nacional de Pesquisas da Amazônia, INPA Pierid butterflies (Lepidoptera: Pieridae of the Instituto Nacional de Pesquisas da Amazônia, INPA

    Directory of Open Access Journals (Sweden)

    Karla Christiane Ayden Leite

    2007-01-01

    Full Text Available As espécies de Pieridae da Coleção de Invertebrados do Instituto Nacional de Pesquisas da Amazônia foram inventariadas. São registrados 279 indivíduos de 17 espécies e 10 gêneros, todos coletados na Amazônia brasileira.The species of Pieridae of the collection of Invertebrates of the National Institute for Amazonian Research were inventoried. It was registered 279 individuals of 17 species and 10 genera, all collected in the Brazilian Amazonia.

  16. Pathology Informatics Essentials for Residents: A Flexible Informatics Curriculum Linked to Accreditation Council for Graduate Medical Education Milestones.

    Science.gov (United States)

    Henricks, Walter H; Karcher, Donald S; Harrison, James H; Sinard, John H; Riben, Michael W; Boyer, Philip J; Plath, Sue; Thompson, Arlene; Pantanowitz, Liron

    2017-01-01

    -Recognition of the importance of informatics to the practice of pathology has surged. Training residents in pathology informatics has been a daunting task for most residency programs in the United States because faculty often lacks experience and training resources. Nevertheless, developing resident competence in informatics is essential for the future of pathology as a specialty. -To develop and deliver a pathology informatics curriculum and instructional framework that guides pathology residency programs in training residents in critical pathology informatics knowledge and skills, and meets Accreditation Council for Graduate Medical Education Informatics Milestones. -The College of American Pathologists, Association of Pathology Chairs, and Association for Pathology Informatics formed a partnership and expert work group to identify critical pathology informatics training outcomes and to create a highly adaptable curriculum and instructional approach, supported by a multiyear change management strategy. -Pathology Informatics Essentials for Residents (PIER) is a rigorous approach for educating all pathology residents in important pathology informatics knowledge and skills. PIER includes an instructional resource guide and toolkit for incorporating informatics training into residency programs that vary in needs, size, settings, and resources. PIER is available at http://www.apcprods.org/PIER (accessed April 6, 2016). -PIER is an important contribution to informatics training in pathology residency programs. PIER introduces pathology trainees to broadly useful informatics concepts and tools that are relevant to practice. PIER provides residency program directors with a means to implement a standardized informatics training curriculum, to adapt the approach to local program needs, and to evaluate resident performance and progress over time.

  17. Tier-mounted level luffing crane for container handling; Container handling yo tire mount shiki suihei hikikomi kuren

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-04-20

    This level luffing crane was delivered to Iwakuni Port Control Office of Yamaguchi prefecture for container handling. Main specifications: (1) Rated load: 39t for a hook, 30.5t for a spreader, (2) Outrigger layout: 12m in a normal direction, 15m in a traveling direction, (3) Maximum radius: 35m, (4) Minimum radius: 11.5m, (5) Lift: 40m. Features: (1) Possible of loading/unloading works for 20,000DWT class container ships, (2) Possible of loading/unloading works for 32,000DWT class cargo ships, (3) Tier-mounted traveling unit, steering unit with an average swing radius of 35m, and possible position or wharf change work on wharves, (4) Possible of movement between parallel berths apart from each other by 300m by engine power generation. (translated by NEDO)

  18. Offshore system maintenance; Kurs Offshore

    Energy Technology Data Exchange (ETDEWEB)

    Jensen, D.

    2003-12-01

    Offshore wind parks require maintenance and servicing as other wind parks do. Various wharves are currently attempting to cope with this challenge. One example is the SWATH technology (Small Waterplane Area Twin Hull). Ships of this type are commonly used as pilot boats. They have very small bearing surfaces. [German] Offshore-Parks brauchen schwimmende Teams fuer Wartungs- und Servicearbeiten. Und je oefter die Anlagen trotz Wind und Wetter erreichbar sind, desto besser. Verschiedene Werften bereiten sich auf die Herausforderung vor. So z.B. das mit der SWATH-Technik (Small Waterplane Area Twin Hull) konstruierte Tenderschiffe haben sich als wetterfester Zubringer fuer Lotsen bewaehrt SWATH-Schiffe haben kaum noch Auflageflaechen. (orig.)

  19. Ampliación del puerto de Miami, (U.S.A.

    Directory of Open Access Journals (Sweden)

    Volkert, David

    1966-11-01

    Full Text Available As there was no available space in the zones surrounding the existing harbour, and the bay had a number of islands, which could be easily connected with fill soil, it was decided to form a harbour taking advantage of these islands. The planform of the new harbour is rectangular, and the perimeter walls have been used as wharves. As this fill soil is separated from the coastline, a bridge from the mainland has been built, carrying both motor vehicles and rail traffic. In view of the considerable length of the bridge, and the need to ensure navigation along the coastline, the central part of the bridge, over the navigation canal, has an elevating span. To obtain sufficient depth of water by the wharves, considerable amount of dredging has been necessary, as well as sheet piling.Como no se disponía de espacio en las zonas adyacentes al puerto en explotación, y la bahía tenía una serie de Islotes propicios para hacer un relleno, surgió la idea de realizarlo, en tomo a aquéllos, con planta rectangular, aprovechando los muros perimetrales para formar los muelles de atraque. Por hallarse este relleno separado de la costa, se ha construido un paso superior, sobre el agua, para el tráfico de vehículos de ruedas neumáticas, y una plataforma paralela destinada al tráfico ferroviario. Dada la gran longitud del paso y la necesidad de asegurar la navegación costera, la parte central del paso, correspondiente al canal, se salva con un tramo basculante. Para conseguir aguas profundas en los muelles se han realizado importantes operaciones de dragado e hinca de tablestacas.

  20. Dynamic Interaction Behavior between Jumbo Container Crane and Pile-Supported Wharf under NearField and Far-Field Ground Motions

    Directory of Open Access Journals (Sweden)

    J. R. LI

    2016-02-01

    Full Text Available Playing an important role in local and national seaport activities, container wharves are susceptible to structural failure and damage during earthquake events. Therefore, factors that affect the seismic response of crane–wharf structures under different types of earthquake ground motions should be elucidated. In this paper, 3D finite element models were established to investigate the differences of natural vibration characteristics between the wharf and crane–wharf structures. The dynamic response of a typical pile-supported wharf structure and the interaction behavior of a crane and wharf structural system under seismic actions of near-field and far-field ground motions were studied by performing numerical simulation and time-history response analysis. Axial force–moment relation curves were adopted to analyze the elastic–plastic limit state of the wharf structure under different ground motions. Results showed that the consideration of the container crane increased the natural vibration period of the pile-supported wharf structure and affected the dynamic characteristics of the structure. Compared with the far-field earthquake ground motion, the nearfield earthquake exerted a more significant impact on the structural dynamic response that controlled the elastic–plastic limit state. With the presence of a crane, the moment and shear force of the pile-top decreased and the location of the extreme value moved down obviously. The findings demonstrated that considering the crane changed the failure mechanism of the wharf structure, and the eccentric effect of the crane may amplify the dynamic response as the peak ground acceleration increases. The results provide reference for the seismic design and the evaluation of the seismic response of container wharves.

  1. receive signal strength prediction in the gsm band using wavelet ...

    African Journals Online (AJOL)

    user

    A GSM network consists of some functional components, whose function and interface ... problems mentioned above, it is necessary to constantly monitor the GSM signal ..... Progress in. Electromagnetic Research, PIER 59, 151 – 174,. 2006.

  2. Pop / Andri Riid

    Index Scriptorium Estoniae

    Riid, Andri, 1972-

    2008-01-01

    Heliplaatidest: Queen + Paul Rodgers "The Cosmos Rocks", Asian Dub Foundation "Punkara", Kaupo "Õhtud", Monkey "Journey To The West", Late of the Pier "Fantasy Black Channel", Stereolab "Chemical Chords", Fucked Up "The Chemistry of Common Life"

  3. Stiilispikker 50ndad

    Index Scriptorium Estoniae

    2005-01-01

    Lühidalt stiilidest - internatsionaalne, orgaaniline, stalinistlik historitsism, pop-stiil. Tuntud disainerite (Verner Panton, Diego Fortuna, Georg Nelson, Pier Giacomo ja Achille Castiglioni) loomingu näiteid

  4. 78 FR 23555 - Duke Energy Carolinas, LLC; Notice of Application for Amendment of License and Soliciting...

    Science.gov (United States)

    2013-04-19

    ... pushers. The existing facilities consist of three wooden piers, a retaining wall, three gravel loading ramps, and a concrete loading ramp. The additional proposed facility is a gravel loading ramp to be...

  5. Preface. The reasons for a choice: the matching of two research symposia, or of ambiguity

    Directory of Open Access Journals (Sweden)

    Glauco Maria Cantarella

    2010-07-01

    Full Text Available Preface to the conference proceedings Amicitia e monachesimo: fonti, storia, problemi (Fonte Avellana, 29-30 agosto 2009; Nuove ricerche su Pier Damiani e l'XI secolo: bilanci e prospettive (Bologna, 22 gennaio 2010.

  6. 15 CFR Appendix B to Subpart M of... - Zones Within the Sanctuary Where Overflights Below 1000 Feet Are Prohibited

    Science.gov (United States)

    2010-01-01

    ... center point at the end of Moss Landing Pier as it appeared on the most current NOAA nautical charts as... high water out to three nautical miles (NM) between a line extending from Point Santa Cruz on...

  7. LHCb experiment announces the unambiguous observation of an exotic particle

    CERN Multimedia

    2014-01-01

    Short interview to pier Luigi Campana, LHCb spokesperson, and Richard Jacobsson, LHCb physicist, on the unambiguous observation of an exotic particle which cannot be classified within the traditional quark model

  8. 22 CFR 89.1 - Prohibitions on Longshore work by U.S. nationals; listing by country.

    Science.gov (United States)

    2010-04-01

    .... Ireland (a) All longshore activities on pier or on land at port. Israel (a) All longshore activities. (b... related equipment, (2) Opening and closing of hatches, and (3) Rigging of ship's gear. Thailand...

  9. 78 FR 54664 - Center for Scientific Review; Notice of Closed Meetings

    Science.gov (United States)

    2013-09-05

    ... Bishop, Ph.D., Scientific Review Officer, Center for Scientific Review, National Institutes of Health... applications. Place: Pier 5 Hotel, 711 Eastern Avenue, Baltimore, MD 21202. Contact Person: Michael...

  10. 77 FR 42179 - Safety Zone; Fireworks Display, Potomac River, Charles County, Newburg, MD

    Science.gov (United States)

    2012-07-18

    ... Rule Digital Lightning, of Kensington, Maryland, will conduct a fireworks display launched from a barge located on the Potomac River, adjacent to Gilligan's Pier Restaurant, at Newburg in Charles...

  11. Pop / Andri Riid

    Index Scriptorium Estoniae

    Riid, Andri, 1972-

    2008-01-01

    Heliplaatidest: Queen + Paul Rodgers "The Cosmos Rocks", Asian Dub Foundation "Punkara", Kaupo "Õhtud", Monkey "Journey To The West", Late of the Pier "Fantasy Black Channel", Stereolab "Chemical Chords", Fucked Up "The Chemistry of Common Life"

  12. Stiilispikker 50ndad

    Index Scriptorium Estoniae

    2005-01-01

    Lühidalt stiilidest - internatsionaalne, orgaaniline, stalinistlik historitsism, pop-stiil. Tuntud disainerite (Verner Panton, Diego Fortuna, Georg Nelson, Pier Giacomo ja Achille Castiglioni) loomingu näiteid

  13. 48 CFR 1252.217-73 - Inspection and manner of doing work.

    Science.gov (United States)

    2010-10-01

    ... all times while the vessel is berthed alongside the Contractor's pier or in dry dock or on a marine... the vessel is in the custody of the Contractor or in dry dock or on a marine railway and the...

  14. 48 CFR 3052.217-92 - Inspection and manner of doing work (USCG).

    Science.gov (United States)

    2010-10-01

    ... all times while the vessel is berthed alongside the Contractor's pier or in dry dock or on a marine... the vessel is in the custody of the Contractor or in dry dock or on a marine railway and the...

  15. 48 CFR 1352.271-70 - Inspection and manner of doing work.

    Science.gov (United States)

    2010-10-01

    ... contractor's pier or in dry dock or on a marine railway. All tanks or bilge areas under alteration or repair... the custody of the contractor or in dry dock or on a marine railway and the temperature becomes as low...

  16. Environmental Assessment: Disposition of Chiefs’ Circle Residential Structures

    Science.gov (United States)

    2012-04-27

    brick piers that were added in 1986. The buildings are reached by concrete sidewalks at the main façade and asphalt driveways. Four associated one...with brick piers that were added in 1986. The buildings are reached by concrete sidewalks at the main façade and asphalt driveways. Four associated...discuss the possibility of obtaining one of these buildings with the newly- elected mayor and city council in January 20 I 0. City officials have expressed

  17. Numerical simulation on rectifying flow in intake system of a pumping station connected with headrace pipe

    Science.gov (United States)

    Zi, D.; Wang, F. J.; Yao, Z. F.; Xiao, R. F.; Chen, X.; He, C. L.

    2016-11-01

    Pipes are usually adopted in those conditions for which the pump house is far from water source. As for fore-bay, flow of headrace pipe can be considered as jet-flow. Jet-flow has a high velocity, and creates large pressure gradient between jet-flow and near wall flow, which contributes to large scale circulation. In that circumstance, a single rectification measure cannot effectively improve the flow pattern of intake flow field. For large scale pumping station, there is enough space to arrange complex anti-vortex devices. Thus, a new type of combined diversion piers composed of double-I type pier, three-I type pier and cross anti-vortex baffle was proposed. In order to investigate the influences of combined division piers on flow pattern, four cases with different geometry and location parameters are designed. The results of numerical simulation and site tests show that the combined diversion piers could effectively improve the intake flow field of pumping station with headrace pipe. As for pumping station with headrace pipe, the distance between inlet section of fore-bay and leading edge of double-I type diversion pier should be 0.25L-0.53L (where L is the length of fore-bay). The distance between inlet section of fore-bay and trailing edge of double-I type diversion pier should be 0.5L-0.73L. The total length of double-I type pier should be 0.2L-0.25L.

  18. Adolescents’ Self-concept Short Scale: A version of PHCSCS

    OpenAIRE

    Veiga, Feliciano; Leite, António

    2016-01-01

    Problem Statement: The adolescents’ self-concept has remained as a powerful issue in educational context. The lack of assessment instruments, especially in shorted version and with studied psychometric characteristics, has constituted a problem. Purpose of Study: This study presents the construction of “Adolescents’ Self-concept Short Scale” (ASCSS), using the Portuguese adaptation (Veiga & Domingues, 2012) of the Piers-Harris Children's Self-Concept Scale (Piers & Hertzberg, 2002). Res...

  19. Scour and Scour Countermeasures at Bridge Sites

    Institute of Scientific and Technical Information of China (English)

    CHIEW Yee-Meng

    2008-01-01

    This paper examines scour and scour countermeasures at bridge piers and abutments.Abutment scour is by far more complex than its counterpart associated with piers because of the possibility of the presence of a floodplain. Notwithstanding this, the mechanism of scour at both piers and abutments is very similar; moreover, the failure mechanisms associated with both armor-ing and flow-altering countermeasures are not very different. In rivers with a floodplain, abutment scour becomes much more complex. In cases where the abutment ends at or near to the flood-plain, it can initiate bank erosion, which clearly is an important erosion problem that is quite distinct from the customary scour at either an abutment in rivers without a floodplain or a pier. For this rea-son, abutment scour can be very site-specific while pier-scour is more generic in nature. To this end, the ability to identify the type of abutment scour that may form in a particular channel is closely related to an engineer's ability to propose devices for effective scour countermeasure.By summarizing research efforts on using riprap as a pier or abutment countermeasure over the past few decades, this paper highlights the deficiencies of riprap in arresting pier scour. To this end,different failure mechanisms are identified. They are shear failure, winnowing failure, edge failure,bedform-induced failure and bed-degradation induced failure. Each failure mechanism can singly or, more likely, combine to cause the eventual breakdown of the riprap layer. The study shows that a riprap layer is vulnerable to other failure mechanisms even though it is adequately designed against shear failure, rendering it ineffective in arresting scour.

  20. Pathology informatics essentials for residents: A flexible informatics curriculum linked to accreditation council for graduate medical education milestones

    Directory of Open Access Journals (Sweden)

    Walter H Henricks

    2016-01-01

    Full Text Available Context: Recognition of the importance of informatics to the practice of pathology has surged. Training residents in pathology informatics have been a daunting task for most residency programs in the United States because faculty often lacks experience and training resources. Nevertheless, developing resident competence in informatics is essential for the future of pathology as a specialty. Objective: The objective of the study is to develop and deliver a pathology informatics curriculum and instructional framework that guides pathology residency programs in training residents in critical pathology informatics knowledge and skills and meets Accreditation Council for Graduate Medical Education Informatics Milestones. Design: The College of American Pathologists, Association of Pathology Chairs, and Association for Pathology Informatics formed a partnership and expert work group to identify critical pathology informatics training outcomes and to create a highly adaptable curriculum and instructional approach, supported by a multiyear change management strategy. Results: Pathology Informatics Essentials for Residents (PIER is a rigorous approach for educating all pathology residents in important pathology informatics knowledge and skills. PIER includes an instructional resource guide and toolkit for incorporating informatics training into residency programs that vary in needs, size, settings, and resources. PIER is available at http://www.apcprods.org/PIER (accessed April 6, 2016. Conclusions: PIER is an important contribution to informatics training in pathology residency programs. PIER introduces pathology trainees to broadly useful informatics concepts and tools that are relevant to practice. PIER provides residency program directors with a means to implement a standardized informatics training curriculum, to adapt the approach to local program needs, and to evaluate resident performance and progress over time.

  1. Bathymetric and velocimetric surveys at highway bridges crossing the Missouri and Mississippi Rivers near St. Louis, Missouri, May 23–27, 2016

    Science.gov (United States)

    Huizinga, Richard J.

    2017-09-26

    Bathymetric and velocimetric data were collected by the U.S. Geological Survey, in cooperation with the Missouri Department of Transportation, near 13 bridges at 8 highway crossings of the Missouri and Mississippi Rivers in the greater St. Louis, Missouri, area from May 23 to 27, 2016. A multibeam echosounder mapping system was used to obtain channel-bed elevations for river reaches ranging from 1,640 to 1,970 feet longitudinally and extending laterally across the active channel from bank to bank during low to moderate flood flow conditions. These bathymetric surveys indicate the channel conditions at the time of the surveys and provide characteristics of scour holes that may be useful in the development of predictive guidelines or equations for scour holes. These data also may be useful to the Missouri Department of Transportation as a low to moderate flood flow comparison to help assess the bridges for stability and integrity issues with respect to bridge scour during floods.Bathymetric data were collected around every pier that was in water, except those at the edge of water, and scour holes were observed at most surveyed piers. The observed scour holes at the surveyed bridges were examined with respect to shape and depth.The frontal slope values determined for scour holes observed in the current (2016) study generally are similar to recommended values in the literature and to values determined for scour holes in previous bathymetric surveys. Several of the structures had piers that were skewed to primary approach flow, as indicated by the scour hole being longer on the side of the pier with impinging flow, and some amount of deposition on the leeward side, as typically has been observed at piers skewed to approach flow; however, at most skewed piers in the current (2016) study, the scour hole was deeper on the leeward side of the pier. At most of these piers, the angled approach flow was the result of a deflection or contraction of flow caused by a spur dike

  2. Shaking Table Tests of Curved Bridge considering Bearing Friction Sliding Isolation

    Directory of Open Access Journals (Sweden)

    Lei Yan

    2016-01-01

    Full Text Available Specific to severe damage to curved bridges in earthquakes caused by the excessive force of the fixed bearings and piers, a new seismic design method on curved bridges considering bearing friction sliding isolation is proposed in this paper. Seismic model bridge and isolation model bridge with similarity ratio of 1/20 were made and the shaking table comparison test was conducted. The experimental results show that the isolation model curved bridge suffered less seismic damage than the seismic model curved bridge. The fundamental frequencies of the seismic model bridge and isolation model bridge decreased and the damping ratio increased with the increase of seismic intensity. Compared with seismic curved bridge, the maximum reduction rates of peak acceleration along the radial and tangential directions on the top of pier of the isolation model curved bridge were 47.3% and 55.5%, respectively, and the maximum reduction rate of the peak strain on the bottom of pier of the isolation model curved bridge was 43.4%. For the isolation model curved bridge, the maximum reduction rate of peak acceleration on the top of pier was 24.6% compared with that on the bottom of pier. The study results can provide experimental basis for the seismic design of curved bridges.

  3. Effect of nonlinearity of restrainer and supports on the elasto-plastic seismic response of continuous girder bridge

    Directory of Open Access Journals (Sweden)

    Wang Changfeng

    2014-10-01

    Full Text Available During an earthquake, the nonlinearity of the bridge structure mainly occurs at the supports, bridge piers and restrainers. When entering nonlinear stage, members of the bridge structure affect the elasto-plastic seismic response of the whole structure to a certain extent; for multi-span continuous bridges, longitudinal restrainers can be installed on the movable piers to optimise the distribution of seismic force and enable the movable piers to bear a certain amount of seismic effect. In order to evaluate the effect of nonlinearity of restrainer and supports on the elasto-plastic seismic response of continuous girder bridge, analytical models of continuous girder bridge structure considering the nonlinearity of movable supports, restrainers and bridge piers were built and the nonlinear time history analysis was conducted to evaluate the effect of nonlinearity of restraining devices and supports on the elasto-plastic seismic response of continuous girder bridge. Relevant structural measures and recommendation were made to reduce the seismic response of the fixed piers of the continuous girder bridge.

  4. 车—桥碰撞的数值模拟研究%Research on numeric simulation of crash between vehicle and bridges

    Institute of Scientific and Technical Information of China (English)

    邓乙民; 刘吉波

    2012-01-01

    利用有限元分析软件ANSYS/LS-DYNA,建立了汽车—桥墩碰撞的有限元模型,通过对汽车—桥墩的碰撞过程进行数值模拟分析,得到了碰撞过程中的碰撞力、碰撞能量和桥墩墩顶位移,分析了桥墩受撞破坏的机理,对车—桥碰撞研究具有十分重要的意义。%The paper adopts the finite element analysis software,ANSYS/LS-DYNA,establishes the finite element model for the crash between the vehicle and bridge piers,analyzes the numeric simulation the crashing process between the vehicle and bridge piers,achieves the collision force,crashing energy and the displacement of pier top of the bridge piers,and analyzes the mechanism for the damage of the bridge piers,so as to have the important significance for the research on crash between vehicle and bridges.

  5. California Energy Commission Public Interest EnergyResearch/Energy System Integration -- Transmission-Planning Research&Development Scoping Project

    Energy Technology Data Exchange (ETDEWEB)

    Eto, Joseph H.; Lesieutre, Bernard; Widergren, Steven

    2004-07-01

    The objective of this Public Interest Energy Research (PIER)scoping project is to identify options for public-interest research and development (R&D) to improve transmission-planning tools, techniques, and methods. The information presented was gathered through a review of current California utility, California Independent System Operator (ISO), and related western states electricity transmission-planning activities and emerging needs. This report presents the project teams findings organized under six topic areas and identifies 17 distinct R&D activities to improve transmission-planning in California and the West. The findings in this report are intended for use, along with other materials, by PIER staff, to facilitate discussions with stakeholders that will ultimately lead to development of a portfolio of transmission-planning R&D activities for the PIER program.

  6. Two-Dimensional Simulation of Flow and Evaluation of Bridge Scour at Structure A-1700 on Interstate 155 over the Mississippi River near Caruthersville, Missouri

    Science.gov (United States)

    Huizinga, Richard J.

    2007-01-01

    The evaluation of scour at bridges throughout the State of Missouri has been ongoing since 1991, and most of these evaluations have used one-dimensional hydraulic analysis and application of conventional scour depth prediction equations. Occasionally, the complex conditions of a site dictate a more thorough assessment of the stream hydraulics beyond a one-dimensional model. This was the case for structure A-1700, the Interstate 155 bridge crossing the Mississippi River near Caruthersville, Missouri. To assess the complex hydraulics at this site, a two-dimensional hydrodynamic flow model was used to simulate flow conditions on the Mississippi River in the vicinity of the Interstate 155 structure A-1700. The model was used to simulate flow conditions for three discharges: a flood that occurred on April 4, 1975 (the calibration flood), which had a discharge of 1,658,000 cubic feet per second; the 100-year flood, which has a discharge of 1,960,000 cubic feet per second; and the project design flood, which has a discharge of 1,974,000 cubic feet per second. The project design flood was essentially equivalent to the flood that would cause impending overtopping of the mainline levees along the Mississippi River in the vicinity of structure A-1700. Discharge and river-stage readings from the flood of April 4, 1975, were used to calibrate the flow model. The model was then used to simulate the 100-year and project design floods. Hydraulic flow parameters obtained from the three flow simulations were applied to scour depth prediction equations to determine contraction, local pier, and abutment scour depths at structure A-1700. Contraction scour and local pier scour depths computed for the project design discharge generally were the greatest, whereas the depths computed for the calibration flood were the least. The maximum predicted total scour depth (contraction and local pier scour) for the calibration flood was 66.1 feet; for the 100-year flood, the maximum predicted total

  7. Examination of Interaction Spring and Damping Model connecting Ground and Piled Foundations in Liqueaction Ground

    Science.gov (United States)

    Okada, Yoshihisa; Ogawa, Yoshimi

    There are many bridges in lowland areas in East Tokyo and soft ground in Tokyo Bay Coast. A bare possibility is that these structures might suffer disastrous damage due to liquefaction when the area is hit by a large earthquake. In this paper, interaction spring and damping model considering a process of liquefaction and relationship between natural period of ground and pier are proposed, and it is verified by using the dynamic centrifugal model test in level 2 earthquake motion. As the result, it is verified that the response of pier and footing behaviors of the test and the analysis can be well corresponded, the interaction spring and damping model considering the process of liquefaction and the relationship between natural period of ground and pier is suitable for the purpose.

  8. 城市桥梁被车辆撞击后损伤分析%Analysis on Damage of Urban Bridges Caused by Vehicle Collision

    Institute of Scientific and Technical Information of China (English)

    裴小吟; 文传勇; 张永水

    2011-01-01

    The stress state of the bridge pier under the collision of heavy vehicles with different speeds, and the collision mechanism of vehicle and bridge are mainly studied. The simulation analysis of piers and vehicles is carried out on the basis of the general finite element program ABAQUS. The plain concrete three-dimensional entity model is used as the pier model. The nonlinearity of concrete material is fully considered and reinforced steel is calculated with the consideration of liner elasticity. Ordinary steel entity model is used as the vehicle model, without the consideration of the impact on the vehicles in the collision. Simulated analyses which aim at the situation of vertical impact on the pier caused by different vehicles with three different speeds are carried out. Analyses show that the stress of the pier's collision point is firstly increased with the increase of time, and then the stress will decrease when it reaches the maximum value. This characteristic conforms to the plastic destruction law of the concrete. Meanwhile, analyses also show that the higher the vehicle speed is, the larger the stress and displacement of the pier reaches.%通过研究城市桥梁中当桥墩在重型车辆撞击下的受力状态及车-桥的碰撞机理,采用有限元软件ABAQUS对3种不同车速车辆垂商撞击桥墩的情况进行了模拟分析.分析表明:桥墩被撞击位置处的应力先随时间的增加而增大,达到最大值时,既又随之减小,符合混凝土的弹塑性破坏;并且车速越大,桥墩局部达到的应力及位移也越大.

  9. Measurement of Unit Effectiveness in Marine Corps Infantry Battalions. Appendices

    Science.gov (United States)

    1978-10-31

    whose military experience also contributed greatly to the project. Historical work was also undertaken by Dr. Paul Davis, COL, USA(Ret), and Messrs...straight across the island. 3/2 was to secure GREEN BEACH (via land) while 2/8 cleaned out a pocket at the .. Burns- Philp Pier on the left flank of...strong-points near the Burns- Philps Pier. (For 1800 positions, see Map 3.) 2/ 1 (plus 2/2) enlarged the south shore beachhead and made a limited

  10. Further ecological and shoreline stability reconnaissance surveys of Back Island, Behm Canal, Southeast Alaska

    Energy Technology Data Exchange (ETDEWEB)

    Young, J.S.; Strand, J.A.; Ecker, R.M.

    1987-09-01

    A diver reconnaissance of the intertidal and subtidal zones of Back Island was performed to catalog potentially vulnerable shellfish, other invertebrates, and marine plant resources occurring at three proposed alternate pier sites on the west side of Back Island. Additionally, a limited survey of terrestrial vegetation was conducted in the vicinity of one of the proposed alternate pier sites to describe the littoral community and to list the dominant plant species found there. Finally, a reconnaissance survey of the shoreline of Back Island was conducted to evaluate potential changes in shoreline stability resulting from construction of onshore portions of the Southeast Alaska Acoustic Measurement Facility (SEAFAC).

  11. Preservação patrimonial, turismo cultural e transformação da base econômica local: pioneirismos, paradoxos e retrocessos em Wigan, Inglaterra

    OpenAIRE

    2013-01-01

    O objeto de estudo é a transformação do Wigan Pier, conjunto arquitetônico e paisagístico localizado às margens do Canal Leeds-Liverpool, em um centro de lazer, turismo e entretenimento, nos anos 1980, dentro de políticas públicas voltadas à transformação da base econômica local. O artigo apresenta dois objetivos principais, a saber: a) compreender e avaliar essa transformação do Wigan Pier nos quesitos de preservação patrimonial, educação patrimonial e ressemantização de bens cul...

  12. MULTIPHASE BLASTING OF THE BRIDGE ACROSS THE DRENICA RIVER

    Directory of Open Access Journals (Sweden)

    Branko Božić

    1989-12-01

    Full Text Available The construction of new bridges on the sites of the existing ones require demolition of the old bridge. Due to closeness of newly erected bridge elements the fundations of old bridges are demolished by multiphase blasting process. The blasting of the piers and anchorages of the bridge across 'the Drenica river carrying the Balačevac—Goleš industrial railway was done in four phases. The piers and anchorages of a new bridge and its construction elements have been erected before (the paper is published in Croatian.

  13. Aerodynamic stability of cable-stayed bridges under erection

    Institute of Scientific and Technical Information of China (English)

    ZHANG Xin-jun; SUN Bing-nan; XIANG Hai-fan

    2005-01-01

    In this work, nonlinear multimode aerodynamic analysis of the Jingsha Bridge under erection over the Yangtze River is conducted, and the evolutions of structural dynamic characteristics and the aerodynamic stability with erection are numerically generated. Instead of the simplified method, nonlinear multimode aerodynamic analysis is suggested to predict the aerodynamic stability of cable-stayed bridges under erection. The analysis showed that the aerodynamic stability maximizes at the relatively early stages, and decreases as the erection proceeds. The removal of the temporary piers in side spans and linking of the main girder to the anchor piers have important influence on the dynamic characteristics and aerodynamic stability of cable-stayed bridges under erection.

  14. No Definite Evidence for Human Endogenous Retroviral HERV-W and HERV-H RNAS in Plasma of Latvian Patients Suffering from Multiple Sclerosis and Other Neurological Diseases / Nav Apstiprinošu Pierādījumu Par Endogēno Retrovīrusu HERV-W Un HERV-H Rns Sastopamību Latvijas Pacientu Ar Multiplo Sklerozi Un Citām NeiroloĢiskām Slimībām Asins Plazmā

    Directory of Open Access Journals (Sweden)

    Užameckis Dmitrijs

    2016-08-01

    Full Text Available Multiple sclerosis (MS is a neurological disease of unknown aetiology. Several research groups reported an increased level of human endogenous retroviruses HERV-W and HERV-H RNAs in cerebrospinal fluid, plasma and supernatants of cell cultures from MS individuals. To quantify the abundance of extracellular virion-associated HERV, RNAs in blood, plasma samples from Latvian MS patients, patients with other neurological diseases (OND, as well as blood donors (BD, were retrospectively studied by using both our previously published and newly developed quantitative Real-time reverse transcription PCR assays (QPCRs targeting different polymerase (pol gene regions of HERV-W and HERV-H. Unspecific signals due to incomplete removal of DNA were monitored by running the assays with and without reverse transcription (RT± in parallel. According to our score, a few MS, OND and healthy controls gave borderline signals simultaneously with both newly developed HERV-H and HERV-W QPCRs, but the rest were negative. All borderline positive samples also had small amounts of non-retroviral cellular mRNA with possible origin from cell-free circulating RNA fragments, apoptotic bodies or exosomes, which can mimic the previously described virus-like particles. The results do not confirm the previous reports on prevalence of HERV-H or -W virion-associated RNA in plasma of MS patients.

  15. Sea floor engineering geomorphology: recent achievements and future directions

    Science.gov (United States)

    Prior, David B.; Hooper, James R.

    1999-12-01

    New mapping technology is providing perspectives of the sea floor "as if there were no ocean", revealing that ocean floors exhibit a wide variety of relief, sediment properties, and active geologic processes such as erosion, faulting, fluid expulsion, and landslides. The development of coastal and offshore resources, such as oil and gas and minerals, involves sea floor engineering in remote, complex, and sometimes hazardous environments. Optimum engineering design and construction practice require detailed surveys of sea floor geomorphology, geologic conditions on the sea bed and to various depths beneath it, combined with geotechnical properties of the sediments and oceanographic information. Integrated site survey models attempt to predict conditions and process frequencies and magnitudes relevant to the engineering design lifetimes of sea floor installations, such as cables, pipelines, production platforms, as well as supporting coastal infrastructure such as jetties, wharves, bridges and harbors. Recent use of deep water areas for oil and gas production, pipelines, and cable routes are also showing that the "world's greatest slopes", beyond the continental shelves contain exciting, exotic, and enigmatic geomorphological features and processes. Safe and cost-effective engineering use of these regions depends upon exciting new technical and conceptual advances for understanding sea floor geomorphology — a task which has barely begun.

  16. The sensory innervation of the human pharynx: searching for mechanoreceptors.

    Science.gov (United States)

    de Carlos, F; Cobo, J; Macías, E; Feito, J; Cobo, T; Calavia, M G; García-Suárez, O; Vega, J A

    2013-11-01

    The coordinate neural regulation of the upper airways muscles is basic to control airway size and resistance. The superior constrictor pharyngeal muscle (SCPM) forms the main part of the lateral and posterior walls of the pharynx and typically is devoid of muscle spindles, the main type of proprioceptor. Because proprioception arising from SCPM is potentially important in the physiology of the upper airways, we have investigated if there are mechanical sensory nerve endings substitute for the muscle spindles. Samples of human pharynx were analyzed using immunohistochemistry associated to general axonic and Schwann cells markers (NSE, PGP 9.5, RT-97, and S100P), intrafusal muscle fiber markers, and putative mechanical sense proteins (TRPV4 and ASIC2). Different kinds of sensory corpuscles were observed in the pharynx walls (Pacini-like corpuscles, Ruffini-like corpuscles, spiral-wharves nerve structures, and others) which are supplied by sensory nerves and express putative mechanoproteins. No evidence of muscle spindles was observed. The present results demonstrate the occurrence of numerous and different morphotypes of sensory corpuscles/mechanoreceptors in human pharynx that presumably detect mechanical changes in the upper airways and replace muscle spindles for proprioception. Present findings are of potential interest for the knowledge of pathologies of the upper airways with supposed sensory pathogenesis.

  17. DISTRIBUTION OF BACTERIA IN SHELLFISH CULTURE AREA AROUND QINGDAO

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    Bacteria numbers in water of coastal shellfish culture area around Qingdao were examined in April, August and October 1998 respectively. The results showed that the total numbers of heterotrophic and coliform bacteria in waters of the area and the specific geographical area varied with seasons. The highest populations were recorded during summer, I.e. 1.0×104~4.5×106cell/ml and 3.0×100~2.4×103cell/100ml, and with average values of 1.61×105cell/ml and 1.24×102cell/100ml respectively. The second highest populations occurred in autumn, and the lowest were in spring. The numbers of coliform bacteria were relatively low in waters near the mouths of bays and open part of the shellfish culture area, while those in waters near the estuaries of big rivers, wharves, navigation routes or the area in front of downtown areas were much higher than other areas. Single-index assessment of the environment quality of shellfish culture was made to indicate that the water sanitary quality in most of these areas are very good, however, some parts were serious polluted by the faeces of warm-blood animals. These results provided theoretical reference for the programming and organizing of shellfish culture.

  18. Seismic Demands for Pile-Supported Wharf Structures with Batter Piles

    Directory of Open Access Journals (Sweden)

    Rouhollah Amirabadi

    2012-09-01

    Full Text Available This study develops an optimal Probabilistic Seismic Demand Model (PSDM for pile-supported wharves whit batter plies. Four bins with twenty non-near-field ground motions and three typical pile-supported wharf structures from western United States ports are used to determine an optimal PSDM by using Probabilistic Seismic Demand Analysis (PSDA. PSDA is used to compute the relationship between Engineering Demand Parameters (EDPs and earthquake Intensity Measures (IMs. An optimal PSDM should be practical, sufficient, effective and efficient-all tested through several IM-EDP pairs. It has been found that for these types of structures, the optimal model comprises a spectral IM, such as spectral acceleration and one of several EDPs. These EDPs are considered for local (moment curvature ductility factor, intermediate (displacement ductility factor and horizontal displacement of embankment and global (differential settlement between deck and behind land response quantities. The considered PSDMs are a critical component in performance-based seismic design and seismic risk assessment. Results can be used in probabilistic framework for performance-based design developed by Pacific Earthquake Engineering Research (PEER center.

  19. 76 FR 11516 - Steel Erection; Extension of the Office of Management and Budget's (OMB) Approval of Information...

    Science.gov (United States)

    2011-03-02

    ... with written notification that the concrete in the footings, piers, and walls, or the mortar in the... to support loads imposed during steel erection. Note: This is not and will not be enforced for mortar... 1995 (44 U.S.C. 3506 et seq.) and Secretary of Labor's Order No. 4-2010 (75 FR 55355). Signed...

  20. 77 FR 44472 - Safety Zone; Port Valdez, Alaska Maritime Highway System Ferry Terminal

    Science.gov (United States)

    2012-07-30

    ... AMHS Ferry Terminal. This safety zone is necessary to provide for the safety of passenger vessels and... the ferry is within 200-yards of the pier. Persons desiring to transit within these safety zones must... is necessary to protect all vessels operating in the vicinity of the AMHS Ferry Terminal. The safety...

  1. Historical Bibliography of Sea Mine Warfare

    Science.gov (United States)

    1976-01-01

    r.) Pier Filippo Lupinacoi, 1966; Roma . 487 p. 11. Marine Mines (Their Purpose: How They Are. Planted and How Destroyed); Scientific American...Yale University Press, Vol. II 1914; New Haven. 14. Stokes, Donald; Lee Mines Magnetiquee Auraient pu Faire Perdue Za Guerre aux Allies; " Historia

  2. Baltoscandal tuleb "Häältega" / Inna Grünfeldt

    Index Scriptorium Estoniae

    Grünfeldt, Inna, 1961-

    2005-01-01

    8.-9. dets. on Rakvere teatris Johan Simonsi lavastus "Hääled" mille autor on Itaalia režissöör ja kirjanik Pier Paolo Pasolini. Neljas rollis belgia-hollandi näitleja Jeroen Willems. Samadel päevadel oli Rakveres 28.06.-2.07.2006 toimuva teatrifestivali tutvustus

  3. Tulev aasta toob kaheksanda "Baltoscandali" / M. T.

    Index Scriptorium Estoniae

    M. T.

    2005-01-01

    8.-9. dets. on Rakvere teatris Johan Simonsi lavastus "Hääled" mille autor on Pier Paolo Pasolini. Neljas rollis belgia-hollandi näitleja Jeroen Willems. Samadel päevadel on Rakveres 28.06.-2.07.2006 toimuva teatrifestivali tutvustus

  4. New records of sabellids and serpulids (Polychaeta: Sabellidae, Serpulidae) from the Tropical Eastern Pacific

    DEFF Research Database (Denmark)

    Rolando Bastida-Zavala, J.; Rodriguez Buelna, Alondra Sofia; Angel De Leon-Gonzalez, Jesus

    2016-01-01

    in the large expanse of the central and southern Mexican Pacific. Thus, sabellids and serpulids were collected from several shallow water habitats along the coast of Mexican Pacific, such as coastal lagoons, coral reefs, rocky shores and from man-made structures as marinas, piers and ships of several harbors...

  5. Is Art Everywhere? : Barclay reklaamikampaania maskeerub kunstiks / Heie Treier

    Index Scriptorium Estoniae

    Treier, Heie, 1963-

    1998-01-01

    Reklaamimaailma ja kunsti suhted. Kunstisponsorlus kui varjatud sigaretireklaam. Barclay reklaamikampaania raames 25. juulil Pärnus toimunud kehamaalingute aktsioon. Kuraator Ene-Liis Semper, osalesid Marko Laimre, Kiwa, Jasper Zoova, Tarrvi Laamannn. 'Art is Everywhere' sündmuste generaator Eestis - Pier Li (rühmituse [21E67] liige)

  6. 7 CFR Exhibit B-2 to Subpart I of... - Breakdown of Construction Development for Determining Percentage Construction Completed

    Science.gov (United States)

    2010-01-01

    ... earth to allow the construction of a foundation or basement. 2. Footing, Foundations, columns 8 8 11 Footing: Construction of the spreading course or courses at the base or bottom of a foundation wall, pier, or column. Foundation: Construction of the supporting portion of a structure below the first...

  7. Kommunikatsioon ei ole vaid sõnum / Alfredo Jaar ; intervjueerinud Maria-Kristiina Soomre ja Reet Varblane

    Index Scriptorium Estoniae

    Jaar, Alfredo, 1956-

    2010-01-01

    Tšiili nüüdiskunstnik Alfredo Jaar, kes esitles 14. aprillil Kumu auditooriumis oma filmi itaalia filmirežissöörist ja kirjanikust Pier Paolo Pasolinist "Pasolini tuhk" (USA, 2009), endast, oma loomingust, eri arengutasemega maade kunstnike osalemisest biennaalidel, kunstniku sõltumatusest, praeguse kunsti ja publiku lõhest, kunstiteose kommunikatiivsusest, maailma muutmisest kunsti abil jm.

  8. Anghel Saligny : Omul şi Monumentul

    Directory of Open Access Journals (Sweden)

    Iulia Băjenaru

    2012-03-01

    Full Text Available Anghel Saligny was a remarcable engineer, world wide predecessor of metal building science and reinforced concrete, creator of multiple inventions and of unique solutions in designing and building bridges, industrial constructions, for the foundation of port piers and docks, as well as grain silos through the use of precast concrete, all of these in world premiere.

  9. 76 FR 26721 - Re-Issuance of a General Permit to the National Science Foundation for the Ocean Disposal of Man...

    Science.gov (United States)

    2011-05-09

    ... western terminus of the Antarctic Peninsula; and Amundsen-Scott Station, at the geographic South Pole. Mc...-Made Ice Piers From McMurdo Station in Antarctica; Proposed Permit AGENCY: Environmental Protection... base at McMurdo Station in Antarctica. This ocean dumping permit had a term of seven years. It...

  10. The Faults of the Generals: How Great Britain Lost the War for America

    Science.gov (United States)

    2011-12-01

    creation of the United States of America. 1 Niccolò Machiavelli, The Prince, trans. W.K. Marriot (New...Niccolò. The Prince. Translated by W.K. Marriot . New York: Alfred A. Knopf, 1908. Mackesy, Piers. The War for America, 1775–1783. Lincoln, Nebraska

  11. Tokyos avati uus kunstimuuseum / Rael Artel

    Index Scriptorium Estoniae

    Artel, Rael, 1980-

    2003-01-01

    Kunstimuuseum asub Roppong Hilli kvartalis 54-korruselise pilvelõhkuja tipus. Hoone projekteeris ameerika arhitekt Richard Gluckman. Muuseumi juhib David Elliott. Kinnisvaraarendaja Minoru Mori kollektsioonita muuseumi eesmärgist, D. Elliotti ja Pier Luigi Tazzi kureeritud avanäitusest "Happiness" ja näituseplaanidest

  12. 18 CFR 1304.200 - Scope and intent.

    Science.gov (United States)

    2010-04-01

    ... CONSTRUCTION IN THE TENNESSEE RIVER SYSTEM AND REGULATION OF STRUCTURES AND OTHER ALTERATIONS TVA-Owned... facilities, specifically the construction of docks, piers, boathouses (fixed and floating), retaining walls, and other structures and alterations, including channel excavation and vegetation management, on or...

  13. Tokyos avati uus kunstimuuseum / Rael Artel

    Index Scriptorium Estoniae

    Artel, Rael, 1980-

    2003-01-01

    Kunstimuuseum asub Roppong Hilli kvartalis 54-korruselise pilvelõhkuja tipus. Hoone projekteeris ameerika arhitekt Richard Gluckman. Muuseumi juhib David Elliott. Kinnisvaraarendaja Minoru Mori kollektsioonita muuseumi eesmärgist, D. Elliotti ja Pier Luigi Tazzi kureeritud avanäitusest "Happiness" ja näituseplaanidest

  14. Systems and methods for wave energy conversion

    Energy Technology Data Exchange (ETDEWEB)

    MacDonald, Daniel G.; Cantara, Justin; Nathan, Craig; Lopes, Amy M.; Green, Brandon E.

    2017-02-28

    Systems for wave energy conversion that have components that can survive the harsh marine environment and that can be attached to fixed structures, such as a pier, and having the ability to naturally adjust for tidal height and methods for their use are presented.

  15. A Microscopic Model for the Liquid Metal - Ionic Solution Interface.

    Science.gov (United States)

    1983-02-10

    Chemistry 1. Laboratoire de Physique des Liquides et Electrochimie , Universite Pierre et Marie Curie, 4 place Jussieu, 752?0 PARIS CEDEX 05, FRANCE...Laboratoire de Physique des Liquides et Electrochimie , Universita Pie=re at Marie Curie, 4 place Jussieu, 75230 PARIS CEDEX 05, FRANCE. F. VERICAI 0

  16. Restructuring of the Electricity Industry and Environmental Issues: A California Research Program

    Directory of Open Access Journals (Sweden)

    Edward L. Vine

    2001-01-01

    Full Text Available As part of the restructuring of the electricity industry in many states, public benefits funding has emerged as a primary mechanism for supporting social benefits such as energy efficiency and research and development (R&D. In California, a Public Interest Energy Research (PIER Program was established to �conduct public interest energy research that seeks to improve the quality of life for California�s citizens by providing environmentally sound, safe, reliable, and affordable energy services and products. PIER includes the full range of research, development, and demonstration activities that will advance science or technology not adequately provided by competitive and regulated markets.� The PIER Program is comprised of six PIER Program funding areas, including the Energy-Related Environmental Research. The overall mission of the Energy-Related Environmental Research is to �Develop cost-effective approaches to evaluating and resolving environmental effects of energy production, delivery, and use in California, and explore how new energy applications and products can solve environmental problems.� This paper describes the process used in developing these approaches and identifies a set of environmental issues that the State plans to evaluate.

  17. Ferrocement as a Material

    DEFF Research Database (Denmark)

    Jensen, Jens Kristian Jehrbo

    FERROCEMENT is not a new material. In 1850 Jean Louis Lambot took out a patent on FERCIMENT, and in 1930's Pier Luigi Nervi created FERROCEMENT. In this report the structure (meshes, rods and mortar) and composition (diameter and widths of meshes and rods, water/cement ratio, aggregat e/ cement...

  18. Electrical pulses protect concrete

    NARCIS (Netherlands)

    Van Kasteren, J.

    2006-01-01

    Even concrete is not as hard as it looks. Sea water, salt on icy roads, and indirectly even carbon dioxide from the air can corrode the steel of the reinforcing bars and so threaten the strength and integrity of a bridge pier, jetty, or viaduct. Dessi Koleva, a chemical engineer from Bulgaria, spent

  19. 33 CFR 110.84 - Black Rock Channel opposite foot of Porter Avenue, Buffalo, N.Y.

    Science.gov (United States)

    2010-07-01

    ... of Porter Avenue, Buffalo, N.Y. 110.84 Section 110.84 Navigation and Navigable Waters COAST GUARD... Channel opposite foot of Porter Avenue, Buffalo, N.Y. An area extending northwesterly between Black Rock Channel and Bird Island Pier opposite the foot of Porter Avenue, bounded as follows: Beginning at...

  20. Understanding Propaganda: The Epistemic Merit Model and its Application to Art

    Science.gov (United States)

    Ross, Sheryl Tuttle

    2002-01-01

    Pablo Picasso's "Guernica," Francisco de Goya's "Fifth of May," Eugene Delacroix's "Liberty Leading the People," George Orwell's "Road to Wigan Pier," Leni Riefenstahl's "Triumph of the Will," and D. W. Griffith's "Birth of a Nation," are all examples of expressly political art. Historically some art has been not only an object of aesthetic…

  1. Demonstration/Validation of a Surface Cleaning Control Practice to Mitigate Storm Water Metal Contaminants

    Science.gov (United States)

    2014-04-01

    sites. Effective removal of contaminant loads can be used in meeting requirements under Total Maximum Daily Load compliance scenarios and potentially... scenarios . The technical approach to evaluate the effectiveness of particle, copper, and zinc removal was to measure their amounts collected and...scaffolding, metal piping and connectors, trailers, miscellaneous hardware; and 55-gal drums and wooden crates /wood storage. Additionally, the piers

  2. Demonstration/Validation of a Surface Cleaning Control to Mitigate Storm Water Metal Contaminants

    Science.gov (United States)

    2014-04-01

    sites. Effective removal of contaminant loads can be used in meeting requirements under Total Maximum Daily Load compliance scenarios and potentially... scenarios . The technical approach to evaluate the effectiveness of particle, copper, and zinc removal was to measure their amounts collected and...scaffolding, metal piping and connectors, trailers, miscellaneous hardware; and 55-gal drums and wooden crates /wood storage. Additionally, the piers

  3. 77 FR 19573 - Safety Zone; Wedding Fireworks Display, Boston Inner Harbor, Boston, MA

    Science.gov (United States)

    2012-04-02

    ... the January 17, 2008, issue of the Federal Register (73 FR 3316). Public Meeting We do not now plan to... Harbor, Boston, MA AGENCY: Coast Guard, DHS. ACTION: Notice of proposed rulemaking. SUMMARY: The Coast... in the vicinity of Anthony's Pier 4, Boston, MA for a wedding fireworks display. This...

  4. Excellence in the Surface Navy.

    Science.gov (United States)

    1984-06-01

    they were steamers and not "pier queens ." We heard ycung sailors just as frequently as we heard captains and department heads say that the ship performed...wher=is. others washed their hands of the details almost exclusiveiy. One captain took bride in relating that he did not maintain a single file in

  5. PALM KERNEL SHELL AS AGGREGATE FOR LIGHT

    African Journals Online (AJOL)

    of cement, sand, gravel andpalm kernel shells respectively gave the highest compressive strength of ... Keywords: Aggregate, Cement, Concrete, Sand, Palm Kernel Shell. ... delivered to the jOb Slte in a plastic ... structures, breakwaters, piers and docks .... related to cement content at a .... sheet and the summary is shown.

  6. 24 CFR 3285.5 - Definitions.

    Science.gov (United States)

    2010-04-01

    .... Pilings, columns, footings, piers, foundation walls, shims, and any combination thereof that, when... wood; manufactured concrete stands; concrete blocks; and portions of foundation walls. Ramada. Any... determined by dividing the ultimate load of a component or system by an appropriate factor of safety. ...

  7. Selecting Your First Telescope.

    Science.gov (United States)

    Harrington, Sherwood

    1982-01-01

    Designed for first-time telescope purchasers, provides information on how a telescope works; major telescope types (refractors, reflectors, compound telescopes); tripod, pier, altazimuth, and equatorial mounts; selecting a telescope; visiting an astronomy club; applications/limitations of telescope use; and tips on buying a telescope. Includes a…

  8. 77 FR 16198 - Safety & Security Zones; OPSAIL 2012 Connecticut, Thames River, New London, CT

    Science.gov (United States)

    2012-03-20

    ... for Comments'' portion of the SUPPLEMENTARY INFORMATION section below for instructions on submitting... fireworks will be launched from two barges anchored in the Thames River adjacent to New London City Pier... all foreign naval vessels while underway, anchored, or moored while on the navigable waters of...

  9. Degradation of Waterfront Reinforced Concrete Structures

    African Journals Online (AJOL)

    Key words: Degradation, reinforced concrete, Dar es Salaam port. Abstract—One of the .... Plate 2. Typical cracks on concrete piers found on berth. 4 through 8. Plate 3. Exposed .... Rubaratuka, I. A. and Mulungu, D., 1999: Defects in reinforced ...

  10. Stockholmi Moodsa Kunsti Muuseumi uus elu / Reet Varblane

    Index Scriptorium Estoniae

    Varblane, Reet, 1952-

    1998-01-01

    Stockholmi Moodsa Kunsti Muuseumist, mille Stockholmi südalinnas Skeppsholmeni saarel asuvas uues, spetsiaalselt kaasaegse kunsti näitamiseks ja hoidmiseks projekteeritud hoones (arhitekt Rafael Moneo) avati 14. veebr. kunsti-, foto- ja arhitektuurimuuseum. Muuseumi ajaloost, eesmärkidest. Moderna Museet'i direktori David Eliott'i esimesest kuraatoritööst (koos Pier Luigi Tazziga) "Haavad".

  11. 33 CFR 165.166 - Safety Zone: Macy's July 4th Fireworks, East River, NY.

    Science.gov (United States)

    2010-07-01

    ... faces on the east bank of the East River between the Williamsburg Bridge and North 9th Street, Brooklyn... southwest corner of Pier 9A, Brooklyn; south of a line drawn from East 47th Street, Manhattan through the... Bascule Bridge. (b) Activation period. This section is activated annually from 6:30 p.m. until 11:30 p.m...

  12. 78 FR 23515 - Regulated Navigation Areas, Security Zones: Dignitary Arrival/Departure and United Nations...

    Science.gov (United States)

    2013-04-19

    ..., Brooklyn; and south of a line drawn between 40 42'14.8'' N, 074 00'20.3'' W (Wall Street, Manhattan), and the northwest corner of Pier 2 North, Brooklyn (NAD 1983). (2) Randalls and Wards Islands RNA: All waters of the East River between the Hell Gate Rail Road Bridge (mile 8.2), and a line drawn from a point...

  13. Ocean Electric Field for Oceanography and Surveillance

    Science.gov (United States)

    2014-10-27

    surface boundary layer, J. Phys. Oceanogr., 38(3), 648-669. Lien, R.-C., and T. B. Sanford (2009). Vorticity and turbulence in a wake of bridge pier...AND ADDRESS(ES) University of Washington – Applied Physics Laboratory 8. PERFORMING ORGANIZATION REPORT NUMBER 4333 Brooklyn

  14. 77 FR 55777 - Security Zones; Dignitary Arrival/Departure and United Nations Meetings, New York, NY

    Science.gov (United States)

    2012-09-11

    ..., Brooklyn; and south of a line drawn between 40 42'14.8'' N, 074 00'20.3'' W (Wall Street, Manhattan), and the northwest corner of Pier 2 North, Brooklyn (NAD 1983). (2) Randalls and Wards Islands: All waters of the East River between the Hell Gate Rail Road Bridge (mile 8.2), and a line drawn from a point at...

  15. De Koraalriffen van Emmahaven (W. Sumatra)

    NARCIS (Netherlands)

    Umbgrove, J.H.F.

    1931-01-01

    In the bay of Emmahaven near Padang (W. Sumatra) is a small coral reef. On the North side of this reef a small, sandy island occurs called Pasir Ketjil. It has lately been surrounded by brick walls, besides which a stone pier has been built in a S.W. direction (cf. fig. 1, a map of 1899 and fig. 2

  16. 24 CFR 3285.312 - Footings.

    Science.gov (United States)

    2010-04-01

    ... MODEL MANUFACTURED HOME INSTALLATION STANDARDS Foundations § 3285.312 Footings. (a) Materials approved... density. A footing must support every pier. Footings are to be either: (1) Concrete. (i) Four inch nominal... requirements when frame blocking only is used. 2. In addition to blocking required by § 3285.311, see Table...

  17. Tradesmen, Traitors, Pirates, and Prostitutes: Depictions of the Flemish in Later Medieval England

    Science.gov (United States)

    Schwamb, Sara M. B.

    2010-01-01

    This study examines the depictions of the Flemish in Chaucer's "The Canterbury Tales", Langland's "Piers Plowman", several historical chronicles including The Brut continuations, poetic works such as "The Libelle of Englysh Polycye", additional short poems dealing directly with events of the Hundred Years' War, and excerpts from the Paston family…

  18. 76 FR 37650 - Safety Zone; 4th of July Festival Berkeley Marina Fireworks Display Berkeley, CA

    Science.gov (United States)

    2011-06-28

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; 4th of July Festival Berkeley Marina... Berkeley Pier, Berkeley, CA in support of the 4th of July Festival Berkeley Marina Fireworks Display... used in the fireworks display. Background and Purpose The City of Berkeley Marina will sponsor the 4th...

  19. Tradesmen, Traitors, Pirates, and Prostitutes: Depictions of the Flemish in Later Medieval England

    Science.gov (United States)

    Schwamb, Sara M. B.

    2010-01-01

    This study examines the depictions of the Flemish in Chaucer's "The Canterbury Tales", Langland's "Piers Plowman", several historical chronicles including The Brut continuations, poetic works such as "The Libelle of Englysh Polycye", additional short poems dealing directly with events of the Hundred Years' War, and…

  20. 77 FR 46427 - Notice of Availability for the Draft Environmental Impact Statement/Environmental Impact Report...

    Science.gov (United States)

    2012-08-03

    ... Department of the Army, Corps of Engineers Notice of Availability for the Draft Environmental Impact Statement/Environmental Impact Report (DEIS/DEIR) for Proposed Aggregate Terminal Project on Pier D in the... Environmental Quality Act (CEQA), the Port will serve as the Lead Agency for the preparation of an EIR for...

  1. 75 FR 50777 - Minidoka Dam Spillway Replacement, Minidoka County, ID

    Science.gov (United States)

    2010-08-17

    ... addition, the potential for ice damage to the stoplog piers requires that reservoir water levels be dropped... document those changes and/or impacts. DATES: Reclamation will not make a decision on the proposed action... headgates. If these failures occur, Reclamation may not be able to meet contractual obligations for...

  2. Nocturnal feeding under artificial light conditions by Brown-hooded Gull (Larus maculipennis) in Puerto Madryn harbour (Chubut Province, Argentina)

    NARCIS (Netherlands)

    Leopold, M.F.; Philippart, C.J.M.; Yorio, P.

    2010-01-01

    This paper describes nocturnal, marine feeding behaviour in the Brown-hooded Gull (Larus maculipennis) in November 2009. The gulls assembled at night at the end of a long pier, running 800 m offshore into the Golfo Nuevo, at Puerto Madryn, Chubut Province, Argentina. Powerful lights predictably ligh

  3. Supplemental Environmental Assessment for the Mid-Bay Bridge Connector Phases 2 and 3, Eglin Air Force Base, Florida

    Science.gov (United States)

    2010-08-03

    Places. 2. Educational materials, such as lesson plnn.s, developed for elementary school children in grades 4 tbrough 7 on site 80K900 and the...Impacts- Elizabeth Orr asked about these Rocky Creek: T resile or work bridge thru limits of wetlands limited number of temporary piers in stream

  4. 33 CFR 110.189a - Key West Harbor, Key West, Fla., naval explosives anchorage area.

    Science.gov (United States)

    2010-07-01

    ..., Key West, Fla., naval explosives anchorage area. (a) The anchorage ground. A circular area with its center at latitude 24°30′50.6″, longitude 81°50′31.6″ with a radius of 300 yards, for use for ammunition exceeding the prescribed limits for pier-side handling. (b) The regulations. (1) When occupied by a...

  5. MIT HJEM ER HVOR MIT HJERTE ER

    DEFF Research Database (Denmark)

    Høst, Jeppe Engset

    2014-01-01

    Ideen om at arbejde med det man kalder de stedbundne ressourcer på en ny måde, er relevant på Bornholm hvor events som blandt andet festivalen ’Wonderfestiwall’, strandfesten ’Vang Pier Beach Party’, karnevallet ’Svaneke Beach Party, kokkekonkurrencen ’Sol over Gudhjem’ og filmfestivalen ’Bornsho...

  6. Is Art Everywhere? : Barclay reklaamikampaania maskeerub kunstiks / Heie Treier

    Index Scriptorium Estoniae

    Treier, Heie, 1963-

    1998-01-01

    Reklaamimaailma ja kunsti suhted. Kunstisponsorlus kui varjatud sigaretireklaam. Barclay reklaamikampaania raames 25. juulil Pärnus toimunud kehamaalingute aktsioon. Kuraator Ene-Liis Semper, osalesid Marko Laimre, Kiwa, Jasper Zoova, Tarrvi Laamannn. 'Art is Everywhere' sündmuste generaator Eestis - Pier Li (rühmituse [21E67] liige)

  7. Inducing Corporate Proactive Compliance: liability controls & corporate monitors

    NARCIS (Netherlands)

    S. Oded (Sharon)

    2012-01-01

    textabstract“The steamship 'President Coolidge' arrived in the harbor of Honolulu August 26, 1937, and tied up at pier 8. At about the hour of 10 a.m. of that day, one Norman R. Arthur, a harbor patrol boatman under the United States District Engineer, was passing under the stern of the

  8. Tulev aasta toob kaheksanda "Baltoscandali" / M. T.

    Index Scriptorium Estoniae

    M. T.

    2005-01-01

    8.-9. dets. on Rakvere teatris Johan Simonsi lavastus "Hääled" mille autor on Pier Paolo Pasolini. Neljas rollis belgia-hollandi näitleja Jeroen Willems. Samadel päevadel on Rakveres 28.06.-2.07.2006 toimuva teatrifestivali tutvustus

  9. Kommunikatsioon ei ole vaid sõnum / Alfredo Jaar ; intervjueerinud Maria-Kristiina Soomre ja Reet Varblane

    Index Scriptorium Estoniae

    Jaar, Alfredo, 1956-

    2010-01-01

    Tšiili nüüdiskunstnik Alfredo Jaar, kes esitles 14. aprillil Kumu auditooriumis oma filmi itaalia filmirežissöörist ja kirjanikust Pier Paolo Pasolinist "Pasolini tuhk" (USA, 2009), endast, oma loomingust, eri arengutasemega maade kunstnike osalemisest biennaalidel, kunstniku sõltumatusest, praeguse kunsti ja publiku lõhest, kunstiteose kommunikatiivsusest, maailma muutmisest kunsti abil jm.

  10. Baltoscandal tuleb "Häältega" / Inna Grünfeldt

    Index Scriptorium Estoniae

    Grünfeldt, Inna, 1961-

    2005-01-01

    8.-9. dets. on Rakvere teatris Johan Simonsi lavastus "Hääled" mille autor on Itaalia režissöör ja kirjanik Pier Paolo Pasolini. Neljas rollis belgia-hollandi näitleja Jeroen Willems. Samadel päevadel oli Rakveres 28.06.-2.07.2006 toimuva teatrifestivali tutvustus

  11. Performance Evaluation of the Wavestar Prototype

    DEFF Research Database (Denmark)

    Kramer, Morten; Marquis, Laurent; Frigaard, Peter

    2011-01-01

    Wave Star has produced and installed a test and demonstration Wave Energy Converter (WEC) by Roshage pier near Hanstholm at the west coast of Denmark. The test unit is a prototype test section of a complete commercial WEC. After an initial period of finalizing the installation and testing, the WE...

  12. PSYCHOSOCIAL EFFECTS OF 2 YEARS OF HUMAN GROWTH-HORMONE TREATMENT IN TURNER SYNDROME

    NARCIS (Netherlands)

    SLIJPER, FME; SINNEMA, G; AKKERHUIS, GW; BRUGMANBOEZEMAN, A; FEENSTRA, J; DENHARTOG, L; HEUVEL, F

    1993-01-01

    Thirty-eight girls with Turner syndrome were treated for 2 years with human growth hormone. Both parents and patients carried out assessments of the effects of treatment on various aspects of psychosocial functioning. The children used the Piers-Harris Self-Concept Scale and the Social Anxiety Scale

  13. Assessing Plankton and Particles with an Autonomous Imaging LOPC

    Science.gov (United States)

    2008-01-01

    Artemia , provided by the Hubbs Research Institute, were introduced. Images of these zooplankton, acquired in April 2008 in the SIO pier flume, are shown...long), and an Artemia (~ 0.8 mm long).] 3 Laser Optical Plankton Counter The final operational software was

  14. 33 CFR 117.1035 - Columbia River.

    Science.gov (United States)

    2010-07-01

    ... on the channel piers start flashing, a downward pointing arrow consisting of amber colored lights is... red lights continue to flash and the downward pointing arrow is displayed, until the lift span returns... begins closing and the centerspan navigation lights turn from green to red. The horn sounds for...

  15. Climate as an indicator

    NARCIS (Netherlands)

    Wassink, J.

    2011-01-01

    They both have Delft roots, but their standpoints in the climate discussion are by no means similar: Professor Pier Vellinga worried publicly, whereas Professor Salle Kroonenberg qualified climate change. Strangely enough, they do agree on the solutions. “If you take a long, hard look,” Prof. Vellin

  16. Generation of Intense Low-Frequency Collimated Sound Beams by Nonlinear Acoustics and Detection by a Millimeter-Wave Vibrometer

    Science.gov (United States)

    2010-10-01

    millimeter wave interferometer for remote vibration sensing, M. Smith, J. Scales, M. Weiss, B. Zadler, in press, Journal of Applied Physics List of...PIERS). Enhancing the nonlinear conversion in ultrasonic parametric arrays, to be submitted to Journal of Applied Physics . (d) Manuscripts Number of

  17. Forms and terminology of Direct Democracy

    DEFF Research Database (Denmark)

    Svensson, Palle

    It is apparent that some confusion exits both among researchers and political actors about the various forms of direct democracy. Various institutions such as IRI and IDEA, various countries such as Switzerland and California, and various authors such as Pier Vincenzo Uleri and David Altman present...

  18. De Koraalriffen van Emmahaven (W. Sumatra)

    NARCIS (Netherlands)

    Umbgrove, J.H.F.

    1931-01-01

    In the bay of Emmahaven near Padang (W. Sumatra) is a small coral reef. On the North side of this reef a small, sandy island occurs called Pasir Ketjil. It has lately been surrounded by brick walls, besides which a stone pier has been built in a S.W. direction (cf. fig. 1, a map of 1899 and fig. 2 a

  19. Forms and terminology of Direct Democracy

    DEFF Research Database (Denmark)

    Svensson, Palle

    It is apparent that some confusion exits both among researchers and political actors about the various forms of direct democracy. Various institutions such as IRI and IDEA, various countries such as Switzerland and California, and various authors such as Pier Vincenzo Uleri and David Altman present...

  20. An Analysis of Coastal Zone Management Program Proposals to Determine their Effect on the United States Air Force.

    Science.gov (United States)

    1976-06-01

    with brief policy summaries. Areas covered are: Agricul- tural Practices, Archaeological Areas and Historic Sites, Aquaculture , Breakwaters...Bulkheads, Commercial Development, Dredging, Forest Management Practices, Jetties and Groins, Landfill, Marinas , Mining, Outdoor Advertising, Piers, Ports and...consistent with other CZMP policies. Accessibility to the coastal zone will be accomplished through a coastal trails system and expansion of marinas

  1. De Koraalriffen van Emmahaven (W. Sumatra)

    NARCIS (Netherlands)

    Umbgrove, J.H.F.

    1931-01-01

    In the bay of Emmahaven near Padang (W. Sumatra) is a small coral reef. On the North side of this reef a small, sandy island occurs called Pasir Ketjil. It has lately been surrounded by brick walls, besides which a stone pier has been built in a S.W. direction (cf. fig. 1, a map of 1899 and fig. 2 a

  2. 48 CFR 47.305-6 - Shipments to ports and air terminals.

    Science.gov (United States)

    2010-10-01

    ... transportation costs are concerned. (d) Unless logistics requirements limit the ports of loading to the ports...) When the delivery term is ex dock, pier, or warehouse, port of importation or c.& f. (cost & freight...) for the commodity. (4) When the delivery term is c.i.f. (cost, insurance, freight) destination, the...

  3. 75 FR 78228 - Takes of Marine Mammals Incidental to Specified Activities; Columbia River Crossing Project...

    Science.gov (United States)

    2010-12-15

    ... improved bicycle/pedestrian facilities, using a stacked alignment to reduce the number of in-water piers in... path. Each bridge will have four or five in-water bents, consisting of one to three drilled shafts. The... using drilled shafts, rather than impact-driven piles. However, the project will include...

  4. 77 FR 73311 - Special Local Regulation and Safety Zone; America's Cup Sailing Events, San Francisco, CA...

    Science.gov (United States)

    2012-12-10

    ... waters of San Francisco Bay adjacent to the City of San Francisco waterfront in the vicinity of the... access to pier space and facilities along the City of San Francisco waterfront and to minimize other...-September 23, 2013). An image illustrating the location of the transit zone is available in the docket....

  5. Heterogeneous port traffic of general ships and seaplanes and its simulation

    NARCIS (Netherlands)

    Zhou, Y.; Weng, J.; Daamen, W.; Hoogendoorn, S.P.; Vellinga, T.

    2014-01-01

    Along with the development of the civil seaplane industry in China and all around the world, the number of seaplane piers in port areas will increase. As a consequence, the port traffic will not only increase, it will also become more heterogeneous, consisting of ships and seaplanes. This paper pres

  6. PSYCHOSOCIAL EFFECTS OF 2 YEARS OF HUMAN GROWTH-HORMONE TREATMENT IN TURNER SYNDROME

    NARCIS (Netherlands)

    SLIJPER, FME; SINNEMA, G; AKKERHUIS, GW; BRUGMANBOEZEMAN, A; FEENSTRA, J; DENHARTOG, L; HEUVEL, F

    1993-01-01

    Thirty-eight girls with Turner syndrome were treated for 2 years with human growth hormone. Both parents and patients carried out assessments of the effects of treatment on various aspects of psychosocial functioning. The children used the Piers-Harris Self-Concept Scale and the Social Anxiety Scale

  7. Functional silicone elastomers via novel siloxane copolymers and chain extenders

    DEFF Research Database (Denmark)

    Madsen, Frederikke Bahrt; Daugaard, Anders Egede; Hvilsted, Søren

    of siloxane copolymers[1] (via the tris(pentafluorophenyl)borane catalysed Piers-Rubinsztajn reaction[2]), which allows for the attachment of functional molecules through copper-catalysed azide-alkyne 1,3-dipolar cycloaddition (CuAAC)[3]. The synthesised copolymers allow for a high degree of chemical freedom...

  8. Preliminary physics-engine model of dolosse interacting with one another

    CSIR Research Space (South Africa)

    Cooper, Antony K

    2008-03-01

    Full Text Available A variety of armour units are used to protect breakwaters, piers and other harbour infrastructure, serving both to absorb the impact of violent seas and to reduce overtopping. A common type of armour unit is the dolos. Coastal engineers use three...

  9. Minutes of the Explosives Safety Seminar (20th) Held at OMNI international Hotel, Norfolk, Virginia on 24-26 August 1982. Volume I

    Science.gov (United States)

    1982-08-01

    corresponding distance from the tension edge to the neutral axis is given as (2) IVF , +TF -P where the variables are as defined in Figure 4. The secentricity of...by compulsory purchase of the town to provide a buffer zone of 2 miles radius from the piers. 3. This solution might not have been aoopted if t0e

  10. 76 FR 59125 - Environmental Impacts Statements; Notice of Availability

    Science.gov (United States)

    2011-09-23

    ..., Don Edwards San Francisco Bay National Wildlife Refuge, Bair Island State Ecological Reserve, South... National Forest, Eastern Region, Cook County, MN, Review Period Ends: 10/24/2011, Contact: Peter Taylor 218-626-4368. EIS No. 20110316, Draft EIS, USACE, CA, Pier S Marine Terminal Development and Back...

  11. 78 FR 67300 - Anchorage Regulations: Pacific Ocean at San Nicolas Island, Calif.; Restricted Anchorage Areas

    Science.gov (United States)

    2013-11-12

    ..., go to http://www.regulations.gov , type the docket number USCG-2012-0967 in the ``SEARCH'' box and...'' box and click ``SEARCH.'' Click on Open Docket Folder on the line associated with this rulemaking. You... Beach and the explosives safety arc around the Barge Pier at Daytona Beach (see figure 2 located in...

  12. 78 FR 29022 - Safety Zone; Fourth of July Fireworks, Berkeley Marina, Berkeley, CA

    Science.gov (United States)

    2013-05-17

    ... SECURITY Coast Guard 33 CFR Part 165 Safety Zone; Fourth of July Fireworks, Berkeley Marina, Berkeley, CA... enforce the safety zone for the Berkeley Marina Fourth of July Fireworks display in the Captain of the... Berkeley Pier in approximate position 37 51'40'' N, 122 19'19'' W (NAD 83) from 9:30 p.m. until 10:15...

  13. Tradesmen, Traitors, Pirates, and Prostitutes: Depictions of the Flemish in Later Medieval England

    Science.gov (United States)

    Schwamb, Sara M. B.

    2010-01-01

    This study examines the depictions of the Flemish in Chaucer's "The Canterbury Tales", Langland's "Piers Plowman", several historical chronicles including The Brut continuations, poetic works such as "The Libelle of Englysh Polycye", additional short poems dealing directly with events of the Hundred Years' War, and…

  14. Stockholmi Moodsa Kunsti Muuseumi uus elu / Reet Varblane

    Index Scriptorium Estoniae

    Varblane, Reet, 1952-

    1998-01-01

    Stockholmi Moodsa Kunsti Muuseumist, mille Stockholmi südalinnas Skeppsholmeni saarel asuvas uues, spetsiaalselt kaasaegse kunsti näitamiseks ja hoidmiseks projekteeritud hoones (arhitekt Rafael Moneo) avati 14. veebr. kunsti-, foto- ja arhitektuurimuuseum. Muuseumi ajaloost, eesmärkidest. Moderna Museet'i direktori David Eliott'i esimesest kuraatoritööst (koos Pier Luigi Tazziga) "Haavad".

  15. Near-fault directivity pulse-like ground motion effect on high-speed railway bridge

    Institute of Scientific and Technical Information of China (English)

    陈令坤; 张楠; 蒋丽忠; 曾志平; 陈格威; 国巍

    2014-01-01

    The vehicle-track-bridge (VTB) element was used to investigate how a high-speed railway bridge reacted when it was subjected to near-fault directivity pulse-like ground motions. Based on the PEER NAG Strong Ground Motion Database, the spatial analysis model of a vehicle-bridge system was developed, the VTB element was derived to simulate the interaction of train and bridge, and the elasto-plastic seismic responses of the bridge were calculated. The calculation results show that girder and pier top displacement, and bending moment of the pier base increase subjected to near-fault directivity pulse-like ground motion compared to far-field earthquakes, and the greater deformation responses in near-fault shaking are associated with fewer reversed cycles of loading. The hysteretic characteristics of the pier subjected to a near-fault directivity pulse-like earthquake should be explicitly expressed as the bending moment-rotation relationship of the pier base, which is characterized by the centrally strengthened hysteretic cycles at some point of the loading time-history curve. The results show that there is an amplification of the vertical deflection in the girder’s mid-span owing to the high vertical ground motion. In light of these findings, the effect of the vertical ground motion should be used to adjust the unconservative amplification constant 2/3 of the vertical-to-horizontal peak ground motion ratio in the seismic design of bridge.

  16. 33 CFR 207.441 - St. Marys Falls Canal and Locks, Mich.; security.

    Science.gov (United States)

    2010-07-01

    ... channel within the limits of the lock piers either above or below the lock, in the direction of the tank.... Tank vessels to which this paragraph (b)(4)(ii) applies include those vessels carrying fuel oil... gate to the vessel. Luggage will be subject to inspection. (ii) Debarking. The vessel master...

  17. Perfectionism and Children's Self-Concept: Further Validation of the Adaptive/Maladaptive Perfectionism Scale

    Science.gov (United States)

    Rice, Kenneth G.; Kubal, Anne E.; Preusser, Karen J.

    2004-01-01

    The Adaptive/Maladaptive Perfectionism Scale (AMPS) for children measures different dimensions of perfectionism. In this study, subscales derived from the AMPS were compared with results of the Piers-Harris Self-Concept Scale (PHSCS) in a sample of fourth- and fifth-grade students (9 to 11 years old). The AMPS dimensions accounted for significant…

  18. Loglines. November-December 2014

    Science.gov (United States)

    2014-12-01

    of food for dining facilities in Afghanistan. DLA Disposition Services employees in Europe also help sell copper scrap that’s collected in...Petty Officer 2nd Class Charles Poplin (left) and Petty Officer 1st Class Robert Young construct pillars as part of a pier project in Romania. DLA has

  19. Corrosion monitoring for underground and submerged concrete structures - examples and interpretation issues

    NARCIS (Netherlands)

    Polder, R.B.; Peelen, W.H.A.; Leegwater, G.

    2008-01-01

    Since about 1980 Corrosion Monitoring Systems have been used in many concrete structures in aggressive environmentworldwide. While these systemswork properly in aboveground environment, some questions have arisen for submerged conditions, e.g. the outer sides of tunnels, piers in seawater or foundat

  20. 33 CFR 165.1110 - Security Zone: Coronado Bay Bridge, San Diego, CA.

    Science.gov (United States)

    2010-07-01

    ... Bridge, San Diego, CA. 165.1110 Section 165.1110 Navigation and Navigable Waters COAST GUARD, DEPARTMENT... § 165.1110 Security Zone: Coronado Bay Bridge, San Diego, CA. (a) Location. All navigable waters of San Diego Bay, from the surface to the sea floor, within 25 yards of all piers, abutments, fenders and...

  1. 33 CFR 207.160 - All waterways tributary to the Atlantic Ocean south of Chesapeake Bay and all waterways tributary...

    Science.gov (United States)

    2010-07-01

    ..., bridges, piers, fences, trees, houses, shops or any other property of the United States pertaining to the..., house boats or like craft shall be expedited by locking them through with commercial craft (other than... by written permit from the District Engineer. (8) The building, assembling, or breaking up of a...

  2. Engineering With Nature Geographic Project Mapping Tool (EWN ProMap)

    Science.gov (United States)

    2015-07-01

    particularly for reef module breakwaters in the Caribbean and Central America regions. At the time this document was written, only five projects...habitat Jetty Island restoration Multiple round point Mammal habitat Navigation dredging Recreation Other in-water construction Reptile habitat Pier

  3. 76 FR 30584 - Safety Zones; Eleventh Coast Guard District Annual Fireworks Events

    Science.gov (United States)

    2011-05-26

    ... National Technology Transfer and Advancement Act (NTTAA) (15 U.S.C. 272 note) directs agencies to use... fireworks display. 28. San Francisco New Years Eve Fireworks Display Sponsor City of San Francisco. Event Description Fireworks Display. Date New Years Eve, December 31st. Location 1,000 feet off Pier 2,...

  4. 76 FR 7131 - Safety Zones; Eleventh Coast Guard District Annual Fireworks Events

    Science.gov (United States)

    2011-02-09

    ... National Technology Transfer and Advancement Act (NTTAA) (15 U.S.C. 272 note) directs agencies to use... fireworks display. 28. San Francisco New Years Eve Fireworks Display Sponsor City of San Francisco. Event Description Fireworks Display. Date New Years Eve, December 31st. Location 1,000 feet off Pier 2,...

  5. 76 FR 50669 - Safety Zones; Eleventh Coast Guard District Annual Fireworks Events

    Science.gov (United States)

    2011-08-16

    ... under Executive Order 13211. Technical Standards The National Technology Transfer and Advancement Act... fireworks display. 28. San Francisco New Years Eve Fireworks Display Sponsor City of San Francisco. Event Description Fireworks Display. Date New Years Eve, December 31st. Location 1,000 feet off Pier 2,...

  6. 48 CFR 252.217-7005 - Inspection and manner of doing work.

    Science.gov (United States)

    2010-10-01

    ... vessel at all times while the vessel is berthed alongside the Contractor's pier or in dry dock or on a..., when the vessel is in the custody of the Contractor or in dry dock or on a marine railway and the...

  7. 48 CFR 3052.217-91 - Performance (USCG).

    Science.gov (United States)

    2010-10-01

    ... personnel of the vessel while in dry dock or on a marine railway, sanitary lavatory and similar facilities... gangways from the pier, dry dock, or marine railway to the vessel; (3) Treat salvage, scrap or other ship's... near the site of the work for the Government's use. (d) The contract will state whether dock and sea...

  8. Corrosion monitoring for underground and submerged concrete structures - examples and interpretation issues

    NARCIS (Netherlands)

    Polder, R.B.; Peelen, W.H.A.; Leegwater, G.

    2008-01-01

    Since about 1980 Corrosion Monitoring Systems have been used in many concrete structures in aggressive environmentworldwide. While these systemswork properly in aboveground environment, some questions have arisen for submerged conditions, e.g. the outer sides of tunnels, piers in seawater or

  9. Bathymetric surveys at highway bridges crossing the Missouri River in Kansas City, Missouri, using a multibeam echo sounder, 2010

    Science.gov (United States)

    Huizinga, Richard J.

    2010-01-01

    Bathymetric surveys were conducted by the U.S. Geological Survey, in cooperation with the Missouri Department of Transportation, on the Missouri River in the vicinity of nine bridges at seven highway crossings in Kansas City, Missouri, in March 2010. A multibeam echo sounder mapping system was used to obtain channel-bed elevations for river reaches that ranged from 1,640 to 1,800 feet long and extending from bank to bank in the main channel of the Missouri River. These bathymetric scans will be used by the Missouri Department of Transportation to assess the condition of the bridges for stability and integrity with respect to bridge scour. Bathymetric data were collected around every pier that was in water, except those at the edge of the water or in extremely shallow water, and one pier that was surrounded by a large debris raft. A scour hole was present at every pier for which bathymetric data could be obtained. The scour hole at a given pier varied in depth relative to the upstream channel bed, depending on the presence and proximity of other piers or structures upstream from the pier in question. The surveyed channel bed at the bottom of the scour hole was between 5 and 50 feet above bedrock. At bridges with drilled shaft foundations, generally there was exposure of the upstream end of the seal course and the seal course often was undermined to some extent. At one site, the minimum elevation of the scour hole at the main channel pier was about 10 feet below the bottom of the seal course, and the sides of the drilled shafts were evident in a point cloud visualization of the data at that pier. However, drilled shafts generally penetrated 20 feet into bedrock. Undermining of the seal course was evident as a sonic 'shadow' in the point cloud visualization of several of the piers. Large dune features were present in the channel at nearly all of the surveyed sites, as were numerous smaller dunes and many ripples. Several of the sites are on or near bends in the river

  10. A “linguagem do futebol” segundo Pasolini: “futebol de prosa” e “futebol de poesia”

    Directory of Open Access Journals (Sweden)

    Élcio Loureiro Cornelsen

    2011-10-01

    Full Text Available Resumo: Nosso artigo apresenta uma reflexão sobre a tentativa do cineasta e escritor italiano Pier Paolo Pasolini (1922-1975 em elaborar uma “semiologia do futebol”. No ensaio “Il calcio ‘è’ un linguaggio con i suoi poeti e prosatori” (1971, Pasolini estabelece, em tom de “diversão”, as categorias  “futebol de prosa” e “futebol de poesia” para diferenciar esteticamente o futebol europeu do latin-americano. Nesse sentido, nos valeremos de tais categorias para avaliar “semiologicamente” – no sentido pasoliniano – o estado atual do futebol em relação àquele de 1970, quando a Seleção Canarinho se sagrou tricampeã mundial diante da Squadra Azzurra.Palavras-chave: Pier Paolo Pasolini; semiologia; futebol; prosa; poesia.Abstract: Questo articolo riflette sull’esperimento dell’elaborazione di una “semiologia del calcio” proposta dal cineasta e scrittore Pier Paolo Pasolini (1922-1975. Nel saggio del 1971, intitolato “Il calcio ‘è’ un linguaggio con i suoi poeti e prosatori”, Pasolini crea per svago le categorie “calcio di prosa” e “calcio di poesia”, vuole distinguere esteticamente il calcio europeo da quello latino americano. Ci si avvale di predette categorie per valorare “semiologicamente” – in senso pasoliniano – lo stato attuale in rapporto a quello del 1970, anno in cui la Selezione Brasiliana ha ottenuto il titolo di tricampione mondiale vicendo la Squadra Azzurra.Parole chiave: Pier Paolo Pasolini; semiologia; calcio; prosa; poesia.Keywords: Pier Paolo Pasolini; semiology; soccer; prose; poetry.

  11. Potential-scour assessments and estimates of scour depth using different techniques at selected bridge sites in Missouri

    Science.gov (United States)

    Huizinga, Richard J.; Rydlund, Jr., Paul H.

    2004-01-01

    The evaluation of scour at bridges throughout the state of Missouri has been ongoing since 1991 in a cooperative effort by the U.S. Geological Survey and Missouri Department of Transportation. A variety of assessment methods have been used to identify bridges susceptible to scour and to estimate scour depths. A potential-scour assessment (Level 1) was used at 3,082 bridges to identify bridges that might be susceptible to scour. A rapid estimation method (Level 1+) was used to estimate contraction, pier, and abutment scour depths at 1,396 bridge sites to identify bridges that might be scour critical. A detailed hydraulic assessment (Level 2) was used to compute contraction, pier, and abutment scour depths at 398 bridges to determine which bridges are scour critical and would require further monitoring or application of scour countermeasures. The rapid estimation method (Level 1+) was designed to be a conservative estimator of scour depths compared to depths computed by a detailed hydraulic assessment (Level 2). Detailed hydraulic assessments were performed at 316 bridges that also had received a rapid estimation assessment, providing a broad data base to compare the two scour assessment methods. The scour depths computed by each of the two methods were compared for bridges that had similar discharges. For Missouri, the rapid estimation method (Level 1+) did not provide a reasonable conservative estimate of the detailed hydraulic assessment (Level 2) scour depths for contraction scour, but the discrepancy was the result of using different values for variables that were common to both of the assessment methods. The rapid estimation method (Level 1+) was a reasonable conservative estimator of the detailed hydraulic assessment (Level 2) scour depths for pier scour if the pier width is used for piers without footing exposure and the footing width is used for piers with footing exposure. Detailed hydraulic assessment (Level 2) scour depths were conservatively estimated by

  12. Design of Danyang Road Bridge in Heze City%菏泽市丹阳路大桥设计

    Institute of Scientific and Technical Information of China (English)

    张伟

    2015-01-01

    菏泽市丹阳路大桥为(40+100+240+100+40) m 双塔中央单索面半飘浮体系混凝土斜拉桥。该桥塔、墩固结,主梁与塔、墩间设置横、竖向支座和纵向液压阻尼器;主梁采用单箱三室斜腹板截面,高3.6m。桥塔采用顺桥向人字形的独柱混凝土塔,高68.2m,单箱单室矩形空心截面。人字形塔柱穿过主梁,与墩身顺接,墩身采用十字形空心薄壁截面,矩形承台,布置33根φ2.0m钻孔灌注桩。辅助墩和交接墩均采用花瓶形双柱式框架墩,矩形承台,布置8根φ1.5m钻孔灌注桩。斜拉索采用φ7 mm镀锌高强平行钢丝束。采用MIDAS Civil 2006和SCDS平面程序对该桥进行计算分析,结果表明该桥各项检算均满足规范要求。%T he Danyang Road Bridge in Heze City is a semi‐floating system concrete cable‐stayed bridge with double pylons ,a central single cable plane and with span arrangement (40+100+240+100+40) m .T he pylons and piers of the bridge are rigidly fixed and in betw een the main girder and pylons and piers ,the lateral and vertical bearings and the longitudinal hydraulic damp‐ers are arranged .The cross section of the main girder is the section of triple‐cell single box with in‐clined webs and the girder is 3 .6 m in depth .In the longitudinal direction of the bridge ,a pylon is the single‐column concrete pylon in the shape of inverted Y ,is 68 .2 m in height and the cross sec‐tion of the pylon is the rectangular hollow section of single‐cell single box .The inverted Y‐shape pylon passes through the main girder and is smoothly fixed with the pylon pier .The cross section of the pylon pier is the crisscross hollow thin‐wall section and the pier stands on the rectangular pile cap under w hich 33 nos .of φ2 .0 m bored piles are arranged .T he auxiliary piers and boundary piers are all the vase‐shape double‐column frame piers and respectively stand on each rectangular

  13. Construction and validation of a scale selfconcept for mozambican adolescents

    OpenAIRE

    Campira, Farissai P.; Araújo, Alexandra Maria Dantas de Castro; Leandro S. Almeida

    2013-01-01

    Apresenta-se um estudo da adaptação e validação da escala de autoconceito de Piers-Harris (Piers-Harris Children’s Self Concept Scale; PHCSCS-2) para o contexto moçambicano, que conduziu à construção de uma nova escala para a avaliação deste constructo neste contexto cultural. A adaptação deste instrumento à população de adolescentes moçambicanos em contexto de educação formal conduziu a profundas modificações no instrumento original, quer no número e formulação dos itens, quer no formato da ...

  14. RESEM-CA Final Project Report

    Energy Technology Data Exchange (ETDEWEB)

    Carroll, William

    2004-06-01

    This document is the final deliverable for Project 2.2-Retrofit Tools, in the California Energy Commission Public Interest Energy Research Program for High Performance Commercial Building Systems (PIER-HPCBS). The objective of Project 2.2 is to deliver an updated and California-Customized retrofit analysis tool based on the earlier federally funded RESEM (Retrofit Energy Savings Estimation Method) tool [1]. Specific tasks to accomplish this were identified in PIER HPCBS Report No. E2P2.2T1c, and addressed (a) modernization, (b) enhancement of basic analysis methods and capabilities, (c) adding, modifying, or updating databases for California building types, systems, components, utility rate structures, and weather.

  15. Passive Vibration Control of Existing Structures by Gravity-Loaded Cables

    Science.gov (United States)

    Alvis, E.; Tsang, H. H.; Hashemi, M. J.

    2017-06-01

    Structures with high concentration of mass at or close to the top such as highway bridge piers are vulnerable in earthquakes or accidents. In this paper, a simple and convenient retrofit strategy is proposed for minimizing vibrations and damages, extending service life and preventing collapse of existing structures. The proposed system comprises of tension-only cables secured to the sides of the structure through gravity anchor blocks that are free to move in vertical shafts. The system is installed in such a way that the cables do not induce unnecessary stress on the main structure when there is no lateral motion or vibration. The effectiveness of controlling global structural responses is investigated for tension-only bilinear-elastic behaviour of cables. Results of a realistic case study for a reinforced concrete bridge pier show that response reduction is remarkably well under seismic excitation.

  16. Direct Creation of Construction Drawings for Kwanyin Statue by CloseRange Photogrammetry

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    In order to provide the model point accuracy of ±2 mm,an extra high accuracy industrial control net with four surveying piers with accuracy ±0.1 mm was set up around the model.Tens of orientation marks have been placed on the different parts and measured with accuracy ±0.2 mm from the abovementioned piers.The main four stereopairs taken with the P31 camera around the model are simultaneously processed on the BC2 analytical plotter.The accuracy of absolute orientation is better than ±0.9 mm.Finally,about 300 sections construction drawings have been directly offered,and the closerange photogrammetric data has been used for the design and construction of the statue.

  17. Topographic effects on seismic response of long-span rigid-frame bridge under SV seismic wave

    Institute of Scientific and Technical Information of China (English)

    WANG Lei; ZHAO Cheng-gang; QU Tie-jun

    2008-01-01

    Seismic ground motions of two neighboring mountains and the free surface between them are calculated under the SV seismic waves with three different incident angles. The results are then taken as the inputs of multi-point seismic excitations for the foundation of a long-span bridge built over the valley in the analysis considering the inte-grated influence of traveling wave and topography. On the basis of a dynamic analytical method, a finite element model is created for the seismic responses of a four-span rigid-frame bridge of 440 m. The pier-top displacement and the pier-bottom internal force of the bridge are calculated. Then the results are compared with those considering traveling-wave effect only. The conclusions can serve as a seismic design reference for the structures located on the complex mountain topography.

  18. Mathematical modelling of scour: A review

    DEFF Research Database (Denmark)

    Sumer, B. Mutlu

    2007-01-01

    A review is presented of mathematical modelling of scour around hydraulic and marine structures. Principal ideas, general features and procedures are given. The paper is organized in three sections: the first two sections deal with the mathematical modelling of scour around piers/piles and pipeli......A review is presented of mathematical modelling of scour around hydraulic and marine structures. Principal ideas, general features and procedures are given. The paper is organized in three sections: the first two sections deal with the mathematical modelling of scour around piers....../piles and pipelines, respectively, the two benchmark cases, while the third section deals with the mathematical modelling of scour around other structures such as groins, breakwaters and sea walls. A section is also added to discuss potential future research areas. Over one hundred references are included...

  19. Topographic effects on seismic response of long-span rigid-frame bridge under SV seismic wave

    Science.gov (United States)

    Wang, Lei; Zhao, Cheng-Gang; Qu, Tie-Jun

    2008-05-01

    Seismic ground motions of two neighboring mountains and the free surface between them are calculated under the SV seismic waves with three different incident angles. The results are then taken as the inputs of multi-point seismic excitations for the foundation of a long-span bridge built over the valley in the analysis considering the integrated influence of traveling wave and topography. On the basis of a dynamic analytical method, a finite element model is created for the seismic responses of a four-span rigid-frame bridge of 440 m. The pier-top displacement and the pier-bottom internal force of the bridge are calculated. Then the results are compared with those considering traveling-wave effect only. The conclusions can serve as a seismic design reference for the structures located on the complex mountain topography.

  20. Quantitative x-ray diffraction mineralogy of Los Angeles basin core samples

    Science.gov (United States)

    Hein, James R.; McIntyre, Brandie R.; Edwards, Brian D.; Lakota, Orion I.

    2006-01-01

    This report contains X-ray diffraction (XRD) analysis of mineralogy for 81 sediment samples from cores taken from three drill holes in the Los Angeles Basin in 2000-2001. We analyzed 26 samples from Pier F core, 29 from Pier C core, and 26 from the Webster core. These three sites provide an offshore-onshore record across the Southern California coastal zone. This report is designed to be a data repository; these data will be used in further studies, including geochemical modeling as part of the CABRILLO project. Summary tables quantify the major mineral groups, whereas detailed mineralogy is presented in three appendices. The rationale, methodology, and techniques are described in the following paper.

  1. From the Tevatron to Project X

    CERN Document Server

    Pier Oddone, Fermilab director (from CERN Courier)

    2011-01-01

    In the October issue of the CERN Courier, Fermilab Director Pier Oddone will present the past, present and future of the US laboratory after the Tevatron. The Bulletin presents some early extracts from his article…   Fermilab Director, Pier Oddone. The end of September marks the end of an era at Fermilab, with the shutdown of the Tevatron after 28 years of operation at the frontiers of particle physics. The Tevatron’s far-reaching legacy spans particle physics, accelerator science and industry. The collider established Fermilab as a world leader in particle physics research, a role that will be strengthened with a new set of facilities, programmes and projects in neutrino and rare-process physics, astroparticle physics, and accelerator and detector technologies. The Tevatron exceeded every expectation ever set for it. This remarkable machine achieved luminosities with antiprotons once considered impossible, reaching more than 4x1032 cm-2s-1 instantaneous luminosity and...

  2. Structural safety monitoring for Nanjing Yangtze River Bridge

    Institute of Scientific and Technical Information of China (English)

    黄方林; 何旭辉; 陈政清; 曾储惠

    2004-01-01

    In order to evaluate objectively and accurately the integrity, safety and operating conditions in real time for the Nanjing Yangtze River Bridge, a large structural safety monitoring system was described. The monitoring system is composed of three parts: sensor system, signal sampling and processing system, and safety monitoring and assessment system. Combining theoretical analysis with measured data analysis, main monitoring contents and layout of measuring points were determined. The vibration response monitoring was significantly investigated. The main contents of safety monitoring on vibration response monitoring are vibration of the main body of the Nanjing Yangtze river bridge, collision avoidance of the bridge piers, vibration of girders on high piers for the bridge approach and earthquake. As a field laboratory, the safety monitorying system also provides information to investigate the unknown and indeterminate problems on bridge structures and specific environment around bridges.

  3. Dedication of Fermilab's LHC Remote Operations Center

    CERN Multimedia

    Claudia Marcelloni

    2007-01-01

    Fermilab's Remote Operations Center will be dedicated simultaneously at Fermilab in the U.S. and from CMS (Point 5) in Cessy, France. Speakers will include: from the U.S. DOE Undersecretary for Science Raymond Orbach and Fermilab Director Pier Oddone (U.S.); and from CERN Director General Robert Aymar, CMS Spokesperson Jim Virdee, LHC Project Leader Lyn Evans and US CMS Project Manager Joel Butler.

  4. Having fun at THE Port Hackathon@CERN: Sophy team

    CERN Document Server

    CERN. Geneva

    2017-01-01

    THE Port problem-solving workshop - also known as a hackathon / makeathon - took place at CERN during the weekend of 14th-15th October. This year I had the opportunity to participate as member of the Pier58, more popularly known as Sophy team. What humanitarian problem did hack? Did we manage to carry out the project? And the most important what were our impressions about The Port experience?

  5. Erie Harbor, Pennsylvania, Channel Shoaling Analysis

    Science.gov (United States)

    2011-07-01

    Engineering Section Chief was Shanon Chader. COL Kevin J. Wilson, EN, was ERDC Commander and Executive Director and Dr. Jeffery P. Holland was...Repairs to the breach in the neck of the peninsula were in progress through the construction of a bulkhead of piles and heavy plank about 6 ft high, rip...were rip-rapped with stone. The piers were covered with flagging stone where the plank had decayed. The breach at the neck of the peninsula, at the

  6. Mississippi and Louisiana Estuarine Areas. Freshwater Diversion to Lake Pontchartrain Basin and Mississippi Sound. Feasibility Study. Volume 3. Technical Appendixes, E, F, G, H, I, J, K.

    Science.gov (United States)

    1984-04-01

    Acres, Seashore Recreation, Camping, Fishing. Parish Areas Williams Boat Launch P Fishing Pier, Courtesy Docks, Gazebo and Overlook. Bonnabel Boat...Record I1/9P-4/R3 3/7P-4/83 Sal inity, ppt Number of ( obst -rvat ions 49 Mean - 0.8 Pa npe - 0.1-3.5 Period of Pecord - 3/7P-4/P3 T~t.l[ ’, -fil tor ,li

  7. Overwash Processes and Foredune Ecology, Nauset Spit, Massachusetts.

    Science.gov (United States)

    1984-12-01

    played a major role in the infilling of Laguna Madre behind Padre Island, Texas . Washover deposits were subsequently reworked by the wind, which...stabilization experiments have been undertaken along the U.S. barrier coastline from Massachusetts to Texas (Savage, 1963; Gage, 1970; Dahl, et al., 1975...embayment in the mainland at the Chatham Fish Pier (Fig. $ 90). In this region the barrier widened to as much as 800 meters. In 1938 New North Beach was 4.1

  8. Coastal Inlets of Texas, USA

    Science.gov (United States)

    2007-01-01

    Caney Creek Freeport Ship Channel San Luis Pass Galveston Pass Rollover Fish Pass Sabine Pass Texas Victoria Houston Port Arthur Corpus Christi...1960) provide design guidance for constructing fish passes along the Texas coast, it appears that an update based on more recent experiences and...Hall Pier at Corpus Christi; and bay gauges (Rawlings at Mouth of Colorado River; Lavaca, and Port Isabel in the lower Laguna Madre ) for year 1999

  9. Seasonal Change in Nearshore and Channel Morphology at Packery Channel, A New Inlet Serving Corpus Christi, Texas

    Science.gov (United States)

    2011-01-01

    Channel enjoy a variety of activities including fishing, boating, swimming, snorkeling, and kayaking . Consistently strong wind and a weaker longshore...south of Bob Hall Pier. Fish Pass is an artificial inlet that opened in 1978 and began closing naturally soon after construction with complete closure...the Corpus Christi Water Exchange Pass. Rapid natural closure of the Fish Pass created doubt about the stability of the planned inlet at Packery

  10. Hybrid Airships in Joint Logistics Over the Shore (JLOTS)

    Science.gov (United States)

    2013-06-13

    were created as artificial harbors with breakwaters and piers to offload ships off the Normandy beaches because the Allies had not captured a French...anchorages for the vessel being discharged. Deceptively open areas of sea may constrain lighterage to subsurface paths directed by hidden sandbars, reefs , and...but allowed the tail to sway freely in the wind to prevent damage in higher winds that would damage the dirigible if hit broadside. Hybrid Airships

  11. In Situ Repair of Deteriorated Concrete in Hydraulic Structures: Feasibility Study

    Science.gov (United States)

    1987-05-01

    wider. Since formwork is not required, drypack is especially appropriate for use in vertical members. It is not appropriate for the repair of...improve the abrasion resistance of the concrete in outlet tunnel walls of dams. The impregnation process consists of four basic steps: a...to repair piles, footings, piers, retaining walls, abutments, base plates, tunnels , and dams. Preplaced-aggregate concrete provides low shrinkage

  12. Infrasound Assessment of Infrastructure Report 6: Scour Detection and Riverine Health Assessment Using Infrasound

    Science.gov (United States)

    2016-05-01

    to correspond to the vertical deformation of the pier, likely as a result of the slight cohesion of the silt, while the modal frequencies...conditions, and horizontal movement being the dominant motion corresponding to the lower modal frequencies. The significant difference between the ERDC... corresponds to the bridges crossing the Mississippi River in Vicksburg, MS. The two yellow arrows indicate the previously unrecorded signal. The top yellow

  13. Design and reactions of a carbon Lewis base/boron Lewis acid frustrated Lewis pair.

    Science.gov (United States)

    Möricke, Jennifer; Wibbeling, Birgit; Daniliuc, Constantin G; Kehr, Gerald; Erker, Gerhard

    2017-08-28

    The conjugated dienamine 4 selectively adds Piers' borane [HB(C6F5)2] to give the enamine/borane system 5, which features a boratirane structure by internal enamine carbon Lewis base to boron Lewis acid interaction. Compound 5 behaves as a C/B frustrated Lewis pair and undergoes typical addition reactions to benzaldehyde, several nitriles and to sulfur dioxide.This article is part of the themed issue 'Frustrated Lewis pair chemistry'. © 2017 The Author(s).

  14. Department of Defense Materiel Distribution System Study. Volume 3, Book 5. Appendix D-3. Depot Cost and Capacity

    Science.gov (United States)

    1978-07-01

    placed on labor. This premium is caused by the need to wear special cloth- ing, more inefficient working in cold spaces, and the need for extra...built-up asphalt and felt p*i>er with aggregate covering.- In addition to normal loadings, 100,000 square feet of the framing shall be stressed to...days per year. Conversion of shipments from annual to daily volumes involved a different routine. The annual shipment data received from the Stud

  15. On Closing the Implementation Gap: Symposium Proceedings

    Science.gov (United States)

    1983-09-01

    systems, or only certain aspects of the innova - tion fit into the organizational framework. Innovations are often designed so that this fragmentation...specific plans for routinizing the innova - tion’s use. Change agents can make an analysis of resisting factors ani pier- Fns and identify the most likely...risk bearing and career expectations, resource allocation, and training. Just as various aspects of an organization can be affected by an innova - tion

  16. Stochastic Analysis of the Multi-dimensional Effect of Chloride Ingress into Reinforced Concrete

    DEFF Research Database (Denmark)

    Frier, Christian; Sørensen, John Dalsgaard

    2007-01-01

    is the subject of the present paper. Typically, the chloride concentration is obtained by solving Fick's diffusion partial differential equation assuming chloride flow into an infinite half space. However, when the concrete structure is relatively thin or when a rebar is situated at a corner of the structure...... Optimum Linear Estimation) approach. A bridge pier in a marine environment is considered to exemplify the results....

  17. Seismic Behavior of concrete filled steel Tubular Built-up columns

    OpenAIRE

    Huang, Yufan

    2015-01-01

    With the advantages of CFST built-up columns, including the higher confinement in the concrete, delay of the steel local buckling, higher compressive and flexural strength, earthquake and fire resistance, rapid construction, savings in the construction costs, etc. CFST built-up columns are increasing adopted in structural members with larger load eccentricity ratio and slenderness ratio, such as stadium, industrial buildings, bridge pier and pillar, and electrical transmission tower. However,...

  18. Two-Way Tether Gun

    Science.gov (United States)

    Sanger, George F.

    1994-01-01

    Safety-tether device enables crewmembers on spacecraft to retrieve crewmember drifting away from spacecraft. Alternatively, drifting crewmember who carries device uses it to grasp and return to spacecraft. Also used on Earth. For example, rescuer on vessel or pier uses it to retrieve and haul drowning or unconscious person to safety; drifting person or rescuer in water uses it to grasp and hold onto support.

  19. Behaviour of composite sandwich decks at high temperatures

    OpenAIRE

    Puchades, Maria Isabel Garcia

    2016-01-01

    Structures made of FRP composites have been shown to provide efficient and economical applications in bridges and piers. They are being increasingly used due to their several advantages when compared to traditional materials, namely, the lightness, strength, good insulation properties, low maintenance and improved performance when submitted to aggressive environments. However, fire behaviour has been recently identified by several authors as the most critical gap for these materials to be ful...

  20. Study on the shock absorbing technique of high speed railway bridges

    Institute of Scientific and Technical Information of China (English)

    Li Chenggen; Gao Ri

    2011-01-01

    Based on the idea of "bearing function separation", a structural member called shock absorber that makes use of its plastic deformation is presented for reducing the seismic response of the bridge. The design criterion for matching material stress, strain and earthquake fortification aim, is also given. The analysis results show that the high speed railway box girder with the absorber in this paper has great reduction effect in seismic response of the bridge piers.

  1. 78 FR 53671 - Regulated Navigation Areas, Security Zones: Dignitary Arrival/Departure and United Nations...

    Science.gov (United States)

    2013-08-30

    ..., Brooklyn; and south of a line drawn between 40 42 14.8 N, 074 00 20.3 W (Wall Street, Manhattan), and the northwest corner of Pier 2 North, Brooklyn (NAD 1983). (2) Randalls and Wards Islands RNA: All waters of the East River between the Hell Gate Rail Road Bridge (mile 8.2), and a line drawn from a point at...

  2. U.S. Naval Observatory Annual Report 2001-2002

    Science.gov (United States)

    2002-06-01

    Miknaitis, G., Munn, J. A., Nichol, R., Oka- mura, S., Pier, J. A., Prada , F., Richards, G. T., Szalay, A., and York, D. G. ~2001!. ‘‘A Survey of z...Implications for Dark Bursts,’’ Astron. Astrophys. 369, 373. Garcia -Melendo, E., Henden, A. A., and Gomez-Forrelad, J. M. ~2001!. ‘‘GSC 5002-0629: A

  3. Great Lakes Oil-In-Ice Demonstration 3

    Science.gov (United States)

    2013-10-01

    Guard, in collaboration with other Federal, state, and local agencies, private industry , and international interested parties, to gain practical...instrumented ROV were selected for demonstration. The Salvation Army was contacted and graciously provided a pier-side warming shelter, hot drinks, snacks ...structure became unstable due to high winds and snow loading. Subsequently, they were able to set up a warming station with warm beverages, snacks

  4. Bibliography of Publications of the Coastal Engineering Research Center and the Beach Erosion Board,

    Science.gov (United States)

    1981-12-01

    34 Apr. 1976. Keywords: Duck, North Carolina, Dunes, Field Research FaciZity-CERC, Floristics, Phytosociology , Plant ecology, Vegetation A vegetative...PHOTOGRAPHY OF LITTORAL PHENOMENA (JUL 1973) PHYTOSOCIOLOGY MR 76-6 <VEGETATIVE STUDY AT THE DUCK FIELD RESEARCH FACILITY, DUCK, NORTH CAROLINA (APR 1976...MODELS PHOTOGRAPHY MEIOFAUNA PHYTOSOCIOLOGY METEOROLOGICAL DATA PICTORIAL HISTORY MIAMI,FL PIERS MINERAL SOLIDS PILES MISQUAMICUT,RI PIPELINES MISSION

  5. Xバンドレーダによる離岸流の観測(沿岸域の流れと物質循環(2),一般講演)

    OpenAIRE

    山川, 泰司; 武若, 聡; Yasushi, YAMAKAWA; Satoshi, TAKEWAKA; 筑大システム情報工学研究科; University of Tsukuba

    2007-01-01

    Averaged X-band radar images have been analyzed to detect occurrence of rip current. Radar images were collected at research pier HORS on a straight sandy coast. Rader images capture wave propagation, breaking and run-up motions. Hourly averaged images have been processed, in which characteristic cross shore patterns have been observed frequently. This pattern resembles to neck and head of a rip current captured in aerial images. Cross shore wave propagation speeds were smaller at zones where...

  6. Investigating The Self-Esteem of Elemantary Boarding Scholls' Students

    OpenAIRE

    SEÇER, İsmail; İLBAY, Azmi; AY, İsmail; ÇİFTÇİ, Muhammet

    2013-01-01

    In this study, the second-tier regional boarding primary schools, students are receiving education and self-esteem levels of age, gender, type of study, academic achievement and significant differences according to the variables  whether or not to take disciplinary action were investigated. 2010-2011 academic research in the regional boarding primary schools are receiving education in Erzurum, which was carried out on 428 students. Piers and Harris to collect data from the study (1964), devel...

  7. Department of the Navy FY 1985 Military Construction & Family Housing Program.

    Science.gov (United States)

    1984-02-01

    finishes, new roofing, air conditioning, fire protection systems, utilities upgrade; outdoor volleyball and . basketball court; vehicle parking and...submarines (SSBN). The new SSN-688 class attack submarines assigned to the base require a specially designed pier with a tapered end to allow room for the...opportunities for periods of adverse weather are restricted to the present gymnasium which is not long enough to accommodate a regulation basketball

  8. Study on the Spatial Stress of the Chongqing Yangtze River Bridge in China

    Directory of Open Access Journals (Sweden)

    Yan Li

    2014-09-01

    Full Text Available Continuous rigid-frame bridges are usually used in building bridges with long span and high piers. It is characterized by the consolidation between piers and beams in the middle of bridge piers and flexible bridge piers in the lower part. Among all the factors, curvature has the most obvious influence on the stress of curved continuous rigid-frame bridge, because of which, the curved beam bridge produces coupling effect of bending moment and receives complicated stress, leading to the deformation such as torsion and displacement of radial direction. No matter it is the castscaffold construction or cantilever construction, for continuous rigid-frame bridges, considering that after the long term creep of concrete, structure stress tends to be in a drop-frame state, so it is necessary to know the mechanical properties of the finished bridge. Taking the Chongqing Yangtze River Bridge as an example, this paper mainly analyzes the internal forces and deformations of a finished curved continuotus rigid-frame bridge by establishing a spatial finite element model with Midas Civil 2006 software and by changing the model’s radius of curvature. The results show that as the curvature increases, the vertical deformation and torsion angle of the long-span curved continuous rigid-frame bridge are both reduced under the effect of a dead load and prestressed load, presenting mechanical properties of bridge, namely, “coupling effect of bending moment”. In the model analyzed, the deformation of the bridge in the transverse direction also behaves a trend of gradual decrease with an increase in radius of curvature with the range 500–2000 m.

  9. Deconstruction of Oncogenic K-RAS Signaling Reveals Focal Adhesion Kinase as a Novel Therapeutic Target in NSCLC

    Science.gov (United States)

    2014-10-01

    Research Online (http://mcr.aacrjournals.org/). Corresponding Author: Pier Paolo Scaglioni, The University of Texas Southwestern Medical Center, 5323...WangS, et al. BAP1 loss defines a newclass of renal cell carcinoma. Nat Genet 2012;44:751–9. 28. Gandhi J, Zhang J, Xie Y, Soh J, Shigematsu H, Zhang W...Konstantinidou, C. Nardella, K. Cheng, P.P. Pandolfi*. *Co- corresponding authors. Translational-dependent mechanisms lead to PML upregulation and

  10. Case Histories of Corps Breakwater and Jetty Structures. Report 3. North Central Division

    Science.gov (United States)

    1988-06-01

    Presque Isle Breakwaters Presque Island Peninsula, Pennsylvania Date(s) Construction and Rehabilitation History 1978 Construction of three detached... Isle , Pennsylvania . .. 371 " ,"’ ? % .%’..•. P4. 04 .A -’ - -’- 0 Ov’W-e % % Table 92 Erie Harbor Piers Erie , Pennsylvania J .8 Date(s) Construction...1,618 1949 M Harbor, Mich. cc 16 Big Bay Harbor, B(2) S,SSP,CSSP 1,258 1960 R Mich. 17 Presque Isle B(1)

  11. 完全与离异家庭中子女自我概念的比较研究%Comparative Research on Middle School Student's Self-concept between Complete and Divorced Family

    Institute of Scientific and Technical Information of China (English)

    钞秋玲; 汪萍; 何宁

    2001-01-01

    Objective: To compare the difference of self-concept between children of complete and divorced family. Methods: 42 subjects in divorced family and 45 controls were tested by Piers-Harris Self-concept Scale for Children. Rusults: The students in divorced family reported significantly lower scores on self-concept than the controls on behavior,anxiety, gregariousness, satisfaction and total score. Conclusion: The self-concept of divorced family students is lower than that of the control group.

  12. Coast of California Storm and Tidal Waves Study. Southern California Coastal Photography and Beach Profile Index.

    Science.gov (United States)

    1986-02-01

    OBISPO COUNTY 17 TORRANCE ..... . ...... ............... 118.5-120.0 IS. SAN PEDRO ..................................... 119.0-1280 44. ARROYO GRANDE...Between Bangor and Dover Lanes, two views of groin from 100 ft upcoast and downcoast at berm. 205.10 Groin No. 7: End of San Pedro Road, two views of...Downcoast view of beach, from 4th guard rail post, from downcoast end of bluff, over-looking pier. 251.90 El Capitan State Beach: Downcoast view of beach

  13. National Dam Inspection Program. Lake Lattimore Dam (NDI-ID Number PA-00406, DER-ID Number 52-78) Delaware River Basin, Pike County, Pennsylvania. Phase I Inspection Report.

    Science.gov (United States)

    1980-06-01

    Appendix E) and the access footbridge to this structure was replaced with earthfill between two retaining walls. -6- SECTION 3 - VISUAL INSPECTION 3.1...LOPF -NO. FOO1’BR I DG; E-M ’AN KM EN’, lN 5AC.K(,ROlINl’ NU FOOTBRIDGE . NOTE DETERIORATION OF PIERS -NO. 4 SPILLWAY -NO. )&)WN’U R ’,IIANNi.",. NOi’F

  14. Lake Erie Water Level Study. Appendix B. Regulatory Works.

    Science.gov (United States)

    1981-07-01

    footbridge would be constructed over the alternative S2 gate bay to permit maintenance access from the Black Rock Lock side. A similar enclosed... footbridge would be provided over the alternative S3 gate bays to allow public access to the Bird Island Pier for recreational fishing. In addition to the...with connecting footbridges across the entrance to the proposed alternative S2 diversion channel; 6. A temporary ice boom across the Black Rock Canal

  15. National Program for Inspection of Non-Federal Dams. Chicopee Reservoir (MA 00720), Connecticut River Basin, Chicopee, Massachusetts. Phase I Inspection Report.

    Science.gov (United States)

    1981-06-01

    two span steel framed footbridge with a concrete deck and metal railing spans over the upstream chute section (see Photo No. 5). The depth of flow in...the section of the apron upstream of the footbridge to the spillway is in good condition. Erosion has occurred at the interface of the first reach of...surface cracking at the top of the intermediate concrete pier, the footbridge is in good condition with no evidence of spalls or erosion. The steel

  16. Preparing to Radically Transform China

    Institute of Scientific and Technical Information of China (English)

    1998-01-01

    ON December 25, 1919, a French ocean liner set off for Marseilles from Yangshupu Pier in Shanghai. Among the passengers were 30 people from Hunan, who were heading for a work-study program in France. Most of them were progressive youth; six of them were women, including: Xiang Jingyu, Cai Chang, Ge Jianhao, Li Zhixin, Xiong Jiguang and Xiao Shuliang. Cai Hesen, the older

  17. 77 FR 37604 - Safety Zone; Fourth of July Fireworks, Berkeley Marina, Berkeley, CA

    Science.gov (United States)

    2012-06-22

    ... SECURITY Coast Guard 33 CFR Part 165 Safety Zone; Fourth of July Fireworks, Berkeley Marina, Berkeley, CA... enforce the safety zone for the Berkeley Marina Fourth of July Fireworks display in the Captain of the... Berkeley Pier in position 37 51'40'' N, 122 19'19'' W (NAD 83) from 9:30 p.m. until 10:15 p.m. on July...

  18. Zwischen Faszination und Abwehr : Indienbilder in Reiseberichten italienischer Schriftsteller des 20. Jahrhunderts

    OpenAIRE

    Kleinert, Susanne

    2008-01-01

    Der Aufsatz analysiert folgende Reiseberichte italienischer Schriftsteller: Guido Gozzanos Verso la cuna del mondo. Lettere dall';India (1917), Alberto Moravia, Un';idea dell';India (1962), Pier Paolo Pasolinis L';odore dell';India (1962), Beppino Disertoris Esperienza dell';India (1966), Giorgio Manganellis Esperimento con l';India (1992) und Sandra Petrignanis Ultima India (1996). Nach Gozzanos ambivalenter Haltung zu Indien, die noch stark von kolonialistischen Bildern eines "barbarischen'...

  19. Allocating Marine Expeditionary Unit Equipment to Minimize Shortfalls. Third Edition

    Science.gov (United States)

    2015-01-01

    adversary forces. Prepara- tory fires; neutralizing chemical, biological, radiological , nuclear and high-yield explosives (CBRNE); and force protection may...entries at the top of the page provide a brief synopsis of scenario events to help orient the user. The first column lists the tasks and subtasks. It...CAS close air support CBRNE chemical, biological, radiological , nuclear and high-yield explosives CE command element CLOP cargo left on pier CMOC

  20. Parallel Measurements of Light Scattering and Characterization of Marine Particles in Water: An Evaluation of Methodology

    Science.gov (United States)

    2008-01-01

    turbid estuary of the Tijuana River to clear oligotrophic waters. To further expand the range of water types, additional field measurements are... Tijuana River to clear oligotrophic ocean water. As part of a NASA funded project, we sampled coastal waters on a regular basis to examine temporal... Beach and Scripps Pier. The two starred samples in panel A represent experiments with 100 μm microspheres, from which reliable concentration estimates

  1. Prevention and Treament of Botulism

    Science.gov (United States)

    2014-01-01

    These will be discussed in the fol- lowing sections 13.2.4 Recombinant Botulinum Vaccines Improvements in recombinant DNA techniques allowed for...186. Pier CL, Tepp WH, Bradshaw M, Johnson EA, Barbieri JT, Baldwin MR (2008) Recombi - nant holotoxoid vaccine against botulism. Infect Immun 76:437...Scherman D, Bigey P (2009) Generation of high-titer neutralizing antibodies against botuli- num toxins A, B, and E by DNA electrotransfer. Infect

  2. NRL Fact Book

    Science.gov (United States)

    1988-05-01

    trades training Long-term and special programs Instructional television via tape and microwave and satellite transmissions, as well as computer-based...Billboard Labstracts NRL Television Network Underwater Sound Reference Detachment (Orlando, FL) 7-acre lake with a large pier and instrumentation for...Multispectral image correlation Space sensor and mission analysis CROWN" STALK Time, ms (100 ms after impactO Time-history of the . radar backscatter from a

  3. Third Generation Graphics for Distributed Systems,

    Science.gov (United States)

    1983-02-01

    with which need to communicate are Unix 5 and TOtS-20.6 The principal network architectures are Internet 142] and PuP 19]. Pull is a precursor of the...Springer-Verlag, 1979, pp. 228-251. 30. B.W. Kernighan . Blit notes. Personal communication. 31. H.W. i ampson and K.A. Pier. A processor fbr a high

  4. California Least Tern Foraging Ecology in Southern California: A Review of Foraging Behavior Relative to Proposed Dredging Locations

    Science.gov (United States)

    2016-05-01

    freshwater species, including killifish (Fundulus parvipinnis) and mosquito fish (Gambusia affinis) (Atwood and ERDC/EL CR-16-3 2 Kelly 1984...event of oil spill. Three portable pools with mosquito fish provided near Pier 400 nesting site. Included surveys at 3 preferred foraging areas...review summarized available information on CLT biology , ecology, and predators in the first four sections; Section 5 is entitled “Known Effects of

  5. Public-Private Ventures for Morale, Welfare, and Recreation Activities. A Solution to the Loss of Appropriated Funds. Volume 6. Appendices M and N

    Science.gov (United States)

    1990-07-01

    4.75 Oyster Pointb 4.85 Oyster Cove 5.00 Grand Harbor 5.25 Marinship 5.50 Marina Village 5.75 Pier 39 5.88 Clipper 6.50 Kappa’s 6.50 Ballena Bay 6.88...holds about 600 yachts. Another 5,000 are berthed in the Oakland Inner Harbor, most on the Alameda side. Six hundred more are berthed at Ballena Bay on

  6. Ports and Waterways Safety Assessment Workshop Report. Kahului Harbor, Maui, Hawaii, 27-28 August 2009

    Science.gov (United States)

    2009-08-28

    usually 2 or 3 foreign cruise ships, and the Pride of America comes once per week to Kahului Harbor, generally to Pier 1. • Cruise ship traffic...a small geographic area in general. • Wayward kayaks sometimes encroach into cruise ship security zones. • Occasionally, swimmers think it’s a good...Harbor, the cruise ship Pride of America’s high profile causes the crew to have to run the bow thruster and stern thrusters to offset the winds. This

  7. 京石客运专线重点桥渡设计综述%The Summary of Important Bridge Design for Beijing-Shijiazhuang Passenger Dedicated Railway

    Institute of Scientific and Technical Information of China (English)

    牛远志

    2015-01-01

    With reference to the design of bridges on Beijing-Shijiazhuang passenger dedicated line, the focus is placed on the end thorn rigid frame, the Liu Xinzhuang rotating continuous beam, the Fifth Ring Road basket arch, the high pier large span rigid turnout beam and the high frame pier. A brief introduction is made to the four kinds of important pier design. The related results may provide references for future high-speed railway construction in China.%结合京石客运专线桥梁设计,着重介绍端刺刚构梁、柳辛庄转体连续梁、五环路提篮拱、高墩大跨刚构道岔梁、高框架墩等5项重点桥渡设计,简要介绍4项重点桥墩设计。相关成果可为今后的中国高速铁路建设提供借鉴。

  8. Pounding Effects in Simply Supported Bridges Accounting for Spatial Variability of Ground Motion: A Case Study

    Directory of Open Access Journals (Sweden)

    G. Tecchio

    2012-01-01

    Full Text Available This study carries out a parametrical analysis of the seismic response to asynchronous earthquake ground motion of a long multispan rc bridge, the Fener bridge, located on a high seismicity area in the north-east of Italy. A parametrical analysis has been performed investigating the influence of the seismic input correlation level on the structural response: a series of nonlinear time history analyses have been executed, in which the variation of the frequency content in the accelerograms at the pier bases has been described by considering the power spectral density function (PSD and the coherency function (CF. In order to include the effects due to the main nonlinear behaviours of the bridge components, a 3D finite element model has been developed, in which the pounding of decks at cap-beams, the friction of beams at bearings, and the hysteretic behaviour of piers have been accounted for. The sensitivity analysis has shown that the asynchronism of ground motion greatly influences pounding forces and deck-pier differential displacements, and these effects have to be accurately taken into account for the design and the vulnerability assessment of long multispan simply supported bridges.

  9. Research on the Stress Distribution of Rectangular Hole Castellated Beams Based on Numerical Calculation%基于数值计算的矩形孔蜂窝梁应力分布规律研究

    Institute of Scientific and Technical Information of China (English)

    王衡; 陈廷国

    2016-01-01

    According to the elastic analysis of rectangular hole castellated beams by using the finite element software ANSYS, the stress distribution of castellated beams was studied, which mainly included normal stress and shearing stress distribution of pier cross section, normal stress distribution of pier longitudinal section and normal stress distribution of beam bridge. In addition, the factors affecting the normal stress and shearing stress distribution of the center of pier cross section were studied in detail, which contained span-depth ratio, width-depth ratio, length-depth ratio and space-depth ratio. The research could provide reference for engineer-ing design.%通过有限元软件ANSYS对矩形孔蜂窝梁进行弹性分析,研究蜂窝梁应力分布规律,主要包括桥墩横截面正应力和剪应力分布、桥墩纵截面正应力分布及梁桥横截面正应力分布。另外,详细研究了跨高比、孔高比、长高比和距高比等因素对墩心横截面正应力和剪应力分布的影响。

  10. Downtown district cooling: A 21st century approach

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-12-01

    On December 1, 1992, the Board of Directors of the Metropolitan Pier and Exposition Authority (MPEA) met on Chicago`s historic Navy Pier and ushered in a new era of competition for energy supply in Chicago. The MPEA, a state agency created for the purposes of promoting and operating fair and exposition facilities within the Chicago area (including the McCormick Place exposition center and Navy Pier), voted to accept a third-party proposal to provide district heating and cooling services to the existing McCormick Place facilities and a million square feet of new exposition space. The winning bidder was a joint venture between Trigen Energy, the nation`s largest provider of district energy services, and Peoples Gas, the gas distribution company which serves Chicago. This vote culminated two years of effort by the Energy Division of Chicago`s Department of Environment to analyze the feasibility and promote the implementation of a district energy system to serve the expanded McCormick Place and its environs in the South Loop neighborhood. Initial services began in November, 1993, with a new hot and cold water piping system interconnecting the three existing exhibition facilities. The final buildout of the system, with a combined peak demand predicted at 160 MMBtu of heating and 15,920 tons of and cooling, is scheduled for completion in the summer of 1997.

  11. APLIKASI KONSEP BERBASIS PERPINDAHAN PADA PERENCANAAN PILAR BETON BERTULANG UNTUK STRUKTUR JEMBATAN

    Directory of Open Access Journals (Sweden)

    Takim Andriono

    2002-01-01

    Full Text Available Recently, displacement-based seismic design concept is being developed. According to this concept, structures are designed based on a certain displacement target. This paper presents the application of the displacement-based design concept to reinforced concrete bridge piers of 3, 5, 7, 9 11,and 13 m height. The design results are then analyzed by inelastic time history analysis using Ruaumoko computer program. The results of inelastic time history analysis show that for bridge piers with height 7 m or more, the actual drifts relatively fit the design drifts, while for the 3m and the 5m height piers, the actual drifts are significantly less than the design drifts. Abstract in Bahasa Indonesia : Akhir-akhir ini sedang dikembangkan metode perencanaan seismik struktur dengan konsep berbasis perpindahan. Dengan konsep ini struktur direncanakan berdasarkan target perpindahan yang dikehendaki. Tulisan ini membahas aplikasi konsep berbasis perpindahan pada perencanaan struktur pilar jembatan beton bertulang dengan ketinggian 3, 5, 7, 9, 11, dan 13 m. Hasil perencanaan kemudian dianalisis dengan analisis inelastik riwayat waktu dengan menggunakan program komputer Ruaumoko. Hasil analisis inelastik riwayat waktu menunjukkan bahwa untuk pilar dengan ketinggian 7m atau lebih drift yang terjadi cukup sesuai dengan drift yang direncanakan, sedangkan untuk pilar dengan ketinggian 3m dan 5m drift yang terjadi relatif jauh lebih kecil daripada drift yang direncanakan.

  12. Bathymetric and velocimetric surveys at highway bridges crossing the Missouri River in and into Missouri during summer flooding, July-August 2011

    Science.gov (United States)

    Huizinga, Richard J.

    2012-01-01

    Bathymetric and velocimetric surveys were conducted by the U.S. Geological Survey, in cooperation with the Kansas and Missouri Departments of Transportation, in the vicinity of 36 bridges at 27 highway crossings of the Missouri River between Brownville, Nebraska and St. Louis, Missouri, from July 13 through August 3, 2011, during a summer flood. A multibeam echo sounder mapping system was used to obtain channel-bed elevations for river reaches ranging from 1,350 to 1,860 feet and extending across the active channel of the Missouri River. These bathymetric scans provide a "snapshot" of the channel conditions at the time of the surveys and provide characteristics of scour holes that may be useful in the development of predictive guidelines or equations for scour holes. These data also may be used by the Kansas and Missouri Departments of Transportation to assess the bridges for stability and integrity issues with respect to bridge scour during floods. Bathymetric data were collected around every pier that was in water, except those at the edge of water, in extremely shallow water, or surrounded by debris rafts. Scour holes were present at most piers for which bathymetry could be obtained, except at piers on channel banks, those near or embedded in lateral or longitudinal spur dikes, and those on exposed bedrock outcrops. Scour holes observed at the surveyed bridges were examined with respect to depth and shape. Although exposure of parts of foundational support elements was observed at several piers, at most sites the exposure likely can be considered minimal compared to the overall substructure that remains buried in bed material; however, there were several notable exceptions where the bed material thickness between the bottom of the scour hole and bedrock was less than 6 feet. Such substantial exposure of usually buried substructural elements may warrant special observation in future flood events. Previous bathymetric surveys had been done at several of the sites

  13. Design of T-Frame Bridge of Mashui River Bridge%马水河特大桥T形刚构桥设计

    Institute of Scientific and Technical Information of China (English)

    陈晓波

    2011-01-01

    Mashui River Bridge is a long span T-frame bridge with span arrangement (116 +116) m. The main girder of the bridge is a prestressed concrete girder of variable section, having a single cell single box and vertical webs. The top of the girder is 10.7 m in width and the bottom varies in round arc. The main pier of the bridge is 108 m high and the pier shaft is the high-rise rectangular hollow pier that has no solid section close to the top of the pier and is connected with the girder in a way of spatial frame. The foundation for the pier is composed of 24 nos. of φ2.5 m reinforced concrete bored piles, the concrete for the piles is of C30 and a 7.5 m high training dike is set at the footing of the pier. The BSAS and ANSYS are respectively used to conduct the structural static force calculation and spatial static and dynamic force analysis. The results of the calculation and analysis show that the static force, wind resistance, seismic resistance and dynamic response of the vehicle and bridge can all satisfy the relevant requirements in the codes. The pier shaft of the bridge is constructed by the backward inclined cantilever formwork and the main girder is constructed by the free balanced cantilever concreting method.%马水河特大桥为(116+116)m的大跨度T形刚构桥.主梁采用变截面预应力混凝土箱梁,单箱单室直腹板,箱梁顶宽10.7 m,梁底缘按圆弧变化.主墩高108 m,墩身采用矩形空心高墩,墩顶不设实体段,与梁部按空间框架形式相接,桩基采用24-φ2.5 m钢筋混凝土钻孔桩,混凝土强度等级为C30,在墩底设置7.5 m高的导流堤.分别采用BSAS和ANSYS对全桥进行结构静力计算及空间静力和动力分析.分析结果表明:该桥静力、抗风、抗震、车桥动力响应验算结果均满足规范要求.该桥主墩墩身采用后倾式悬臂模板法施工,主梁采用对称悬臂浇筑法施工.

  14. Monitoring of levees, bridges, pipelines, and other critical infrastructure during the 2011 flooding in the Mississippi River Basin: Chapter J in 2011 floods of the central United States

    Science.gov (United States)

    Densmore, Brenda K.; Burton, Bethany L.; Dietsch, Benjamin J.; Cannia, James C.; Huizinga, Richard J.

    2014-01-01

    more prone to erosion or scour. Data collected from multibeam echosounder hydrographic surveys at selected bridges aided State agencies in evaluating the structural integrity of the bridges during the flood, by assessing the amount of scour present around piers and abutments. Hydrographic surveys of the riverbed detected scour depths ranging from zero (no scour) to approximately 5.8 meters in some areas adjacent to North Dakota bridge piers, zero to approximately 6 meters near bridge piers in Nebraska, and zero to approximately 10.4 meters near bridge piers in Missouri. Substructural support elements of some bridge piers in North Dakota, Nebraska, and Missouri that usually are buried were exposed to moving water and sediment. At five Missouri bridge piers the depth of scour left less than 1.8 meters of bed material between the bottom of the scour hole and bedrock. State agencies used this information along with bridge design and construction information to determine if reported scour depths would have a substantial effect on the stability of the structure. Multibeam echosounder hydrographic surveys of the riverbed near pipeline crossings did not detect exposed pipelines. However, analysis of the USGS survey data by pipeline companies aided in their evaluation of pipeline safety and led one company to further investigate the safety of their line and assisted another company in getting one offline pipeline back into operation. Multibeam echosounder hydrographic surveys of the banks, riverbed, and underwater infrastructure at Omaha Public Power District power plants documented the bed and scour conditions. These datasets were used by Omaha Public Power District to evaluate the effects that the flood had on operation, specifically to evaluate if scour during the peak of the flood or sediment deposition during the flood recession would affect the water intake structures. Hydrographic surveys at an Omaha Public Power District electrical transmission tower documented scour so

  15. 港珠澳大桥非通航孔桥钻孔平台施工方案比选%Comparison and Selection of Construction Schemes for Boring Platform of Non-Navigable Span Bridge of Hong Kong-Zhuhai-Macau Bridge

    Institute of Scientific and Technical Information of China (English)

    刘运洪

    2015-01-01

    The non‐navigable span bridge of Contract CB05 of the Hong Kong‐Zhuhai‐Macao Bridge is a 85‐m span steel and concrete continuous composite girder bridge .The foundations for the piers of the bridge are the ones of steel pipe composite piles .At each pier ,6 composite piles are provided and there are totally 372 piles for the whole bridge .In the light of the structural fea‐tures and construction difficulties of the bridge ,the construction schemes of a common boring plat‐form of the"steel pipe piles+ sectional steels" structure (Scheme 1) and an integral boring plat‐form of the"integral steel truss type"structure (Scheme 2) were proposed for construction of the foundations .T hrough comparison of those aspects of the civilization construction ,safety ,environ‐ment protection ,construction efficiency and construction cost ,it was determined that the Scheme 2 should be selected .For the Scheme 2 ,the components of the boring platform were all fabricated in workshop following the standardization requirements and were welded into the integral steel truss structure .The steel truss structure was then transported by ship to the pier site where the structure would be installed or integrally removed for repeated usage at other pier sites by floating crane and at this stage , the construction of the boring platform was completed . The selected Scheme 2 can effectively shorten the time interval of shifting the platform from pier site to pier site and has advantages of high efficiency , safety , environment protection , energy saving and fast speed .%港珠澳大桥CB05标非通航孔桥为跨径85 m的钢-混组合连续梁桥,采用钢管复合桩基础,每墩均由6根钢管复合桩组成,全桥共372根。针对该桥结构特点和施工难点,桩基础施工提出了“钢管桩+型钢”结构的普通钻孔平台(方案1)和“整体桁架式”结构的整体钻孔平台(方案2)施工方案,通过文明施工、安全环保、

  16. Comparison of Shallow Survey 2012 Multibeam Datasets

    Science.gov (United States)

    Ramirez, T. M.

    2012-12-01

    The purpose of the Shallow Survey common dataset is a comparison of the different technologies utilized for data acquisition in the shallow survey marine environment. The common dataset consists of a series of surveys conducted over a common area of seabed using a variety of systems. It provides equipment manufacturers the opportunity to showcase their latest systems while giving hydrographic researchers and scientists a chance to test their latest algorithms on the dataset so that rigorous comparisons can be made. Five companies collected data for the Common Dataset in the Wellington Harbor area in New Zealand between May 2010 and May 2011; including Kongsberg, Reson, R2Sonic, GeoAcoustics, and Applied Acoustics. The Wellington harbor and surrounding coastal area was selected since it has a number of well-defined features, including the HMNZS South Seas and HMNZS Wellington wrecks, an armored seawall constructed of Tetrapods and Akmons, aquifers, wharves and marinas. The seabed inside the harbor basin is largely fine-grained sediment, with gravel and reefs around the coast. The area outside the harbor on the southern coast is an active environment, with moving sand and exposed reefs. A marine reserve is also in this area. For consistency between datasets, the coastal research vessel R/V Ikatere and crew were used for all surveys conducted for the common dataset. Using Triton's Perspective processing software multibeam datasets collected for the Shallow Survey were processed for detail analysis. Datasets from each sonar manufacturer were processed using the CUBE algorithm developed by the Center for Coastal and Ocean Mapping/Joint Hydrographic Center (CCOM/JHC). Each dataset was gridded at 0.5 and 1.0 meter resolutions for cross comparison and compliance with International Hydrographic Organization (IHO) requirements. Detailed comparisons were made of equipment specifications (transmit frequency, number of beams, beam width), data density, total uncertainty, and

  17. The Swedish Bohus granite - a stone with a fascinating history

    Science.gov (United States)

    Schouenborg, Björn; Eliasson, Thomas

    2015-04-01

    One of the most well-known and well spread Swedish stone types used as building stones is the Bonus granite. It outcrops in an area north of Gothenburgh (SW Sweden), along the coastline, approximately 35 km wide and 85 km long. The granite continues into Norway as the Iddefjord granite. The Bohus granite is one of Sweden's youngest granites. Isotopic dating shows that the magma cooled at about 920 M years ago and thus marking the end of the Sveconorwegian orogoney. It is a composite granite massif area with several granitic intrusions but with rather homogeneous mineralogy. However, colour and texture varies quite a lot and the colour ranges from red to reddish grey although some pure grey varieties occur sparsely. The grain size ranges from medium grained to coarse grained and even with some porphyric parts. Quarrying in an industrial scale started 1842. The merchant A C Kullgren opened the first quarry and produced stones for the construction of the 86 km long Trollhättan channel connecting lake Vänern and the Atlantic ocean in the SW Sweden The stone was used for constructing harbors and wharves along the channel. Several quarries opened in the late 1800 around 1870 - 1890 and the export increased steadily with deliveries to Germany, Denmark, Holland, England and even to South America. The stone industries in Bohuslän (Bohus county), at its peak in 1929, engaged around 7 000 employees. During the depression in 1930 almost all of them became unemployed. However, as a curiosity, production and export continued to Germany for construction of Germania, the future World capital city ("Welthauptstadt Germania"), planned by Adolf Hitler and Albert Speer. About 500 stone workers were kept employed for this project during the late thirties. Today several varieties are still produced: Evja/Ävja, Tossene, Brastad, Näsinge, Broberg, Nolby, Allemarken and Skarstad. However, the number of stone workers is far from that of the early 1900. The Swedish production is mainly

  18. Field measurements and analyses of environmental vibrations induced by high-speed Maglev.

    Science.gov (United States)

    Li, Guo-Qiang; Wang, Zhi-Lu; Chen, Suwen; Xu, You-Lin

    2016-10-15

    Maglev, offers competitive journey-times compared to the railway and subway systems in markets for which distance between the stations is 100-1600km owing to its high acceleration and speed; however, such systems may have excessive vibration. Field measurements of Maglev train-induced vibrations were therefore performed on the world's first commercial Maglev line in Shanghai, China. Seven test sections along the line were selected according to the operating conditions, covering speeds from 150 to 430km/h. Acceleration responses of bridge pier and nearby ground were measured in three directions and analyzed in both the time and frequency domain. The effects of Maglev train speed on vibrations of the bridge pier and ground were studied in terms of their peak accelerations. Attenuation of ground vibration was investigated up to 30m from the track centerline. Effects of guideway configuration were also analyzed based on the measurements through two different test sections with same train speed of 300km/h. The results showed that peak accelerations exhibited a strong correlation with both train speed and distance off the track. Guideway configuration had a significant effect on transverse vibration, but a weak impact on vertical and longitudinal vibrations of both bridge pier and ground. Statistics indicated that, contrary to the commonly accepted theory and experience, vertical vibration is not always dominant: transverse and longitudinal vibrations should also be considered, particularly near turns in the track. Moreover, measurements of ground vibration induced by traditional high-speed railway train were carried out with the same testing devices in Bengbu in the Anhui Province. Results showed that the Maglev train generates significantly different vibration signatures as compared to the traditional high-speed train. The results obtained from this paper can provide good insights on the impact of Maglev system on the urban environment and the quality of human life

  19. How current are leading evidence-based medical textbooks? An analytic survey of four online textbooks.

    Science.gov (United States)

    Jeffery, Rebecca; Navarro, Tamara; Lokker, Cynthia; Haynes, R Brian; Wilczynski, Nancy L; Farjou, George

    2012-12-10

    The consistency of treatment recommendations of evidence-based medical textbooks with more recently published evidence has not been investigated to date. Inconsistencies could affect the quality of medical care. To determine the frequency with which topics in leading online evidence-based medical textbooks report treatment recommendations consistent with more recently published research evidence. Summarized treatment recommendations in 200 clinical topics (ie, disease states) covered in four evidence-based textbooks--UpToDate, Physicians' Information Education Resource (PIER), DynaMed, and Best Practice--were compared with articles identified in an evidence rating service (McMaster Premium Literature Service, PLUS) since the date of the most recent topic updates in each textbook. Textbook treatment recommendations were compared with article results to determine if the articles provided different, new conclusions. From these findings, the proportion of topics which potentially require updating in each textbook was calculated. 478 clinical topics were assessed for inclusion to find 200 topics that were addressed by all four textbooks. The proportion of topics for which there was 1 or more recently published articles found in PLUS with evidence that differed from the textbooks' treatment recommendations was 23% (95% CI 17-29%) for DynaMed, 52% (95% CI 45-59%) for UpToDate, 55% (95% CI 48-61%) for PIER, and 60% (95% CI 53-66%) for Best Practice (χ(2) (3)=65.3, P<.001). The time since the last update for each textbook averaged from 170 days (range 131-209) for DynaMed, to 488 days (range 423-554) for PIER (P<.001 across all textbooks). In online evidence-based textbooks, the proportion of topics with potentially outdated treatment recommendations varies substantially.

  20. Micellar-polymer joint demonstration project, Wilmington Field, California. Annual report, 1976--1977

    Energy Technology Data Exchange (ETDEWEB)

    Wade, J.E.

    1977-12-01

    Work accomplished under the contract during the first year of operation consisted of Micellar-Polymer laboratory systems design; Test Pattern Model Studies; Drilling and coring injection well FT-1; Pressure Transient Tests of Wells Z-81, Z1-16and FT-1; as well as design and construction of a portion of the surface facilities. Radial core floods conducted by Marathon Research Center using reservoir rock and fluid samples from the Wilmington Field demonstrated that Micellar-Polymer systems showing good recovery efficiency could be made from several different commercially available sulfonates. Residual oil saturations obtained were as low as 7 to 10% pore volume. Sulfonates made from Wilmington crude oil also proved to be effective. Polyacrylamides, both liquid and dry, as well as polysaccharides proved equally effective as a mobility buffer. Test pattern model studies were conducted on seven different arrays of wells. These studies showed that the pattern originally proposed exhibited poor areal sweep efficiency and was seriously affected by waterflood operations in the North Flank of the fault block. An E-W staggered line drive backed-up against the Pier A Fault appeared to be the best pattern studied, assuming the Pier A Fault to be a pressure barrier. Injection well FT-1 was drilled, cored and completed in the Hx/sub a/ sand. Cores were taken using low-solids, polymer drilling fluid and were frozen on site. The frozen cores from the project area will be used in the Phase B laboratory work. Pressure Transient Tests run in Z-81 and Z1-16 indicated the Pier A Fault to be pressure competent. The plant site was located adjacent to a railroad siding near the injection wells. The site was graded and seven 2000 barrel tanks were erected. The tanks were internally plastic coated on site. Mixing, filtering and injection facilities are being installed.

  1. Longitudinal force in continuously welded rail on long-span tied arch continuous bridge carrying multiple tracks

    Institute of Scientific and Technical Information of China (English)

    YAN Bin; DAI Gong-lian; GUO Wen-hua; XU Qing-yuan

    2015-01-01

    Considering arch rib, lateral brace, suspender, girder, pier and track position, the model for the interaction between long-span tied arch continuous bridge and multiple tracks was established by using steel-concrete composite section beam element to simulate concrete-filled steel tube (CFST) arch rib, using the beam element with rigid arm to simulate the prestressed concrete girder and using nonlinear bar element to simulate longitudinal constraint between track and bridge. Taking a (77+3×156.8+77) m tied arch continuous bridge with four tracks on the Harbin-Qiqihar Passenger Dedicated Line as an example, the arrangement of continuously welded rail (CWR) was explored. The longitudinal force in CWR on the tied arch continuous bridge, the pier top horizontal force and torque due to the unbalance load case, were analyzed under the action of temperature, vertical live load, train braking and wind load. Studies show that, it can significantly reduce track displacement to set the track expansion devices at main span arch springing on both sides; the track stress due to arch temperature variation can reach 40.8 MPa; the track stress, pier top horizontal force and torque are related to the number of loaded tracks and train running direction, and the bending force applied to unloaded track is close to the loaded track, while the braking force applied to unloaded track is 1/4 to 1/2 of the loaded track; the longitudinal force of track due to the wind load is up to 12.4 MPa, which should be considered.

  2. High-fidelity numerical modeling of the Upper Mississippi River under extreme flood condition

    Science.gov (United States)

    Khosronejad, Ali; Le, Trung; DeWall, Petra; Bartelt, Nicole; Woldeamlak, Solomon; Yang, Xiaolei; Sotiropoulos, Fotis

    2016-12-01

    We present data-driven numerical simulations of extreme flooding in a large-scale river coupling coherent-structure resolving hydrodynamics with bed morphodynamics under live-bed conditions. The study area is a ∼ 3.2 km long and ∼ 300 m wide reach of the Upper Mississippi River, near Minneapolis MN, which contains several natural islands and man-made hydraulic structures. We employ the large-eddy simulation (LES) and bed-morphodynamic modules of the Virtual Flow Simulator (VFS-Rivers) model, a recently developed in-house code, to investigate the flow and bed evolution of the river during a 100-year flood event. The coupling of the two modules is carried out via a fluid-structure interaction approach using a nested domain approach to enhance the resolution of bridge scour predictions. We integrate data from airborne Light Detection and Ranging (LiDAR), sub-aqueous sonar apparatus on-board a boat and in-situ laser scanners to construct a digital elevation model of the river bathymetry and surrounding flood plain, including islands and bridge piers. A field campaign under base-flow condition is also carried out to collect mean flow measurements via Acoustic Doppler Current Profiler (ADCP) to validate the hydrodynamic module of the VFS-Rivers model. Our simulation results for the bed evolution of the river under the 100-year flood reveal complex sediment transport dynamics near the bridge piers consisting of both scour and refilling events due to the continuous passage of sand dunes. We find that the scour depth near the bridge piers can reach to a maximum of ∼ 9 m. The data-driven simulation strategy we present in this work exemplifies a practical simulation-based-engineering-approach to investigate the resilience of infrastructures to extreme flood events in intricate field-scale riverine systems.

  3. REDUCTION IN INCIDENCE OF HOSPITALIZATIONS FOR PSYCHOTIC EPISODES THROUGH EARLY IDENTIFICATION AND INTERVENTION

    Science.gov (United States)

    McFarlane, William R.; SUSSER, EZRA; McCleary, Richard; Verdi, Mary; Lynch, Sarah; Williams, Deanna; McKeague, Ian W

    2014-01-01

    Objective This study tested whether the incidence of hospitalization for psychosis was reduced by a community-wide system of early identification and intervention to prevent onset of psychosis. Method The Portland Identification and Early Referral (PIER) program was initiated in 2001. Youth and young adults ages 12-35 were identified by professionals in a wide variety of educational, health and mental health settings. PIER staff assessed, confirmed risk for psychosis and provided treatment for 24 months to eligible and consenting young people (N=148). The monthly rate of hospital admissions for first episode psychosis was the outcome measure for efficacy of identification and intervention. Admission rates before and after the program began accepting referrals were compared, both in the experimental area and in aggregated urban areas of Maine. ARIMA models were used to assess the effect. Results Based on ARIMA models, the rate of hospitalized psychosis decreased significantly by 26% (95% C.I., -64% to -11%) in the Greater Portland area. Conversely, it increased by 8% (95% C.I. -5% to +36%) in the Urban Control area. Including increases in the control area, the actual vs. expected difference (-26% -8%) was -34%. The change was largest for non-affective-non-schizophrenic Disorders. Conclusions PIER demonstrated that population-wide early identification is feasible. Preventive intervention can reduce rates of initial hospitalizations for psychosis in a mid-sized city. Clinical trial registration The study was reviewed and approved by the Maine Medical Center Institutional Review Board and registered at ClinicalTrials.gov (NCT01597141). All research subjects gave informed consent prior to participating. PMID:24632857

  4. Critical insights for advanced bridge scour detection using the natural frequency

    Science.gov (United States)

    Bao, Ting; Andrew Swartz, R.; Vitton, Stanley; Sun, Ye; Zhang, Chao; Liu, Zhen

    2017-01-01

    Scour around bridge foundations is regarded as one of the predominant causes of bridge failures. The concept of vibration-based real-time bridge scour detection has been explored in recent years by investigating the change in the natural frequency spectrum of a bridge or a bridge component with respect to the scour depth. Despite the progress, significant issues still remain unsolved in the application of this concept. This paper investigates three unsolved issues in the current framework of scour detection using the natural frequency spectrum: the physical meaning of the measured predominant natural frequency, the location of sensor installation, and the influence of the shape of scour holes, which are easily neglected but critical to the further implementations of the natural frequency spectrum-based bridge scour detection. Firstly, in-depth discussions of these three major issues were made separately by numerically modeling the scour progression of a typical and documented laboratory test. Laboratory tests were then performed to validate the conclusions made in the discussions. It was found that for an eigenproblem of the system with soil-structure interaction, the physical meaning of the natural frequency obtained from modal analysis can be understood by comparing the modal natural frequency with the natural frequency calculated from the dynamic response of the test component in that system. The results also verified that the obtained predominant natural frequency of the pier body greatly varies with the location of the pier body where a sensor is mounted for signal pickup. The shape of the scour hole affects the predominant natural frequency of the pier, causing difficulties in practical measurements. To address such a problem, a new criterion was proposed to identify the depth of unsymmetrical scour holes for the first time, which is of practical significance to advance the natural frequency spectrum-based scour detection framework.

  5. Empirical Design of Scour Protections around Monopile Foundations

    DEFF Research Database (Denmark)

    De Vos, L.; De Rouck, J.; Troch, P.;

    2011-01-01

    Together with new opportunities, offshore wind farms raise new engineering challenges. An important aspect relates to the erosion of bottom material around the foundation of the wind turbines, caused by the local increase of the wave and current induced flow velocities by the pile's presence....... Typically, the expected scour has a considerable impact on the stability and dynamic behavior of the wind turbine and a scour protection is placed to avoid erosion of the soil close to the foundation. Although much experience exists on the design of scour protections around bridge piers (which are placed...

  6. Correlation study between self-concept and behavior problems among primary school boarders%寄宿小学生自我意识与行为问题的相关性研究

    Institute of Scientific and Technical Information of China (English)

    郭华贵; 朱进才; 王玲; 徐国洪; 黎勇航; 俞翠芳; 谭宇康

    2014-01-01

    Objective To explore the correlations between self-concept and behavior problems among pri-mary school boarders .Methods Assessments were conducted with the Piers-Harris Children’s Self-Con-cept Scale (PHCSS) and Achenbach Child Behavior Checklist (CBCL) in 170 primary school boarders and 182 non-boarders .Results Boarders had lower score on the total PHCSS ,anxiety ,gregariousness ,and CBCL social competence(P<0 .05 or 0 .01) and higher on total behavior problems ,introverted and extro-verted behavior problem (P<0 .05 or 0 .01)compared with non-boarders ;correlation analysis suggested that anxiety and gregariousness factor score were significantly negatively related to introverted behavior problem (P<0 .01) .Conclusion Boarders’ negative self-concepts are closely related to introverted behav-ior problems .%目的:探讨寄宿小学生的自我意识与行为问题的相关性。方法选取170名寄宿小学生和182名非寄宿小学生采用Piers-Harris儿童自我意识量表及Achenbach儿童行为量表进行测评分析。结果寄宿小学生 Piers-Harris儿童自我意识量表总分、焦虑、合群分量表得分和Achenbach儿童行为量表的社会能力总分显著低于非寄宿小学生(P<0.05或0.01),行为问题总分及内向性行为问题、外向性行为维度得分显著高于非寄宿小学生( P<0.05或0.01);相关分析显示,寄宿小学生Piers-Harris儿童自我意识量表焦虑、合群分量表得分与Achenbach儿童行为量表内向性行为问题得分呈显著负相关(P<0.01)。结论寄宿小学生负性的自我意识与内向性行为问题密切相关。

  7. Goosebumps?

    Science.gov (United States)

    Friebele, Elaine

    Before surfing the waves at the beach this summer, surf the World Wide Web to learn how warm or cold the ocean water might be. Without sticking a toe in, you'll know whether its ice water or bath water from temperatures placed on-line by NOAA's National Oceanographic Data Center in Silver Spring, Md. Water temperatures are available for beaches along the Atlantic Coast from Eastport, Maine, to Key West, Fla.; along the Gulf Coast from Key West to South Padre Island, Tex.; along the Pacific Coast from Seattle, Wash., to Scripps Pier, Calif. Data for Puerto Rico, Bermuda, and parts of Mexico are also given.

  8. A Study of Requirements for Commercial Vessel Survival Systems

    Science.gov (United States)

    1975-02-20

    December 29, 1969, from San Juan, Puerto Rico , Master licensed by CG., Italian vessel. March 20, 1970, 17:40, Caribbean sea, shallow water south of...radio. May 16, 1973, NE coast of Puerto Rico , 08:30 hours. Weather - partly cloudy, visibility 4 miles, winds easterly at 12-20 kts, gusty, with air...of Bob Hall Pier, Padre Island, Texas. Weather - visibility 2 mi, wind SE 10-12 kts, gusty, 60 F, sea sloppy, 4-6 ft SE, swell SE. While

  9. General design of Sutong Bridge

    Institute of Scientific and Technical Information of China (English)

    Zhang Xigang; Yuan Hong; Pei Minshan; Dai Jie; Xu Lin

    2009-01-01

    The main span of Sutong Bridge is a double-pylon, double-plane cable-stayed bridge with steel box girder, which has the world's longest central span of 1 088 m within cable-stayed bridges. To overcome problems caused by severe meteorological conditions, perplexing hydrological conditions, deep buried bedrock and higher navigation level, many new technics and methods were created. Keys including structural system, steel box girder, stayed cable, tower, pier, tower foundation, collision avoidance system, wind-resistance, seismic-resistance, structural nonlinear response and structural static stability were presented individually in this paper.

  10. After Pasolini’s Teorema: Notes on the Theatre of Grzegorz Jarzyna and Mikołaj Mikołajczyk

    Directory of Open Access Journals (Sweden)

    Armando Rotondi

    2014-06-01

    Full Text Available The following contribution aims to analyse two adaptations of Pier Paolo Pasolini’s Teorema, written and directed by, respectively, Grzegorz Jarzyna and Mikołaj Mikołajczyk. In the first, T.E.O.R.E.M.A.T., Jarzyna works both on Pasolini’s novel and film, creating a performance composed of the distorted use of the voice, silent dialogues and proximity games, producing a highly conceptual effect. In his Wszystko jutro, czyli lalki wybawione, Mikołajczyk, on the other hand, recreates Pasolini’s story as a choreographed drama, which examines the dilemmas posed by the Italian author.

  11. Density Functional Theory Embedding for Correlated Wavefunctions

    Science.gov (United States)

    2014-01-01

    Van Barel, J. Comput. Appl. Math. 213, 268 (2008). [52] M. Gu and S. C. Eisenstat, SIAM J. Matrix Anal. Appl. 16, 172 (1995). [53] M. Schutz, R. Lindh ...Analysis and Methods , (Dover Pub- lishing, 2003). 93 [56] H.-J. Werner, P. J. Knowles, R. Lindh , F. R. Manby, M. Schütz et al. Molpro, ver- sion...43] T. M. Henderson, J. Chem. Phys. 125, 014105 (2006). [44] B. Swerts, L. F. Chibotaru, R. Lindh , L. Seijo, Z. Barandiaran, S. Clima, K. Pier- loot

  12. Necropsy report of a fin whale (Balaenoptera physalus) stranded in Denmark in 2010

    DEFF Research Database (Denmark)

    Alstrup, Aage K. O.; Hedayat, Abdi; Jensen, Trine Hammer;

    2013-01-01

    There is little detailed information on stranded fin whales (Balaenoptera physalus) in the scientific literature (Notarbartolo di Sciara et al., 2003). In Denmark, at least eight fin whales stranded between the years 1603 and 1958 (Kinze, 1995). On 16 June 2010, a live subadult or adult male fin...... whale stranded in the Bay of Vejle (55º 69' N, 9º 58' E), Denmark. Despite several attempts, it was not possible to rescue the fin whale, which was only partially exposed by the water. The fin whale succumbed after 5 d stranded in shallow water. The dead fin whale was transported to a nearby pier...

  13. A fatal case of air-bag-mediated liver injury in an unrestrained driver.

    Science.gov (United States)

    Uemura, Koichi; Uchida, Kyoko; Nara, Akina; Ochiai, Eriko

    2009-04-01

    A middle-aged man, who drove a small vehicle while drunken and not wearing a seat belt, crashed head on into a pier wall at a high speed. The rapid air-bag deployment caused abdominal compression of the driver, who was found dead 2 m away from the car. There were facial front-glass injuries and multiple rib fractures, but no head injury. Autopsy disclosed liver laceration with intra-abdominal hemorrhage (2,000 mL), resulting in hemorrhagic shock. This is the first autopsy report of liver laceration caused by the rapid expansion of an air-bag during an automobile crash.

  14. Results of repeat bathymetric and velocimetric surveys at the Amelia Earhart Bridge on U.S. Highway 59 over the Missouri River at Atchison, Kansas, 2009-2013

    Science.gov (United States)

    Huizinga, Richard J.

    2013-01-01

    Bathymetric and velocimetric data were collected six times by the U.S. Geological Survey, in cooperation with the Kansas Department of Transportation, in the vicinity of Amelia Earhart Bridge on U.S. Highway 59 over the Missouri River at Atchison, Kansas. A multibeam echosounder mapping system and an acoustic Doppler current meter were used to obtain channel-bed elevations and depth-averaged velocities for a river reach approximately 2,300 feet long and extending across the active channel of the Missouri River. The bathymetric and velocimetric surveys provide a “snapshot” of the channel conditions at the time of each survey, and document changes to the channel-bed elevations and velocities during the course of construction of a new bridge for U.S. Highway 59 downstream from the Amelia Earhart Bridge. The baseline survey in June 2009 revealed substantial scour holes existed at the railroad bridge piers upstream from and at pier 10 of the Amelia Earhart Bridge, with mostly uniform flow and velocities throughout the study reach. After the construction of a trestle and cofferdam on the left (eastern) bank downstream from the Amelia Earhart Bridge, a survey on June 2, 2010, revealed scour holes with similar size and shape as the baseline for similar flow conditions, with slightly higher velocities and a more substantial contraction of flow near the bridges than the baseline. Subsequent surveys during flooding conditions in June 2010 and July 2011 revealed substantial scour near the bridges compared to the baseline survey caused by the contraction of flow; however, the larger flood in July 2011 resulted in less scour than in June 2010, partly because the removal of the cofferdam for pier 5 of the new bridge in March 2011 diminished the contraction near the bridges. Generally, the downstream part of the study reach exhibited varying amounts of scour in all of the surveys except the last when compared to the baseline. During the final survey, velocities throughout the

  15. Razonamiento lógico-matemático en las escuelas

    OpenAIRE

    Oscar Gómez Berrocal; Rocío Berrocal Mora

    2002-01-01

    Resumen. Fundamentados en el desarrollo de su tesis de licenciatura “Estrategia metodológica para el desarrollo del razonamiento lógico-matemático”, presentado ante la División de Educación Rural del CIDE, los autores explican las seis etapas propuestas por el matemático alemán Zoltan Pier Dienes y proponen una alternativa para profundizar y lograr un mejor rendimiento en el desarrollo del pensamiento fáctico.

    El lector encontrará una p...

  16. Razonamiento lógico-matemático en las escuelas

    OpenAIRE

    Berrocal Mora, Rocío; Gómez Berrocal, Oscar

    2002-01-01

    Fundamentados en el desarrollo de su tesis de licenciatura “Estrategia metodológica para el desarrollo del razonamiento lógico-matemático”, presentado ante la División de Educación Rural del CIDE, los autores explican las seis etapas propuestas por el matemático alemán Zoltan Pier Dienes y proponen una alternativa para profundizar y lograr un mejor rendimiento en el desarrollo del pensamiento fáctico. El lector encontrará una propuesta metodológica, amparada en los presupuestos teóricos del p...

  17. Aerodynamic stability of cable-stayed-suspension hybrid bridges

    Institute of Scientific and Technical Information of China (English)

    ZHANG Xin-jun; SUN Bing-nan

    2005-01-01

    Three-dimensional nonlinear aerodynamic stability analysis was applied to study the aerodynamic stability of a cable-stayed-suspension (CSS) hybrid bridge with main span of 1400 meters, and the effects of some design parameters (such as the cable sag, length of suspension portion, cable plane arrangement, subsidiary piers in side spans, the deck form, etc.) on the aerodynamic stability of the bridge are analytically investigated. The key design parameters, which significantly influence the aerodynamic stability of CSS hybrid bridges, are pointed out, and based on the wind stability the favorable structural system of CSS hybrid bridges is discussed.

  18. ALICE honours two Italian suppliers

    CERN Multimedia

    2006-01-01

    From left to right: Robert Terpin (MIPOT), Pier Luigi Bellutti (ITC), Andrea Zanotti, President of ITC, Luciano Bosisio (Trieste University), Gennady Zinovjev (Kiev), Catherine Decosse (CERN), Lodovico Riccati, ALICE Collaboration Board Chair (INFN Torino), Paolo Giubellino (INFN Torino), Mario Zen, Director of ITC, Maurizio Boscardin (ITC), Paolo Tonella (ITC), Jurgen Schukraft, ALICE Spokesperson (CERN), Giacomo Vito Margagliotti (Trieste University), Nevio Grion (INFN Trieste), Marco Bregant (INFN Trieste) Front row from left to right: Paolo Traverso (ITC), Federico Carminati, ALICE Computing Project Leader (CERN), and Jean-Robert Lutz, ITS-SSD Project leader (IPHC Strasbourg).

  19. Speckle Interferometry at the USNO Flagstaff Station: Observations Obtained in 2003-2004 and 17 New Orbits

    Science.gov (United States)

    2008-04-01

    double star program. Thanks also to Blaise Canzian, Hugh Harris, Joan Martini, Alice Monet, Jeff Pier, and all the staff of the USNO Flagstaff...Circ., 156 Docobo, J. A., Balega, Y. Y., Ling, J. F., Tamazian, V., & Vasyuk, V. A. 2000, AJ, 119, 2422 Docobo, J. A., & Costa , J. M. 1984, IAU Comm. 26...Inf. Circ., 92 Docobo, J. A., & Costa , J. M. 1990a, IAU Comm. 26 Inf. Circ., 110 Docobo, J. A., & Costa , J. M. 1990b, IAU Comm. 26 Inf. Circ., 112

  20. L'ecclesiologia damianea. Per una possibile interpretazione di sintesi

    Directory of Open Access Journals (Sweden)

    Lorenzo Paolini

    2010-06-01

    Full Text Available L'autore si interroga se ai nostri giorni sia possibile conciliare, in una metodologia condivisa, le opposte interpretazioni dell'eremita e cardinale di Ostia. Lo studio si propone di identificare tendenze, adattabilità e originalità dell'ecclesiologia di Pier Damiani, per quanto riguarda le urgenze incombenti della Riforma, rivolgendo attenzione alle relazioni tra la Chiesa mistica e la Chiesa storica, tra papa e imperatore e anche ai poteri giudiziari della Chiesa romana e al primato petrino.