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Influence of pier height on the safety of trains running on high-speed railway bridges during earthquakes
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作者 NIE Yu-tao GUO Wei +8 位作者 JIANG Li-zhong YU Zhi-wu ZENG Chen WANG Yang HE Xu-en REN Shao-xun HUANG Ren-qiang LIANG Guang-yue LI Chang-qing 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第6期2102-2115,共14页
Sudden earthquakes pose a threat to the running safety of trains on high-speed railway bridges,and the stiffness of piers is one of the factors affecting the dynamic response of train-track-bridge system.In this paper... Sudden earthquakes pose a threat to the running safety of trains on high-speed railway bridges,and the stiffness of piers is one of the factors affecting the dynamic response of train-track-bridge system.In this paper,a experiment of a train running on a high-speed railway bridge is performed based on a dynamic experiment system,and the corresponding numerical model is established.The reliability of the numerical model is verified by experiments.Then,the experiment and numerical data are analyzed to reveal the pier height effects on the running safety of trains on bridges.The results show that when the pier height changes,the frequency of the bridge below the 30 m pier height changes greater;the increase of pier height causes the transverse fundamental frequency of the bridge close to that of the train,and the shaking angle and lateral displacement of the train are the largest for bridge with 50 m pier,which increases the risk of derailment;with the pier height increases from 8 m to 50 m,the derailment coefficient obtained by numerical simulations increases by 75% on average,and the spectral intensity obtained by experiments increases by 120% on average,two indicators exhibit logarithmic variation. 展开更多
关键词 pier height high-speed railway bridge running safety numerical model
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Reliability-based life-cycle cost seismic design optimization of coastal bridge piers with nonuniform corrosion using different materials
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作者 Wu Xiangtong Yuan Wenting Guo Anxin 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2024年第1期209-225,共17页
Reinforcement corrosion is the main cause of performance deterioration of reinforced concrete(RC)structures.Limited research has been performed to investigate the life-cycle cost(LCC)of coastal bridge piers with nonun... Reinforcement corrosion is the main cause of performance deterioration of reinforced concrete(RC)structures.Limited research has been performed to investigate the life-cycle cost(LCC)of coastal bridge piers with nonuniform corrosion using different materials.In this study,a reliability-based design optimization(RBDO)procedure is improved for the design of coastal bridge piers using six groups of commonly used materials,i.e.,normal performance concrete(NPC)with black steel(BS)rebar,high strength steel(HSS)rebar,epoxy coated(EC)rebar,and stainless steel(SS)rebar(named NPC-BS,NPC-HSS,NPC-EC,and NPC-SS,respectively),NPC with BS with silane soakage on the pier surface(named NPC-Silane),and high-performance concrete(HPC)with BS rebar(named HPC-BS).First,the RBDO procedure is improved for the design optimization of coastal bridge piers,and a bridge is selected to illustrate the procedure.Then,reliability analysis of the pier designed with each group of materials is carried out to obtain the time-dependent reliability in terms of the ultimate and serviceability performances.Next,the repair time of the pier is predicted based on the time-dependent reliability indices.Finally,the time-dependent LCCs for the pier are obtained for the selection of the optimal design. 展开更多
关键词 reliability-based design optimization(RBDO) life-cycle cost(LCC) nonuniform corrosion coastal bridge pier REPAIR
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Experimental investigation on seismic performance of rigid frame tied-arch bridge with split-piers 被引量:3
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作者 丁文胜 吕志涛 +2 位作者 刘钊 臧华 李国亮 《Journal of Southeast University(English Edition)》 EI CAS 2006年第4期534-538,共5页
A novel seismic design method, namely split-pier seismic design, is proposed. A vertical gap and connect elements are set in split-piers. The lateral stiffness of piers is reduced by cracking of the connect elements u... A novel seismic design method, namely split-pier seismic design, is proposed. A vertical gap and connect elements are set in split-piers. The lateral stiffness of piers is reduced by cracking of the connect elements under severe earthquake, and the seismic response of bridges is reduced by avoiding the site predominant periods. A model of tied-arch rigid frame bridge with split-piers was designed. Seismic performance was investigated by pseudo-static experimentation on the scale model, The failure process of split-piers, the hysteresis characteristic and the effect of split-piers on the superstructure are presented. Results show that the split-pier has better seismic performance than common ductile piers do. 展开更多
关键词 seismic design split-pier pier rigid frame tied-arch bridge seismic performance
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FREE VIBRATION ANALYSIS OF SHEAR WALLS WITH SHORT PIERS 被引量:1
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作者 黄东升 刘世美 +2 位作者 华新钰 刘俊龙 艾军 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2006年第3期194-201,共8页
The equations of the lateral deflection curve of the short pier shear wall under a lateral concentrated load at any level are derived by employing a continuous approach. Lateral flexibility matrixes for the dynamic an... The equations of the lateral deflection curve of the short pier shear wall under a lateral concentrated load at any level are derived by employing a continuous approach. Lateral flexibility matrixes for the dynamic analysis are also obtained by repeatedly calculating the lateral unit load on the wall at each level where a lumped mass located. Dynamic analyses are implemented for short pier shear walls with different parameters, called the integrative coefficient and the pier strength coefficient related to the dimensions of walls. The influences of two coefficients on the dynamic performances of the structure are studied. Results indicate that with the increase of the integrative coefficient, the periods of top two modes apparently decrease but the other periods of higher frequency modes show little variation when the pier strength coefficient remains constant. Similarly, if the integrative coefficient is constant, the top two periods of the free vibration decrease with the increase of the integrative coefficient but the other periods of higher frequency modes show less variation. 展开更多
关键词 shear wall with short piers dynamic analysis integrative coefficient pier strength coefficient
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Seismic performance of double- skin steel- concrete composite box piers: Part Ⅰ——Bidirectional quasi-static testing 被引量:6
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作者 夏坚 宗周红 +1 位作者 徐焯然 李明鸿 《Journal of Southeast University(English Edition)》 EI CAS 2016年第1期58-66,共9页
To study the seismic performance of double-skin steelconcrete composite box( DSCB) piers, a total of 11 DSCB pier specimens were tested under bidirectional cyclic loading. The effects of the loading pattern, the ste... To study the seismic performance of double-skin steelconcrete composite box( DSCB) piers, a total of 11 DSCB pier specimens were tested under bidirectional cyclic loading. The effects of the loading pattern, the steel plate thickness, the axial load ratio, the slenderness ratio and the aspect ratio were taken into consideration. The damage evolution process and failure modes of the tested specimens are presented in detail. Test results are also discussed in terms of the hysteretic curve, skeleton curve, ductility and energy dissipation capacity of DSCB pier specimens. It can be concluded that the hysteretic performance of DSCB piers in one direction is affected and weakened by the cyclic loading in the other direction. DSCB piers under bidirectional cyclic loading exhibit good performance in terms of load carrying capacity, ductility, and energy dissipation capacity. Overall, DSCB piers can meet the basic aseismic requirements. The research results can be taken as a reference for using DSCB piers as high piers in bridges in strong earthquakeprone areas. 展开更多
关键词 double-skin steel-concrete composite box(DSCB) pier bidirectional quasi-static testing hysteretic curve skeleton curve ductility energy dissipation capacity
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Piers-Harris儿童自我意识量表在湖南的修订 被引量:131
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作者 苏林雁 万国斌 +6 位作者 杨志伟 罗学荣 李雪荣 刘明华 李志祥 黄春香 王明祥 《中国临床心理学杂志》 CSCD 1994年第1期14-18,共5页
在湖南省有代表性的六个地区城乡分层随机采样864例,对Piers-Harris儿童自我意识量表进行修订,修改过程中刚除8条不符合我国文化背景及不符合测量学要求的项目,制定了湖南省常模,经信度、效度检验,认为达到了测量... 在湖南省有代表性的六个地区城乡分层随机采样864例,对Piers-Harris儿童自我意识量表进行修订,修改过程中刚除8条不符合我国文化背景及不符合测量学要求的项目,制定了湖南省常模,经信度、效度检验,认为达到了测量学要求。 展开更多
关键词 儿童 自我意识 量表 常模
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从’91PIERS看电磁学研究发展趋势 被引量:1
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作者 王志良 《电子学报》 EI CAS CSCD 北大核心 1992年第6期72-76,共5页
本文从“电磁学研究进展会议(’91 PIERS)”的角度阐述了电磁学研究的现状和发展趋势,对一些新兴的分支也作了简短的描述。
关键词 电磁学 发展 pierS
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Seismic performance of double-skin steel-concrete composite box piers: Part Ⅱ—Nonlinear finite element analysis
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作者 夏坚 宗周红 +1 位作者 徐焯然 李明鸿 《Journal of Southeast University(English Edition)》 EI CAS 2016年第3期346-355,共10页
An accurate finite element ( FE) model was constructed to examine the hysteretic behavior of double-skin steel-concrete composite box ( DSCB) piers for further understanding the seismic performance of DSCB piers;... An accurate finite element ( FE) model was constructed to examine the hysteretic behavior of double-skin steel-concrete composite box ( DSCB) piers for further understanding the seismic performance of DSCB piers; where the local buckling behavior of steel tubes, the confinement of the in-filled concrete and the interface action between steel tube and in-filled concrete were considered. The accuracy of the proposed FE model was verified by the bidirectional cyclic loading test results. Based on the validated FE model, the effects of some key parameters, such as section width to steel thickness ratio, slenderness ratio, aspect ratio and axial load ratio on the hysteretic behavior of DSCB piers were investigated. Finally, the skeleton curve model of DSCB piers was proposed. The numerical simulation results reveal that the peak strength and elastic stiffness decrease with the increase of the section width to steel thickness ratio. Moreover, the increase of the slenderness ratio may result in a significant reduction in the peak strength and elastic stiffness while the ultimate displacement increases. The proposed skeleton curve model can be taken as a reference for seismic performance analyses of the DSCB piers. 展开更多
关键词 double-skin steel-concrete composite box(DSCB) pier finite element analysis local buckling hysteretic behavior skeleton curve model
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支承门式墩施工支架的既有线桥梁可靠性分析
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作者 张兵兵 《山西建筑》 2025年第1期138-143,共6页
针对支承门式墩施工支架的既有线桥梁可靠性分析研究相对不足的问题,研究结合实际工程实例,建立了一种针对门式墩施工对上跨既有线桥梁进行可靠性分析的计算方法。该方法首先计算初步设计的施工支架对既有桥梁的作用力;然后对既有桥梁... 针对支承门式墩施工支架的既有线桥梁可靠性分析研究相对不足的问题,研究结合实际工程实例,建立了一种针对门式墩施工对上跨既有线桥梁进行可靠性分析的计算方法。该方法首先计算初步设计的施工支架对既有桥梁的作用力;然后对既有桥梁进行实体建模分析,主梁采用八节点六面体线性减缩积分单元(C3D8R),预应力筋采用两节点线性三维桁架单元(T3D2),并将预应力钢筋以嵌入(Embed)方式置于混凝土模型内部,网格尺寸设定为1 cm,严格依照图纸进行精细装配;此外,通过模拟降温过程以施加预应力筋的预应力;然后对混凝土的强度、变形以及开裂情况进行可靠性分析。基于分析结果对初步设计的支架结构提供了针对性的改进建议。实际工程应用显示:采用这种方法进行计算,能够切实保证门式墩施工过程的安全性,同时确保既有桥梁在施工阶段的可靠性。 展开更多
关键词 桥梁工程 门式墩施工技术 仿真分析 上跨既有桥梁
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Experimental Study on Local Scour Around Bridge Piers in Tidal Current 被引量:13
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作者 韩玉芳 陈志昌 《海洋工程:英文版》 2004年第4期669-676,共8页
Local scour around a bridge pier is an important parameter for the design of a bridge. Compared with the local scour in a mono-directional current, the local scour in a tidal current has its unique characteristics. In... Local scour around a bridge pier is an important parameter for the design of a bridge. Compared with the local scour in a mono-directional current, the local scour in a tidal current has its unique characteristics. In this paper, several aspects of local scour around bridge piers in tidal current, including the scour development process, the plane form of a scour hole and the maximum scour depth, are studied through movable bed flume experiments. 展开更多
关键词 bridge pier local scour tidal current
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Numerical Analysis of Interaction Between Pile-Supported Pier and Bank Slope 被引量:5
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作者 WANG Nianxiang(王年香) 《China Ocean Engineering》 SCIE EI 2001年第1期117-128,共12页
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... 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. 展开更多
关键词 INTERACTION pile-supported pier bank slope numerical analysis
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Rapid repair techniques for severely earthquake-damaged circular bridge piers with flexural failure mode 被引量:9
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作者 Sun Zhiguo Li Hongnan +2 位作者 Bi Kaiming Si Bingjun Wang Dongsheng 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2017年第2期415-433,共19页
In this study, three rapid repair techniques are proposed to retrofit circular bridge piers that are severely damaged by the flexural failure mode in major earthquakes. The quasi-static tests on three 1:2.5 scaled ci... In this study, three rapid repair techniques are proposed to retrofit circular bridge piers that are severely damaged by the flexural failure mode in major earthquakes. The quasi-static tests on three 1:2.5 scaled circular pier specimens are conducted to evaluate the efficiency of the proposed repair techniques. For the purpose of rapid repair, the repair procedure for all the specimens is conducted within four days, and the behavior of the repaired specimens is evaluated and compared with the original ones. A finite element model is developed to predict the cyclic behavior of the repaired specimens and the numerical results are compared with the test data. It is found that all the repaired specimens exhibit similar or larger lateral strength and deformation capacity than the original ones. The initial lateral stiffness of all the repaired specimens is lower than that of the original ones, while they show a higher lateral stiffness at the later stage of the test. No noticeable difference is observed for the energy dissipation capacity between the original and repaired pier specimens. It is suggested that the repair technique using the early-strength concrete jacket confined by carbon fiber reinforced polymer (CFRP) sheets can be an optimal method for the rapid repair of severely earthquake-damaged circular bridge piers with flexural failure mode. 展开更多
关键词 rapid repair severely earthquake-damaged circular bridge piers flexural failure mode CFRP early-strengthconcrete
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Experimental research and finite element analysis of bridge piers failed in flexure-shear modes 被引量:6
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作者 Sun Zhiguo Si Bingjun +1 位作者 Wang Dongsheng Guo Xun 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2008年第4期403-414,共12页
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) anal... 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. 展开更多
关键词 RC bridge piers flexure-shear failure seismic behavior finite element ANSYS software
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Simulation of two-phase debris flow scouring bridge pier 被引量:4
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作者 LIU Wei HE Si-ming 《Journal of Mountain Science》 SCIE CSCD 2017年第11期2168-2181,共14页
Debris flows are typical two-phase flows, which commonly accompany erosion in mountainous areas, and may destroy bridge engineering by scouring. In this study, a physically-based two-phase model is applied for the sim... Debris flows are typical two-phase flows, which commonly accompany erosion in mountainous areas, and may destroy bridge engineering by scouring. In this study, a physically-based two-phase model is applied for the simulation of debris flow scouring of bridge pier. In this model, the shear stress of debris flow on an erodible bed is considered to be a function of the solid shear stress, fluid shear stress, and volume fraction; accordingly, the erosion is incorporated into the two-phase model. Using a highaccuracy computational scheme based on the finite volume method, the model is employed for simulating a dynamic debris flow over an erodible bed. The numerical results are consistent with the experimental data, and verify the feasibility of the two-phase model. Moreover, a simple numerical test is performed to exhibit the fundamental behaviour of debris flow scouring of bridge pier, which shows that the degree of erosion on each side of the pier is higher compared to other areas. The scouring depth is influenced by the variations of solid volume fraction and velocity of debris flow and pier width. 展开更多
关键词 pier SCOURING DEBRIS flow Two-phasemodel Numerical SIMULATION
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Rapid repair of severely earthquake-damaged bridge piers with flexural-shear failure mode 被引量:7
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作者 Sun Zhiguo Wang Dongsheng +1 位作者 Du Xiuli Si Bingjun 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2011年第4期553-567,共15页
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 f... 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. 展开更多
关键词 bridge piers rapid repair after earthquakes flexural-shear failure carbon fiber reinforced polymers (CFRP) cyclic testing
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Research on Motion Performance of the Mobile Double-Causeway Pier System 被引量:4
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作者 余建星 田佳 +5 位作者 徐金利 张翼飞 杨晓蓉 谭振东 董文斌 杜尊峰 《China Ocean Engineering》 SCIE EI 2008年第2期267-276,共10页
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 middl... 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. 展开更多
关键词 offshore mobile pier system multi-floating body potential theory double P-M spectrum hydrodynamic analysis
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Shake table study on precast segmental concrete double-column piers 被引量:5
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作者 Xia Zhanghua Ge Jiping +1 位作者 Lin Youqin Qiu Faqiang 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2020年第3期705-723,共19页
Seismic capacity,including the ultimate load-carrying capacity and ultimate deformation capacity of precast segmental concrete double-column(PSCDC)piers with steel sleeve(SS)connection or grouted corrugated-metal duct... Seismic capacity,including the ultimate load-carrying capacity and ultimate deformation capacity of precast segmental concrete double-column(PSCDC)piers with steel sleeve(SS)connection or grouted corrugated-metal duct(GCMD)connection,has been verified to be similar to those of cast-in-place(CIP)piers by quasi-static tests.However,the lack of knowledge of seismic response characteristics and damage process of PSCDC piers has limited their application in high-intensity seismic areas.Therefore,shake table tests,using variable types and intensities of seismic ground motions,were performed to investigate the seismic behavior of connection joints and to evaluate the seismic performance of PSCDC piers with SS and GCMD connections.Also,a finite element analysis(FEA)model was developed to study the influence of design parameters on the seismic behavior of the piers.The results showed that the main damage in PSCDC piers was caused by the cyclic opening and closing of connection joints.Under high-intensity ground motions,the PSCDC piers had a lower seismic performance than the CIP piers due to a significant decrease of their integrity and stiffness.The seismic performance of PSCDC piers is comparable to CIP piers when using an appropriate initial stress of the prestressing tendons. 展开更多
关键词 CONCRETE pier DAMAGE
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Nonlinear Stability Analysis of Long Span Continuous Rigid Frame Bridge with Thin Wall High Piers 被引量:3
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作者 LiLi PengYuancheng LongXiaohong LiaoPing 《Journal of China University of Geosciences》 SCIE CSCD 2005年第1期72-78,共7页
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 fram... 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. 展开更多
关键词 thin wall high pier rigid frame bridge finite element analysis nonlinear stability.
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Seismic damage analysis of the outlet piers of arch dams using the finite element sub-model method 被引量:2
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作者 Song Liangfeng Wu Mingxin +1 位作者 Wang Jinting Xu Yanjie 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2016年第3期617-626,共10页
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... 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. 展开更多
关键词 arch dam outlet pier seismic damage reinforcement measure FE sub-model method
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Rigid-Plastic Dynamic Response of Reinforced Concrete Bridge Pier Impacted by Automobile 被引量:4
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作者 ZHENG Xiaoning DIAO Bo YE Yinghua 《Transactions of Tianjin University》 EI CAS 2006年第B09期254-257,共4页
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 ... 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. 展开更多
关键词 IMPACT pier RIGID-PLASTIC dynamic response
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