近场地震作用下高速铁路简支梁桥的碰撞行为

英文篇名：Pounding Behavior of High-Speed Railway Simple Supported Bridges Under the Near-Fault Earthquakes
中文刊名：北京交通大学学报
英文刊名：Journal of Beijing Jiaotong University
作者：孟宪锋 ; 朱晞
英文作者：MENG Xian-feng ; ZHU Xi (School of Civil Engineering and Architecture ; Beijing Jiaotong University ; Beijing 100044 ; China)
中文关键词：近场地震 ; 简支梁 ; 碰撞 ; 固定支座
英文关键词：near-fault earthquake ; simple supported bridge ; pounding ; fixed pin bearing
出版日期：2006-08-30
机构：北京交通大学土木建筑工程学院,北京交通大学土木建筑工程学院北京100044,北京100044
年：2006
期：04
出版单位：北京交通大学学报

摘要

近场地面运动有显著的改变结构响应的特点,使结构产生较大的内力和位移,高速铁路简支梁桥与普通铁路简支梁一样存在着梁缝,在近场地震作用下由于相邻两跨梁之间或是梁与桥台之间运动的不协调导致发生碰撞,这种碰撞现象可能会造成梁体的脱落.本文研究了碰撞现象对桥梁结构产生的不利影响,认为对固定铰支座的影响很大,在支座设计时应该给予重视.
The neat-fault ground motion can dramatically influence response characteristic of the structures.And it can increase the internal force and the displacement of the structures.Because high-speed railway simple supported beam bridges also have the expansion joints as general simple supported beam bridges,the pounding will happen between adjacent beams or beams and abutment.And the pounding can cause beams falling.In this paper,the effect caused by pounding to the bridges was studied.The conclusion was draw that the pounding between two decks have heavy influence on the fixed pin bearings.This fact had not been noticed for a long time in the bridges designing.

引文

[1]王东升,冯启民,凌贤长,等.桥梁非线性地震反应分析若干问题研究现状[J].地震工程与工程振动,2002,22(1):61-66.Wang Dong_sheng,Feng Qi_min,Lin Xian_zhang,et al.State_of_the_art of Nonlinear Seismic Response Analysis ofRC Bridge[J].Earthquake Engineering and EngineeringVibration,2002,22(1):61-66.(in Chinese)
    [2]Sang_Hyo Kim,Sang_Woo Lee,Ho_Seong Mha.DynamicBehaviors of the Bridge Considering Pounding and FrictionEffects Under Seismic Excitations[J].Structural Engi-neering and Mechanics,2000,10(6):621-633.
    [3]Robert Jamkowski,Kezysztof Wilde,Yozo Fujino.Pound-ing of Superstructure Segments in Isolated Elevated BridgeDuring Earthquakes[J].Earthquake Engineering andStructural Dynamics,1998,27:487-502.
    [4]铁道部专业设计院.混凝土桥[M].北京:中国铁道出版社,1998:146-147.Speciality Design Institute of the Ministry of Railway.Conrete_Bridge[M].Beijing:China Railway PublishingHouse,1998:146-147.(in Chinese)