多跨连续梁桥地震行波效应分析

英文篇名：Seismic Response Analysis for Continuous Beam Bridge under Excitation of Traveling Waves
中文刊名：水利与建筑工程学报
英文刊名：Journal of Water Resources and Architectural Engineering
作者：张静娟 ; 高大峰 ; 刘伯栋
英文作者：ZHANG Jing-juan ; GAO Da-feng ; LIU Bo-dong (Key Laboratory of Structural Engineering and Earthquake Resistance ; Ministry of Education ; Xi'an Scientific and Technical University of Architecture ; Xi'an ; Shaanxi 710055 ; China)
中文关键词：连续梁桥 ; 地震波 ; 行波效应 ; 地震反应分析
英文关键词：continuous beam bridge ; earthquake wave ; travelling wave effect ; seismic response analysis
出版日期：2009-06-15
机构：西安建筑科技大学结构工程与抗震教育部重点实验室;
年：2009
期：02
出版单位：水利与建筑工程学报

摘要

地震动输入一直是工程抗震研究所关注的焦点。多跨连续梁桥纵向延伸较长,进行地震反应分析时应考虑有限波速所引起的行波效应。以某座12跨预应力混凝土连续梁桥为例,推导了结构的运动方程,采用有限元结构分析软件ANSYS建立了该桥的动力分析模型,进行了动力特性分析和时程分析。通过输入不同波速的地震波,计算行波激励下桥梁的地震反应,并和一致激励下的结果进行对比,分析行波效应对桥梁地震反应的影响。结果表明:随着波速的增大,桥梁的地震反应先减小后增大。
The earthquake input pattern is always a principal focus in the research on the earthquake resistance of engineering structures.The long-span continuous beam bridge has a large extended length longitudinally,the travelling wave effect should be considered in the analysis.Taking a 12-span P.C.continuous beam bridge as an example,the dynamic equation of the structure is derived,and the dynamic model of the bridge is also established by using the finite element analysis program ANSYS.Furthermore,the modal analysis and time history analysis of the bridge are carried out.Under the influence of the different earthquake waves,the results of the seismic response analysis of the bridge are numerically simulated and compared.It is shown that the seismic response of the bridge is first reduced,then indused with the increase of the velocity.

引文

[1]李忠献,史志利.行波激励下大跨度连续刚构桥的地震反应分析[J].地震工程与工程振动,2003,23(2):68-76.
    [2]谢旭.桥梁结构地震响应分析与抗震设计[M].北京:人民交通出版社,2005.
    [3]宋一凡.公路桥梁动力学[M].北京:人民交通出版社,2000.
    [4]王明晔,叶爱君,胡世德.行波激励下多跨连续梁桥地震反应分析[J].结构工程师,2007,23(4):49-54.
    [5]郭继武.建筑抗震设计[M].北京:高等教育出版社,1990.