高速铁路车-桥耦合体系地震响应分析  

Seismic response analysis of train-bridge coupling system on high-speed railway

作　　者：刘智[1] 郭恩栋[1] 贺芊 梁升建 

机构地区：[1]中国地震局工程力学研究所中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080

出　　处：《地震工程与工程振动》2015年第3期119-124,共6页Earthquake Engineering and Engineering Dynamics

基　　金：中国地震局工程力学研究所基本科研业务专项经费项目(2011D01);"十二五"国家科技支撑计划项目(2014BAK03B01)

摘　　要：为了研究车桥耦合体系在地震作用下的响应,采用有限元方法,在现有有限元模型基础上,建立了更为精细的高速铁路车-桥耦合模型,计算了车桥体系的动力特性及典型地震动输入下的反应。同时还建立了单桥有限元模型,比较了单桥模型和车桥耦合模型的自振特性和地震响应的差异,得到了桥面加速度反应放大系数。结果表明:在给定的典型地震动作用下,车桥耦合模型地震响应放大系数与单桥模型有较大差异,同时输入地震动频谱特性对桥面地震加速度响应有显著影响。In order to study the dynamic response of the train-bridge coupling system during an earthquake, a more accurate and reasonable finite element method of train-bridge coupling model of high-speed railway system was established, a single bridge model was also set up for comparison. The dynamic characteristics and the seismic responses under typical ground motion were calculated, and the diversity of the single bridge model and train-bridge coupling model was compared and the acceleration amplification factor was also obtained. The results showed that there were obvious differences of the seismic responses between train-bridge model and single bridge model under typical seismic motions, and the spectral characteristics of earthquake motions have significant influence on the seismic acceleration response of the bridge.

关 键 词：高速铁路 车-桥耦合体系 地震响应 加速度放大系数 

分 类 号：U238[交通运输工程—道路与铁道工程] P315.9[天文地球—地震学]