斜拉桥在地震与列车荷载同时作用下的动力响应分析  

DYNAMIC RESPONSE OF CABLE-STAYED BRIDGE TO RUNNING TRAINS AND EARTHQUAKES

作　　者：韩艳[1] 夏禾[1] 郭薇薇[1] 

机构地区：[1]北京交通大学土木建筑工程学院

出　　处：《工程力学》2006年第1期93-98,68,共7页Engineering Mechanics

基　　金：国家自然科学基金(50478059)

摘　　要：为探讨在地震荷载作用下斜拉桥-列车系统的动力响应行为,运用桥梁结构动力学与车辆动力学的理论方法,通过车-桥耦合系统在地震动和轨道不平顺激励下的振动分析模型及相应的仿真计算程序,以跨越长江的武汉天兴洲公铁两用斜拉桥方案为研究对象,对在典型地震波激励下列车过桥的全过程进行了模拟。结果表明,地震对斜拉桥上运行列车的安全性有重要影响。The dynamic responses of trains running on cable-stayed bridges during earthquake are studied. A model of coupled train-bridge system is established, with seismic waves and track irregularities as the excitations. A computer simulation programme is developed to serve the purpose. A case study is performed in which a rail-cum-road cable-stayed bridge that will cross the Yangtze River in China is examined. By inputting the typical seismic waves to the train-bridge system, the whole history of the train running through the bridge is simulated and the dynamic responses of the bridge and the vehicles are calculated. Results show that seismic excitations have significant effects on the running safety of the train vehicles on the cable-stayed bridge.

关 键 词：斜拉桥 列车 地震 动力响应 行车安全 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]