非一致地震激励下列车—轨道—桥梁耦合振动及行车安全性研究  

Coupling Vibration and Running Safety of Train-Track-Bridge System under Non-Uniform Seismic Excitations

作　　者：雷虎军[1,2] 李小珍[2] 

机构地区：[1]福建工程学院土木工程学院,福建福州350118 [2]西南交通大学土木工程学院,四川成都610031

出　　处：《中国铁道科学》2014年第6期138-140,共3页China Railway Science

基　　金：国家自然科学基金资助项目(51378429);国家"九七三"计划项目(2013CB036301);国家"八六三"计划项目(2011AA11A103);校科研启动基金资助项目(GY-Z14077)

摘　　要：地震在影响桥梁结构本身安全性的同时，还会威胁其上列车的行车安全。对于高速铁路桥梁，除需满足桥梁抗震之外，还应确保地震时过桥车辆的行车安全性。理论研究和震害经验都表明，地震动具有空间变异性，包括行波效应、失相干效应、局部场地效应和衰减效应。因此，针对高速铁路桥梁，开展非一致地震激励下的列车一轨道一桥梁耦合振动及桥上列车的行车安全性研究，主要研究内容和结论如下。Earthquake affects the safety of bridge structure it- self and threatens the running safety of the train on bridge as well. As to high speed railway bridges, the requirements of the bridge seismic design must be met. But beyond that, the running safety of the train under seismic excitations must be ensued. Both the theoretical research and earthquake damage analysis indicate that earthquake ground motion has spatial variability. It includes four as- pects, traveling wave effect, incoherence effect, local site effect and attenuation effect. So, a series of studies around this subject are carried out, and the main contents and achievements are listed as follows.

关 键 词：高速铁路 非一致地震激励 空间变异性 行波效应 直接求解法 大质量法 大刚度法 相对运动法 列车—轨道—桥梁耦合 行车安全性 

分 类 号：U442.55[建筑科学—桥梁与隧道工程] TB123[交通运输工程—道路与铁道工程]