地震作用下高速列车与桥梁耦合振动分析  

Coupled vibration analysis of high speed train and bridge subjected to seismic excitation

作　　者：谭长建[1] 祝兵[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031

出　　处：《振动与冲击》2009年第1期4-8,共5页Journal of Vibration and Shock

摘　　要：为了研究地震作用下高速列车与桥梁耦合振动特性,通过分析JR300系列轮轨高速列车与高架桥在地震作用下的耦合振动,对轨道不平顺、不同地震波对耦合振动响应的影响进行比较研究。结果表明:轨道竖向不平顺会加大车体振动竖向加速度,在地震作用下,车体加速度会接近或超过规定限值;桥梁在地震与列车作用下,考虑轨道的竖向不平顺对桥梁的竖向响应影响较小;不同地震波激励对车桥振动响应影响有较大不同。To investigate the characteristic of coupled vibration of a high speed train and a bridge under seismic excitation,the effect of railway track irregularity and different seismic excitations were compared and investigated by analyzing the coupled vibration of the JR300 high speed train-bridge system under seismic excitation.The results showed that the vertical acceleration of the train will increase and approach the limit value,but the vertical response of the bridge will not be affected obviously,when railway track irregularity is considered;the influence level of the different seismic excitations is much different.

关 键 词：高速列车 耦合振动 地震作用 轨道不平顺 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]