大跨径轻轨桥梁车桥耦合振动分析  

Vehicle-bridge Coupling Vibration Analysis of Long-span Light Railway Bridge

作　　者：张海平[1] 

机构地区：[1]天津大学建筑工程学院,300072

出　　处：《特种结构》2016年第5期28-32,共5页Special Structures

摘　　要：为了简化车桥耦合振动的分析过程,介绍了利用简化的车辆模型在ANSYS单一环境中实现车桥耦合振动分析的方法。以一座三跨轻轨连续梁桥为例,分析行车速度和地震作用对车桥耦合振动的影响。结果表明,行车速度对桥梁跨中竖向位移影响较小,对横向位移和加速度响应影响较大;考虑地震作用与列车荷载共同作用后,桥梁竖向位移、加速度及轴力峰值大于仅有列车荷载作用下的结果,说明地震作用和列车荷载存在一定程度的耦合。In order to simplify the analysis process of vehicle-bridge coupling vibration, a method of vehiclebridge coupling vibration using simplified vehicle model was introduced in ANSYS. A three-span continuous beam light railway bridge was taken as an example to analyze the effect of speed and earthquake on vehiclebridge coupling vibration. The results showed that driving speed has little effect on vertical displacement of the bridge span but has greater effect on the lateral displacement and acceleration; After considering earthquake and train load together, vertical displacement, acceleration and peak axial force of the bridge were greater than the results just under the train load. The conclusion is that there is a certain degree of coupling between earthquake and the train load.

关 键 词：大跨轻轨桥梁 车桥耦合振动 轨道不平顺 行车速度 地震作用 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]