列车移动荷载作用下曲线上桥梁的振动响应分析  

Dynamic Response of Railway Curved Bridges Under Train Loads

作　　者：李文会[1] 卢文良[2] 许克宾[2] 

机构地区：[1]北京城建设计研究院,北京100037 [2]北方交通大学土木建筑工程学院,北京100044

出　　处：《石家庄铁道学院学报》2001年第2期43-46,共4页Journal of Shijiazhuang Railway Institute

摘　　要：以列车移动荷载作用下曲线上桥梁系统为研究对象 ,采用车—桥系统的空间振动分析模型 ,以一箱型简支梁为例 ,用计算机模拟列车过桥的全过程 ,计算了列车荷载作用下曲线桥的动力响应、列车的脱轨系数、轮重减载率、列车运行平稳性指标 ,并与直线桥作了比较。In this paper,the vehicle curved bridge system is studied.The spatial analytical model of a train passing on a bridge with a span of 32m,as example,is simulated by computer.The dynamic response of the bridge,the derailment quotient and the load reduction rate of the wheels,and the running stability index of the train are caculated.The results are compared with those of the straigh bridges.All of the results show that the dynamic response of railway curved bridges under train loads is useful to civil enginering.

关 键 词：曲线上桥梁 动力响应 运行平衡性 振动 列车移动荷载 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]