主跨1092m特大跨度斜拉桥动力特性分析  

Dynamic CharacteristicsAnalysis of Long Span Cable-stayed Bridges with Main Span of 1092m

作　　者：郭占元[1] 郭向荣[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《中国西部科技》2010年第2期8-10,共3页Science and Technology of West China

摘　　要：通过建立客车与钢桁主梁斜拉桥的车桥耦合动力分析模型,并根据势能驻值原理及形成结构矩阵的"对号入座法则",导出了车桥系统的空间振动矩阵方程。计算了列车以不同速度通过该大跨度斜拉桥的空间振动响应,基于合理的列车走行性评价指标,检算该桥是否具有足够的横向、竖向刚度及良好的运营平稳性等动力特性,所得结果可为同类桥梁的相关评价分析提供参考。Through building vehicle-bridge coupling dynamic analysis model between train and steel truss girder cablestayed bridge,and based on the variational principle of the stationary potential energy and the ＂set- in-right position＂ rule of forming structural matrices,the space vibration equations in matrix form of the system are derived.Based on the reasonable train runability evaluations,the space vibration responses are calculated when the train runs through the longspan cable-stayed bridge at different speeds inoder to test if the bridge has sufficient lateral, vertical rigidity and a good operation stability of dynamic characteristics,etc.,The results provide a reference to correlated bridge＇ s evaluation and analysis.

关 键 词：钢桁主梁斜拉桥 车桥耦合振动 列车走行性 动力特性 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] TU311.3[交通运输工程—道路与铁道工程]