杭州湾跨海大桥车桥空间耦合振动参数分析  

Parametric Analysis of Three-dimensional Coupling Vibration for Hangzhou Bay Bridge

作　　者：韩万水[1] 陈艾荣[2] 

机构地区：[1]长安大学桥梁与隧道陕西省重点实验室,陕西西安710064 [2]同济大学桥梁工程系,上海200092

出　　处：《公路交通科技》2008年第5期56-60,79,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金资助项目(50478109);交通部西部交通建设科技资助项目(2003319H01010)

摘　　要：将整个车桥系统划分为车辆与桥梁两个子系统,引入车桥系统几何协调条件和力学平衡关系,采用含增量动力平衡迭代格式的Newmark-β方法编制了汽车-桥梁系统空间耦合振动分析程序,并采用弹簧质量系统匀速通过简支梁对程序的可靠性进行了验证。然后以杭州湾跨海大桥为工程实例,运用所编制程序详细研究了车辆数目、车辆间距、不同车道、车辆相向行驶、不同路面粗糙度以及不同车速时车流通过桥梁时主梁跨中的动力响应和冲击系数。研究发现:主梁跨中冲击系数随着路面粗糙度变坏而明显增大,与车辆数目、车辆间距、车辆相向行驶以及车速没有必然联系。Coupling vehicle bridge vibration system were treated as two subsystems, one for the bridge and the other for the vehicle, the geometric and mechanical coupling relations between vehicle and bridge were introduced, the Newmark-β method described in incremental dynamic equilibrium iteration equation was used to work out nonlinear three-dimensional coupling vibration program, whose reliability was proved using sprung mass moving over a beam.In the vehicle-bridge analysis for response and impact factor at midspan of Hangzhou Bay Bridge, the effects of vehicle number, vehicle distance, vehicle lane, two-way direction, road surface roughness and vehicle speed were discussed.The results show that impact factor at girder mid-span become large with the road condition becoming worse while the impact factors don＇ t have inevitable relationship with vehicle number, vehicle distance, two-way direction and vehicle speed.

关 键 词：桥梁工程 斜拉桥 增量动力平衡迭代 耦合振动参数 车桥系统 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]