铁路双线连续钢桁梁桥竖向有载自振频率影响因素分析  

Influence factors on Vertical Load-Carrying Natural Frequency of Railway Double-Track Continuous Steel Truss Girder Bridge

作　　者：任剑莹[1] 苏木标[2] 李文平[3] 

机构地区：[1]石家庄铁道大学工程力学系,石家庄050043 [2]石家庄铁道大学大型结构健康诊断与控制研究所,石家庄050043 [3]石家庄铁道大学土木工程学院,石家庄050043

出　　处：《铁道标准设计》2012年第8期32-35,共4页Railway Standard Design

基　　金：铁道部科技研究开发计划项目(2007G028);铁道部科技研究开发计划项目(2008G015-A);河北省自然科学基金项目(E2010001095)

摘　　要：研究车辆参数和列车行车速度对车-桥系统竖向有载自振频率的影响情况。采用车-桥系统相互作用的计算模型,分别改变车辆参数和列车行车速度,计算铁路双线连续钢桁梁桥的竖向有载自振频率的变化情况。结果表明:车辆参数对桥梁竖向有载自振频率有一定影响,而桥梁竖向有载自振频率与行车速度无关。The article researches into the influences of vehicle parameters and the train speed on the vehicle-bridge system's vertical load-carrying natural frequency.Using the interactional vehicle-bridge system model,when the vehicle parameters and the train speed are respectively changed,the changed value of vertical load-carrying natural frequency in railway double-track continuous steel truss girder bridge is calculated.The results show that the bridge's vertical load-carrying natural frequency is impacted by the vehicle parameters,but it is independent of the train speed.

关 键 词：双线连续钢桁梁桥 车-桥系统 竖向有载自振频率 车辆参数 

分 类 号：U44[建筑科学—桥梁与隧道工程]