大胜关长江大桥动力特性现场测试与分析  

Field Test and Analysis on Dynamic Performance of Dashengguan Yangtze River Bridge

作　　者：孟鑫[1] 姚京川[1] 刘鹏辉[1] 王巍[1] 杨宜谦 柯在田[1] 

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081

出　　处：《中国铁道科学》2015年第3期30-36,共7页China Railway Science

基　　金：国家自然科学基金资助项目(51378500);中国铁路总公司科技研究开发计划项目(2013G004-A-2)

摘　　要：采用车—线—桥系统试验的方法,测试动车组通过大胜关长江大桥及邻近线路区段时车辆、轨道和桥梁的动力响应,对该桥的动力特性进行现场测试与分析。结果表明:桥梁的横、竖向刚度均满足相关规范和设计文件要求;动车组作用下,梁体最大动力增量为设计荷载的5%,梁体最大竖向振动加速度为0.32m·s-2(20Hz低通数字滤波后),未出现共振现象,桥梁整体动力性能良好;在现有桥梁结构型式组合的条件下,车辆与桥梁的相互作用水平要小于由线路状况突变引起的轮轨相互作用;动车组经过主桥和引桥过渡区段时,梁体竖向刚度的差异对车辆、轨道和桥梁的动力响应有一定影响。With the method of vehicle-track-bridge system test,the dynamic response of vehicle,track and bridge was tested when EMU passing Dashengguan Yangtze River bridge and adjacent track section.Field tests and analyses were carried out on the dynamic performance of the bridge.The results indicated that both the lateral and vertical rigidity of the bridge met the requirements of related specifications and design documents.The maximum dynamic increment of beam body was about 5% of design load when EMU passing through the bridge,and the maximum vertical vibration acceleration of beam body was 0.32m·s-2（after 20 Hz low-pass digital filtering）.No resonance phenomenon occurred and the whole dynamic performance of the bridge was fine.Under the existing bridge structure combination,the interaction of vehicle and bridge was smaller than that of wheel and rail due to the sudden change of track condition.The difference in the vertical rigidity of beam body would definitely affect the dynamic response of the vehicle,track and bridge when EMU passing through the main bridge and the transition section of approach span.

关 键 词：高速铁路 连续钢桁拱桥 大跨度 动力特性 试验 过渡段 车—线—桥 

分 类 号：U448.36[建筑科学—桥梁与隧道工程] U448.53[交通运输工程—道路与铁道工程]