大跨度铁路无砟轨道桥梁动力性能试验研究  

Test Study on the Dynamic Performance of Long-Span Railway Bridge with Ballastless Track

作　　者：卫星[1] 刘名君[2] 李俊[1] 强士中[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]中国中铁二院工程集团有限责任公司,四川成都610031

出　　处：《中国铁道科学》2008年第5期40-45,共6页China Railway Science

基　　金：铁道部科技研究开发计划项目(2005G015-E)

摘　　要：为检验、评估铁路大跨度预应力混凝土连续刚构桥梁的动力性能,验证大跨度桥上纵连板式无砟轨道的设计方法,对遂渝线新北碚嘉陵江大桥主桥（94 m＋168 m＋84 m）进行全桥动力试验研究。该桥的自振特性以及200 km·h^-1速度等级CRH2动车组和120 km·h^-1速度等级货物列车以不同速度通过桥梁时桥跨结构动力响应的试验结果表明,新北碚嘉陵江大桥连续刚构桥动力性能良好,具有良好的竖向刚度、横向刚度和结构强度,能够满足CRH2动车组以160-200 km·h^-1速度、120 km·h^-1速度等级货物列车以70-120 km·h^-1速度运行的安全性要求。In order to evaluate and inspect the dynamic performance of a long-span continuous rigid frame prestressed concrete railway bridge and validate the design method for the lengthways connected ballastless track on long-span bridge, the dynamic test study on the whole bridge was carried out on the main bridge （94 m＋168 m＋84 m） of Beibei New Jialing River Bridge on Suining-Chongqing Railway. The natural vibration and dynamic responses of this bridge structure were tested respectively under the condition that CRH2 high-speed train and freight train passed by the bridge at 200 and 120 km·h^-1. The testing results show that the bridge has good dynamic performance, enough vertical stiffness, transverse stiffness and structure strength. It can meet the requirements for the operation safety of CRH2 high-speed train passing at the speed of 160-200 km·h^-1 or 120 km·h^-1 freight train passing at the speed of 70-120 km·h^-1.

关 键 词：铁路桥梁 连续刚构 无砟轨道 动力性能 试验研究 

分 类 号：U448.215[建筑科学—桥梁与隧道工程]