高速铁路32m简支箱梁动力特性试验分析  

Experimentai analysis of dynamic performance or 32 m-span simply-supported box-girder on high speed railway

作　　者：孟鑫[1,2] 刘鹏辉[1,2] 姚京川[1,2] 王巍[1,2] 尹京[1,2] 杨宜谦 

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081 [2]高速铁路轨道技术国家重点实验室,北京100081

出　　处：《铁道建筑》2016年第1期10-15,共6页Railway Engineering

基　　金：中国铁路总公司科技研究开发计划项目(2013G004-A-2);国家自然科学基金项目(51378500);中国铁道科学研究院基金项目(2015YJ041)

摘　　要：对我国高速铁路不同梁型32 m简支梁桥实测的竖向刚度、自振特性及动车组作用下动力响应进行了分析,并对动车组作用于桥梁结构的机理进行了探讨。研究结果表明:梁体挠跨比实测值远小于设计值和规范限值,自振频率实测值大于设计值和规范限值,具有较大的安全裕量和优化空间;梁体竖向动力响应存在第3阶超谐共振现象,横向动力响应存在墩梁一体耦合振动峰值。《高速铁路桥梁运营性能检定规定(试行)》(TG/GW 209—2014)中给出的静态和动态参数通常值更接近桥梁结构实际状况,能更好地用于评价桥梁结构的运营状态。The vertical stiffness,natural frequency and dynamic response of different types of 32 m-span simplysupported box-girder on high speed railway were tested and analyzed.The mechanism of the motor train unit acted on bridge structure was discussed.The results show that the measured value of the vertical stiffness is far less than the design value and the code value,the measured value of the natural frequency is far greater than the design value and the code value,which has a larger safety allowance and optimization space.The peaking effects of the vertical dynamical response would appear when the speed is closed to the third of super-harmonic resonance speed.And the peaking effects of the lateral dynamical response would appear when the forced frequency is closed to the pier-beam lateral frequency.The static and dynamic parameter ordinary values of Verification Standard for High Speed Railway Bridge Operation Performance（Trial）（TG/GW 209—2014） are more closer to actual situation,and it can be better used for evaluating operating condition.

关 键 词：高速铁路 简支箱梁 共振 超谐共振 动力性能 

分 类 号：U446.1[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]