高速铁路简支钢-混结合箱梁振动特性研究  

Study on Vibration Characteristics of Simply Supported Steel-Concrete Composite Box Girder for High-speed Railway

作　　者：刘潇 张楠[1] 孙琪凯 LIU Xiao;ZHANG Nan;SUN Qikai(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing Infrastructure Investment Co.,Ltd.,Beijing 100101,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京市基础设施投资有限公司,北京100101

出　　处：《铁道学报》2024年第6期167-172,共6页Journal of the China Railway Society

基　　金：国家自然科学基金(52178101);中央高校基本科研业务费(2021YJS133)。

摘　　要：对一高速铁路32 m简支钢-混结合箱梁进行锤击试验,分析其振动特性。建立轨道-桥梁垂向耦合有限元模型,利用谐响应分析计算轨道-桥梁系统各板件的速度导纳,与试验结果进行对比,验证模型的有效性后分析振动在梁上的传递特性。采用虚拟激励法得到行车条件下的轮轨力,作用于有限元模型上,讨论钢-混顶板的混凝土厚度、扣件刚度等对钢-混结合箱梁振动的影响。为钢-混结合梁振动的进一步研究提供参考。A hammering test on a 32 m simply supported steel-concrete composite box girder of a high-speed railway was carried out to analyze its vibration characteristics.By establishing a vertical coupling finite element model of the track-bridge system,the velocity mobility of each plate of the track-bridge system was calculated using harmonic response analysis.After verification of the effectiveness of the model by comparing it with the experimental results,the transmission characteristics of vibration on the girder were analyzed.The pseudo excitation method was used to obtain the wheel-rail force under train running conditions,which was applied to the finite element model.The effects of the concrete thickness of steel-concrete top slab and fastener stiffness on the vibration characteristics of the steel-concrete composite box girder were discussed.It provides reference for further study on the vibration of steel-concrete composite beams.

关 键 词：钢-混结合箱梁 锤击试验 速度导纳 振动特性 虚拟激励法 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] U24[交通运输工程—道路与铁道工程]