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.
作者
刘潇
张楠
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)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
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)。
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
steel-concrete composite beam
hammer test
velocity mobility
vibration characteristics
pseudo excitation method
