列车荷载激励下站房结构振动响应频域分析方法  

Frequency-domain analysis method for vibration responses of a high-speed railway station structure under train load excitation

作　　者：冉汶民 李青良 李小珍[1] 易兵 张迅 RAN Wenmin;LI Qingliang;LI Xiaozhen;YI Bing;ZHANG Xun(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;China Railway Eryuan Engineering Group Co.Ltd,Chongqing 430000,China;Chongqing City Transportation Development&Investment Group Co.Ltd.,Chongqing 430000,China)

机构地区：[1]西南交通大学桥梁工程系,成都610031 [2]中铁二院重庆勘察设计研究院有限责任公司,重庆430000 [3]重庆城市综合交通枢纽开发投资有限公司,重庆430000

出　　处：《振动与冲击》2018年第17期218-224,共7页Journal of Vibration and Shock

基　　金：重庆市应用开发计划重点项目(cstc2014yykfB30003)

摘　　要：为研究高铁站房结构在列车荷载激励下的振动问题,建立站房结构振动响应频域分析模型。以重庆沙坪坝综合交通枢纽为工程背景开展建模工作:建立了车辆-轨道耦合模型,轨道-土体有限元模型和站房结构有限元模型。由车辆-轨道模型求解得到动态轮轨力,通过施加动态轮轨力于轨道-土体模型的轨道正线求得站房柱底对应的振动幅值响应,并将此结果作为外荷载施加于站房结构有限元模型,最终求得站房结构的振动响应,在此基础上探讨了扣件刚度对站房振动的影响。结果表明:列车通过车站时,站房结构一楼办公室的振动响应最大,站房设计时,应重点关注办公室的振动问题;站房振动的主要频段范围为10~60 Hz,其峰值频率集中在40 Hz左右,采用减振措施时应关注40 Hz左右的振动;增加扣件刚度可以有效削减站房6.3~31.5 Hz频率范围内的振动响应,但40~80 Hz频率范围内的振动响应会增大。In order to study vibration problems of a high-speed railway station structure under train load excitation,a frequency domain analysis model for vibration responses of the station structure was established.Taking Chongqing Shapingba integrated transportation hub as an engineering background,a vehicle-track coupled model,a finite element(FE)model for track-soil and a FE model for the station structure were established.The dynamic wheel-rail force was solved with the vehicle-track model,and the vibration amplitude response at the column bottom of the station was solved using the track-soil FE model with the dynamic wheel-rail force exerted on the track line.The latter was taken as the external load to be applied on the station structure FE model,and finally the vibration response of the station structure was solved.Then,the influence of fastener stiffness on the station’s vibration was discussed.The results showed that the vibration response of the office at the first floor of the station is the largest when a train passes through the station;when designing the station,a lot of attentions should be paid to the office’s vibration problem;the main frequency range of the station vibration is within 10-60 Hz,its peak frequency is concentrated at 40 Hz;when taking vibration reduction measures,the station vibration at 40 Hz should be concerned;increase in fastener stiffness can effectively reduce the station vibration response within the frequency range of 6.3-31.5 Hz,but the station vibration response within the frequency range of 40-80 Hz rises.

关 键 词：站房结构 高铁车站 振动 频域模型 

分 类 号：U24[交通运输工程—道路与铁道工程] TB53[理学—物理]