平行双孔地铁隧道对上部结构的地震反应分析  

The analysis of buildings above intersecting tunnels under earthquake

作　　者：李延涛 刘欣宜 温永刚 宗金辉 LI Yantao;LIU Xinyi;WEN Yonggang;Z0NG Jinhui(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China;China Construction Three Bureau Group Co. ,Ltd. Engineering General Contract Firms,Tianjin 300000, China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]中建三局集团有限公司工程总承包公司,天津300000

出　　处：《四川建筑科学研究》2018年第6期34-38,共5页Sichuan Building Science

基　　金：河北省科技计划项目(16275406D)

摘　　要：考虑地铁隧道对上部结构的影响,对采用层状场地平行双隧道和上部建筑物的地震反应三维有限元模型进行了研究。主要分析了隧道埋深、平行隧道水平间距、建筑物自振频率等因素在不同地震波情况下对建筑物地震反应的影响。研究表明:天津波作用下,随着埋深的增大,影响逐渐减小;在El-Centro波作用下,随着埋深的增大,影响呈增大趋势。上部结构水平位移随着隧道间距的增大,影响先增大后减小。天津波作用下,上部框架结构为5层、10层时,隧道对上部结构存在放大作用; 15层时,隧道对上部结构存在缩小作用。El-Centro波作用下,上部框架结构为5层、10层时,隧道对上部结构存在缩小作用; 15层时,隧道对上部结构存在放大作用。Considering the influence of subway tunnel on buildings,a three-dimensional finite element model of earthquake responses of seismic response for parallel double tunnels and upper buildings with layered sites was studied.The influence of tunnel depth,the horizontal distance and the structure free vibration frequency were mainly analyzed.The research shows that under the action of Tianjin wave,the influence decreases with the increase of tunnel buried depth;Under the action of El-Centro wave,the influence increases with the increase of tunnel buried depth.When the distance increases,the influence increases first and then decreases.Under the action of Tianjin wave,the existence of the tunnel has amplification effect on the the5-storey and10-storey structure.The existence of the tunnel has a narrowing effect on the15-storey structure.Under the action of El-Centro wave,the existence of the tunnel has amplification effect on the the15-storey structure.The existence of the tunnel has a narrowing effect on the5-storey and10-storey structure.

关 键 词：平行隧道 层状场地 上部结构 地震反应 

分 类 号：TU93[建筑科学—结构工程]