明挖隧道预制结构三维地震响应分析  

Three-dimensional Seismic Response Analysis of Precast Structure of Open Excavation Tunnel

作　　者：薛源 张银屏 刘涛 袁勇[4] XUE Yuan;ZHANG Yinping;LIU Tao;YUAN Yong(Shanghai Shentong Metro Group Co.,Ltd.,Shanghai 201103,China;Shanghai Urban Construction Design&Research Institute(Group)Co.,Ltd.,Shanghai 200123,China;Shanghai Huangpu River Crossing Facility Investment Construction Development Co.,Ltd.,Shanghai 200335,China;State Key Laboratory of Disaster Reduction of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]上海申通地铁集团有限公司,上海201103 [2]上海市城市建设设计研究总院(集团)有限公司,上海200123 [3]上海黄浦江越江设施投资建设发展有限公司,上海200335 [4]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《建筑施工》2022年第5期1089-1092,共4页Building Construction

基　　金：上海市科学技术委员会科研计划项目(17DZ1203402)。

摘　　要：结合实际工程采用的预制构件拼装箱涵结构,研究运用三维有限元数值模拟,考察其横断面错缝以及拼装箱涵沿隧道纵向分布的节段间接缝对地震响应的影响。建立包括地基土和明挖隧道的分析模型,采用设防上海人工地震动输入,计算得到隧道结构构件和接缝在地震作用下的内力和变形响应。结果表明:地震动力作用对结构内力影响最大的位置位于隧道侧墙上部;横向地震作用引起结构的内力和层间位移响应比纵向地震作用更为显著。同时,箱涵节段的低拼纵缝以及节段间接缝张开量随动力作用发生波动,节段高拼纵缝在动力作用过程中未发生张开。Combined with the prefabricated component assembled box culvert structure used in the actual project,the three-dimensional finite element numerical simulation is used to investigate the influence of the cross-sectional staggered joints and the joints between segments of the assembled box culvert along the longitudinal distribution of the tunnel on the seismic response.The analysis model including foundation soil and open excavation tunnel is established,and the internal force and deformation response of tunnel structural members and joints under earthquake are calculated by using the fortified Shanghai artificial ground motion input.The results show that the position where the seismic dynamic action has the greatest influence on the internal force of the structure is located on the upper part of the tunnel side wall.The response of internal force and inter story displacement caused by transverse seismic action is more significant than that caused by longitudinal seismic action.At the same time,the separation of low spliced longitudinal joints and joints between sections of box culvert fluctuates with the dynamic action,and the high spliced longitudinal joints of sections do not separate during the dynamic action.

关 键 词：明挖隧道 箱涵 预制混凝土结构 抗震性能 三维数值模拟 

分 类 号：TU99[建筑科学—市政工程]