地下连续墙对无柱大跨地铁车站地震反应影响  

Influence of Diaphragm Wall on Seismic Response of Column-Free Large-Span Subway Station

作　　者：许紫刚 李淳宇 夏宗尧 Xu Zigang;Li Chunyu;Xia Zongyao(Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering,East China Jiaotong University,Nanchang 330013,China;State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学江西省岩土工程基础设施安全与控制重点实验室,江西南昌330013 [2]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,江西南昌330013

出　　处：《华东交通大学学报》2023年第4期16-23,共8页Journal of East China Jiaotong University

基　　金：国家自然科学基金青年项目(52108453);江西省自然科学基金青年项目(20212BAB214014);江西省教育厅科学技术研究项目(GJJ200636);江西省交通运输厅科技项目(2021Z0004)。

摘　　要：无柱大跨地铁车站抗震设计是否考虑地下连续墙的影响尚未有统一定论。基于ABAQUS有限元数值分析软件,建立了土-结构静动力耦合有限元模型,分析了水平竖向双向地震作用下,地下连续墙对无柱大跨地铁车站结构动力反应的影响。数值分析表明:地下连续墙会增大无柱大跨地铁车站体系的水平抗侧刚度,考虑地下连续墙时车站侧墙的总体水平相对变形降低;但地下连续墙的存在会放大无柱大跨地铁车站上覆土体的竖向惯性效应,同时也会使得无柱大跨地铁车站内力重分布。考虑地下连续墙时车站底板端部是抗震薄弱环节,抗震设计中应对其进行适当加强。Whether the diaphragm wall should be considered in the seismic design of the column-free large-span subway station has not been uniformly determined.Based on the finite element numerical analysis software ABAQUS,the soil-structure static and dynamic coupling finite element models are established to analyze the influence of diaphragm wall on the seismic response of column-free large-span subway station under horizontal and vertical earthquake load.The results show that the diaphragm wall can improve the lateral stiffness of the column-free large-span subway station system,and the horizontal relative deformation of the side wall is reduced when the diaphragm wall is considered.However,the existence of diaphragm wall will magnify the vertical inertia effect of the overlying soil of the subway station,and also make the internal force of the subway station redistribute.When the diaphragm wall is considered,the end of the bottom slab is a weak seismic link,which should be properly strengthened in the seismic design.

关 键 词：地铁车站 大跨度 无柱 地下连续墙 地震反应 

分 类 号：U216[交通运输工程—道路与铁道工程]