典型浅埋矩形框架地铁车站地下结构地震易损性分析  

SEISMIC VULNERABILITY ANALYSIS OF UNDERGROUND STRUCTURES OF TYPICAL SHALLOW-BURIED RECTANGULAR FRAME SUBWAY STATIONS

作　　者：蒋家卫 黄文婷 赵凯[1] 陈国兴[1] 杜修力[2] JIANG Jia-wei;HUANG Wen-ting;ZHAO Kai;CHEN Guo-xing;DU Xiu-li(Institute of Geotechnical Engineering,Nanjing Technology University,Nanjing,Jiangsu 211816,China;Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]南京工业大学岩土工程研究所,江苏南京211816 [2]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124

出　　处：《工程力学》2024年第9期9-17,共9页Engineering Mechanics

基　　金：中国博士后科学基金项目(2022M711606);国家自然科学基金面上项目(52378347);国家自然科学基金联合基金项目(U1839201)。

摘　　要：该文旨在研究典型浅埋矩形框架形式地铁车站结构的震后失效概率模型。以9座已建典型矩形框架地铁车站工程实例为研究对象,通过Abaqus/standard有限元软件平台建立了土-结构相互作用三维数值模型。基于地下结构Pushover分析获得的抗震性能曲线,定义了各个车站结构的层间位移角限值。采用IDA方法计算得到了地铁车站结构的概率地震需求模型,并绘制了不同地铁车站结构的地震易损性曲线。通过对比研究发现,地铁车站结构之间的震后失效概率相差巨大,场地平均剪切波速对地下结构地震易损性分析结果起主导作用,尤其是与结构等高分布土层的自由场响应结果,但地下框架结构本身的变形能力也是影响结构震后失效概率的重要因素之一。上述研究成果能够有效加强对现行浅埋地下框架结构抗震性能的认识,可为基于性能的浅埋地铁车站地下框架结构抗震设计提供科学参考。This paper is to study the post-earthquake failure probability model of the typical shallow-buried rectangular frame subway station structure.Nine existing subway stations with rectangular frame section are selected as the study objects,and the three-dimensional numerical model considering soil-structure interaction is established on Abaqus/standard finite element software platform.Based on the seismic performance curve obtained by pushover analysis of the underground structure,the limit of the inter-story drift ratio has been defined for each subway station.The probabilistic seismic demand model of the subway station structure is established based on the result of incremental dynamical analysis,and the seismic vulnerability curves of different subway station structures are plotted.It is found there are huge differences between the post-earthquake failure of different subway stations,and the average shear wave velocity of site plays an important role in the seismic vulnerability analysis of the underground structure,especially the free field response results of the soil layer at the same height as the structure.The deformation capacity of the underground frame structure itself is also one of the important factors affecting the failure probability of the structural post-earthquake failure.The finding could effectively strengthen the understanding of the seismic performance of the current shallow buried underground frame structure,and could provide a scientific reference for the performance-based seismic design of the shallow buried subway station underground frame structure.

关 键 词：地下结构抗震 浅埋地铁车站 矩形框架断面 地震易损性 IDA方法 

分 类 号：TU93[建筑科学—结构工程]