非连续纵向结构体系单柱地铁车站横向地震响应分析  

Transverse seismic response analysis on single column underground station with discontinuous longitudinal structure system

作　　者：郭朝 Guo Chao(不详)

机构地区：[1]中国铁路设计集团有限公司,天津300142

出　　处：《现代城市轨道交通》2021年第1期80-86,共7页Modern Urban Transit

摘　　要：依托某地下双层单柱车站,考虑中板孔洞、中板纵梁局部中断的结构特征,建立非连续纵向结构体系的三维计算分析模型,采用三维反应位移法和非线性时程分析法,分别就E2、E3地震作用下结构体系的横向地震响应进行分析,得到分析结论:在E2、E3地震作用下,非连续纵向结构体系横向抗震性能满足规范要求;中板孔洞区段、非连续中板纵梁区段是结构体系横向抗震能力的薄弱部位,非连续中板纵梁区段中柱的横向内力和结构体系的横向变形最大,中板孔洞区段中板纵梁的横向内力最大;中柱、临近孔洞的中板纵梁承受了较大的横向弯矩、横向剪力,易发生弯剪破坏。Based on an underground double-level and single column station,taking into consideration of the structural characteristics of medium floor hole and partial disconnection of medium floor longitudinal beam,a three-dimensional calculation and analysis model of discontinuous longitudinal structural system is established.This paper uses a three-dimensional response displacement method and nonlinear time history analysis method to analyze the lateral seismic response of structural system under E2 and E3 earthquake forces respectively,and the analysis conclusion shows that the lateral seismic response of structural system meets the requirements as specified.The transverse seismic performance of the discontinuous longitudinal structure system meets the requirements of the code,the hole section of the middle floor and the discontinuous longitudinal section of the middle floor are the weak parts of the transverse seismic capacity of the structure system,the transverse internal force of the middle column and the transverse deformation of the structure system are the largest in the discontinuous longitudinal section of the middle floor,and the transverse internal force of the longitudinal section of the middle fl oor of the hole section is the largest,the transverse internal force of the middle column and the adjacent hole is the largest.The longitudinal beam of medium floor bears large transverse bending moment and shear force,and bending shear failure is prone to occur.

关 键 词：地铁 单柱车站 非连续结构 地震响应 

分 类 号：U231.4[交通运输工程—道路与铁道工程]