地铁车站中板异形大开孔受力分析  

The Mechanical Analysis of Special-Shaped Openings in Middle Plate of Metro Station

作　　者：王颖[1] WANG Ying(China Railway Eryuan Engineering Group Co.Ltd.,Chengdu 6l0031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《工程建设与设计》2023年第15期3-7,共5页Construction & Design for Engineering

摘　　要：以成都某条地铁线路双跨及3跨车站两种公共区中板异形大开孔为背景,采用三维有限元模型对不同型式异形孔的结构布置、受力变形及地震响应等进行分析,确定地下结构空间效应以及抗震薄弱部位。分析结果表明:针对公共区异形大开孔,可采用变截面横梁或结合垂直电梯井壁设置混凝土墙体改善中板受力,较传统横梁设置车站使用功能更优;大范围、不规则的公共区开孔造成局部中板纵梁不连续对整体结构在地震作用下的影响不大,但是削弱了结构体系的横向抗震能力,引起结构板在地震作用下位移加大,是结构体系的薄弱环节。Based on the background of two public areas of double-span and three-span station of a metro line in Chengdu,this paper uses three-dimensional finite element model to analyze the structural arrangement,stress deformation and seismic response of different types of special-shaped holes,and to determine the space effect of underground structure and seismic weak points.The analysis results show that for large special-shaped openings in public areas,variable cross-section beam or concrete wall combined with vertical elevator shaft wall can be used to improve the stress of mid-plate,which is better than traditional cross-beam station.Large-scale and irregular open holes in public areas cause discontinuity of local mid-plate longitudinal beam,which has little effect on the overall structure under earthquake action.However,it weakens the lateral seismic capacity of the structural system and causes an increase in the displacement of the structural slab under seismic motion,which is the weak link of the structural system.

关 键 词：地铁车站 中板异形开孔 数值分析 地震作用 

分 类 号：U231.4[交通运输工程—道路与铁道工程] TU22[建筑科学—建筑设计及理论]