北京地铁车站结构抗震分析

针对我国城市轨道交通快速发展而地铁车站结构地震反应分析相对滞后的现状,以北京地铁14号线为背景,选取4种具有代表意义的车站结构断面形式,考虑结构使用过程中可能出现的各种荷载,采用地震系数法和反应位移法2种抗震计算方法进行专项抗震计算研究,得出在水平地震力作用下矩形和拱形框架结构断面车站的最不利受力位置,应有针对性通过增大构件截面尺寸、提高配筋率等措施加强薄弱部位的抗震设计,切实提高地铁车站结构的整体抗震性能。

Seismic Analysis of Station Structures of Beijing Metro

Focusing on the fact that the seismic response analysis of metro station structure had lagged behind the rapid development of urban rail transit in China,taking Beijing Metro Line 14 as the example, selecting four typical kinds of cross-sections of station structures,considering various loads which would be likely to occur on these structures,this paper carried out special seismic calculation and research respectively by using seismic coefficient method and displacement response method. Therefore,the most critical parts of the station structures with the cross-sections of rectangular or arched frame were ascertained under the action of horizontal earthquake load. It is suggested that the seismic design for the weak parts of the station structure should be enhanced by enlarging structure cross-section size and increasing reinforcement ratio,so as to effectively boost the whole seismic performance of metro station structure.