交叉地铁车站地震响应分析

Seismic Response Analysis of Crossing Subway Station

结合某正在规划中的相互穿越地铁车站结构,考虑单个地铁车站和两个交叉地铁车站的情形,分别建立各自的计算模型,计算在该地区人工地震波作用下地铁车站的地震响应,分析交叉地铁车站的地震响应规律以及两交叉地铁车站地震响应的相互影响规律。计算分析表明:该交叉地铁车站满足该地区的抗震要求;浅层地铁车站的相对变形要大于深埋地铁车站;下层地铁车站的相对变形较小,柱端弯矩较小,但由于埋深大,其底板弯矩较大;下层地铁车站的存在为上层地铁车站起到了一定的隔震作用。研究成果可为地下相互穿越工程的抗震设计提供参考。

More and more underground structures crossing each other appeared with the rapid development of rail transport in China.Enough attention should be paid to the seismic performance of the crossing underground structures and the mutual influence between each other.Two crossing subway stations,being planned,are considered in the paper.Several calculation models are established for each case,and the seismic responses are computed and the mutual influences are analyzed.The computation results showed that： the crossing subway stations can satisfy the seismic requirement.The relative deformation of shallow subway station is bigger than that of the deeper one.The moment of bottom slab of the deeper subway station is bigger because of bigger depth,while the moment at column end is smaller because of smaller relative displacement.The existence of deeper subway station has some isolation effect to the shallow one.The research results in the paper can provide some reference for the seismic design of crossing underground structures.