地铁车站抗震性能三维时程分析

3D TIME-HISTORY ANALYSIS ON SEISMIC BEHAVIOR OF A SUBWAY STATION

为了分析杭州某地铁车站的抗震性能,采用时程分析法进行研究。利用MIDAS GTS NX有限元分析软件建立三维模型,输入地震波,计算得出结构的位移、应力。结果表明E2地震作用下,顶底板位移差最大值可达7.603mm;结构最大应力为5.81MPa,满足混凝土受压要求。最大应力主要出现在拐角处,应在这些部位采取相应的抗震构造措施,保证车站结构的抗震设防目标。E3地震作用下,顶底板位移差最大为13.700mm,相应层间位移角为1/1026<1/250,满足结构变形要求。

Seismic behavior of a subway station in Hangzhou is researched by using time-history analysis method.MIDAS GTS NX is used and seismic waves are input to get the displacement and stress.It turns out the upper and lower horizontal displacement difference peak can be 7.603mm,and the maximum stress is 5.81MPa under E2 earthquake,fulfilling the requirements of concrete compression.The maximum stress mainly occurs at the corner.Constructional measures for earthquake resistance should be taken to ensure the seismic fortification target of station structure.Under E3 earthquake,the upper and lower horizontal displacement difference peak can be 13.700mm,corresponding interlayer displacement angle is 1/1026 less than 1/250,fulfilling structural deformation requirements.