青岛某地下三层车站结构抗震设计对比分析

Seismic Design Comparison and Analysis of a Three-storey Underground Station in Qingdao

随着我国地下工程的大规模修建以及近年来地震灾害的频繁出现,在地铁结构设计中,抗震计算日益成为设计内容不可或缺的重要组成部分。为研究地震作用对地铁车站结构的影响,以青岛市某明挖三层地铁车站为工程背景,建立车站带外挂双层风道断面计算模型,应用Midas数值模拟软件,采用反应位移法和时程分析法对结构的地震作用进行计算,就地震作用下结构的内力及变形规律进行研究,并对比分析静力作用及地震作用的结果。结果表明:车站结构除个别位置为地震工况控制点外,其余位置地震作用均为非控制因素,地下结构的设计满足运行安全、经济合理的要求;抗震设计的重点是按抗震设防要求加强结构的构造措施。研究分析方法可为类似工程的设计提供参考。

With the large-scale construction of underground structures in China, and the frequent occurrence of earthquake disasters in recent years, seismic design is becoming an important part of underground structure design. For the purpose of studying the earthquake action effect on the subway station, based on the engineering background of a three-storey cut-andcover subway station in Qingdao, the calculation model for cross section of double-deck air duct with external hanging in station was established by Midas numerical simulation software, the earthquake action was calculated by using response displacement method and time history analysis method respectively to study the internal force and deformation of underground station, the results of static analysis and earthquake actions were compared and analyzed. It was concluded that except for some points, the earthquake action was not the control factor, the underground structure design met the requirements of economy, safety and rationality, and the main point of the seismic design was to strengthen structure measures according to the requirements of seismic precaution. It would provide a reference for the similar projects.