复杂结构形式下大跨无柱车站抗震性能分析

Dynamic Response Analysis of Large Column-Free Metro Station Under Complex Structural Form

以济南市轨道交通6号线典型大跨无柱车站为研究对象,研究在地下水位较高、液化土层较厚的不利条件下,车站结构在地震作用下的结构响应。利用Midas GTS等结构计算软件,采用反应位移、时程分析等方法对比大跨无柱段与单柱段的内力分布及变形情况,分析得到车站整体在地震工况下的结构薄弱部位,并有针对性地提出相应的结构补强或构造措施,一定程度上提高了无柱车站的整体抗震能力。

Based on the large span pillarless station of metro line 6 in Ji’nan,this paper analyzes the structural response under earthquake action in the condition of high groundwater level and thickness liquefacient layer.The numerical simulation of large column-free metro station is established by using Midas GTS finite element analysis software.Response displacement method and time history method are used for contrasting structural internal force and displacement between large column-free section and single column section.The weakest point of large column-free station is discovered and the effective measures are proposed in this paper,which improves the seismic capability in a certain extent.