基于不同计算方法的地铁车站结构抗震性能分析

我国地铁车站结构抗震性能分析仍相对滞后,特别是在各种抗震计算方法分析结果的对比研究方面。针对这种情况,以北京某地铁车站为背景,采用惯性力法、反应位移法及动力时程分析法3种抗震设计方法对地铁车站进行了结构抗震性能分析,得出了水平地震荷载作用下矩形车站结构的柱、板、墙各构件内力分布特征。结果显示:3种计算方法得到的各内力分布规律较为一致,其最大受力部位在底板与柱子交接处,但对于同一个内力而言,内力值有所差别。重点分析了3种抗震设计方法计算结果之间的差异。

Seismic Performance Analysis of Metro Sta-tion Structure Based on Different Calculation Methods

The seismic performance analysis of metro station structure in China is still lagging behind,especially in the aspect of comparative study on seismic calculation results.Taking a metro station in Beijing as the background,3 kinds of seismic design:the inertial force method,response displacement method and dynamic time-history analysis method are adopted to analyze the seismic performance of metro station structure,the internal force distribution of column,plate,wall components of rectangular station structure under the action of horizontal seismic load is obtained.The results show that three internal force distribution calculation methods are consistent,the maximum stress position is on the floor and the post junctions,but for the same internal force,the internal force values are different.At last,differences among the calculation results of three seismic design methods are analyzed.