地铁车站抗震分析

首先选取了车站主体结构建立合适的有限元模型,并进行静力分析,然后分别采用了谱分析和动力时程分析两种不同的计算方法对车站进行抗震计算分析,对谱分析计算、谱分析和时程分析的计算结果分别予以对比,得出在水平地震力作用下车站结构的最不利受力位置。主要结论包括:地铁车站结构的弯矩在静力时较小,在地震作用下其增幅较大,动力响应显著。地铁结构需要进行抗震计算,反应位移法、动力时程分析法均能适用于地下建筑结构的抗震分析。在水平地震力作用下,地铁车站结构中柱的地震轴力较大,是主要的承压构件,结构顶板的变形和应力比较大,容易发生破坏。因此在设计和施工过程中,应对上述部位予以足够的重视。

Seismic Analysis of Subway Station

In this paper,the main station structure is selected to establish finite element numerical modeling for static analysis.Then seismic response is analyzed with two different calculating ways,reaction spectral analysis and time-history analysis.Comparing the static calculation result to reaction spectral,reaction spectral to time-history,the author finds the max stressing place of the station structure in horizontal seismic force.The main conclusions of this study could be summarized as follows: The bending moment of structure is small under static action,and increases quickly under seismic action.The station structure must be calculated by seismic analysis.Response displacement method,dynamic time-history analysis method can be applied to seismic analysis of underground construction.The axial pressure of column is big,under seismic action,at the top of structure;the stress and strain are bigger than other points,the top of structure and are very incidental to be destroyed.As a result,in the course of designing and construction,more attention should be paid to them.