佛山地铁魁奇路地下换乘站抗震性能分析

以佛山地铁魁奇路站实际工程为背景,对地下车站进行了结构抗震性能分析。以反应位移法建立了地铁车站二维结构计算模型,求解了地下车站受地震荷载作用下响应结果,并与静力法计算结果进行了对比,以研究地铁车站在地震作用下的内力变化规律。基于Midas GTS NX软件,应用非线性时程分析法,建立了结构和周围土层为一体的整体计算模型,通过模态分析求解了结构体系各阶的自振频率和各阶振型;模拟了地下结构在地震荷载下的动态特性,揭示了地铁车站在地震作用下的位移时程反应及结构整体变形状况。

Analysis of the Seismic Performance of the Underground Subway Station in Foshan City

With the actual project of Kuiqi Road Station on Foshan Metro Line 2 as the background, the structural seismic performance of underground subway station is analyzed. A two-dimensional structure model is established by using the response displacement method, the results of seismic response under the action of seismic load are obtained and compared with the calculation of static method, in order to study the variation law of internal force of underground subway station. By using nonlinear time-history analysis method, a whole calculation model is established which includes the structure and the surrounding soil based on Midas GTS NX software, the natural frequency of various vibration modes of the struc-tural system is solved through the modal analysis.The dynam-ic characteristics of underground structure is simulated under the seismic load, the displacement time-history response and the overall deformation of the subway station under earthquake action are revealed.