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对目前地下结构横截面地震反应计算中广泛采用的地震系数法、自由场变形法、土-结构相互作用系数法、反应位移法、反应加速度法等多种拟静力方法进行介绍及分析。以大开地铁车站地震反应为例进行数值模拟,通过改变输入地震波、结构刚度、土层刚度以及结构埋深对各种拟静力计算方法的适用性进行了研究,将不同方法的计算结果与动力时程分析方法结果进行了对比。研究结果表明:反应加速度法与动力时程分析方法符合较好,表明该方法在常见地下结构环境条件下具有良好的适用性与计算精度,可以用于地下结构的抗震反应分析。
Quasi-static methods such as seismic coefficient method, free-field deformation method, soil-structure interaction coefficient method, reaction displacement method and reaction acceleration method, which are widely used in seismic response calculation of cross-section of underground structures, are introduced and analyzed. Taking the seismic response of the metro station as an example, the numerical simulation is carried out. The applicability of various quasi-static calculation methods is studied by changing the input seismic wave, structural stiffness, soil stiffness and the depth of the structure. The calculation results of different methods are compared with The results of dynamic time history analysis are compared. The results show that the response acceleration method is in good agreement with the dynamic time history analysis method, which shows that this method has good applicability and accuracy under common subsurface structural conditions and can be used to analyze the seismic response of underground structures.