考虑围护结构的地下车站反应加速度法抗震设计

Seismic Design of Subway Underground Station Considering Retaining Structure Based on Response Acceleration Method

反应加速度法作为一种拟静力抗震分析方法,由于其可以考虑复杂结构形式等,因此在工程中具有很强的实用性。在介绍反应加速度法基本原理和计算流程的基础上,结合轨道交通地下车站工程实例,考虑车站围护结构的存在,借助一维土层地震反应分析,获得结构顶、底板相对水平位移为最大值时刻的各土层和结构对应埋深处的水平有效反应加速度,将其作为反应加速度法的等效荷载进行抗震计算。通过阐述具体计算过程,分析计算结果,为地下结构抗震设计提供指导。

Response acceleration method,as a pseudo-static seismic analysis method,has a wide application for it can be used for complex structure in engineering.The basic principle and calculation process of response acceleration method are systematically introduced in the paper.A project case of subway station considering retaining structure is given.By one-dimensional soil layer seismic response analysis,horizontal effective response acceleration of soil and structure corresponding to the same depth is acquired when the maximum relative horizontal displacement is achieved at the top and bottom of structure.It can be used as the equivalent dynamic load in seismic calculation based on response acceleration method.The calculation process is described and the results are analyzed in detail,providing guidance for the seismic design of underground structure.