The previous earthquake surveys show that central columns are the weak parts in subway stations during the earthquakes. Reducing the seismic responses of central columns can ensure the safety of stations. Setting friction pendulum bearings (FPB) at the top of central columns may be a good strategy. In this paper, based on a subway station in Shanghai, the FPB is simulated detailly. The isolation effect and mechanism of the FPB is studied with the three-dimensional dynamic time history analysis method. The shearing force and bending moment of the station central columns and the inter-layer displacement of the station during the earthquake are analyzed. The vertical ground motion of different amplitudes is considered. It is found that during the earthquake, the FPB can effectively reduce the maximum shearing force of the central columns and slightly reduce the maximum bending moment. At the same time, it will not cause a significant increase in the inter-layer displacement. The vertical ground motion will reduce the isolation effect of the FPB, and the degree of the reduction increases with the increase of the vertical ground motion acceleration amplitude.

以往的地震调查表明，中心柱是地震时地铁站的薄弱环节。降低中心柱的地震反应可以保证站台的安全。在中心柱的顶部设置摩擦摆轴承 (FPB) 可能是一个很好的策略。本文以上海某地铁站为例，对FPB进行了详细仿真。采用三维动态时程分析方法研究了FPB的隔离效果及机理。分析了地震过程中车站中心柱的剪力和弯矩以及车站的层间位移。考虑了不同幅度的垂直地面运动。据了解，地震期间，FPB可有效降低中心柱的最大剪力，并略微降低最大弯矩。同时，不会造成层间位移的显着增加。垂直地震动会降低FPB的隔震效果，降低程度随着垂直地震动加速度幅值的增大而增大。