摩擦摆基础隔震结构双向地震反应分析

采用双向耦合力学模型模拟摩擦摆支座的双向耦合效应，对摩擦摆基础隔震结构进行了单向和双向地震反应对比分忻，分析表明在双向地震作用下结构各层的加速度反应较小，隔震层的层间位移较大，而上部结构的层间位移较小，并且在双向地震作用下，支座的最大位移明显大于单向地震作用时的支座最大位移，因而应考虑双向地震作用对摩擦摆基础隔震结构地震反应和隔震支座性能的影响。

Analysis of seismic response of base-isolated structures with friction pendulum system under bilateral ground motions

The bilateral coupled mechanical model is used to simulate the bilateral coupled effect of the friction pendulum system. The comparing analysis on unilateral and bilateral seismic response of the base-isolated structures with the friction pendulum system is carried out. It is found that under the bilateral ground motions the accelerations of each floor are smaller, the story displacement of isolation layer is larger, the story displacements of super-structure are smaller, and the maximum displacement of the bearings under bilateral components is much lager than that under unilateral component. So the influence of the bilateral ground motions on the seismic response of the base-isolated structures and the performance of bearings should be considered.