超高层错层隔震体系地震响应研究

超高层错层隔震体系是层间隔震体系基础上发展而来的一种隔震结构。建立了某超高层错层隔震结构有限元模型，分别输入普通地震动、远场类谐和长周期地震动和近断层脉冲型长周期地震动3种不同类型的地震动，分析错层隔震结构在3种地震动作用下的响应，并与层间隔震结构响应进行分区比较。结果表明：错层隔震结构和层间隔震结构在3类地震动作用下层间位移较小，基底剪力较小，塑性铰少，两种结构均具有良好的减震效果；在普通地震动作用下，错层隔震结构相比于层间隔震结构层间位移减小、基底剪力减小，其减震性能较层间隔震结构更优；错层隔震结构在不同长周期地震动作用下减震效果具有一定差异性，在近断层脉冲型地震动作用下的减震效果稍优于层间隔震结构的，在远场类谐和长周期地震动作用下的减震效果稍劣于层间隔震结构的。在受远场类谐和长周期地震动影响的区域，错层隔震结构在设计时需对中部隔震层附近的核心筒予以充分关注。

Study on seismic response of super high-rise staggered story isolation system

The super high-rise staggered story isolation system is an isolation structure developed from the mid-story isolation system. The finite element model of a super high-rise staggered story isolation structure was established, and three kinds of ground motion of ordinary ground motion, far-field harmonic-alike ground motion and near fault pulse ground motion were input, the seismic response of the staggered story isolation structure under three kinds of ground motion were analyzed and compared with those of the mid-story isolation structure. The results show that the staggered story isolation structure and the mid-story isolation structure have smaller displacement, smaller base shear and less plastic hinges under three kinds of ground motion, and both of them have good damping performance. Compared with the mid-story isolation structure, the inter-story displacement and the base shear of the layered isolation structure are smaller than those of mid-story isolation structure under the ordinary ground motion, and its damping performance is better than that of the mid-story isolation structure. The shock-absorbing performance of the staggered story isolation structure is different under different long period ground motions. The shock-absorbing performance of the staggered story isolation structure is slightly better than that of the mid-story isolation structure under near fault pulse ground motion, while the shock-absorbing performance of the staggered story isolation structure is slightly worse than that of the mid-story isolation structure under far-field harmonic-alike ground motion. The staggered story isolation structure should be paid attention to the design of the core tube near in the area affected under far-field harmonic-alike ground motion.