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近断层脉冲型地震动的大幅值、长周期速度与位移脉冲会使基础隔震结构的隔震层产生过大变形,导致隔震支座侧向失稳,隔震结构体系破坏。提出隔震层组合限位器软限位保护方案。设计实验模型,输入近断层脉冲型地震动,应用软件SAP2000对36种软限位工况进行分析,结果表明限位效果良好。给出了组合限位器参数对隔震层与上部结构动力响应的影响规律。
The large amplitude, long-period velocity and displacement pulse of near-fault impulsive ground motions will cause excessive deformation of the basement isolation structure, resulting in the lateral instability of the isolation bearings and the failure of the isolation structure system. The software limit protection scheme of the isolation layer combination limiter is proposed. The experimental model is designed and the near-fault impulsive ground motion is input. The application software SAP2000 analyzes 36 kinds of software limit conditions, and the results show that the limit effect is good. The influence of the combination limiter parameters on the dynamic response of the isolation structure and the superstructure is given.