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以巨-子结构抗震体系、隔震体系以及智能隔震体系为研究对象,选择4组具有速度脉冲特性的实际地震动加速度记录及人工模拟的具有相同加速度反应谱而无速度脉冲的地震动时程分别作为地震动输入,采用数值分析方法分别计算在有、无速度脉冲的地震动激励下三种结构体系的地震响应,探讨地震动的速度脉冲对巨型结构体系在不同控制策略下地震响应的影响。研究结果表明:三种结构体系在速度脉冲型地震动作用下的地震响应大部分要大于无速度脉冲型的地震响应,近断层地震动的速度脉冲对巨-子结构抗震体系、隔震体系以及智能隔震体系的地震响应均有一定的不利影响。智能隔震体系对速度脉冲地震动较为敏感,但能有效地减小隔震层位移。
Taking giant-substructure seismic isolation system, isolation system and intelligent isolation system as the research object, four groups of real ground motion acceleration records with velocity pulse characteristics and artificial earth motion without acceleration pulse with the same acceleration response spectrum Respectively, as input of ground motion, numerical analysis is used to calculate the seismic responses of three kinds of structural systems under earthquake excitation with and without speed pulse respectively. The effects of ground motion velocity pulse on the seismic responses of giant structural system under different control strategies influences. The results show that the seismic responses of the three structures under velocity-pulse-type ground motions are mostly greater than those of the non-velocity-type pulses. Velocity impulses of near-fault ground motions have a significant influence on the seismic response of giant-substructures, isolation system, Seismic response of smart isolation system has certain adverse effects. The intelligent isolation system is sensitive to velocity pulse ground motion, but it can effectively reduce the displacement of the isolation layer.