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基于国际通用Benchmark隔震模型,提出了一种基于磁流变阻尼器的负刚度智能隔震控制策略及其一组有效控制参数.采用Matlab模拟分析了双向地震作用下普通隔震、H2/LQG主动控制、H2/LQG-clipped半主动控制、Passive-on被动控制和拟负刚度控制时模型的地震反应,对比分析了250条不同场地地震波下五种控制方式的控制效果和适应性.结果表明:拟负刚度智能隔震集合了主动和传统半主动控制的优点,其综合控制性能最优,能同时有效降低大地震时隔震层位移和中小地震时上部结构地震反应.研究了不同断层距的近场地震下不同控制方式隔震结构地震反应,得出了近场影响系数.
Based on the internationally accepted benchmark Benchmark isolation model, a negative stiffness intelligent isolation control strategy based on magnetorheological damper and a set of effective control parameters are proposed. The simulation results of general isolation, H2 / LQG Active control, H2 / LQG-clipped semi-active control, Passive-on passive control and quasi-negative stiffness control, the control effects and adaptability of five control modes under 250 different sites were compared and analyzed.The results show that : Quasi-negative stiffness intelligent vibration isolation integrates the advantages of active and traditional semi-active control and has the best overall control performance, which can effectively reduce the seismic isolation during large earthquakes and the seismic response of superstructures during medium- and small-scale earthquakes. Near-field earthquake under different control methods of seismic isolation seismic response, obtained the near-field impact coefficient.