脉冲型地震非线性粘滞阻尼隔震结构分析
摘要
选用实际的近断层脉冲型地震记录作为输入,研究了非线性粘滞阻尼对铅芯橡胶隔震结构的减震效果。分析表明,非线性粘滞阻尼对于减小隔震层位移始终是有利的,但是过大的阻尼参数会导致上部结构的加速度反应大幅增加;当广义阻尼系数不超过某一阈值时,速度指数的变化对上部结构影响很小,但较小的速度指数更利于控制隔震层大幅位移。
引文
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[2]杨迪雄,李刚,程耿东.近断层脉冲型地震动作用下隔震结构地震反应分析[J].地震工程与工程振动,2005,25(2).
[3]Makris N,Chang S P.Effect of viscous,viscoplastic and frictiondamping on the response of seismic isolated structures[J].Earth-quake Engineering and Structural Dynamics,2000,29(1):85.
[4]Jangid R S,Kelly J M.Base isolation for near-fault motions[J].Earthquake Engineering and Structural Dynamics,2001,30(5).
[5]Provisakis C P.Effect of LRB isolators and supplemental viscousdampers on seismic isolated buildings under near-fault excita-tions[J].Engineering Structures,2008,30(5):1187-1198.
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