地震作用下相邻隔震结构的复合被动控制

Composite passive control under earthquake of adjacent isolated structures

在相邻隔震结构等效双体单自由度简化模型间设立Kelvin-Voigt型被动控制单元,基于Kanai-Tajimi谱随机地震动模型,以结构振动总能量最小为优化控制目标,分析得到连接控制参数对控制效果的影响规律及最优控制参数,并基于等效双体单自由度模型计算得到相邻高层隔震结构间连接控制最优参数,分别从时域和频域角度推导得到了相邻高层隔震结构控制的随机响应表达式,分析了连接控制装置在不同布置方案下,对结构自振特性和随机响应的影响,并通过数值分析证明了该控制方法的控制效果,表明该控制方法应用于相邻隔震结构间的有效性。

A Kelvin-Voigt type passive control unit was set up between the equivalent two-body single-degree-of-freedom simplified models of adjacent isolated structures.Based on the Kanai-Tajimi spectral stochastic seismic motion model,by taking the minimum of the total vibration energy of the structures as the optimal control objective,the influence rules of the connection control parameters on the control effect have been drawn on basis of detailed analyses,as well as the optimal control parameters.According to the equivalent two-body single-degree-of-freedom model,the optimal parameters of connection control between adjacent high-rise isolated structures were obtained;The response expressions of adjacent high-rise isolated structures were derived from the time domain and frequency domain;The influences of connection control devices on the natural vibration characteristics and random responses of the structures under different layout schemes were analyzed.Finally,it is proved by numerical analysis that,this control method can be applied to adjacent isolated structures,which has control effect on each structure.It shows that the control method is effective for the adjacent isolated structures.