基于虚拟激励的滞变支撑连接耦合结构的非一致平稳随机地震响应分析

Stationary Stochastic Seismic Response Analysis of Coupled Structures Interconnected by Hysteretic Dampers Subjected to Non-uniform Random Seismic Excitations with Pseudo Excitation Principle

为了得到滞变支撑连接耦合结构的非一致随机地震响应,以虚拟激励法为基础,导出系统基于多点多分量随机地震的虚拟激励与响应分析式。该方法的未知量为绝对位移,可适用于包括非一致地震在内的所有地震激励形式。数值研究表明,本文方法与基于动态相对位移的虚拟激励法和蒙特卡罗法的结果具有很好的一致性。在此基础上,开展了滞变支撑屈服力与屈服位移的参数化研究。

To calculate the stationary stochastic seismic response of coupled structures interconnected by hysteretic dampers subjected to non-uniform random seismic excitations,a pseudo excitation method based on the multi-support and multi-component was proposed.As the unknown quantity is not the dynamic relative displacement but the absolute displacement,the proposed method can be suitable for all the seismic excitation including uniform seismic excitation.Numerical research shows that：results from the proposed method,traditional pseudo excitation method based on the dynamic relative displacement and the Monte-Carlo numerical simulation method agree well,verifying the reasonableness of the proposed method.Further,parametric study of hysteretic damper about the yielding force and the yielding displacement is also developed.