巨型钢框架MR智能减震结构的地震反应分析

Seismic Response Analysis of Vibration-Reduction Steel Mega-Frame Structure with MR Intelligent Dampers

关键词:  巨型钢框架  MR阻尼器  半主动控制

Key words:  steel mega-frame  MR damper  semi-active control

摘要:

采用wilson-Θ法求解巨型钢框架MR智能减震结构运动方程,提出基于最优主动控制算法(LQR算法)的双出杆剪切阀式MR阻尼器的半主动控制算法,并选择普通巨型钢框架结构(主结构3层,次结构3层)和巨型钢框,用LQR算法和半主动控制算法分析最大地震反应及控制效果.结果表明,巨型钢框架MR智能减震结构比普通的巨型钢框架结构优越,MR阻尼器能够有效地减小主结构的地震反应.

Abstract:

The wilson-Θ method is used to solve basic vibration equations of the vibration-reduction steel mega-frame structure with MR intelligent dampers.The semi-active control algorithm of the double pole shear valve mode MR damper is proposed,which is based on the optimal active control algorithm (LQR).The uncontrolled steel mega-frame structure (3 stories in main structure, 3 stories insub-structure) and the vibration-reduction steel mega-frame structure with MR intelligent dampers are analyzed.The LQR algorithm and the semi-active control algorithm are separately employed to compute the maximal seismic responses and the vibration-reduction effect of the vibration-reduction steel mega-frame stucture. The results of simulated computation imply that the vibration-reduction steel mega-frame structure with MR intelligent dampers is much better than the uncontrolled steel mega-frame.The MR dampers can significantly reduce the seismic response of the main structure in the steel mega-frame structure.