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针对北京中国妇女活动中心酒店这一高烈度区特别不规则结构,研究了高层不规则结构减震理论,提出了采用软钢阻尼器和粘滞阻尼器两种消能减震装置,对该结构在无控和有控制后在地震作用下的动力响应和控制效果进行研究。文中,通过建立结构的力学模型,首先分析了结构的动力特性;然后,分别从能量、变形和力三个方面对比了无控结构及安装了软钢阻尼器和粘滞阻尼器的结构在多遇地震以及罕遇地震作用下的动力响应。结果表明:在较宽的地震波频带内,两种阻尼器对于控制这一不规则结构的扭转效应,提高该结构的整体抗震性能均有较好的减震效果。相对粘滞流体阻尼器而言,软钢阻尼器控制结构水平加速度效果较好;而粘滞流体阻尼器在控制结构水平位移性能稍好。
In view of the special irregular structure of Beijing China Women’s Activity Center Hotel in high intensity area, the theory of high-level irregular structure damping was studied and two kinds of energy-dissipating vibration-damping devices using mild steel damper and viscous damper were proposed. The dynamic response and control effect under uncontrolled and controlled earthquakes are studied. In this paper, the dynamic characteristics of the structure are first analyzed through the establishment of the mechanics model of the structure. Then the structure of the uncontrolled structure and the installation of the mild steel dampers and the viscous dampers are contrasted in terms of energy, deformation and force respectively Dynamic response to earthquakes and rare earthquakes. The results show that the two kinds of dampers have a better damping effect for controlling the torsional effect of the irregular structure and improving the overall seismic performance of the structure in a wider seismic frequency band. Relatively viscous fluid damper, the mild steel damper control structure horizontal acceleration better; and viscous fluid damper in the control structure horizontal displacement slightly better performance.