黏滞阻尼器控制偏心结构扭转耦联振动效果分析

为了有效控制地震作用下偏心结构扭转耦联振动所引起的灾变问题,在理论分析和数值计算的基础上,建立了地震作用下偏心结构的扭转耦联运动方程,通过研究黏滞阻尼器对偏心结构扭转耦联振动的控制效果,对比分析4种黏滞阻尼器常用布置方案下偏心结构的地震响应,量化了黏滞阻尼器和钢支撑共同保护作用下对偏心结构减震效果的影响。研究结果表明:设置有黏滞阻尼器的偏心结构,在双向地震作用下偏心结构最大层位移和层间位移角均得到有效的控制;在多遇地震作用下黏滞阻尼器人字型布置方式对控制偏心结构扭转效果明显,罕遇地震作用下不同布置方式的控制效果相差不大,其结果可为地震作用下类似的偏心结构扭转效应的振动控制提供借鉴参考。

THE VIBRATION CONTROL EFFECT ANALYSIS OF TORSION COUPLING RESPONSE OF ECCENTRIC STRUCTURES WITH THE VISCOUS DAMPERS

In order to control the catastrophe problem of eccentric structure caused by the coupling vibration of torsion under the action of the earthquake effectively,based on the theory analysis and numerical calculation,the motion equation of the coupling vibration of torsion under the action of the earthquake was built,through investigating the control effect of viscous damper for eccentric structure torsion coupling vibration,it was made a comparative analysis of seismic response of the eccentric structure with viscous dampers arranged by four schemes,and also quantified the influence of the combined protection of the viscous damper and steel support on the damping effect of the eccentric structure.The results of the study show that the maximum displacement and the displacement angle of layers of the eccentric structure with the viscous damper can be controlled effectively under the double action of earthquake;the torsion can be controlled effectively with the herringbone arrangement of viscous damper under the action of multiple earthquake,the control effect of different arrangement is basically the same under the action of rare earthquake,the results can provide reference for the vibration control of torsional effect of similar eccentric structures under the action of earthquake.