围护墙多功能减震结构的地震反应频响分析

围护墙多功能减震结构是一种新型减震结构,具有调频质量减震和阻尼耗能减震等多种耗能减震功能。为了研究此减震结构在地震作用下的响应特性,本文建立了减震结构在地震作用下的动力方程,推导了减震结构地震响应的传递函数、频谱密度,得到主要影响参数对该结构减震效果的影响,并采用模拟地震振动台进行普通框架结构和此结构的对比验证,通过加速度(位移)功率谱密度和加速度(位移)频响幅值反映出各设置工况下的减震规律。结果显示,与普通框架结构相比,该结构的功率谱密度和频响幅值均有不同程度的减小,减震幅度最大可达39.97%,表明该结构体系在地震波作用下具有很好的减震效果,并在参数设置合理的情况下,减震效果更佳。

Study on the Earthquake Response of the Enclosure Wall with Multifunctional Vibration Absorption Structure

The multifunctional vibration absorption enclosure walls is a new type of vibration structure,which has a tuned mass damper and damping energy dissipation of energy dissipation function. In order to study the characteristics of the response under seismic action,a dynamic equation of the vibration structure under seismic action was established and transfer function and spectral density of the earthquake response of the vibration structure was obtained.The main influence parameters on the damping effect was gotten and verified through the simulated earthquake shaking table test between the ordinary frame structure and the vibration structure.The damping rule under different setting was studied through the power spectral density of acceleration（displacement） and the amplitude of the frequency response of acceleration（displacement）.The results show that comparing with the common frame structure,power spectral density and amplitude of the frequency response is decreased and vibration amplitude up to 39.97%.Multi-functional vibration-absorption enclosure walls structure has good damping effect under the action of seismic waves,and the more reasonable of parameter setting,the better damping effect can be obtained.