基础隔震加AMD混合控制结构的抗震分析

考虑基底隔震、首层施控的混合控制结构的抗震性能，采用Ｙ．Ｋ．Ｗｅｎ建议的滞回模型描述隔震装置的弹塑性特性，利用等效线性化方法形式上把结构振动方程简化为线性扩展状态方程。对平稳和非平稳过滤高斯白噪声激励进行了随机分析，并针对一个六层框架结构进行了数值计算，详尽地分析了基底隔震装置和调频质量阻尼器的参数对混合控制结构反应的影响，在此基础上对这种混合控制结构的抗震性能作出了评价。

SEISMIC RESPONSE ANALYSIS OF BASE-ISOLATED STRUCTURS WITH ACTIVE TUNED MASS DAMPERS

In this paper random behavior of a base--isolated structure with an Active Tuned Mass Damper (AMD) on the first floor is considered.Hysteretic model proposed by Y.K. Wen is exploited to establish dynamic equatons of the structure. Those equations are formally simplified to linear extented state equations by using the linear equivalent technique. Random analyses are developed to evaluate the aseismic performance of a six--storey isolated frame structure with an AMD on the first floor for filtered Gaussian white noise excitation. Influence of parameters of the isolator and the AMD on the seismic response is summarized with extensive numerical results. It is shown that hybrid control has a promising prospect in practical application of aseismic structures.