Stochastic seismic response of structures with added viscoelastic dampers modeled by fractional derivative

作     者：叶昆 李黎 唐家祥 

作者机构：School of Civil EngineeringHuazhong University of Science and TechnologyWuhan 430074China Doctoral Candidate School of Civil EngineeringHuazhong University of Science and TechnologyWuhan 430074China Professor 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2003年第2卷第1期

页      面：133-140页

核心收录：

学科分类：081405[工学-防灾减灾工程及防护工程] 08[工学] 0814[工学-土木工程] 

主　　题：fractional derivative viscoelastic damper stochastic seismic response 

摘      要：Viscoelastic dampers,as spplementary energy dissipation devices,have been used in building structures un- der seismic excitation or wind *** analytical models have been proposed to describe their dynamic force deform- ation *** these analytieal models,the fractional derivative models have attracted more attention as they can capture the frequency dependence of the material stiffness and damping properties observed from tests very *** this paper,a Fourier-transform-based technique is presented to obtain the fractional unit impulse function and the response of structures with added viscoelastic dampers whose foree-detormation relationship is described by a fractional derivative mod- ***,a Duhamel integral-type expression is suggested for the response analysis of a fractional damped dynamie system subjected to deterministic or random *** numerical verification,it is shown that viscoelastic dampers are ef- fective in reducing structural responses over a wide frequency range,and the proposed schmnes can be used to accurately predict the stochastic seismic response of structures with added viscoelastic dampers described by a Kelvin model wills frac- tional derivative.