消能子结构对金属耗能减震结构的影响研究  

Influence of energy dissipation substructure on metal energy dissipation structure

作　　者：展语 潘文[1,2] 刘恩雄 李武杰 ZHAN Yu;PAN Wen;LIU Enxiong;LI Wujie(School of Architectural Engineering,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Province Engineering Seismic Research Institute,Kunming 650500,China)

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500 [2]云南省工程抗震研究所,云南昆明650500

出　　处：《四川建筑科学研究》2023年第2期11-18,47,共9页Sichuan Building Science

基　　金：国家重点研发计划(2020YFD1100703-04);云南省教育厅科学研究基金(2021J0062)。

摘　　要：基于金属阻尼器的Maxwell模型,建立了子结构四线型恢复力模型,推导了各阶段的附加阻尼比公式,探讨了子结构与非子结构的初始刚度比、屈服刚度比、屈服位移比和结构延性等对减震结构的影响,并以某框架为例,对推导公式进行了验证。研究结果表明:附加阻尼比随子结构和阻尼器的初始刚度比增加而增加,随屈服刚度比的增加而减小;当结构最大位移为定值时,附加阻尼比随子结构与非子结构的屈服位移比增大而增大,随子结构位移延性系数的增加而减小;在结构最大位移内,子结构越靠后屈服,越有利于阻尼器发挥耗能作用。Based on the Maxwell model of the metal damper,a four-line restoring force model of the substructure was established,and the formula of the additional damping ratio at each stage was deduced.The effect of initial stiffness ratio,yield stiffness ratio,yield displacement ratio and structural ductility of substructure and non-substructure on the seismic reduction sturturture were discussed,and a framework model was developed to validate the derived formulas.The results show that the additional damping ratio increases with the initial stiffness ratio of the substructure and damper and decreases with the yield stiffness ratio.When the maximum displacement of the structure is a fixed value,the additional damping ratio increases with the increase of the yield displacement ratio of the substructure and the non-substructure,and decreases with the increase of the displacement ductility coefficient of the substructure.Within the maximum displacement of the structure,the further the substructure yields,the more conducive the damper is to play an energy dissipation role.

关 键 词：子结构 金属阻尼器 恢复力模型 附加阻尼比 PUSHOVER分析 

分 类 号：TU375.4[建筑科学—结构工程]