多水准地震作用下某隔震框架结构的地震损伤分析  

Seismic damage analysis of an isolated frame structure under multi-level earthquake

作　　者：刘慧鹏 刘付钧 周福霖[1] LIU Hui-peng;LIU Fu-jun;ZHOU Fu-lin(Earthquake Engineering Research&Test Center,Guangzhou University,Guangzhou 510006,China;Beijing Glory PKPM Technology Co.,Ltd.,Beijing 100029,China)

机构地区：[1]广州大学工程抗震研究中心,广东广州510006 [2]北京构力科技有限公司,北京100029

出　　处：《空间结构》2024年第2期87-96,共10页Spatial Structures

摘　　要：隔震结构是近年快速发展的抗震防灾体系.通过弹塑性动力计算,分析隔震结构在地震作用下的破坏机理与损伤分布情况.该工程为多层框架结构,在底部增加隔震层以提高结构的性能水平.采用SAUSAGE软件建立结构的非线性模型,对其进行动力分析,研究结构在多遇地震、设防烈度地震、罕遇地震与极罕遇地震作用下的地震反应和结构损伤过程,并通过傅里叶变换研究结构进入非线性后的频谱特性变化.研究表明,结构性能良好,在罕遇地震作用下结构大部分构件仅为轻微损坏,在极罕遇地震作用下仍未发生倒塌;在各级地震水准作用下隔震支座均为主要耗能构件,且随着地震动的增强耗能增大,上部结构的损伤较小,实现了保护上部结构的设防目标.Isolation structure is a rapid development of earthquake resistant and disaster prevention system in recent years.The failure mechanism and seismic damage distribution of the isolated structure are analyzed by elastoplastic analysis.The project is a multi-storey frame structure,and the performance level of the structure is improved by adding the isolation at the bottom.The nonlinear model of the structure is established and analyzed by the software SAUSAGE and the seismic response and structural damage under frequent earthquake,intermediate earthquake,strong earthquake and super strong earthquake are studied.The spectrum characteristics of the structure after entering nonlinearity is investigated by Fourier transform.The results show that the structure has good performance,its components are slightly damaged under strong earthquake and the structure is not collasped under super strong earthquake.Under the multi-level seismic action.the isolation bearings are main energy dissipation component,and its energy consumption capacity increases with the increase of ground motion.Therefore the damage of superstructure is weekened,and the goal of protecting superstructure is achieved.

关 键 词：隔震结构 地震损伤 动力分析 弹塑性分析 

分 类 号：TU375.4[建筑科学—结构工程] TU352.12