考虑SSI效应的层间隔震结构地震响应研究  

Study on seismic response of mid-story isolation structure considering SSI

作　　者：房思彤 刘德稳 张亚飞 雷敏[2] Fang Si-tong;Liu De-wen;Zhang Ya-fei;Lei Min(College of Civil Engineering,Southwest Forestry University,Kunming 650000,China;School of Civil Engineering,Tongji University,Shanghai 200091,China)

机构地区：[1]西南林业大学土木工程学院,云南昆明650000 [2]同济大学土木工程学院,上海200091

出　　处：《工程抗震与加固改造》2021年第3期82-88,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金(51808467);云南省博士后基金(2019)。

摘　　要：层间隔震结构是从基础隔震结构发展而来的一种新型隔震体系,近年来成为防灾减灾领域的研究热点之一。本文采用有限元软件ABAQUS建立了层间隔震结构三维整体空间模型,考虑地基土-基础-上部结构的共同作用(SSI),进行地震作用下的非线性动力响应分析。研究了考虑SSI前后的层间隔震结构体系振动特性及动力响应,通过改变基础底部不同土层性质、不同基础埋置深度对比分析,探讨各参数的影响规律。结果表明:不考虑SSI的层间隔震结构基底剪力、各层位移明显大于考虑SSI的情况;基底采用硬土层时的基底剪力、各层位移大于采用软土层时的情况;埋置较深的基础相比埋置较浅基础的基底剪力、各层位移均增大。Mid-story isolation structure is a new type of isolation system developed from base isolation structure,which has become one of the research hotspots in the field of disaster prevention and mitigation in recent years.Based on the finite element software ABAQUS,a three-dimensional overall space model of the mid-story isolation structure is established,and the nonlinear dynamic response of the structure under seismic action is analyzed by considering the SSI of the foundation soil foundation superstructure.The vibration characteristics and dynamic response of the mid-story isolation structure system before and after considering SSI are studied.By changing the properties of different soil layers in the basement and the buried depth of different foundation,the influence of various factors on the mid-story isolation structure considering SSI is discussed.The results show that the base shear and displacement of the mid-story isolation structure without SSI are significantly greater than those of SSI;the base shear and displacement of each layer when the hard soil layer is adopted are greater than those when the soft soil layer is adopted;the period,base shear,vertex displacement and displacement of each layer of the deep foundation are increased compared with those of the shallow foundation.

关 键 词：SSI效应 层间隔震 时程分析 地震响应 

分 类 号：TU352.1[建筑科学—结构工程]