基础隔震多层钢框架结构地震反应分析  

Seismic Response Analysis of Base Isolated Multi-layer Steel Frame Structure

作　　者：唐克东[1] 郭祥程 范程程[1] 

机构地区：[1]华北水利水电大学,河南郑州450011

出　　处：《工程抗震与加固改造》2017年第3期91-98,共8页Earthquake Resistant Engineering and Retrofitting

摘　　要：基于有限元理论和动力学原理,采用大型有限元分析软件SAP2000建立多层钢框架房屋的非隔震和基础隔震结构三维有限元模型,并运用动力时程分析法对两种模型进行X、Y、Z三个方向的地震动力反应分析。分析结果表明:基础隔震后多层钢框架结构的水平地震反应明显低于非隔震结构。其上部结构的自振周期显著延长,层间剪力大大减小,层间相对位移和楼层加速度远小于非隔震结构,上部结构基本呈现整体平动状态。但基础隔震结构的竖向加速度反应有可能增大,设计中应引起注意。Based on the finite element and dynamic theory, the three-dimensional finite element models of non-isolated and base- isolated structure of a multi-layer steel frame house are established by SAP2000 software, and the seismic dynamic response analysis in the direction of X, Y and Z of these two models is carried on by dynamic time-history analysis method. The results show that the upper structure＇ s horizontal earthquake responses of base-isolated structure are significantly lower than those of the non-isolated structure. The natural vibration period of the upper structure is remarkably prolonged, and interlayer shear force decreases greatly, the relative storey displacement and storey acceleration are far less than that of the non-isolated structure, and the upper structure presents the state of the overall translation. However, the vertical acceleration response of the base-isolated structure may increase, which should be pay more attention indesign.

关 键 词：有限元法 多层钢框架结构 基础隔震 动力时程分析 地震反应 

分 类 号：TU352.12[建筑科学—结构工程]