附设耗能装置的高层基础隔震建筑抗震性能研究  

Research on seismic performance of high-rise isolated building with energy dissipation device

作　　者：李慧[1,2] 刘迪[2] 杜永峰[1,2] 

机构地区：[1]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050 [2]兰州理工大学防震减灾研究所,甘肃兰州730050

出　　处：《土木工程学报》2010年第S1期276-281,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(50778087);甘肃省科技支撑计划(090-GKCA040)

摘　　要：针对高层基础隔震建筑在地震作用下的动力特性进行分析研究,选择混合隔震控制的设计方案。建立高层基础隔震结构混合隔震控制体系的运动方程,方程中构建上部结构与隔震层之间的非比例阻尼矩阵,并考虑地震作用下结构的非线性。通过对在上部结构附设黏滞性阻尼器的结构模型进行有限元计算,可以看出在地震作用时由于所设黏滞阻尼器与隔震层的协同工作,建筑物的地震响应有明显改善。同时对添加了黏滞阻尼器与叠层橡胶支座相结合的混合控制与单纯基础隔震的减震控制效果加以比较。分析结果表明:这种混合隔震体系可以有效地减小高层基础隔震结构的地震反应,提高其抗震安全性,取得较好的经济和社会效益。Research of dynamic characteristics on high-rise reinforced concrete frame base-isolated structure under seismic action is presented,and related design scheme was suggested.The equation of motion of the hybrid control system is established,and the non-proportionally damping matrix of the upside structure,isolation level and substructure are established for better simulating of damping of the whole system.Nonlinear behavior of structure is considered in formulating the bilinear force-deformation relationship.The finite element model built with the on upside structure was analyzed,through which we can find that the viscous dampers worked coordinately with the base-isolated layer and the stress state of structure was improved obviously under seismic action.In this study,the anti-seismic performance of the structure with nonlinear viscous dampers and laminated rubber bearings were compared with the base-isolated structure only.The results show that the hybrid control scheme is very effective in reducing seismic responses of both superstructure and substructure simultaneously,and the anti-seismic behavior of the whole structure system can be obviously improved.

关 键 词：高层隔震建筑 隔震层 黏滞性阻尼器 

分 类 号：TU352.12[建筑科学—结构工程]