高层剪力墙复合基础隔震结构地震响应分析  

SEISMIC RESPONSE ANALYSIS OF COMPOSITE BASE-ISOLATED TALL SHEAR WALL BUILDINGS

作　　者：刘彦辉[1,2] 杜永峰[3] 周福霖[1,2] 谭平[1] 闫维明[2] 

机构地区：[1]广州大学减震控制与结构安全国家重点实验室(培育),广州510405 [2]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124 [3]西部土木工程防灾减灾教育部工程研究中心,兰州730050

出　　处：《工程力学》2011年第7期143-150,共8页Engineering Mechanics

基　　金：国家自然科学基金重大研究计划项目(90815027);国家自然科学基金项目(51008009);中国博士后基金项目(20100480175)

摘　　要：针对高层剪力墙结构基础隔震问题,研制出双向抗拔滑动装置,与叠层橡胶隔震支座共同使用形成复合隔震系统。通过建立高层剪力墙复合基础隔震结构动力分析简化模型,推导出高层剪力墙复合基础隔震结构的频率方程、振型正交条件、广义质量与广义刚度。根据Hamilton原理,推导出橡胶隔震支座阻尼在各振型上的等效阻尼比,从而实现该体系运动方程的解耦,通过振型叠加法进行高层剪力墙复合基础隔震结构地震响应的求解。通过对一16层的剪力墙复合基础隔震结构应用该文动力分析模型及地震响应求解算法进行地震响应分析,该复合隔震体系能够有效的减小上部结构的地震响应,且设计的抗拔滑动装置能够有效的抵抗倾覆力矩在隔震层产生的拉力,同时该文建立的动力分析模型及地震响应求解算法与有限元数值积分法基本一致,说明对高层剪力墙复合基础隔震结构建立的动力分析模型及地震响应求解算法是正确的。In base-isolated tall shear wall buildings,the bidirectional anti-pulling sliding device is used to resist tension and bear pressure.In this paper,it was developed and used together with the laminated rubber bearing to form a composite base-isolation system.Based on the established dynamic mechanical model of this base-isolated system,the frequency equation,mode orthogonal conditions,generalized mass and stiffness were deduced.According to the Hamilton principle,the equivalent damping ratio in each mode produced by the damping of laminated rubber bearings was derived.Therefore,the seismic response of base-isolated tall shear wall buildings can be solved by the modal superposition method.The seismic response of a sixteen-story base-isolated shear wall building was obtained by establishing a dynamic model and carrying out analysis against that model,demonstrating that this composite isolated system has an obvious function of shock absorption,thus the bidirectional anti-pulling sliding device can resist tension produced by over-turning moment.In addition,the seismic response obtained through the established dynamic model in this paper was basically consistent with that by numerical integration solution of FEM,showing the correctness of the established dynamic model and the solving method.

关 键 词：抗拔滑动装置 基础隔震 地震响应求解 非比例阻尼 高层剪力墙结构 

分 类 号：TU398.2[建筑科学—结构工程]