多层钢筋混凝土框架结构“加层减震”能量时程分析  

A Time-energy History Analysis on an Adding-storey Structure of Multi-storey RC Frame Using Light Steel Structure as a TMD System

作　　者：高剑平[1] 刘礼君 王斌 李明[1] 

机构地区：[1]华东交通大学土木建筑学院,江西南昌330013 [2]海南元正建筑设计咨询有限公司责任公司江西分公司,江西南昌330013 [3]南昌市建设工程质量监督站,江西南昌330013

出　　处：《华东交通大学学报》2008年第5期16-20,共5页Journal of East China Jiaotong University

基　　金：江西省教育厅科学技术研究项目([2006]305)

摘　　要：结合一幢多层框架结构应用铅芯叠层橡胶支座(LRB)进行加层改造的工程实例,在对隔震层的抗侧刚度和阻尼比基于能量准则进行优化的基础上,利用Matlab语言编制了能量时程分析程序,考虑地震动三要素和铅芯隔震支座动力特性(屈服位移和第二刚度系数)等影响因素,分析典型地震动作用下设置上述隔震元件LRB加层结构的能量输入、转化及耗散特性.分析结果表明,输入到结构的总能量较加层前有不同程度的增加,但是大部分都由隔震层来吸收和耗散,使得输入到原主体结构的能量较加层前大大降低,减震效果较为明显,证明提出的基于能量的优化准则的合理性与有效性.A program is developed with MATLAB language to conduct time-energy history analysis, according to the optimization results of lateral rigidness and damping ratio of isolation layer based on the energy criterion proposed by the authors, combining with an adding-storey project of a multi-storey RC frame structure using lead laminated rubber bearings （LRB）. The characteristics of energy input, energy conversion and energy dissipation are analyzed under some typical earthquake ground motions considering the three essential elements of ground motion and the dynamic characteristics of LRB. The results show that, the total energy input into the structure increases at different degree compared to that of previous adding-storey, but most of the input energy is dissipated by the isolation layer, so the energy dissipated by the original structure reduces remarkably compared to that of previous adding-storey. The obvious effect of seismic reduction proves the feasibility and rationality of energy-based optimization criterion.

关 键 词：铅芯叠层隔震支座 框架结构 加层 减震 能量 

分 类 号：TU385[建筑科学—结构工程]