钢框架-混凝土核心筒混合结构滞回耗能比研究  

Ratio of Hysteretic to Input Energy of Steel Frame-Concrete Core Wall Hybrid Structures

作　　者：卜一[1] 吕西林[1] 周颖[1] 黄志华[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2009年第1期55-61,74,共8页Structural Engineers

基　　金：973计划项目(2007CB714202);国家自然科学基金项目(50708071;90815029);上海市晨光计划项目(2007CG27)

摘　　要：结构在地震动作用下的滞回耗能在总输入能中所占的比重称为滞回耗能比,它体现了结构耗散地震动输入能量的能力,是衡量塑性累积损伤的重要指标。文中针对钢框架-混凝土核心筒混合结构的滞回耗能比展开研究,选取一定数量的地震动,对9个具有不同结构特性的高层混合结构进行弹塑性时程分析,得到了混合结构滞回耗能比与结构的最大层间位移角、刚度特征值以及高宽比之间的关系,分析了地震动三要素对滞回耗能比的影响,并归纳了高层混合结构滞回耗能比的变化规律。分析所得结果可以为基于能量的损伤指标研究提供参考,也可以进一步为高层混合结构基于性能的设计方法提供基础。Ratio of hysteretic to input energy （RHIE） can be used to describe the energy dissipation ability of a structure. It is also an important index to measure the plastic accumulative damage of a structure. In this paper, elastio-plastic dynamic analyses of 9 hybrid structures with different structural characteristics were carried out under several sets of ground motions. The relationships of RHIE to maximum story drift, stiffness characteristic value and aspect ratio were established. The influence of ground motions characteristics on RHIE was also investigated. The results are helpful for the study of energy based damage index as well as performance-based seismic design of hybrid structures.

关 键 词：高层混合结构 滞回耗能比 结构特性 地震动特性 

分 类 号：TU973.17[建筑科学—结构工程]