高层钢管混凝土框架-RC核心筒结构的弹塑性时程分析  

Elasto-Plastic Time History Analysis on High-Rise Concrete-Filled Steel Tube(CFST)Frame-RC Core Wall Structure

作　　者：尧国皇 于清[2] 郭明 

机构地区：[1]深圳市市政设计研究院有限公司,广东深圳518029 [2]清华大学建设管理系,北京100084

出　　处：《建筑钢结构进展》2014年第2期32-41,57,共11页Progress in Steel Building Structures

基　　金：中国博士后科学基金(20110490417)

摘　　要：基于合理的材料弹塑性(损伤)本构关系模型,建立了某30层钢管混凝土框架-钢筋混凝土核心筒结构振动台试验的有限元分析模型,考虑了结构的几何非线性和材料非线性,包括钢材和混凝土材料的塑性损伤演化。有限元分析结果与试验结果基本吻合。在此基础上,进行了不同地震波强度作用下的弹塑性时程分析,获得了核心筒和楼板的损伤演化过程、框架应力和损伤发展过程、基底剪力时程曲线、楼层位移角包络曲线以及地震作用下整体结构的能量反应规律。结果表明,有限元法能够较为清晰地揭示这类结构体系在地震作用下的弹塑性工作状态,可为同类研究提供参考。In this paper,a finite element analysis（FEA）model is established for simulating shaking table test of a 30-story highrise concrete-filled steel tube（CFST）frame-reinforced concrete（RC）core wall structure,utilizing elasto-plastic damage constitutive model of materials.Geometric nonlinearity and material nonlinearity,including plastic damage evolution of steel and concrete material properties,are considered in the FEA model.A comparison between analysis results and test results indicates predictions from FEA model show a good agreement with shaking table test results. In addition,elasto-plastic time history analysis of the structure under earthquakes of different ground motion levels was carried out.A number of structural response parameters are evaluated,including damage evolution process of core wall and floor slab,evolution of frame stress and damage,base shear time-history curves,inter-story displacement envelope curve and energy response law of the whole structure.The analysis results show that finite element modeling can be used to evaluate the behavior of this type of structural system under earthquake,and the methodology applied in this paper provides a good reference for related research.

关 键 词：本构关系 钢管混凝土框架-RC核心筒结构 塑性损伤演化 时程分析 基底剪力 层间位移 

分 类 号：TU398[建筑科学—结构工程]