钢-混凝土组合核心筒的变形性能指标限值研究  

Research on deformation performance index limits of steel-concrete composite core tube

作　　者：汪梦甫[1] 罗丹[1] 胡张齐[1] WANG Mengfu;LUO Dan;HU Zhangqi(College of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《建筑结构学报》2020年第3期81-92,共12页Journal of Building Structures

基　　金：国家自然科学基金项目(51278181).

摘　　要：以国内28个核心筒的拟静力试验数据为基础,按骨架曲线和破坏现象两种性能状态划分方法得到了核心筒的变形性能指标,并将两种方法所得到的结果进行对比,验证了基于骨架曲线划分性能状态方法的合理性。基于OpenSees软件平台并通过与试验结果对比验证,建立了核心筒的有限元模型并据此进行参数分析,得到了各性能状态的位移角限值,分析了轴压比、高宽比、连梁跨高比、钢板暗支撑含钢率、暗柱含钢率和角部含钢率对钢-混凝土组合核心筒在不同性能状态下位移角的影响。研究结果表明:轴压比与连梁跨高比对变形性能指标限值影响明显,增大钢板暗支撑含钢率能提高变形能力,高宽比和暗柱、角部含钢率对各性能等级的变形指标限值影响较小。对有限元分析结果进行统计分析,得到了钢-混凝土组合核心筒在各性能等级的变形指标限值,可为抗震性能设计提供参考。Based on the quasi-static test results of 28 core wall specimens,the deformation performance indices of core walls were obtained by skeleton curve method and damage phenomena method,and a comparison between the two methods was made,the validity and efficiency of the skeleton curve method was demonstrated.Employing software OpenSees,the finite element(FE)models of the core wall specimens were established and verified against the test results.By using the validated FE model of the core wall specimens,an extensive parametric analysis was conducted,and the drift ratio limits for each performance levels of the core walls were obtained in terms of the skeleton curve method.Furthermore,the influence of axial load ratio,aspect ratio,span-to-depth ratio of coupling beam,and the steel ratio of steel plate bracings,inner column,corner column on drift ratios for different performance levels were discussed.The research results show that,the axial load ratio and span-to-depth ratio of the coupling beam have a significant influence on the deformation performance index limits.When the steel ratio of the steel plate bracings increases,the deformation capacity of the steel-concrete composite core wall have been improved remarkably.The aspect ratio,steel ratio of inner column and corner column have little influence on the deformation performance index limits.Based on the results of the FE models,the deformation performance index limits for different performance levels of steel-concrete composite core wall were obtained by statistically analysis.The research results can be utilized for the performance based seismic design and seismic performance evaluation of steel-concrete composite core walls.

关 键 词：钢-混凝土组合核心筒 性能状态 有限元分析 变形性能指标 含钢率 

分 类 号：TU973.17[建筑科学—结构工程]