型钢混凝土柱基于变形的性能指标限值研究  

Study on deformation-based performance index limits of steel reinforced concrete columns

作　　者：蒋欢军[1] 李莹辉[1] 王鹏[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：《建筑结构学报》2016年第5期103-111,共9页Journal of Building Structures

基　　金：科技部国家重点实验室基金项目(SLDRCE14-B-21);海南省重点研发计划项目(ZDYF2016151)

摘　　要：通过对型钢混凝土(SRC)柱的性能等级划分,明确了各性能等级所对应的物理损伤状态及修复方法,以钢筋、型钢和混凝土的材料应变及构件承载力作为控制条件,综合判断SRC柱的各性能等级的界限状态。采用ABAQUS有限元软件,对按我国现行规范设计的360个弯曲破坏的SRC柱进行有限元分析,得到SRC柱各性能等级的转角限值,并且分析了轴压比、含钢率、体积配箍率、剪跨比和型钢截面形式对各性能等级转角限值的影响。研究结果表明:型钢混凝土柱内置型钢截面型式对各性能界限状态变形指标限值影响不大,轴压比对各性能等级限值影响很大,含钢率、剪跨比和体积配箍率对部分性能等级的限值有明显影响。对数值计算结果进行统计分析,得到了SRC柱各性能等级的位移角限值和塑性转角限值的统计特征值及回归表达式。研究成果可为钢-混凝土混合结构基于性能的抗震设计和抗震性能评估提供参考。The method of dividing performance levels for steel reinforced concrete（ SRC） columns and the physical damage states and repair methods corresponding to individual performance level were determined. The load carrying capacity of the specimens and the edge strain statuses of the concrete,rebar and the steel in the critical regions were used as the control condition to determine the limit states. By using ABAQUS,360 SRC column models which were designed according to the Chinese codes were analyzed to get the limit rotations for each performance levels. The effects of axial load ratio,steel ratio,stirrup ratio,shear ratio and types of encased steel on the limit rotations were also analyzed. The results indicate that the types of encased steel have little influence on the limit values,while axial load ratio has the largest effect on the limit rotations for all performance levels. In addition,steel ratio,stirrup ratio and shear ratio have obvious effects on some performance levels. Finally,the statistical characteristic values and the calculation formula for the limit rotations of SRC columns were obtained by regression analysis. The research results can be utilized for the performance based seismic design and seismic performance evaluation of steel-concrete hybrid structures.

关 键 词：型钢混凝土柱 基于变形的性能指标 有限元分析 转角限值 抗震性能等级 

分 类 号：TU398.9[建筑科学—结构工程] TU311.41