中空夹层钢管混凝土柱轴压力学性能分析  

Behavior analysis of concrete-filled double skin steel tubular columns under axial loading

作　　者：徐汉勇[1] 余志武[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《华中科技大学学报（自然科学版）》2011年第12期123-127,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50938008/E0805)

摘　　要：在总结已有中空夹层钢管混凝土柱的特点的基础上,提出了八边形中空夹层钢管混凝土柱.为探讨此类轴压短柱和长柱的力学性能,首先通过理论分析得出试件承载力、典型破坏形态以及荷载-应变曲线;然后进行系统的试验研究,得到的试验结果与理论结果符合较好,通过对试验现象的分析得出各自的力学特点以及承载力的影响因素;最后运用该理论模型对承载力影响因素进行了尺寸拓展,并结合数值模拟数据,对影响因素进行了回归,提出了合理的八边形中空夹层钢管混凝土轴心受压柱承载力计算公式,计算值与理论分析结果、试件结果均能较好符合.In order to investigate the behavior of the stub columns and slender columns,tests were carried out completely.First based on the analysis of the test phenomena,the mechanical behavior,including the factors of the capacity was obtained.The results were in a good agreement with the results from theory analysis,including the bearing capacity,failure mode and load-strain relationships.Last a lot of numerical analyses about some factors of capacity were made by using the model,and based on the numerical data and the regressive analysis of the factors simplified formulas were derived to predict the capacity of the CFDST（concrete filled double steel tube） composite columns.The calculated values are in accord with the theoretical analysis and experiment results.

关 键 词：钢管混凝土 夹层 八边形截面 轴压柱 理论模型 承载力 

分 类 号：TU398.9[建筑科学—结构工程]