摘要
为研究往复荷载作用下外方内圆复合钢管混凝土柱的工作机理,建立了外方内圆复合钢管混凝土柱的有限元模型并进行计算分析,将计算结果与试验结果进行比较。在此基础上,分析了混凝土损伤设置与否的影响,比较了复合钢管混凝土柱、中空夹层钢管混凝土柱、普通钢管混凝土柱、空钢管柱的滞回性能,包括滞回曲线、骨架曲线、延性、刚度和耗能等,分析了不同阶段混凝土的应力状态。研究结果表明:有限元计算的破坏形态、滞回曲线结果与试验结果吻合较好,往复荷载作用下外方内圆复合钢管混凝土柱的计算必须合理考虑混凝土材料的损伤;与其他类型柱相比,外方内圆复合钢管混凝土柱的滞回曲线饱满,其极限承载力、延性、刚度、累积滞回耗能等性能更为优越。
In order to study the working mechanism of composite-sectioned square concrete filled steel tubular（CFST）column reinforced by inner circular steel tube under cyclic loading,the finite element models were established. The calculated results were compared with the experimental results. Furthermore,the influence of considering damage of concrete or not was analyzed. The hysteretic behaviors including the hysteretic curve,skeleton line,ductility,stiffness and energy dissipation of different types of columns such as composite-sectioned CFST column reinforced by inner steel tube,concrete filled double skin steel tubular column,traditional CFST and hollow steel tubular column were compared. The stress states of concrete at different stages were analyzed also. The results showed that,the predicted failure mode and hysteretic curves using finite element models agreed relatively well with the test results. The damage of concrete material should be taken into account in the calculation of composite-sectioned square CFST column reinforced by inner circular steel tube under cyclic loading. Compared with other types of columns,the hysteretic curve of composite-sectioned square CFST column reinforced by inner circular steel tube was full. The composite-sectioned column showed its superior performance in bearing capacity,ductility,stiffness and cumulative hysteretic energy dissipation.
作者
郑永乾
何春霞
ZHENG Yongqian;HE Chunxia(Fujian Provincial Key Laboratory of Advanced Technology and Infermatization in Civil Engineering（Fujian University of Technology）,Fuzhou 350118,China;College of Civil Engineering,Fuzhou University,Fuzhou 350116,China)
出处
《钢结构》
2018年第7期27-32,共6页
Steel Construction
基金
国家自然科学基金项目(51678151)
福建省资助省属高校科研专项项目(JK2015029)
福建省科技厅项目(2015J01182)
关键词
复合钢管混凝土柱
外方内圆
往复荷载
工作机理
有限元
composite-sectioned concrete filled steel tube column
square members reinforced by inner circular tube
cyclic loading
working mechanism
finite element
