基于纤维模型法圆中空夹层钢管混凝土轴压柱的理论研究  

THEORETICAL STUDY OF CONCRETE-FILLED DOUBLE SKIN STEEL CIRCULAR TUBULAR COLUMNS UNDER AXIAL LOADS BASED ON FIBER MODEL METHOD

作　　者：王群雄 成志荣 刘忠[1] 章彦[1] 

机构地区：[1]湘潭大学土木工程系,湖南湘潭411105 [2]湘潭市规划建筑设计院,湖南湘潭411100

出　　处：《钢结构》2015年第10期18-22,27,共6页Steel Construction

摘　　要：针对圆中空夹层钢管混凝土轴心受压柱的力学性能,基于纤维模型法,钢管材料的本构关系依次选用5阶段模型、理想弹塑性模型两种,混凝土材料的本构关系依次选用韩林海模型、刘威模型两种,共4种不同的本构关系模型组合;对单调加载过程中圆中空夹层钢管混凝土轴压构件的荷载-变形关系进行计算,与试验结果进行对比分析。结果表明:计算出的荷载-变形关系曲线与试验曲线吻合良好;对钢管本构关系,采用5阶段模型、理想弹塑性模型分别进行纤维模型法计算,二者计算结果基本一致;对混凝土本构关系,采用韩林海模型、刘威模型分别进行纤维模型法计算,前者计算结果吻合更好。For the behavior of concrete-filled double skin steel circular tubular columns under axial loads,five-stage model and ideal elastic-plastic model were used to describe the constitutive relation of steel pipe materials based on fiber model method,as well as Han Linhai model and Liu Wei model were used to descibe the constitutive relation of concrete material.The load-deformation relationship of axial compressed members of concrete-filled double skin steel circular tubular columns under monotonic loading was calculated by four different combinations of constitutive relation models,and the experimental results were compared and analyzed.The results showed that the calculated load-deformation curves were in good agreement with the experimental curve by four different combinations of constitutive relationship models.Five-stage model and ideal elastic-plastic model were used to calculate the constitutive relation of pipe material by fiber model method,both of the results were basically the same.Han Linhai model and Liu Wei model were used to calculate the constitutive relation of concrete by fiber model method,the former calculation results was more precise.

关 键 词：圆中空夹层钢管混凝土柱 轴压 本构关系 纤维模型法 荷载-变形关系 

分 类 号：TU398.9[建筑科学—结构工程]