方钢管混凝土短柱轴压极限承载力研究  

Study on the axial ultimate bearing capacity of square concrete-filled steel tubular stub columns

作　　者：吴鹏[1] 赵均海[1] 李艳[1] 徐坚锋[1] 冯素丽[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061

出　　处：《四川建筑科学研究》2013年第3期8-13,共6页Sichuan Building Science

基　　金：国家自然科学基金资助项目(50908015);陕西省自然科学基金资助项目(2011JM7002);教育部博士点基金资助项目(20110205130001)

摘　　要：采用统一强度理论,对方钢管混凝土短柱的核心混凝土有效约束区和非有效约束区进行受力分析,通过方钢管的宽厚比对方钢管与核心混凝土间的约束效应进行控制,提出了方钢管混凝土短柱轴压极限承载力的计算公式,并对其影响因素进行了分析。然后将其推广到不同截面形式的钢管混凝土短柱轴压极限承载力的计算中,将计算值与试验值进行对比,验证了公式的合理性。该研究为钢管混凝土短柱承载力的研究提供了一定的理论依据。Based on unified strength theory,the mechanical behavior of effective restriction-area and ineffective restriction-area of coreconcrete of square concrete-filled steel tubular stub columns was analyzed.Through controlling the restriction effect between square steel tube and core-concrete by width-thickness ratio,a ultimate bearing capacity formula for square concrete-filled steel tubular stub columns under axial compression is proposed,and the influencing factors of which is also discussed.And the method is expanded to calculate other different kinds of concrete-filled steel tubular stub columns.By comparing the results of proposed formula with that of experiments,the rationality of proposed formula is proved.And the solution may have some important practical value.

关 键 词：统一强度理论 方钢管混凝土 轴压短柱 环向应力 极限承载力 

分 类 号：TU398.9[建筑科学—结构工程]