L形方钢管混凝土组合异形短柱的轴压强度研究  

RESEARCH ON AXIAL COMPRESSION STRENGTH OF L-SHAPED SHORT COLUMN COMPOSED OF CONCRETE-FILLED SQUARE STEEL TUBES

作　　者：荣彬[1] 陈志华[1] 周婷[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《工业建筑》2009年第11期104-107,99,共5页Industrial Construction

基　　金：新世纪优秀人才支持计划;天津市应用基础及前沿技术研究重点项目(08JCZDJC19600);天津市建设系统科学技术发展资助项目(2008-24)

摘　　要：在分析L形方钢管混凝土组合异形柱特点的基础上,通过理论计算、有限元分析和轴压试验,对L形组合短柱的计算方法和轴压极限承载力进行研究。按照单肢高宽比等于4的原则,设计制作了L形组合短柱试件,计算采用叠加理论公式,得到试件的轴压极限承载力为3 720 kN;有限元分析采用壳单元、实体单元和接触单元,得到试件的轴压极限承载力为3 518 kN;轴压试验得到试件极限承载力为3 975 kN。分析结果可知,理论计算、有限元分析和轴压试验三者结果吻合,得到了L形组合短柱的轴压极限承载能力,并验证了采用叠加理论计算L形组合短柱轴压极限承载力的可行性。Based on characteristics of L-shaped short composite column of concrete-filled square steel tubes （LCSC）, research on calculation method and ultimate load-carrying capacity under axial compression for the special-shaped column is done by three methods： superposition theory, finite element analysis and axial compression test. One LCSC specimen is designed and manufactured with depth-width ratio is 4 for mono column. For the LCSC specimen, ultimate load attained by superposition theory is 3720 kN; ultimate load is 3518 kN according to finite elements analysis with shell element, solid element and contact elements; and ultimate load got from axial compression experiment is 3975 kN. The Results of theoretical calculation, finite elements analysis and axial compression test all show that ultimate loads from three methods accord with each other well. The ultimate load-carrying capacity of LCSC is acquired, and the feasibility of calculation in superposition theory for LCSC is proved.

关 键 词：L形组合柱 方钢管混凝土 叠加理论 极限承载力 轴压试验 

分 类 号：TU398.9[建筑科学—结构工程] TU528.31