矩形钢管混凝土短柱轴压承载力  

ULTIMATE CAPACITY OF AXIALLY-LOADED RECTANGULAR CFT STUB COLUMNS

作　　者：龙跃凌[1] 蔡健[2] 黄炎生[2] 

机构地区：[1]广东工业大学土木工程系,广州510641 [2]华南理工大学土木工程系,广州510641

出　　处：《工业建筑》2010年第7期95-99,共5页Industrial Construction

基　　金：国家自然科学基金资助项目(50878087);广东省自然科学基金资助项目(9451009001002744);科技部重大基础研究前期研究专项基金资助项目(2004CCA03300)

摘　　要：提出一种矩形钢管混凝土短柱轴压承载力计算的新方法。与已有的计算方法不同之处在于,所提出的方法考虑了矩形钢管截面长边、短边对核心混凝土约束作用大小不同的特点,应用基于混凝土真三轴受力试验的破坏准则确定管内核心混凝土的峰值强度;同时,考虑矩形钢管截面长边、短边的竖向强度的差异,分别计算矩形钢管长、短边的竖向强度。应用新方法对56根矩形钢管混凝土柱试件的轴压承载力进行计算,计算结果与试验结果比较表明,两者吻合良好。A new method is proposed for calculating ultimate capacity of axially loaded rectangular CFT stub columns. Compared with the previous methods,the method considers the difference between concrete confinement effect provided by broad faces and that provided by narrow faces of the steel tube. The failure criterion for concrete based on true triaxial compression test is used to predict the ultimate strength of concrete core. Also,longitudinal steel strength of broad faces and that of narrow faces are respectively calculated due to considering the difference between longitudinal steel strength of broad faces and that of narrow faces. The new method is used to calculate ultimate capacity of 56 axially loaded rectangular CFT stub column specimens. The calculated results are compared with experimental results,which show a good agreement.

关 键 词：矩形钢管混凝土 承载力 短柱 约束作用 破坏准则 

分 类 号：TU398.9[建筑科学—结构工程]