(1 西安建筑科技大学土木工程学院，710055；2 中国建筑西北设计研究院，西安710003）

［提要］对方钢管混凝土轴心受压短构件的受力机理进行了理论分析，提出了此类构件承载力计算的基本假定。采用极限平衡法，推导出钢管屈服时的构件极限承载力的解析计算式。对国内外已有试验进行对比研究，并将解析分析结果与试验数据比较，证明了提出的解析计算式的正确性。

［关键词］方钢管混凝土；极限平衡法；约束效应系数；极限承载力

Load Carrying Capacity of Concrete Filled Square Steel Tubes Under Axial Compression/Wu Jianbin1,Zhao Hongtie1,Xue Jianyang1,Ge Hongpeng2,Kang Xiliang1(1 College of Civil Engineering, Xi"an Univ. of Arch. & Tech., Xi"an 710055, China; 2 China Northwest Building Design Research Institute, Xi"an 710003, China)

Abstract:A theoretical analysis is carried out for the load carrying capacity of the axially compressed concrete filled square steel tube. Several basic assumptions on the overall mechanical property of this structure are proposed. The equation is derived for estimating the strength of the system when the steel tube yields through ultimate equilibrium method. The comparison of the experimental data and the results from the proposed equations shows good consistency.

Keywords:concrete filled square steel tubes; ultimate equilibrium method; confining parameter; ultimate bearing capacity

*国家自然科学基金资助项目(50478044)。