中文摘要：

对复式钢管混凝土柱轴压承载力的三种计算方法进行对比研究,分析各种计算方法的原理和适用范围,结合已有试验数据及特点,对基于统一理论的方法进行改进,并将试验结果与四种计算方法结果进行对比.结果表明：基于改进的统一理论计算方法和不考虑外钢管约束的计算方法与试验结果更吻合.通过该计算方法,可以为复式钢管混凝土轴心受压承载力的计算和优化设计提供理论依据.

英文摘要：

Three methods of the computational methods for the axial compressive bearing capacity of composite-sectioned concrete filled steel tubular columns are studied contrastively.Theory and the scope of application of each method are analyzed.A modified unified theory method is presented according to the existing experimental results and characters,and the contrast analysis of the experimental results and the computational results is given.The results show that the modified unified theory method computational method without consideration of the outer steel tube confined,and after comparison,the theoretical basis for optimal design and calculating the bearing capacity is provided for of the composite concrete filled steel tubes.