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对钢管混凝土组合刚度和换算刚度进行了比较，分析了用二种刚度计算结构内力和变位时，带来的误差。最后，结合一幢25层住宅建筑的计算结果作了比较。
A comparison was made between the combined stiffness and the conversion stiffness of concrete-filled steel tubes, and the errors caused by calculating the internal forces and displacements of the structures with two kinds of stiffnesses were analyzed. Finally, a comparison was made between the calculation results of a 25-storey residential building.