为了研究外包混凝土加固轴心受压钢柱的正截面承载力,基于试验和已有文献探讨了不同的初始负载、不同外包混凝土强度和不同核心型钢强度对外包混凝土加固轴心受压钢柱承载力的影响,同时基于钢筋混凝土轴心受压构件的破坏模式对加固后构件的受压破坏全过程和构件裂缝出现及发展进行了描述.最后采用系数修正法对已有的型钢混凝土正截面承载力的计算公式进行修正,从而得出外包混凝土加固轴心受压钢柱正截面承载力的计算公式,并通过试验结果与计算结果的分析比对验证公式的正确性. In order to study the normal cross-section bearing capacity of axially compressed steel columns strengthened with outsourcing concrete, the different initial load, different external concrete strength and the strength of different core sections on the external concrete-encased reinforced steel column bearing The whole process of compressive failure and the emergence and development of cracks in structural members are described based on the failure modes of reinforced concrete members under axial compression.Finally, Force formula is revised to derive the calculation formula of the bearing capacity of the normal cross-section of axially compressed steel columns strengthened with concrete, and the correctness of the verification formula is verified by comparing the test results with the calculated results.