Steel-reinforced concrete-filled circular steel tubular (SRCFT) stub columns is a novel type of composite columns, which have a great potential to be used as piers or columns in practical engineering. Hence, it is essential to comprehend the compressive performance of SRCFT stub columns and suitably predict the compressive strength for the engineering design and applications. This paper aims to investigate the compressive behavior of SRCFT stub columns through combined experimental and numerical studies. A total of 8 specimens were tested to investigate the compressive performance of SRCFT stub columns in detail, in terms of the axial load-strain curve, ultimate bearing capacity, ductility, strength-weight-ratio and strain ratio. The SRCFT stub columns exhibited better ductility than CFT stub columns. The inserted steel section can effectively prevent shear cracks in the core concrete from propagating quickly. Furthermore, finite element model was established and verified by comparing the experimental and FE results. Then, the complex composite action among the steel tube, core concrete and steel section was discussed and clarified comprehensively. In addition, the capacity of the energy dissipation for SRCFT stub columns was discussed. Finally, a novel simplified formula was proposed to predict the ultimate bearing capacity of SRCFT stub columns. The studies may provide a considerable reference for designing this type of structures in engineering practice.

钢筋混凝土圆形钢管短柱（SRCFT）是一种新型的复合柱，在实际工程中具有作为墩柱的巨大潜力。因此，必须理解SRCFT短柱的抗压性能，并适当预测工程设计和应用的抗压强度。本文旨在通过组合实验和数值研究来研究SRCFT短管柱的抗压性能。总共测试了8个样本，以研究SRCFT短柱的抗压性能，包括轴向载荷-应变曲线，极限承载力，延性，强度-重量比和应变比。SRCFT短柱比CFT短柱具有更好的延展性。插入的钢截面可以有效地防止核心混凝土中的剪切裂缝快速传播。此外，通过比较实验结果和有限元分析结果，建立并验证了有限元模型。然后，对钢管，核心混凝土和钢型材之间的复杂复合作用进行了讨论和综合阐明。此外，还讨论了SRCFT短柱的能量消耗能力。最后，提出了一个新的简化公式来预测SRCFT短柱的极限承载力。这些研究可能为工程实践中设计此类结构提供相当大的参考。全面讨论并阐明了钢管，核心混凝土和钢截面之间的复杂复合作用。此外，还讨论了SRCFT短柱的能量消耗能力。最后，提出了一个新的简化公式来预测SRCFT短柱的极限承载力。这些研究可能为工程实践中设计此类结构提供相当大的参考。全面讨论并阐明了钢管，核心混凝土和钢截面之间的复杂复合作用。此外，还讨论了SRCFT短柱的能量消耗能力。最后，提出了一个新的简化公式来预测SRCFT短柱的极限承载力。这些研究可能为工程实践中设计此类结构提供相当大的参考。