The carbon fiber-reinforced polymer (CFRP)-confined concrete-filled stainless steel tubular (CFRP-CFSST) column has the superiority in outstanding mechanical properties, corrosion resistance, and low maintenance cost needed throughout its life cycle, and therefore it has a wide application prospect. In order to study the axial compression behavior of CFRP-CFSST stub column, a numerical simulation study based on the previous test was conducted. A finite element model of CFRP-CFSST was developed and the accuracy of the model was verified by the test results of typical failure modes and load-compression curves of specimens. the stress–strain responses and the interaction between different materials, which were difficult to obtain directly during tests, were disclosed through the finite model. The parametric analyses were also conducted for the sake of the effects of stainless steel, CFRP, concrete, diameter-to-thickness ratio, and cross-section area on the mechanical behavior of CFRP-CFSST. Compared the existing ultimate bearing capacity prediction formula, and a reduction factor $\varphi$ = 0.9 was adopted to the previous formula proposed by Ref. [1].

碳纤维增强聚合物（CFRP）约束混凝土填充不锈钢管（CFRP-CFSST）柱在其整个生命周期内具有出色的机械性能，耐腐蚀性和低维护成本方面的优势，因此具有广泛的应用前景。应用前景。为了研究CFRP-CFSST短柱的轴向压缩特性，在之前的试验基础上进行了数值模拟研究。建立了CFRP-CFSST的有限元模型，并通过典型破坏模式和试件的载荷-压缩曲线的测试结果验证了模型的准确性。通过有限模型揭示了应力-应变响应以及不同材料之间的相互作用，这些在测试过程中很难直接获得。出于不锈钢，CFRP，混凝土，直径/厚度比和横截面积对CFRP-CFSST力学性能的影响，还进行了参数分析。比较了现有的极限承载力预测公式和折减系数$\varphi$ Ref提出的先前公式采用= 0.9。[1]。