摘  要：为研究混凝土塑性损伤模型中黏性系数对钢管混凝土轴压短柱极限承载力的影响，采用有限元分析软件ABAQUS，在合理选取材料模型的基础上，验证了模型的可靠性，并以黏性系数为主要参数，对不同截面形式的钢管混凝土轴压短柱极限承载力进行了计算和分析。结果表明：黏性系数对钢管混凝土轴压短柱荷载-变形关系曲线弹性阶段刚度影响不大；随着黏性系数取值的增大，柱构件的极限承载力也随之增大；在给定黏性系数的条件下，采用不同加载位移计算得到的柱构件极限承载力值离散性较大。此外，综合加载位移和黏性系数对承载力值和计算收敛性的影响，给出了适用于不同截面形式的钢管混凝土轴压短柱黏性系数的取值。

Abstract:  In order to investigate the influence of viscosity parameter of concrete damaged plastic model on the ultimate bearing capacity of concrete filled steel tubular stub columns, the finite element analysis software ABAQUS was adopted. The reliability of the model was verified based on reasonable constitutive models of steel and core concrete. Viscosity parameter was taken as the main parameter, the ultimate bearing capacity of concrete-filled steel tubular stub columns under axial compression with different cross-sections was calculated and analyzed. The analysis result indicates that viscosity parameter has little effect on the elastic stiffness of the load-deformation curve of concrete-filled steel tubular stub columns; with the increasing viscosity parameter value, the ultimate bearing capacity of column members gradually rise; under the condition of given viscosity coefficient, the ultimate bearing capacity of column members calculated with different loading displacements has greater discreteness. Comprehensively considering the effect of viscosity parameter and load displacement on ultimate bearing capacity and convergence, the value of viscosity parameter applicable to the different cross-sections of concrete-filled steel tubular stub columns was put forward.