摘   要：结合圆端形钢管混凝土轴压短柱试验，利用有限元软件ABAQUS建立了圆端形钢管混凝土轴压短柱计算模型。选择简化的圆端形核心混凝土本构模型，计算得到构件的荷载-轴向应变曲线，并与试验曲线进行了对比，结果表明两者吻合较好。在此基础上进行了参数分析，研究了混凝土强度等级、钢材强度等级对构件承载力的影响。模拟结果表明，构件的承载力随着混凝土、钢材强度等级的提高而提高，但随着混凝土、钢材强度等级越来越高，构件承载力提升幅度开始变缓。

Abstract: Combined with the rounded shape concrete filled steel tubular axial compression short column test, the  finite element software ABAQUS is used to establish the rounded shape steel tube concrete model for calculating the axial compression short column. A simplified circular end core concrete constitutive model is selected to calculate the load, axial strain curve and compared with the test curve. The results show that they are in good agreement between the two. The analysis of parameters is carried out to study the level of concrete strength, steel strength grade for the bearing capacity of components. The simulation results show that the bearing capacity of the component increases with the increase of concrete and steel strength grade, but the component bearing capacity increases slowly.