中文摘要：

为了研究钢骨—圆钢管高强混凝土长柱的力学性能,利用ABAQUS有限元分析软件建立组合柱的有限元分析模型,分析长细比、材料强度和钢管壁厚等因素对组合长柱力学性能的影响,并建立长柱的稳定极限承载力公式。研究结果表明：基于ABAQUS软件选取的力学模型符合要求;长细比、偏心率和钢管壁厚对组合长柱的受力性能影响较大,材料强度和型钢截面形状对其影响相对较小;建立的简化承载力公式计算结果与试验结果吻合良好（均值为1.039,偏差为0.046）,适用范围广。

英文摘要：

To study the mechanical properties of slender columns made of circular steel tubes filled with steel-reinforced concrete （STSRHC）, a mechanical model of the composite columns is established by the finite element software ABAQUS for the influence of the sender ratio, material strength and thickness of steel tube on the slender columns, etc. In addition, the formula of the ultimate bearing capacity of the slender columns is also established. The results indicate that the mechanical model established in ABAQUS meets the requirements. The slender ratio, eccentricity and thickness of steel tube have greater influence on the mechanical properties, and the influence of material strength and shape of built-in steel is relatively small; the bearing capacity calculated by the simplified formula is in good agreement with the experimental results （The mean value is 1. 039, and the deviation is 0. 049）, and the formula has a wide range of application.