中文摘要：

为研究钢骨-钢管高强混凝土组合柱纯扭力学性能,采用ABAQUS有限元软件建立组合柱纯扭非线性有限元分析模型。分析了组合柱受力全过程、不同受力阶段的应力分布规律及最终破坏模态,研究了混凝土强度、配骨指标、钢材强度对组合柱抗扭力学性能的影响,基于强度叠加理论,提出了组合柱抗扭承载力简化计算公式,并且利用Matlab软件编写了组合柱抗扭简化承载力计算公式。结果表明,随着混凝土强度、配骨指标、钢材强度的提高,组合柱的极限抗扭承载力不断提高,其中,钢材强度影响最明显,混凝土强度次之,有限元计算所得组合柱抗扭承载力与组合柱抗扭承载力简化计算公式吻合良好。

英文摘要：

To investigate the mechanical properties of circular steel tube filled with steel reinforced high strength concrete composite column under pure torsion, nonlinear finite element analysis model of the high strength concrete composite column under pure torsion were established by software ABAQUS, the whole process under the load, the stress distribution rule under different load period and ultimate failure mode of the composite column were discussed. The influence of the strength of concrete grade, steel ratio and the strength of steel on the mechanical properties of the composite column under pure torsion is studied. Based on intensity superposition theory, the simplified calculation formula of torsion bearing capacity of composite column is put forward, and using the software Matlab for the simplified calculation formula of torsion bearing capacity of composite columns program is wrote. The results show that with the increase of concrete strength,steel ratio and the strength of steel, the torsion bearing capacity of the composite column increases. The strength of steel has a significant influence on the torsion bearing capacity of the composite column, and the second is the strength of concrete.It＇s proved that the torsion bearing capacity of the composite column calculated by finite element analysis is in good agreement with the torsion bearing capacity calculated by simplified calculation formula.