中文摘要：

为研究钢管混凝土叠合柱偏压工作性能，基于合理的材料本构关系模型，采用有限元法对钢管混凝土叠合柱偏压荷载一变形关系曲线进行了计算。将理论计算结果与试验结果进行了对比，验证了理论分析模型的正确性。在此基础上，对钢管混凝土叠合柱偏压构件的破坏模态、荷载分配、应力发展以及钢管和混凝土之间的相互作用等工作机理进行了细致分析；并研究了截面含钢管率对钢管混凝土叠合柱偏压构件力学性能的影响规律，结果表明：提高截面含钢管率虽然增加钢管混凝土在叠合柱中的承载比例，但对增加叠合柱极限承载力的效果不明显。最后建议，为保证钢管混凝土叠合柱中各组成部分的材料性能可以得到充分利用，截面含钢管率不应小于25％。

英文摘要：

The aim of this paper is to numerically investigate the behavior of concrete-filled steel tube reinforced concrete （CFSTRC） columns subjected to eccentric loads. A finite element （FE） model was established using the software ABAQUS, where the material and geometric nonlinear be- haviors were included. The calculated results showed a good agreement with the experimental one. By using this FE model, the mechanical behaviors, including the failure mode, load distribution, stress development and the interactions between steel tube and concrete of CFSTRC columns subjec- ted to eccentric loads was analyzed. Parametric studies were also carried out to investigate the influ- ence of steel tube ratio on the behavior of CFSTRC columns under eccentric loading. The results showed that the improved steel tube ratio had no significant effect on the bearing capacity of CFSTRC columns. Based on the analytical results, a reasonable steel tube ratio for the CFSTRC columns was proposed.