Based on numerical simulation analysis, L-shape CFT axial compression columns with binding bars is studied in this paper. Specimens C1、C2 were taken as the research object. A three-dimensional finite element model was set up by ANSYS. The slip between steel tube and core concrete was not considered, and the bonds of steel tube, core concrete and binding bars were jointed by using of node coupling. The column cap and column base was set rigid cushion to avoid the stress concentration. The results show that the simulation model is reasonable. The parameter analysis is mechanical behavior on L-shape CFT axial compression columns with binding bars of influencing factors by using the presented mode: distance between and diameter of binding bars, width-thickness ratio and eccentricity. The results obtained in this study provide some useful references for engineering design and application.%本文采用三维有限元分析软件ANSYS,针对带约束拉杆L形钢管混凝土轴压柱的受力性能,以试验中C1、C2试件作为研究对象,建立了三维有限元数值分析模型.其中,不考虑钢管与核心混凝土之间的滑移；拉杆与核心混凝土、钢管之间的连接采用节点耦合法；为了避免应力集中,在柱顶和柱底均设置刚性垫块.计算结果表明,该模型是合理的.利用该模型,对影响带约束拉杆L形钢管混凝土轴压柱受力性能的因素:拉杆纵向间距、拉杆横向间距、拉杆直径、钢管壁厚和偏心距等,进行了参数分析,为工程设计及应用提供了参考依据.
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