矩形钢管混凝土轴压短柱三维非线性有限元分析

3D nonlinear finite element analysis on short rectangular concrete-filled steel tube columns under axial compression

利用大型有限元结构分析软件ANSYS,采用三维实体单元对矩形钢管混凝土短柱进行三维建模,同时考虑材料非线性和几何非线性,通过合理的几何建模、网格划分和正确的加载方法,模拟分析了矩形钢管混凝土短柱在轴压荷载作用下的受力性能,有限元分析结果与试验吻合较好。说明选取的材料本构关系合适,有限元分析方法正确可行,能有效的指导和补充试验。

In this paper,using the powerful structure finite element analysis software ANSYS,the 3D models of short rectangular concrete-filled steel tube columns are founded by 3D solid elements firstly.Considering material non-linear and geometry non-linear question simultaneously,simulates and analyzes the capacity behaviors of rectangular concrete-filled steel tubular short columns under axial compression through reasonable geometry modeling,meshing and correct loading method.The results of finite element analysis are in accord with experiment results well.It is testified that the material constitutive relationship is suitale,the nonlinear finite element analysis method is correct and feasible.So that it can guides availably and supplements tests.