钢骨混凝土异形柱与方钢管混凝土组合异形柱受力性能的有限元分析

The Finite Element Analysis of Steel Reinforced Concrete Special-shaped Column and Combined Special-shaped Column of Concrete-filled Square Tubes to Axial Loaded

采用有限元分析软件和叠加理论分别对钢骨混凝土异形柱与方钢管混凝土组合异形柱的承载力进行分析,结果表明在总配钢量相同的情况下后者比前者的承载力约高16%～18%.有限元分析结果还表明钢骨混凝土异形柱由于混凝土被压碎、钢筋屈服而破坏,但钢骨仍具有承载力.方钢管混凝土异形柱破坏时方钢管与混凝土均已达到极限强度,其整体变形和单肢变形都不明显,各肢变形相对比较协调.

This paper analyzes the bearing capacities of steel reinforced concrete special-shaped column and combined special-shaped column of concrete-filled square tubes with the same steel amount through the finite element analysis and superposition theory. We come to a conclusion that the latter is larger than the former by about 16% to 18%. And finite element analysis results also show that steel reinforced concrete special-shaped columns damaged because of concrete crushing and reinforcement yielding, but the steel reinforced can still bear load; The stress of the concrete and steel tubes is the main factor of the combined special-shaped column of concrete-filled square tubes damaged. The deformations of them were not clear and deformed relatively coordination.