薄壁方钢管混凝土短柱承载性能非线性有限元分析

采用ANSYS软件,对薄壁方钢管混凝土短柱的承栽性能进行非线性有限元分析.考虑轴压作用下带肋与不带肋两种截面形式的薄壁方钢管混凝土短柱力学性能,并得出其破坏模态,计算结果与试验结果吻合较好.针对该类构件,探讨加劲肋和钢管强度对其承载力的影响.结果表明,设置加劲肋能有效提高薄壁方钢管混凝土短柱的轴压承载力,与不带肋短拄相...

NONLINEAR ANALYSIS OF BEARING CAPACITY OF CONCRETE-FILLED SQUARE THIN-WALLED STEEL TUBULAR SHORT COLUMNS

Nonlinear analysis on the concrete-filled square thin-walled steel tubular short columns was carried out by using ANSYS.The mechanical behaviour of the concrete-filled square thin-walled steel tubular short columns with stiffener or without stiffener was considered under axial compression and its failure mode was deduced.The results of nonlinear analysis showed good agreement with those of the experiments. This paper discussed the effect of rigidity requirement of the stiffeners and strength of the steel tube on the bearing capacity.It was concluded that the stiffener could effectively improve the axial compressive capacities of the concrete-filled square thin-walled steel tubular short columns and the axial compressive capacities increased by 10.0%～13.9%,as compared with the columns without stiffeners.