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随着现代经济地飞速发展,钢管混凝土柱由于其周期短、节省钢筋用量、承载力高以及耐火性能好等优点,在实际工程中应用越来越广泛。本文通过有限元软件ABAQUS对方钢管混凝土柱在低周反复荷载作用下承载性能进行有限元分析,然后分别从轴压比、长细比、套箍系数这3个影响因素来分析方钢管混凝土柱的滞回曲线和骨架曲线,再通过正交对比分析,研究这3个影响因素对延性系数的影响程度。通过本文的研究分析,可对今后高层建筑或者是复杂的工业厂房结构对方钢管混凝土柱抗震性能的要求提供理论分析依据。
With the rapid development of modern economy, due to its short cycle, saving the amount of steel, high bearing capacity and good fire resistance, the concrete filled steel tubular columns are more and more widely used in practical engineering. In this paper, the finite element analysis of the bearing capacity of concrete-filled square steel tubular column under low cyclic loading was carried out by using finite element software ABAQUS. Then the influence factors of axial compression ratio, slenderness ratio and ferrule coefficient were analyzed respectively Hysteresis curves and skeleton curves, and then through orthogonal comparison analysis, the impact of these three factors on the ductility factor. Through the research and analysis in this paper, we can provide theoretical analysis basis for the seismic performance of the concrete-filled steel tubular columns in high-rise buildings or complicated industrial buildings in the future.