内埋空间钢构架-方钢管混凝土组合短柱偏心受压承载力计算

The Calculation of Eccentric Compressive Bearing Capacity of Square Steel Tube Concrete Composite Short Column Filled with Spatial Steel Frame

为了改善方形钢管混凝土柱的受压性能,在方形钢管混凝土柱中内埋空间钢构架,形成内埋空间钢构架-方形钢管混凝土组合柱,该组合柱具有更好的受压性能和变性能力。为了研究这种新型组合短柱的偏心受压承载力的计算方法,在试验研究的基础上,建立了有限元模型。有限元模拟结果表明:该组合短柱的偏心受压承载力可以由空间钢构架混凝土短柱偏心受压承载力和中空方钢管混凝土短柱偏心受压承载力叠加得到。由此建立了该组合短柱偏心受压承载力的计算公式,并通过分析对比,验证了该计算公式的可行性。

In order to improve the compression performance of concrete-filled square steel tube columns,a spatial steel frame-square steel tube concrete composite column is formed by burying spatial steel frame in concrete-filled square steel tube columns.This new type of composite column can effectively improve the compression performance and deformation ability of the new type of composite column.In order to study the calculation method of the eccentric bearing capacity of the new composite column,a finite element model is established on the basis of experimental research.The results of finite element simulation show that the eccentric compressive bearing capacity of the composite short column can be obtained by spatial steel frame concrete column and concrete-filled square steel column.In this paper,a formula of superposition of eccentric compressive bearing capacity of square steel tube concrete composite short column filled with spatial steel frame is established.Through analysis and comparison,the feasibility of the formula is verified.