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为了研究新型空间钢构架—钢管混凝土短柱的轴压极限承载力的计算方法,分析了空间钢构架—钢管混凝土轴压短柱的约束作用机理,在已有试验研究和有限元非线性分析的基础上,采用叠加法并考虑空间钢构架对钢管外混凝土的约束作用和钢管对核心混凝土的约束作用,建立了空间钢构架—钢管混凝土轴压短柱的极限承载力计算公式,其计算值与试验值符合较好,可以较好地计算空间钢构架—钢管混凝土短柱的轴压极限承载力。
In order to study the calculation method of the ultimate bearing capacity of the new type of steel frame-concrete-filled steel tubular short columns, the constrained action mechanism of the space steel frame-CFST column is analyzed. In the existing experimental research and finite element nonlinear analysis Based on the superposition method and considering the restraint effect of space steel frame on the concrete outside the pipe and the restraining effect of steel pipe to the core concrete, the formula for calculating the ultimate bearing capacity of steel reinforced concrete frame-steel tubular short columns is established. The calculated value is The test values are in good agreement, which can be used to calculate the ultimate bearing capacity of steel reinforced concrete short column under axial load.