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简要介绍了钢管混凝土组合柱轴心受压承载力已有的主要计算方法。在提出组合柱轴压承载力极限状态及组合柱轴压峰值应变的基础上,建立了组合柱轴压承载力计算公式。采用该文公式计算了34个组合柱试件的轴压承载力,计算值与试验值符合良好。为使轴心受压组合柱的峰值应变大于管外箍筋约束混凝土的轴压峰值应变、小于钢管混凝土的轴压峰值应变,提出了钢管混凝土截面面积在组合柱总面积中所占比例的上限值建议。
The main calculation methods for the axial compressive bearing capacity of CFST columns are briefly introduced. Based on the ultimate bearing capacity of combined column under axial load and the peak strain of composite column under axial load, the formulas for calculating the bearing capacity of composite column under axial compression are established. The axial compressive bearing capacity of 34 composite column specimens was calculated by using the formula, and the calculated values agree well with the experimental values. In order to make the peak compressive strain of the composite column with axial compression greater than the peak axial strain of the concrete confined by the outer tube stirrup and less than the peak axial strain of the concrete filled steel tube, the proportion of the concrete filled steel tubular section in the total area of the composite column Limit recommendations.