王  菁  蒋晓东  李四平  霍  达
    （郑州工业大学 450002）

[提要] 首先根据边缘纤维屈服准则，导出了两种材料组合的方形截面偏压柱承载力计算的正割公式，验证了这一结果可以直接应用于方钢管混凝土轴压柱承载力的计算。然后在改进的基础上给出方钢管混凝土偏压柱承载力计算的简单解析公式，可供工程设计参考。
[关键词] 方钢管混凝土柱 偏压 正割公式

The Secant formula for square cross-section columns composed of two different materials is presented. The validity of the formula for concrete-filled square steel tubular columns under axial compression is proved by experiments. Furthermore, the analytical expression for computation of the ultimate loading of concrete-filled square steel tubular columns under eccentric compression is obtained by modifying the distribution of the cross-section stress.
Keywords: concrete-filled square steel tubular column; eccentric compression; secant formula