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本文利用极限理论推导了单向压弯时方钢管混凝土构件截面强度的N M相关关系 ,进而提出了单向及双向压弯时截面强度的简化计算公式。并将数值分析结果及试验值与公式值进行了比较 ,证明了简化计算公式的适用性。
In this paper, the threshold theory is used to deduce the N M correlation of the cross-section strength of concrete-filled square steel tube (CFST) under uniaxial compression bending, and then the simplified formula of the cross-section strength in uniaxial and biaxial bending is proposed. The results of numerical analysis and experimental values are compared with the formula values, which proves the applicability of the simplified calculation formula.