带约束拉杆S-CFT轴压承载力公式

FOUMULA OF THE AXIAL STRENGTH OF S-CFT WITH BINDING BARS BASED ON UNIFICATION THEORY

在已有的钢管混凝土统一理论基础上,本文结合已有的配置约束拉杆方钢管混凝土(S-CFT)轴压短柱试验结果,通过研究拉杆约束系数与构件极限承载力之间的关系,修正已有的方钢管混凝土构件轴压承载力计算公式,在公式中并入了约束拉杆的影响,得出带约束拉杆的方钢管混凝土构件轴压承载力计算公式,拓宽了统一理论计算公式的适用性,采用该公式计算的带约束拉杆的方钢管混凝土构件轴压承载力与已有的试验结果吻合良好。

Based on the unification theory and combined with existed experimental results of square concrete filled steel tubular （S - CFT） stub columns with binding bars under axial load, this paper modified the current formula of the axial strength of S - CFT according to the relation between the constraining factor of binding bars and the axial strengths of S - CFT members, and proposed a revised formula which can consider the influence of binding bars. It broadens the applicability of the formula based on unification theory. The axial strengths of S - CFT members with binding bars predicted by the formula proposed herein agree well with the exist experimental results.