中文摘要：

非等壁厚矩形钢管混凝土结构作为梁是一种截面优化的矩形钢管混凝土构件。基于相关的理论假设,推导非等壁厚矩形钢管混凝土构件抗弯承载力的理论计算公式,并通过退化分析,论证所提理论公式的正确性。最后对理论公式与试验结果进行比较,计算结果与试验值误差很小,在工程允许范围内。

英文摘要：

Unequal thickness walled rectangular concrete-filled steel tubes（CFT） are a sort of optimization design for rectangular CFT as beams.It is derived a theoretic formula for calculating the ultimate strength of unequal-thickness walled rectangular CFT members subjected to pure bending based on relevant theoretical assumptions.the correctness of the theoretical formula is demonstrated by the degenerated analysis.The results obtained by the formula agree well with those of the experiments.Which are in the permitted scope of projects.