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在分析钢管混凝土构件受弯极限状态时钢管和混凝土受力特征的基础上,建立了截面的内力平衡方程,推导了新的抗弯承载力计算公式,并给出了相关的计算图表。对国内外70个受弯试件的数据进行分析,结果表明,提出公式的计算值与试验值之比的平均值为0.933,均方差为0.098,可见计算结果与试验结果吻合良好,且略偏于安全,可以用来计算圆钢管混凝土构件的抗弯承载力。
Based on the analysis of the mechanical behavior of steel tube and concrete under the bending limit state of CFST members, the internal force balance equation of the cross section is established, and the new calculation formula of flexural capacity is deduced, and the relevant calculation chart is given. The data of 70 bending specimens at home and abroad are analyzed. The results show that the average ratio of the calculated value to the experimental value is 0.933 and the mean square error is 0.098. The calculated results are in good agreement with the experimental results In safety, it can be used to calculate the flexural capacity of CFST members.