中文摘要：

考虑圆形截面自身的特点以及截面受压区压应力的分布规律,采用数值积分的方法推导了截面受压区压应力合力作用点计算公式。在此基础上建立了新的正截面承载力计算方法。该方法计算精度较高,明显克服了规范公式在低轴压下结果偏于不安全,在高轴压下过于保守的不足。

英文摘要：

It is found that the calculated flexural capacity from formula provided in the code is significantly larger than the numerical results and test results when the axial load ratio is low,and is much smaller when the ratio is high.In order to overcome this deficiency,a new method is proposed to calculate flexural capacity,in which the characteristic of circular section and the stress distribution of the section are considered.The calculated results agree well with numerical results.