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。 Considering the characteristics of the circular section itself and the distribution of the compressive stress in the section under compressive section, the formula for calculating the point of application of the compressive stress in the section under compressive section is deduced by means of numerical integration. On this basis, a new method of calculating the bearing capacity of normal section is established. The method has high computational accuracy and obviously overcomes the shortcomings that the standard formula is unsafe at low axial pressure and too conservative under high axial pressure.