本文从较为复杂、其曲线边缘具有凸出翼缘的工字形截面出发,经理论推导,给出了全截面的全部应力的全套计算公式。实验验证表明,其结果是正确的。文中提出的计算公式,对不同的截面型式、不同变化规律的曲线边缘、有元凸出翼缘、施加。或不施加。予应力等情况,均可适用,是对目前国内外变截面梁计算理论和计算方法的一个补充。 In this paper, starting from the more complex, I-shaped cross-sections with convex flanges at the edge of the curve, a complete set of calculation formulae for the total stress of the full section is given by theoretical derivation. Experimental verification shows that the result is correct. The formulae proposed in the paper apply to different cross-section patterns, curve edges with different changing rules, and convex flanges. Or do not apply. Prestress, etc., can be applied, which is a supplement to the calculation theory and calculation methods of variable cross-section beams at home and abroad.