Diagonal member type selection method considering diagonal member end constraint in power transmission tower

The invention discloses a diagonal member type selection method considering diagonal member end constraint in a power transmission tower, and relates to the field of power transmission tower diagonal member type selection, and the method comprises the following steps: S1, determining a distance L between nodes at two ends of a diagonal member; s2, determining the parallel axis turning radius r of the diagonal member; s3, calculating the ratio of L to r to obtain lambda, namely lambda = L/r; s4, comparing the magnitude relationship between the lambda and the critical value m, and selecting different calculation relational expressions according to the magnitude relationship between the lambda and the critical value m to obtain a slenderness ratio correction coefficient k; and S5, the value of the slenderness ratio correction coefficient k is substituted into a stability coefficient psi formula, the calculation formula of the bearing capacity F of the diagonal member is obtained, and the angle steel model of the