Theoretical Calculation Method for Cruciform Combined Angle Steel Member of Transmission Line Tower

The cruciform combined angle steel, which is connected by bolts using filler plates, is simplified into rigid and articulated models respectively, and the equivalent slenderness ratio around the imaginary axis of the two calculation models is derived according to the deformation of the component angle. According to the actual arrangement and construction form of the cruciform combined angle steel in the transmission line tower, the equation for calculating the equivalent slenderness ratio around the imaginary axis of the cruciform combination is derived. By using the finite element method, the influence of the component angle gap of cruciform combined angle steel on the buckling bearing capacity is analysed, and the equation for calculating the equivalent slenderness ratio of cruciform combined angle steel around the imaginary axis is given.