Research on the Effects of Local Deformation on the Bearing Capacity of Equilateral Single-Angle Steel Members Under Axial Compression

The local deformation of angle steel members will significantly reduce the bearing capacity of the components. In the paper， finite element model comparison and validation were performed on the axial compression test results of equilateral single-angle steel members with local deformation. Meanwhile， finite element numerical analysis was conducted on equilateral angle steel compression members with different slenderness ratios to study the influence of local deformation type， deformation size， slenderness ratio， and deformation location on the bearing capacity of equilateral angle steel members under axial compression. The results showed that under different degrees of local deformation， the ultimate bearing capacity of angle steel decreased by 34.70% to 58.38%. Furthermore， the ultimate bearing capacity of angle steel decreased rapidly and then slowly increased with the increase of slenderness ratio. The influence of local deformation on the bearing capacity of angle steel decreased gradually with the increase of slenderness ratio. When the deformation size exceeded 0.3W（W was the width of the angle steel flange）， the ultimate bearing capacity of angle steel presented an approximately linear decrease trend with the increase of distance from the edge of the member.