Buckling Behavior Analysis Of Cold - Formed Thin - Walled Shaped Steel Beams

The influence of relative dimension of various parts of cold-formed Z-shaped and C-shaped steel beams on occurring of local buckling and distortional buckling were systematically investigated in this paper. Numerical analysis is carried out with finite strip software CUFSM for curling Z-shaped and C-shaped steel beams to find out the change of local buckling moment and distortional buckling moment of Z-shaped and C-shaped steel beams with a certain flange width to bead width ratio (b/d) when web height to flange width ratio (h/b) changes, and the scope of critical h/b values between local buckling and distortional buckling. The same for the change of local buckling moment and distortional buckling moment of Z-shaped and C-shaped steel beams with a certain web height to flange width ratio (h/b) when flange width to bead width ratio (b/d) varies, and the scope of critical b/d values between local buckling and distortional buckling. The conditions for occurring of local buckling and distortion buckling of curling Z-shaped and C-shaped steel beams are summarized and some conclusions are drawn, which may provide reference for further study.