Experimental Study on Mechanical Behavior of Cold-Formed Steel Three Limbs Built-up Section Members
18 specimens of cold-formed steel three limbs built-up section members are tested under axial compression load in this paper. The section forms are divided into two categories: A and B. Load-displacement (P-Δ) curves and failure characteristics of specimens are obtained. The results show that: As to section A members, the failure characteristics of LC, MC and SC series of specimens are flexural-torsional buckling, torsional buckling and distortional buckling, local buckling and distortional buckling. As to section B members, the failure characteristics of LC, MC series of specimens are flexural buckling, while local buckling and distortional buckling for members of SC series.
T. H. Zhou et al., "Experimental Study on Mechanical Behavior of Cold-Formed Steel Three Limbs Built-up Section Members", Advanced Materials Research, Vols. 163-167, pp. 651-654, 2011