Required number of self-drilling screws for built-up column comprising cold-formed lipped channel sections to ensure flexural buckling as a single unit member
This study analyzed the flexural buckling behavior of light-gauge built-up compression members joined by self-drilling screws by using the energy method. A nonconventional mechanical model that simulates the flexural buckling behavior of a built-up member was proposed, and the contradictions of Bleich’s model were described. A simple design formula that directly reflects the parameters of built-up members was derived based on the proposed model. Furthermore, to ensure flexural buckling as a single unit member, the required stiffening stiffness and number of self-drilling screws were proposed.
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