Effects of connections on the behaviour of cold-formed unlipped channel section bearers

Cold-formed steel (CFS) unlipped channel sections are commonly used as bearers in floor systems while rectangular hollow (RHS) joists. The transverse loads from the joists do not pass through shear centre of due to different joist bearer and column connections. Hence, subjected torsion addition concentrated bending. This study investigated effects two (bolted/welded) connections, (cap plate/angle cleat) connections fly braces on structural behaviour bearers. Eight full-scale tests were performed using simplified arrangements, made with eight six RHS located at 450 mm spacing. Suitable finite element models tested including their developed validated terms ultimate failure moment, mode deflections. A parametric was then models. bolted/welded cap cleat determined discussed based experimental numerical results. recommendations design methods observed modes, most suitable combination for CFS this study.