Experimental investigation on cold-formed lipped c-channel in bending

This paper describes a four point bending test on cold-formed steel (CFS) beams with intermediate stiffeners. Researches have shown that the load-carrying capacity and the buckling behaviour of compression components of beams and columns can be improved considerably by the use of intermediate stiffeners. However, when the size of the actual intermediate stiffener did not satisfy the required minimum moment of inertia, the load-carrying capacity of the member had to be determined either on the basis of a flat element disregarding the intermediate stiffener or through tests. In this study, G550 lipped C-channels with intermediate web stiffeners were tested to determine the additional capacity provided by the stiffeners as compared to lipped C-channels without intermediate web stiffeners. The sections were tested in the minor bending axis with the stiffened web element in compression using four-point bending test. The experimental ultimate moment (