Parametric Study on Cold Formed Sections

Cold-formed steel (CFS) is a new constructional material. The CFS sections have advantages like light weight, remoulability, etc. when compared with hot-rolled steel sections. CFS sections are extremely thin walled. This configuration gives them advantageous post reserve strength when used as structural element and compared with hot-rolled sections. However, research is needed to develop firm basis for such sections in comparison with typically used hot-rolled sections. Direct strength method (DSM) is a novel method presented as an alternative to effective width method. The use of such sections on field has been started. Buckling analysis and behaviour is an important criterion in direct strength method. Here, buckling analysis is carried in CUFSM software. Parametric study such as effect of longitudinal stiffener in cold-formed steel cross section, behaviour of different configuration of cold-formed steel like folded-flange and sigma is carried out. This study showed that direct strength method can be used as an alternative to effective width method given in IS 801-1975. Also, the upgrade in capacity of the cross section through longitudinal stiffener is also proved through buckling analysis.