BEHAVIOUR OF COLD-FORMED STEEL CHANNEL SECTIONS UNDER AXIAL COMPRESSION
In this paper experimental and numerical investigation into strengths and behavior of cold formed single and double channels both with and without lips with their support conditions as ends hinged, using finite element analysis is presented. Geometric and material non-linearity has also been included in the finite element model. It is demonstrated that the FEA models closely predicts the experimental load and also the mode of failure of the specimens. Hence the model was used for an extensive parametric study of cross section geometries. The design column strengths calculated using the finite element method are compared with the IS: 801, BS: 5950 (Part 5) and NAS Manual. In this present investigation an attempt is made to study the effect of lip, thickness of the section, size of the section, yield strength of the material on the modes of failure. It is shown that the design column strengths calculated based on the codal specifications generally yields conservative results in comparison with experimental strength in case of both single and double channels.