Structural Behaviour of Cold-formed Cut-curved Channel Steel Section Under Compression

Abstract

Cold-formed steel (CFS) with variety of shape, thickness and steel grade is becoming a popular choice of structure in civil engineering work and building, especially for roof truss system, pallet racking, wall panel and etc. Curved steel element is important in the analysis that be suited by the architectural drawing and structural demand. CFS with a curved section for unique roof truss design is studied. The CFS is curved by using the method of cut-curving in which the CFS section is cut at a certain length and then curved into desired profile. The experiment for determining the mechanical behaviour of the section is by using the compression strength of the column. The height of column is fixed at 600mm but the method for strengthening the cut-curving is varied. There are four types of cut-curving with a variation of strengthening method. The method for strengthening the cut-curved section is by using welding, plate and self-drilling screw. From the compression strength experiment, the cut-curved with full weld and plate is recorded, 21.26% less than the normal straight column.