Flexural behaviour of stiffened cold-formed steel rectangular hollow sections

Osman M.H., RAHMAN A.B.A., Saim A.A., Faridmehr I., Setiyawan P.

Abstract

Full-scale cold-formed steel beams stiffened with splice plates have been experimentally studied to investigate the strengthening effect to the section classification, flexural stiffness and moment capacity of the sections. The study was done to investigate the increasing capacity of the section. The beams were hollow rectangular section built up of C channel section and the strengthening of section was performed by adding the thickness of the compression flange and web using splice hot-rolled steel plates connected using self-drilling screws. The beam specimens were tested in bending under two point loads. The result was compared to the analytical study. It was concluded that theoretically, the stiffened beam sections can be classified as plastic section especially for the specimen with small screw spacing, assuming that a perfect composite action is achieved by the connection between the cold-formed section and the stiffener plate. In addition, the strengthening has significantly increased the moment capacity particularly to the beam stiffened with closest screw spacing.

Journal
International Journal of Earth Sciences and Engineering
Page Range
1072-1081
Publication date
2014
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