Behaviour Of Cold-Formed Steel Open Sections

Abstract

This paper presents the results of a parametric study conducted on cold-formed steel single angles and single channels, double angles and double channels both with and without lips with their ends hinged subjected to axial compression. The experiments were conducted till the specimen failed and observations were taken in the elastic and as well as in the plastic ranges of loading. The slenderness ratio of the angles tested were 15 and 30 and for channels the ratio ranged from 10 to 20. The flat width to thickness ratio of all the specimens were kept less than the limiting value. Ten different cross-sections were chosen and totally forty two experiments were conducted. In the present investigation attempt is made to study the effect of lip, thickness of the section, size of the section, material yield strength, section symmetricity on the ultimate load carrying capacity and the mode of failure. Load versus strain variation across the section, load versus axial shortening and lateral deflection behaviour is studied in this paper. The experimental ultimate loads were compared with the predicted loads prescribed by the Indian and American Standards. The failure modes of all the specimens were reported.

Journal of Civil Engineering Research and Practice Vol. 2(2) 2005: 25-37