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An experimental investigation of stiffened cold-formed C-channels in pure bending and primarily shear conditions

Faridmehr, Iman and Tahir, Mahmood Md. and Osman, Mohd. Hanim and Nejad, Ali Farokhi and Hodjati, Reza (2015) An experimental investigation of stiffened cold-formed C-channels in pure bending and primarily shear conditions. Thin-Walled Structures, 96 . pp. 39-48. ISSN 0263-7472

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Official URL: http://dx.doi.org/10.1016/j.tws.2015.07.023

Abstract

This paper is based on an investigation into the performance of cold-formed C-channels stiffened with cover plates and subjected to pure bending and primarily shear condition tests. Cover plates with three different thicknesses (1.6, 2 and 2.4 mm) were installed at top flanges only as it would be the predicted location for local and distortional buckling. The local and distortional buckling capacities were evaluated via Direct Strength Method, DSM, in accordance with AISI 2007. The accuracy of the interaction equation between the required flexural strength, M, and the required shear strength, V, prescribed by AISI 2007 was also investigated in this paper. A nonlinear finite element model was developed and verified against the test results in terms of maximum strength and buckling failure modes. The results explicitly showed that by attaching the cover plate on top flanges, the non-dimensional slenderness decreased resulted in improved buckling capacities, where the nominal flexural moment of sections, Mn, were close to the plastic moment, MP. Besides, it was concluded that the interaction equation between M and V predicted by AISI was conservative for sections with small non-dimensional slenderness values.

Item Type:Article
Uncontrolled Keywords:cold-formed steel, pure bending test, direct strength method, inelastic buckling strength, local buckling, distortional buckling, non-dimensional slenderness
Subjects:A General Works
ID Code:57756
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 12:07
Last Modified:11 Sep 2017 10:35

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