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Numerical investigation of cold-formed stainless steel lipped channels with longitudinal stiffeners subjected to shear

Dissanayake, D. M. M. P., Poologanathan, K., Gunalan, S., Tsavdaridis, K. D. ORCID: 0000-0001-8349-3979, Wanniarachchi, K. S. and Nagaratnam, B. (2021). Numerical investigation of cold-formed stainless steel lipped channels with longitudinal stiffeners subjected to shear. Thin-Walled Structures, 158, 107179. doi: 10.1016/j.tws.2020.107179

Abstract

The shear response of the cold-formed stainless steel lipped channel sections with longitudinal stiffeners has not been investigated adequately in the past. Therefore, this paper presents the details of numerical investigations conducted to study the shear behaviour of longitudinally stiffened cold-formed stainless steel lipped channel sections. Following a validation study of the finite element models of lipped channel sections, the effect of return lips and web stiffeners on the shear response of lipped channel sections was examined through comprehensive numerical parametric studies. In addition, numerical investigations were conducted to study the elastic shear buckling response of the sections and the shear buckling coefficients were back-calculated. It was found that the longitudinal web stiffeners enhance the shear buckling resistance of lipped channel sections considerably with increased stiffener depth. However, the shear capacity increment is not significant compared to plain lipped channel sections. The presence of the web stiffeners is found to be not preventing the out-of-plane buckling of the sections. The evaluation of Eurocode 3 and the direct strength method shear provisions for stainless steel channel sections with longitudinal stiffeners illustrates inaccurate capacity predictions. Therefore, modifications were proposed and comparisons reveal that the proposed provisions enhance the shear resistance predictions with good accuracy over the codified provisions.

Publication Type: Article
Additional Information: © 2020, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
Publisher Keywords: Cold-formed stainless steel, Channel sections, Longitudinal stiffeners, Shear and shear buckling, Eurocode 3, Direct strength method
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
Departments: School of Mathematics, Computer Science & Engineering > Engineering > Civil Engineering
Date available in CRO: 10 Nov 2021 10:48
Date deposited: 10 November 2021
Date of acceptance: 22 September 2020
Date of first online publication: 8 October 2020
URI: https://openaccess.city.ac.uk/id/eprint/27021
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