TY - JOUR
T1 - Numerical investigation of cold-formed stainless steel lipped channels with longitudinal stiffeners subjected to shear
AU - Dissanayake Mudiyanselage, Madhushan
AU - Poologanathan, Keerthan
AU - Gunalan, Shanmuganathan
AU - Tsavdaridis, Konstantinos D.
AU - Wanniarachchi, K. S.
AU - Nagaratnam, Brabha
N1 - Funding Information:
Authors would like to thank Northumbria University for financial support and providing the necessary research facilities to conduct this research.
Publisher Copyright:
© 2020 Elsevier Ltd
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - 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.
AB - 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.
KW - Channel sections
KW - Cold-formed stainless steel
KW - Direct strength method
KW - Eurocode 3
KW - Longitudinal stiffeners
KW - Shear and shear buckling
UR - http://www.scopus.com/inward/record.url?scp=85092055773&partnerID=8YFLogxK
U2 - 10.1016/j.tws.2020.107179
DO - 10.1016/j.tws.2020.107179
M3 - Article
SN - 0263-8231
VL - 158
JO - Thin-Walled Structures
JF - Thin-Walled Structures
M1 - 107179
ER -