TY - JOUR
T1 - Web crippling behaviour of cold-formed high-strength steel unlipped channel beams under End-One-Flange load case
AU - Kanthasamy, Elilarasi
AU - Chandramohan, Dinesh Lakshmanan
AU - Shanmuganathan, Gunalan
AU - Poologanathan, Keerthan
AU - Gatheeshgar, Perampalam
AU - Corradi, Marco
AU - Mcintosh, Alex
N1 - Funding Information:
The authors would like to acknowledge Northumbria University , The Home Engineers and European Research Council for massive support to conduct this research study.
Publisher Copyright:
© 2022
PY - 2022/6/1
Y1 - 2022/6/1
N2 - High-strength Cold-Formed Steel (CFS) members are widely adopted as structural members in building structures due to its higher ultimate capacity. The flexural members are often subjected to concentrated transverse loads which may leads to buckling instabilities including web crippling. However, there is no appropriate design rules and studies are available to estimate the web crippling strength of high-strength CFS members. Hence, this paper presents a detailed numerical investigation on high-strength CFS unlipped channel sections subjected to End-One-Flange (EOF) loading condition with nominal yield strengths of 700 MPa, 900 MPa and 1000 MPa. For numerical simulation study, non-linear Finite Element (FE) models were developed and validated with the experimental results followed by an extensive parametric study using ABAQUS. In total, 243 FE models were developed with different geometric and material parameters including section thickness, material strength, web slenderness ratio, inside bent radius to thickness ratio and bearing length to thickness ratio. The ultimate web crippling strength results were compared with the available design guidelines to check their suitability and accuracy in terms of strength prediction. Then, new design rules to predict the web crippling capacity of high-strength CFS unlipped channel section under EOF condition based on unified and Direct Strength Method (DSM) approaches were proposed.
AB - High-strength Cold-Formed Steel (CFS) members are widely adopted as structural members in building structures due to its higher ultimate capacity. The flexural members are often subjected to concentrated transverse loads which may leads to buckling instabilities including web crippling. However, there is no appropriate design rules and studies are available to estimate the web crippling strength of high-strength CFS members. Hence, this paper presents a detailed numerical investigation on high-strength CFS unlipped channel sections subjected to End-One-Flange (EOF) loading condition with nominal yield strengths of 700 MPa, 900 MPa and 1000 MPa. For numerical simulation study, non-linear Finite Element (FE) models were developed and validated with the experimental results followed by an extensive parametric study using ABAQUS. In total, 243 FE models were developed with different geometric and material parameters including section thickness, material strength, web slenderness ratio, inside bent radius to thickness ratio and bearing length to thickness ratio. The ultimate web crippling strength results were compared with the available design guidelines to check their suitability and accuracy in terms of strength prediction. Then, new design rules to predict the web crippling capacity of high-strength CFS unlipped channel section under EOF condition based on unified and Direct Strength Method (DSM) approaches were proposed.
KW - Direct strength method
KW - End-One-Flange (EOF) load case
KW - Finite element analysis
KW - High-strength cold-formed steel
KW - Unlipped channel section
KW - Web crippling
UR - http://www.scopus.com/inward/record.url?scp=85127010610&partnerID=8YFLogxK
U2 - 10.1016/j.cscm.2022.e01022
DO - 10.1016/j.cscm.2022.e01022
M3 - Article
AN - SCOPUS:85127010610
VL - 16
JO - Case Studies in Construction Materials
JF - Case Studies in Construction Materials
SN - 2214-5095
M1 - e01022
ER -