An Assessment of the Eurocode 3 Simplified Formulas for Distortional Buckling of Cold-Formed Steel Lipped Channels
Source abstract
Abstract
This paper concerns the Eurocode 3 Part 1-3 (EN 1993-1-3) methods for calculating the distortional buckling (bifurcation) load of cold-formed steel-lipped channels subjected to axial force, major and minor axis bending. More specifically, the paper presents the results of a parametric study that assesses the accuracy of the simplified method in EN 1993-1-3, which relies on direct/iterative hand calculations and an approximate mechanical model, through comparison with “exact” numerical results, obtained using semi-analytical linearized buckling analyses based on Generalized Beam Theory, which are also allowed by the code. Isoline error maps are presented for a wide range of geometric and material parameters, covering common commercial profiles and corresponding to a dataset of more than 24,000 cases. These maps make it possible to identify the parameter ranges leading to an acceptable error and, even though they strongly depend on the loading, general remarks concerning the expected error pertaining to the simplified method are drawn.
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Research context
OpenAlex topics: Structural Load-Bearing Analysis · Structural Engineering and Materials Analysis · Laser and Thermal Forming Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
IDMEC (Institute of Mechanical Engineering), Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal
Faculty of Engineering, Universidade Lusófona, 1749-024 Lisbon, Portugal
CERIS, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal
Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
CERIS and Departamento de Engenharia Civil, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
Funding
Portuguese Foundation for Science and Technology’s (“Fundação para a Ciência e a Tecnologia”, FCT)
References (23)
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