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Fire resistance of cold‐formed steel columns
Author(s) -
N. Lopes,
F. Arrais,
Paulo Vila Real
Publication year - 2016
Publication title -
steel construction
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.443
H-Index - 8
eISSN - 1867-0539
pISSN - 1867-0520
DOI - 10.1002/stco.201670036
Subject(s) - citation , forensic engineering , fire resistance , engineering , computer science , library science , materials science , composite material
Steel structural elements composed of cold-formed thin walled sections, are common in buildings due to their lightness and ability to support large spans, however they are more susceptible to the occurrence of local buckling. Additionally, in these members, when subjected to axial compression, the flexural buckling, torsional-flexural buckling and distortional buckling are also common failure modes. These instability phenomena are intensified at high temperatures. This work has the main objective of presenting a numerical study on the fire behaviour of cold-formed thin walled C sections when subjected to compression and high temperatures. The influence of different geometrical imperfections shapes and residual stresses on the ultimate load are evaluated. Comparisons between the finite element numerical results, obtained with geometric and material non-linear analysis, and the Eurocode 3 Parts 1-2 and 1-3 rules are also made.