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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Flexural behaviour of beams made of cold-formed steel sigma-shaped sections at ambient and fire conditions
Abstract This article reports a series of flexural tests at ambient and fire conditions on simply supported cold-formed steel beams made of one or two sigma-shaped profiles. It was assessed the critical temperature and time as well as the effect of the stiffeners on the beams under different restraining conditions, including no restraints, partial axial and beam supports rotational thermal restraints. The results showed that beams with web stiffeners may have different structural response in fire depending on the section shape. The beams without web stiffeners and not axially restrained presented the best structural behaviour under fire conditions.
Highlights Behaviour of cold formed steel (CFS) beams at high temperature studied. One or two sigma-shaped (I) cross-sections considered. Influence of axial and rotational restraints on the beams fire behaviour tested. Beams not axially restrained present a better structural behaviour in fire. Compression zones of beams present highly nonlinear stress distributions.
Flexural behaviour of beams made of cold-formed steel sigma-shaped sections at ambient and fire conditions
Abstract This article reports a series of flexural tests at ambient and fire conditions on simply supported cold-formed steel beams made of one or two sigma-shaped profiles. It was assessed the critical temperature and time as well as the effect of the stiffeners on the beams under different restraining conditions, including no restraints, partial axial and beam supports rotational thermal restraints. The results showed that beams with web stiffeners may have different structural response in fire depending on the section shape. The beams without web stiffeners and not axially restrained presented the best structural behaviour under fire conditions.
Highlights Behaviour of cold formed steel (CFS) beams at high temperature studied. One or two sigma-shaped (I) cross-sections considered. Influence of axial and rotational restraints on the beams fire behaviour tested. Beams not axially restrained present a better structural behaviour in fire. Compression zones of beams present highly nonlinear stress distributions.
Flexural behaviour of beams made of cold-formed steel sigma-shaped sections at ambient and fire conditions
Laím, Luís (Autor:in) / Rodrigues, João Paulo C. (Autor:in) / Craveiro, Hélder David (Autor:in)
Thin-Walled Structures ; 87 ; 53-65
05.11.2014
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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