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Response of high-strength concrete columns under design fire exposure / N. K. Raut in Journal of structural engineering, Vol. 137 N° 1 (Janvier 2011) 

Public ISBD [article]  in Journal of structural engineering > Vol. 137 N° 1 (Janvier 2011) . - pp. 69-79 Titre : Response of high-strength concrete columns under design fire exposure Type de document : texte imprimé Auteurs : N. K. Raut, Auteur ; V. K. R. Kodur, Auteur Année de publication : 2011 Article en page(s) : pp. 69-79 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Fire  resistance  tests  High-strength  concrete  Fire-induced  spalling  Reinforced  concrete  columns  Polypropylene  fibers  Design  fires Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The behavior of RC columns, especially those fabricated from high-strength concrete (HSC), under design fire exposure is not well quantified. Results from fire resistance experiments on six RC columns are presented in this paper. The test variables include concrete strength (permeability), fire scenario, load ratio and the presence of polypropylene fibers in concrete mix. Data from these fire tests is used to validate a macroscopic finite element model specifically developed for tracing the fire response of RC columns. Results from fire tests and numerical studies are used to illustrate the comparative performance of HSC and normal-strength concrete (NSC) columns under design fire conditions. Results from fire experiments show that HSC columns exhibit lower fire resistance than that of NSC columns. However both HSC and NSC columns do not experience failure under most design fire scenarios. The addition of polypropylene fibers to concrete mitigates fire-induced spalling and enhances fire resistance of HSC columns. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i1/p69_s1?isAuthorized=no [article] Response of high-strength concrete columns under design fire exposure [texte imprimé] / N. K. Raut, Auteur ; V. K. R. Kodur, Auteur . - 2011 . - pp. 69-79. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 137 N° 1 (Janvier 2011) . - pp. 69-79 Mots-clés : Fire  resistance  tests  High-strength  concrete  Fire-induced  spalling  Reinforced  concrete  columns  Polypropylene  fibers  Design  fires Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The behavior of RC columns, especially those fabricated from high-strength concrete (HSC), under design fire exposure is not well quantified. Results from fire resistance experiments on six RC columns are presented in this paper. The test variables include concrete strength (permeability), fire scenario, load ratio and the presence of polypropylene fibers in concrete mix. Data from these fire tests is used to validate a macroscopic finite element model specifically developed for tracing the fire response of RC columns. Results from fire tests and numerical studies are used to illustrate the comparative performance of HSC and normal-strength concrete (NSC) columns under design fire conditions. Results from fire experiments show that HSC columns exhibit lower fire resistance than that of NSC columns. However both HSC and NSC columns do not experience failure under most design fire scenarios. The addition of polypropylene fibers to concrete mitigates fire-induced spalling and enhances fire resistance of HSC columns. DEWEY : 624.17 ISSN : 0733-9445 En ligne : http://ascelibrary.org/sto/resource/1/jsendh/v137/i1/p69_s1?isAuthorized=no