Evaluation of fire resistance of rectangular steel columns filled with fibre-reinforced concrete

Experimental and theoretical studies that have been carried out to predict the fire resistance of rectangular hollow steel columns filled with fibre-reinforced concrete are presented in this paper. A numerical model to calculate the temperatures, deformations, and the fire resistance of loaded, rectangular, hollow steel columns filled with steel-fibre-reinforced concrete is described. Predictions from the numerical model are compared with experimental data. The results indicate that the model is capable of predicting the fire resistance of square hollow steel columns filled with fibre-reinforced concrete with an accuracy that is adequate for practical purposes. The model can be used to evaluate the fire resistance of rectangular steel columns filled with steel-fibre-reinforced concrete for any value of the significant parameters, such as load, column section dimensions, column length, concrete strength, and aggregate type in concrete, without thenecessity of testing.Cet article pr\uc8sente des \uc8tudes th\uc8oriques et exp\uc8rimentales effectu\uc8es afin de pr\uc8dire la r\uc8sistance au feu decolonnes rectangulaires creuses en acier remplies de b\uc8ton arm\uc8 de fibres. Un mod\ucble num\uc8rique calculant les temp\uc8ratures, les d\uc8formations et la r\uc8sistance au feu de colonnes creuses en acier remplies de b\uc8ton arm\uc8 de fibres et soumises ? un chargement, est d\uc8crit. Les pr\uc8dictions du mod\ucble num\uc8rique sont compar\uc8es aux donn\uc8es exp\uc8rimentales. Les r\uc8sultats indiquent que le mod\ucble est capable de pr\uc8dire la r\uc8sistance au feu des colonnes carr\uc8es creuses en acier remplies avec du b\uc8ton arm\uc8 de fibres avec une pr\uc8cision convenable ? des fins pratiques. Le mod\ucble peut \uc8valuer la r\uc8sistance au feu de colonnes rectangulaires en acier remplies de b\uc8ton arm\uc8 de fibres utilisant n\uedimporte quelle valeur pour les param\ucbtressignificatifs, tels que la charge, les dimensions de la section de la colonne, la longueur de colonne, la r\uc8sistance du b\uc8ton et le type de granulats du b\uc8ton, sans n\uc8cessiter des essais exp\uc8rimentaux.Peer reviewed: YesNRC publication: Ye