Experimental Studies on the Fire Resistance of Hollow Steel Columns Filled with Plain Concrete

Experimental studies were carried out to determine the fire resistance of circular and square hollow structural steel columns filled with plain concrete. The results of 44 fullscale fire resistance tests are described. The study variables included the column dimensions, steel section wall thickness, concrete strength, type of concrete aggregate, effective length, load intensity and eccentricity. These studies were conducted as part of a research program aimed at developing methods capable of predicting the fire resistance of concrete-filled hollow steel columns.On a r\ue9alis\ue9 des \ue9tudes exp\ue9rimentales dans le but de d\ue9terminer quelle \ue9tait la r\ue9sistance au feu de poteaux en acier de charpente creux, de section ronde et carr\ue9e, remplis de b\ue9ton ordinaire. Les r\ue9sultats de 44 essais de r\ue9sistance au feu en vraie grandeur sont d\ue9crits. Les variables de l'\ue9tude comprenaient les dimensions des poteaux, l'\ue9paisseur de la paroi profil\ue9e d'acier, la r\ue9sistance du b\ue9ton, le type d'agr\ue9gat de b\ue9ton, la longueur efficace, l'excentricit\ue9 et l'intensit\ue9 de la charge. Ces \ue9tudes ont \ue9t\ue9 men\ue9es dans le cadre d'un programme de recherche visant la cr\ue9ation de m\ue9thodes permettant de pr\ue9dire la tenue au feu des poteaux en acier creux remplis de b\ue9ton.Peer reviewed: NoNRC publication: Ye