Method to calculate the fire resistance of reinforced concrete columns with rectangular cross section

Joint studies between the National Research Council of Canada and the Portland Cement Association on reinforced concrete columns were started a number of years ago for the purpose of updating the information on fire resistance ratings for these columns in North American building codes. These studies include the development of mathematical models for the calculation of the fire resistance of columns of various sizes and shapes, as well as experimental studies. Among the columns examined were columns with rectangular cross section. In this paper, a method is described for the calculation of the fire resistance of reinforced concrete columns with such cross sections.Des \ue9tudes conjointes entre le Conseil national de recherches du Canada et la Portland Cement Association sur les colonnes en b\ue9ton arm\ue9 ont \ue9t\ue9 entreprises il y a de cela un certain nombre d?ann\ue9es auparavant aux fins de la mise \ue0 jour de l?information sur le degr\ue9 de r\ue9sistance au feu de ces colonnes dans les codes de la construction en Am\ue9rique du Nord. Ces \ue9tudes englobent la mise au point de mod\ue8les math\ue9matiques pour le calcul de la r\ue9sistance au feu de colonnes de diverses dimensions et formes, ainsi que des \ue9tudes exp\ue9rimentales. Parmi les colonnes examin\ue9es, certaines avaient une section transversale rectangulaire. Dans ce document, une m\ue9thode est d\ue9crite pour le calcul de la r\ue9sistance au feu des colonnes en b\ue9ton arm\ue9 pr\ue9sentant une telle section.Peer reviewed: YesNRC publication: Ye