Fire performance of reinforced concrete columns

To develop general methods for the prediction of the fire resistance of reinforced concrete columns, experimental and theoretical studies were carried out. Results obtained in the first phase of the study, which involved the testing of twelve columns, are given. Of the variables studied in this phase, load, cross-section size, and type of aggregate had the largest influence on the fire resistance of the columns. The influence of concrete moisture content was, within the range studied, insignificant. Column temperatures, deformations, and fire resistance, calculated using a mathematical model, were in good agreement with those measured. The variables that will be studied in a second phase study are outlined.On a effectu\ue9 des \ue9tudes exp\ue9rimentales et th\ue9oriques en vue d'\ue9laborer des m\ue9thodes g\ue9n\ue9rales permettant de d\ue9terminer la r\ue9sistance au feu de poteaux de b\ue9ton arm\ue9. Ce document fait \ue9tat des conclusions de la premi\ue8re phase de l'\ue9tude, au cours de laquelle douze poteaux ont fait l'objet d' essais. Parmi les variables \ue9tudi\ue9es, ce sont la charge, la dimension des sections et le type de granulat qui ont eu le plus d'impact sur la r\ue9sistance au feu des poteaux. Dans les conditions \ue9tudi\ue9es, l'influence du degr\ue9 d'humidit\ue9 du b\ue9ton s'est r\ue9v\ue9l\ue9e n\ue9gligeable. Les temp\ue9ratures, les d\ue9formations et la r\ue9sistance au feu des poteaux, calcul\ue9es \ue0 l'aide d'un mod\ue8le math\ue9matique, correspondaient g\ue9n\ue9ralement \ue0 celles qui ont \ue9t\ue9 mesur\ue9es. On donne un apercu des variables qui seront examin\ue9es dans la seconde phase de l'\ue9tude.Peer reviewed: YesNRC publication: Ye