Experimental analysis of steel beams with fire resistant properties subjected to the ISO 834 Fire

Abstract

AbstractAll buildings with human occupation need to be designed to withstand a certain standardized fire time related to the safety of their occupants. Within this context, the structure plays an extremely important role as passive fire protection element. As a result, the use of fire‐resistant steel has been produced and used to decrease the volume of passive protective material and sometimes eliminate it due to the presence of alloying elements such as niobium and molybdenum on its composition whose chemical synergy, coupled with carefully metallurgical processes, can maintain the material's mechanical properties above that those associated with the conventional steel. This paper is part of an extent research and aim to present initial experimental results of the behavior of no protected three side exposed beams under 60 minutes ISO 834 Fire curve with and without fire‐resistant properties. The tests were carried out into a horizontal furnace and the vertical deflection at the thirds of span was measured while the central was calculated based on these measurements. The experiment did not have the intention of investigate the connections, because of that, were stiffened for supporting the large plastic deformations of the specimen