Mechanical properties of steel-concrete composite girder during fire

Abstract

This paper is intended to summarize findings from fire test of steel-concrete composite girder as a parameter of fire temperature to clarify the distribution of the temperature and loading carrying capacity of this type of the girder during fire. The authors carried out the fire test by using large horizontal furnace and the specimen consists of H type steel and concrete slab. The steel and concrete are connected by headed studs. In conclusion, we confirmed that the deformation occurs due to the rigidity reduction. In the case of 680°C, the strain distribution of the girder exists between composite and non-composite results due to the cracks through the concrete slab. Also, in the case of 1100°C, the bending strength decreases to the moment of dead load due to fire.