FIRE-RESISTANCE OF BUILDING CONSTRUCTIONS PROTECTED BY UPWARPING FIREPROOF COVERAGE

Abstract

Fire-resisting features of bearing steel constructions of nuclear power plant machine halls protected by upwarping fireproof coverage has been examined. Analysis of interdependence of the temperature change of the field throughout the thickness of steel construction taking into account the change of thermophysical descriptions and geometrical sizes of coverage under the influence of fire has been carried out. On the basis of the results the methods of research of distribution of the non-stationary temperature field on the thickness of steel constructions, protected by unwarping fireproof coverage have been offered. Interdependence of fire-resistance of steel constructions and the thickness of unwarping fireproof coverage has been shown.