EXPERIMENTAL RESEARCH ON THE DETERMINATION OF THE EFFICIENCY OF FIRE-PROOF CORNERS OF DIFFERENT SHAPES

Abstract

The results of full-scale experimental studies of the relative effectiveness of the facade fire-prevention eaves of a streamlined shape in terms of the process of preventing the spread of fire along vertical external enclosing structures in comparison with the standard fire-prevention eaves are presented. The structural parameters of the investigated fire eaves in the form of a direct protrusion and with the form of a «winglet» are substantiated, and the main stages of the technology of their natural creation are given. The procedure for planning the experiment and the sequence of stages of the used experimental method are described, as well as the design parameters of the installation for predicting the spread of fire along building facades. The type and characteristics of measuring equipment and information-measuring system for researching the dynamics of temperature changes on the surface of a fragment of a vertically placed facade are presented. The process of conducting full-scale experimental studies to determine the relative performance indicators of fire eaves and the actual results of the experiment are described. The substantiation of the criteria was carried out, which determined the relative effectiveness of the presented types of facade fire-resistant eaves in comparison with a standard fire-resistant eaves of a straight shape to prevent the spread of fire and a facade without them. The nature of temperature distributions due to the action of fire on the surface of the facade for the studied types of fire eaves was visualized and the obtained data were analyzed. An analysis of the potential advantages and dangers of the considered types of fire eaves for buildings and structures is given, depending on the place of their installation on the external enclosing structure. Conclusions have been made regarding the promising directions of research in terms of improving the form of facade fire-fighting eaves to ensure the most effective prevention of the spread of fire on external enclosing structures in comparison with standard facade fire-fighting obstacles.