INFLUENCE OF THE SLOPE OF THE FACADE ON THE PROCESSES OF FIRE SPREAD THROUGH THE FACADES OF BUILDINGS

Abstract

Based on the results of experimental studies on the assessment of the spread of fire on the external vertical structures of buildings, the nature of changes in temperature distributions on the surface of the examined fragment of the facade, depending on the value of its slope, was determined. An analysis of problematic aspects during the evaluation of the spread of fire on external enclosing structures of a complex shape was carried out and the relevance of the conducted experimental field studies was substantiated. The stages of the organization of the experiment, the preparation of the test setup and the equipment of the measuring equipment during the simulation tests on the basis of the fire-testing range are given. The nature of the flame propagation along the investigated fragment of the facade system for each stage of research is described. On the basis of the obtained data on the temperature regime on the surface of the examined fragment of the facade, graphs of temperature dependences over time for each stage of experimental research were constructed, and corresponding polynomial regression dependences were constructed. An analysis of the possibility of fire spreading through external vertical enclosing structures to the floors above was carried out on the basis of international criteria and features of the design of facade systems. The comparison of the obtained regularities made it possible to draw conclusions about the influence of the inclination of the facade at different angles on the processes of fire propagation along external enclosing structures, as well as to determine future directions of research to ensure the qualitative assessment of fire propagation processes along the facades of buildings. The obtained results can be a prerequisite for changing the existing approaches regarding the assessment of fire propagation processes along external vertical enclosing structures, which today do not take into account such constructive characteristics of facades as the angles of their possible inclination.