METHOD FOR CALCULATING THE POSSIBILITY OF PROGRESSIVE DESTRUCTION OF BUILDINGS AS A RESULT OF THE FIRE

In the analysis of fire safety of building structures, in addition to considering their fire resistance, the extent of the spread of flames and other fire-technical characteristics, the probability of their progressive collapse should be considered when their individual elements are damaged. The paper proposes a calculation method for evaluating the possibility of progressive fracture, based on the assumption that one or more compressed elements are damaged and should be removed from the system, which ensures its rigidity and geometric stability. The proposed method is productive and economical compared to existing methods that involve complex mathematical models and software complexes.