Research of fire safety on the basis of calculation of fire risks in objects of trade and socio-cultural purpose in case of conditional fire

Abstract

The article is devoted to the study of fire safety based on the calculation of fire risks in the objects of trade and cultural purpose in the event of a conditional fire. The conditions for safe evacuation of people in the event of a fire in the areas of the object, characterized by a significant concentration of people are substantiated. In both cases, a differential (field) fire model was used to calculate the dynamics of fire hazards. The formation of a three-dimensional computational domain was carried out in the Pyrosim program. In the article, the calculations of the dynamics of fire hazards were carried out, the measurements of which were carried out in seven conventionally accepted comparison points (locations of sensors-meters OFP). The estimated time to evacuate people is generally determined by simulating the movement of people before going outside. The choice of the method for determining the estimated time of evacuation was made taking into account the specific features of the space-planning solutions of the building, as well as the features of the contingent. As a model for calculating the evacuation time, an individual flow model of human traffic was used. Calculations for the considered scenarios of fire in the area of cinemas and in the area of the shopping hall showed that the individual fire risk for people is 8.94·10-8 and 2.63·10-7 year-1, respectively, that is, does not exceed the normative value. The results of the individual fire risk assessment can be used to confirm the compliance of the object of protection with fire safety requirements.