Scientific Journal Problems of Emergency Situations - Kovalov A., Otrosh Y., Tomenko V., Danilin O., Bezuhla Y., Karpets K. Estimation of the fire-protective capacity of reactive coatings of steel structures. P. 44-55.

Keywords: fire resistance, flame retardant coating, steel structures, fire retardance, fire protection ability, finite model, ANSYS software package

Abstract

Experimental studies have been carried out to determine the temperature on the unheated surface of steel plates with the minimum and maximum values of the thickness of the investigated fire retardant coating under the conditions of their tests at a standard temperature regime of fire. The results of experimental determination of temperature from an unheated surface of steel plates with a fire retardant coating under fire conditions at a standard temperature regime of fire (temperature in the furnace, temperature in certain places on the surface of steel plates, behavior of the investigated fire retardant coating) are analyzed. The influence of the coefficient of heat transfer by convection and thermal radiation on an unheated surface of a steel plate with a fire retardant coating on the accuracy of modeling thermal processes occurring under fire exposure at a standard temperature regime of a fire is investigated. A computational finite element model of the “steel plate-fire protection coating” system has been built to simulate the non-stationary heating of such a system in the ANSYS software package. Simulation of non-stationary heating of the system "steel plate fire retardant coating" with the same thickness (5 mm) and different thicknesses of the fire retardant coating (0.248 mm and 1.288 mm) at a standard temperature regime of fire in the ANSYS software package has been carried out. Comparison of the calculated data obtained (temperature from the unheated surface of a steel plate with a fire retardant coating) with the results of an experimental study of the heating of such plates during theirtests in a fired furnace at a standard temperature regime of fire is carried out. An experimental verification of the calculated finite-element model for assessing the fire-retardant ability of coatings of steel structures using the software package ANSYS. The results of numerical simulation of non-stationary heating of the system "steel plate-fire-retardant coating" with a maximum thickness of fire-retardant coating of 1.888 mm in the ANSYS software package were verified by real experiments and found that the results of experimental stud-ies and numerical analysis in ANSYS program are positively correlated. which is not more than 8%. A con-clusion is made about the adequacy of the constructed finite element model in the ANSYS software package for the "steel plate-fire protection coating" system when simulating non-stationary heating of such a system.

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