On methods for definition of fire resistance and fire safety of steel elements of supporting constructions

Yu. P. Gul, A. V. Ivchenko, P. V. Kondratenko, V. S. Chmeleva, G. I. Perchun

Abstract



Annotation. Purpose. To substantiate the need to improve the methods for determining the characteristics of fire resistance and fire safety of steel elements of load-bearing structures and to propose new schemes for these methods. Methodology. Based on a comparative analysis of existing methods for determining the characteristics of fire resistance and fire safety and the actual conditions of thermal effects on steel elements of load-bearing structures in fires, new schemes of the considered techniques are developed and justified.  Findings. New schemes of methods for determining fire resistance and fire safety characteristics in laboratory conditions that take into account the real conditions of thermal effects on steel elements of load-bearing structures in fires and the results of such impacts are presented. Originality. For the first time in the proposed methods, the actual formation of a stressed state in the steel elements of load-bearing structures is taken into account in fires and cooling conditions after them, the need to use: various loading schemes to determine the complex of properties; Different heating and cooling rates; Determination of not only the characteristics of the deformation resistance, but also the destruction; The determination of the latter not only at ordinary but also at low temperatures; Individual approach in determining the characteristics of fire resistance and fire safety, depending on the type of construction. Practical value. The proposed methods for determining the characteristics of fire resistance and fire safety, by definition, should ensure that substantially more adequate characteristics of the actual fire resistance and fire safety of steel elements of load-bearing structures and, consequently, of the supporting structures themselves are made when this information is included in the relevant regulatory documentation on the calculation of fire resistance and fire safety of structures and structures. The use of fire resistance and fire safety characteristics obtained by new methods in the development of new steel grades with an appropriate structural state - in conjunction with the above - will raise the level of fire resistance of various structures using steel bearing structures.

Keywords


fire resistance, fire safety, elements of steel supporting structures, algorithm, laboratory tests

References


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Статья рекомендована к публикации д-рами техн. наук, В.И. Большаковым и Д.В. Лаухиным (Украина)



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