Abstract
The experimental evaluation of fire resistance limits for steel constructions with fire-retardant coatings consists of a lot of experiments on the heating of steel structures of buildings by solving a heat engineering problem at various fire conditions. Building design implies the assessment of compliance of actual fire resistance limits for steel constructions with the required limits. Fire resistance limits for steel constructions are determined for “standard” temperature mode, and this can lead to overestimated fire resistance and underestimated heat influence for a real fire. Estimation of the convergence for “standard” temperature mode and possible “real” fire mode, as well as of the compliance of actual fire resistance limits with real fire conditions, was realized in the following stages: mathematical modeling of real fire development by the field model in software package Fire Dynamics Simulation (FDS) with various fire loads and mathematical modeling of steel construction heating for the standard temperature mode obtained by modeling “real” fire modes (the finite difference method of solving the Fourier heat conduction equation at external and internal nonlinearities was used for modeling the process of steel structure heating with the implementation in the ANSYS mechanical software package). Experiments of the assessment of fire-protective paint’s effectiveness were carried out for standard temperature mode and obtained by modeling “real” fire modes. The equivalent fire duration dependence on fire load type was determined. This dependence can be taken into account in determination of fire resistance limits for steel constructions in warehouse building roofing. Fire-protective paint effectiveness was estimated for “standard” temperature mode and various other temperature modes.
Highlights
Compliance with normative requirements for steel construction fire resistance limits can be confirmed by experiments or calculation methods for standard temperature mode conditions [1,2,3,4].Standard temperature mode is a simple method for the assessment of building construction fire resistance limits, which does not take into account the peculiarities of fire development and spread in buildings
The evaluation of this compliance is fulfilled for the standard temperature mode, and the application of this mode can lead to overestimated fire safety parameters and the underestimation of heat influence
Two types of combustion models are used in the Fire Dynamics Simulator (FDS) software package: the combustion model for direct numerical simulation (DNS) and the combustion model for large eddy simulation (LES)
Summary
Compliance with normative requirements for steel construction fire resistance limits can be confirmed by experiments or calculation methods for standard temperature mode conditions [1,2,3,4].Standard temperature mode is a simple method for the assessment of building construction fire resistance limits, which does not take into account the peculiarities of fire development and spread in buildings. The method of computer modeling of fire development can be used for such buildings because of the high cost and impossibility of actual large-scale fire tests. Software packages such as the Fire Dynamics Simulator (FDS), Phoenics, Fluent, Sofie, Sustainability 2022, 14, 1962. Warehouse building design assumes fire resistance level compliance with the fire safety requirements taking into account approved design solutions. The evaluation of this compliance is fulfilled for the standard temperature mode, and the application of this mode can lead to overestimated fire safety parameters and the underestimation of heat influence
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.