RESEARCH OF THE DESTRUCTION CONDITIONS OF GLAZING OF ENCLOSING STRUCTURES UNDER THE CONDITIONS OF THERMAL INFLUENCE OF FIRE
DOI:
https://doi.org/10.33042/2522-1809-2024-4-185-178-185Keywords:
enclosing building structures, glazing, fire resistance limit, calculation method, glass heat resistanceAbstract
The article presents the main results of mathematical modelling of the destruction of glazing of enclosing building structures with translucent elements under fire conditions. The authors analyse literature data on calculating the fire resistance of enclosing building structures with glazing. The results show that improving methods for predicting the fire resistance of glazing is relevant. Mathematical models for the numerical study of the behaviour of glazing under the thermal influence of the standard fire temperature regime are substantiated. Mathematical models of the heat transfer process involve using a non-stationary differential equation of heat conduction with boundary conditions of the third kind, accounting for the convective and radiant heat exchange between the air in the room with the fire and the glazing. As a criterion for the destruction of glazing under the influence of fire, the authors establish the temperature resistance parameter, which is determined based on the mechanical characteristics of the glass. The article highlights the relevant data on the study of temperature indicators and the mechanism of glazing failure, using mathematical modelling with well-founded mathematical models. It obtains the results of the thermal calculation by applying the finite difference method for solving the non-stationary differential equation of thermal conductivity. The methodology for determining the time of glazing failure under the influence of the standard temperature regime of a fire using the calculation parameters obtained based on well-founded mathematical models is substantiated. An analysis of the adequacy of the obtained calculation data was carried out by comparing them with the results of experimental studies using statistical criteria. As a result of the analysis, the authors confirmed the validity of the calculation data. A complete factorial experiment was conducted based on well-founded mathematical models, which revealed the regularities of the dependence of the parameters of thermomechanical processes in single-layer glass on its structural characteristics. The revealed regularities have the form of linear regression dependences of the destruction time on the thickness of the glazing and the maximum length of the glass panel without bars. Using the regularities of the dependence of the parameters of thermomechanical processes in single-layer glazing on its structural characteristics, the authors constructed reference tables for evaluating the fire resistance of enclosing structures with glazing. The research obtained new scientific data on the study of the behaviour of glazing of enclosing building structures under the thermal influence of fire through mathematical modelling, which is the basis for improving the methods of calculating the fire resistance of enclosing structures with translucent elements.
References
Long T. Phan, Therese P. McAllister, John L. Gross, Morgan J. Hurley. (2010). Best Practice Guidelines for Structural Fire Resistance Design of Concrete and Steel Buildings. NIST Technical Note 1681.
Drozdov V.A., Savyn V.K., Aleksandrov Yu.P. (1979). Heat transfer in translucent enclosing structures.
K. Machalická, M. Charvátová, M. Eliášová, P. Kuklík. (2016). The behavior of fire resistant glass under fire. Conference ICSA 2016.
A Guide to Best Practice in the Specification and Use of Fire-Resistant Glazed Systems (2009). Issue 4. Glass and Glazing Federation in UK.
Taras Shnal, Serhii Pozdieiev, Oleksandr Nuianzin, Stanislav Sidnei (2020). Improvement of the Assessment Method for Fire Resistance of Steel Structures in the Temperature Regime of Fire under Realistic Conditions. Materials Science Forum / Volume 1006. https://doi.org/10.4028/www.scientific.net/MSF.1006.107
Cuzzillo, B.R., Pagni, P.J. (1998). Thermal Breakage of Double-pane Glazing by Fire. Journal of Fire Prot. Engr. Vol. 9, No 1. DOI: 10.1177/104239159800900101
Bansal, N.P., Doremus R.H. (1986). Handbook of Glass Properties. NY.: Academic Press Inc.
McLellan, G.W., Shand E.B. (1984). Glass Engineering Handbook. NY.: McGrawHill Book Co.
Y. Wang, Q. Wang, G. Shao et al. (2014). Fracture behavior of a four-point fixed glass curtain wall under fire conditions. Fire Safety Journal, vol. 67. DOI: 10.1016/j.firesaf.2014.05.002
Perelmuter, A.V., Slivker V.I. (2002). Calculation models of structures and the possibility of their analysis. K.: Publishing house "Stal".
Downloads
Published
How to Cite
Issue
Section
License
The authors who publish in this collection agree with the following terms:
• The authors reserve the right to authorship of their work and give the magazine the right to first publish this work under the terms of license CC BY-NC-ND 4.0 (with the Designation of Authorship - Non-Commercial - Without Derivatives 4.0 International), which allows others to freely distribute the published work with a mandatory reference to the authors of the original work and the first publication of the work in this magazine.
• Authors have the right to make independent extra-exclusive work agreements in the form in which they were published by this magazine (for example, posting work in an electronic repository of an institution or publishing as part of a monograph), provided that the link to the first publication of the work in this journal is maintained. .
• Journal policy allows and encourages the publication of manuscripts on the Internet (for example, in institutions' repositories or on personal websites), both before the publication of this manuscript and during its editorial work, as it contributes to the emergence of productive scientific discussion and positively affects the efficiency and dynamics of the citation of the published work (see The Effect of Open Access).
