Original scientific paper

https://doi.org/10.5552/drvind.2023.0091

Analysis of the Effect of Gypsum-Based Fire Protection Cover on Charring of Wooden Bearing Elements

Marie Rusinová orcid.org/0000-0002-0641-5448 ; Brno University of Technology, Faculty of Civil Engineering, Brno, Czech Republic *
Miloš Lavický ; Brno University of Technology, Faculty of Civil Engineering, Brno, Czech Republic
Miloš Kalousek orcid.org/0000-0002-0641-5448 ; Brno University of Technology, Faculty of Civil Engineering, Brno, Czech Republic
Martin Sedlmajer orcid.org/0000-0003-2615-7922 ; Brno University of Technology, Faculty of Civil Engineering, Brno, Czech Republic

* Corresponding author.

Abstract

Fire resistance of load-bearing wooden structures is evaluated by the charring of surface layers of wooden bearing elements. The degree of resistance is determined by the onset and course of charring; these basic parameters are affected by the cover structure as well as by cavity fillers between the individual bearing elements. This article focuses on analysing the structure of fire protection covers based on gypsum boards, namely gypsum plasterboards and gypsum fibreboards. The foundation for the current analysis, based on the ignition temperature of the load-bearing timber element under the fire cover, includes the results of experimental fire tests carried out on test specimens in a fire furnace with a standard time-temperature curve set to simulate a fire. In addition, a numerical analysis of the temperature behaviour in the structure was carried out in order to compare the experimental results with the values obtained by mathematical analysis. Finally, the influence of the cover layers on the resulting fire resistance of the analysed structures is evaluated.

Keywords

fire resistance; ignition temperature; gypsum plasterboard; gypsum fibreboard; fire test

Hrčak ID:

308497

URI

https://hrcak.srce.hr/308497

Publication date:

29.9.2023.

Article data in other languages: croatian

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