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Title:Predicting the effective char depth in timber elements exposed to natural fires, including the cooling phase
Authors:ID Lucherini, Andrea (Author)
ID Šejnová Pitelková, Daniela (Author)
ID Mózer, Vladimír (Author)
Files:URL URL - Source URL, visit https://www.proceedings.com/069179-0226.html
 
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MD5: 63C8458DF5725EADE7A91A30722AF513
 
Language:English
Typology:1.08 - Published Scientific Conference Contribution
Organization:Logo ZAG - Slovenian National Building and Civil Engineering Institute
Abstract:This paper presents a numerical study on the effect of the heating and cooling phases on the reduction of the effective cross-section of timber elements, in particular on the evolution of the char depth (300°C isotherm) and zero- strength layer. An advanced calculation method based a finite-difference heat transfer model is compared to the simplified approach suggested by Eurocode 5. For the heating phase, defined as the standard fire curve (ISO 834), the simplified Eurocode 5 method generally provides more conservative char depths, while the zero-strength layer is under-predicted. Nevertheless, the values of effective char depth are comparable. Including the cooling phase evidences that, during this phase, the heat wave penetration leads to a significant increase in the char depth and zero-strength layer. Particularly, this increase directly depends on the fire cooling rate: a slower cooling phase further reduces the effective cross-section of timber members. As a result, this research highlights how the heat wave penetration during the fire cooling phase can significantly reduce the load-bearing capacity of timber elements.
Keywords:timber structures, fire safety, heat transfer, charring, zero-strength layer, cooling
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2023
Publisher:World Conference on Timber Engineering
Year of publishing:2023
Number of pages:Str. 1681-1690
PID:20.500.12556/DiRROS-21196 New window
UDC:624
DOI:10.52202/069179-0226 New window
COBISS.SI-ID:158332931 New window
Copyright:© (2023) WORLD CONFERENCE ON TIMBER ENGINEERING 2023 (WCTE 2023) All rights reserved.
Note:Nasl. z nasl. zaslona; Opis vira z dne 10. 7. 2023;
Publication date in DiRROS:14.01.2025
Views:227
Downloads:111
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LUCHERINI, Andrea, ŠEJNOVÁ PITELKOVÁ, Daniela and MÓZER, Vladimír, 2023, Predicting the effective char depth in timber elements exposed to natural fires, including the cooling phase. In : WCTE 2023 [online]. Published Scientific Conference Contribution. S. l. : World Conference on Timber Engineering. 2023. p. 1681–1690. [Accessed 7 April 2025]. Retrieved from: https://dirros.openscience.si/IzpisGradiva.php?lang=eng&id=21196
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Record is a part of a monograph

Title:WCTE 2023 : Proceedings from the 13th World Conference on Timber Engineering, 18-22 june, 2023, Oslo, Norway
Editors:Anders Q. Nyrud, Kjell Arne Malo
Place of publishing:[S. l.]
Publisher:World Conference on Timber Engineering
Year of publishing:2023
ISBN:978-1-7138-7327-3
COBISS.SI-ID:156463107 New window

Document is financed by a project

Funder:EC - European Commission
Project number:952395
Name:Fire-safe Sustainable Built Environment
Acronym:FRISSBE

Secondary language

Language:Slovenian
Keywords:lesene konstrukcije, požarna varnost, prenos toplote, zoglenitev, sloj ničelne trdnosti, hlajenje


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