Predicting the Effective Char Depth in Timber Elements Exposed to Natural Fires, Including the Cooling Phase
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00367421" target="_blank" >RIV/68407700:21110/23:00367421 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.52202/069179-0226" target="_blank" >https://doi.org/10.52202/069179-0226</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.52202/069179-0226" target="_blank" >10.52202/069179-0226</a>
Alternative languages
Result language
angličtina
Original language name
Predicting the Effective Char Depth in Timber Elements Exposed to Natural Fires, Including the Cooling Phase
Original language description
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 zerostrength 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.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20102 - Construction engineering, Municipal and structural engineering
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings from the 13th World Conference on Timber Engineering 2023
ISBN
9781713873297
ISSN
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e-ISSN
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Number of pages
10
Pages from-to
1681-1690
Publisher name
World Conference on Timber Engineering 2023
Place of publication
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Event location
Oslo
Event date
Jun 19, 2023
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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