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Naslov:Estimating the effective char depth in structural timber elements exposed to natural fires, considering the heating and cooling phase
Avtorji:ID Lucherini, Andrea (Avtor)
ID Šejnová Pitelková, Daniela (Avtor)
ID Mózer, Vladimír (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://www.sciencedirect.com/science/article/pii/S0141029624018170
 
.pdf PDF - Predstavitvena datoteka, prenos (6,39 MB)
MD5: 4B7E8AED64E4460E03B6509C7D641B54
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo ZAG - Zavod za gradbeništvo Slovenije
Povzetek:This research study investigates the effect of different heating and cooling regimes on the effective cross-section of timber elements exposed to natural fires. An advanced calculation method based on a 1D finite-difference heat transfer model and effective thermo-physical properties is adopted to analyse the heat penetration and the consequent reduction in mechanical properties. In particular, the research focuses on the evolution and penetration speed of the char depth (300 ◦C isotherm) and zero-strength layer (determined through in-depth temperatures and reduced mechanical properties). Results reveal how the char depth mainly develops during the heating phase, with non-negligible contributions from the cooling phase. In contrast, the zero-strength layer increases throughout the whole fire exposure, particularly during cooling and, possibly, after the end of the cooling phase. In general, the heating phase contributes about 2/3 to the total effective char depth, while the cooling phase about 1/3. The most challenging conditions were found for the fires of the longest durations (heating and overall), corresponding to low ventilation and high fuel load density conditions. The study emphasises the necessity of incorporating the cooling phase in performance-based methodologies for fire-safe timber structures to avoid under-estimating heat penetration effects.
Ključne besede:timber structures, fire safety, charring, zero-strength layer, natural fire, heating, cooling, structural fire engineering, performance-based design
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:06.11.2024
Založnik:Elsevier
Leto izida:2025
Št. strani:str. 1-16
Številčenje:Vol. 323, [article no.] 119255
PID:20.500.12556/DiRROS-20863 Novo okno
UDK:624
ISSN pri članku:1873-7323
DOI:10.1016/j.engstruct.2024.119255 Novo okno
COBISS.SI-ID:216133891 Novo okno
Avtorske pravice:© 2024 The Author(s)
Datum objave v DiRROS:22.11.2024
Število ogledov:295
Število prenosov:490
Metapodatki:XML DC-XML DC-RDF
:
LUCHERINI, Andrea, ŠEJNOVÁ PITELKOVÁ, Daniela in MÓZER, Vladimír, 2025, Estimating the effective char depth in structural timber elements exposed to natural fires, considering the heating and cooling phase. Engineering structures [na spletu]. 2025. Vol. 323, no. 119255, p. 1–16. [Dostopano 9 april 2025]. DOI 10.1016/j.engstruct.2024.119255. Pridobljeno s: https://dirros.openscience.si/IzpisGradiva.php?lang=slv&id=20863
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Gradivo je del revije

Naslov:Engineering structures
Založnik:Elsevier
ISSN:1873-7323
COBISS.SI-ID:23165701 Novo okno

Gradivo je financirano iz projekta

Financer:EC - European Commission
Program financ.:H2020
Številka projekta:952395
Naslov:Fire-safe Sustainable Built Environment
Akronim:FRISSBE
Financer:EC - European Commission
Program financ.:HE
Številka projekta:101064840
Naslov:Fundamental advances for the fire safety of tall timber structures including the fire decay phase
Akronim:FIReSafeTimber
Financer:Drugi - Drug financer ali več financerjev
Številka projekta:SGS22/009/OHK1/1T/11
Naslov:Řešení požárně nebezpečného prostoru v rizikových místech objektu

Licence

Licenca:CC BY-NC 4.0, Creative Commons Priznanje avtorstva-Nekomercialno 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by-nc/4.0/deed.sl
Opis:Licenca Creative Commons, ki prepoveduje komercialno uporabo, vendar uporabniki ne rabijo upravljati materialnih avtorskih pravic na izpeljanih delih z enako licenco.

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:lesene konstrukcije, požarna varnost, ožiganje, ničelna trdnostna plast, naravni požar, ogrevanje, hlajenje, strukturni požarni inženiring, oblikovanje na podlagi zmogljivosti


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