| Title: | Predicting the effective char depth in timber elements exposed to natural fires, including the cooling phase |
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| Authors: | ID Lucherini, Andrea (Author)
ID Šejnová Pitelková, Daniela (Author)
ID Mózer, Vladimír (Author) |
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| Files: |  URL - Source URL, visit https://www.proceedings.com/069179-0226.html
 PDF - Presentation file, download (4,18 MB)
MD5: 63C8458DF5725EADE7A91A30722AF513
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| Language: | English |
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| Typology: | 1.08 - Published Scientific Conference Contribution |
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| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
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| 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. |
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| Keywords: | timber structures, fire safety, heat transfer, charring, zero-strength layer, cooling |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 01.01.2023 |
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| Publisher: | World Conference on Timber Engineering |
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| Year of publishing: | 2023 |
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| Number of pages: | Str. 1681-1690 |
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| PID: | 20.500.12556/DiRROS-21196  |
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| UDC: | 624 |
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| DOI: | 10.52202/069179-0226 |
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| COBISS.SI-ID: | 158332931 |
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| Copyright: | © (2023) WORLD CONFERENCE ON TIMBER ENGINEERING 2023 (WCTE 2023) All rights reserved. |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 10. 7. 2023;
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| Publication date in DiRROS: | 14.01.2025 |
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| Views: | 801 |
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| Downloads: | 414 |
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| Metadata: |    |
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