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Using X-Ray Computed Tomography To Measure Fire Degradation Of A Timber Connection
Université Clermont Auvergne, Clermont Auvergne INP, Institut Pascal, F-63000 Clermont-Ferrand, France.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0001-9196-0370
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0002-5869-2236
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-4720-5380
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2023 (English)In: World Conference on Timber Engineering (WCTE 2023): Timber for a Livable Future / [ed] Nyrud, A. Q.; Malo, K. A.; Nore, K., Oslo: World Conference on Timber Engineering 2023 (WCTE 2023) , 2023, p. 1519-1525Conference paper, Published paper (Refereed)
Abstract [en]

The charring behaviour of timber elements under fire is well understood, however, the effects of fire and heat on connections are not equally well known. Timber connections often use steel fasteners, like screws or angle brackets, which conduct heat much better than wood. Moreover, these fasteners lose their mechanical resistance and capacity under elevated temperatures. X-ray computed tomography (CT) can be used to reconstruct the internal structure of wood non-destructively. It should therefore be possible to use this technology to also study the progressive degradation due to fire of a timber connection. The goal of the present study is to investigate how CT can be used to analyse the degradation of a timber connection due to fire. Samples of Norway spruce with self-tapping screws were scanned before and after a fire exposure, and mechanical tests were performed. The results indicate that the degradation due to fire in a timber connection can be observed in CT scans, but that certain measures need to be taken to minimise the effects of image artefacts due to X-ray scattering and photon starvation.

Place, publisher, year, edition, pages
Oslo: World Conference on Timber Engineering 2023 (WCTE 2023) , 2023. p. 1519-1525
Keywords [en]
Steel-to-timber fastener, CT, Image artefacts, Image analysis, Density, Charring
National Category
Wood Science Building Technologies
Research subject
Wood Science and Engineering; Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-99213DOI: 10.52202/069179-0206Scopus ID: 2-s2.0-85172697721OAI: oai:DiVA.org:ltu-99213DiVA, id: diva2:1782771
Conference
13th World Conference on Timber Engineering 2023 (WCTE 2023), Oslo, Norway, June 19-22, 2023
Note

ISBN för värdpublikation: 9781713873273, 9781713873273

Available from: 2023-07-17 Created: 2023-07-17 Last updated: 2023-11-30Bibliographically approved

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Huber, Johannes Albert JosefHansson, LarsMensah, Rhoda Afriyie

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