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Experimental analysis of passively and actively reinforced glued-laminated timber with focus on ductility
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0002-0145-080x
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0003-2247-674x
2022 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280, Vol. 17, no 2, p. 129-137Article in journal (Refereed) Published
Abstract [en]

When glued-laminated timber are subjected to bending moment, they usually fail in a brittle way in the tension zone before the compressive zone reaches the compressive strength of wood. This means that the compression strength of wood is not fully exploited. By reinforcing the tension zone, the failure mode of glued-laminated timber can be changed from tensile to compressive. As a result, by utilizing the higher compressive strength, reinforced glued-laminated timber become stronger and the failure mode becomes compressive and ductile. This paper presents experimental results of the effect of steel reinforcements in the tension zone of glued-laminated timber. Four passively reinforced beams, four actively reinforced beams, and seven unreinforced beams were tested to failure in four-point bending tests. The experimental results confirmed the brittle tension failure in the unreinforced beams as well as the ductile and compressive failure in the reinforced beams. Furthermore, the experiments revealed the increase of the passively and the actively reinforced glued-laminated timber relative to the reference beams for strengths (26% and 39%) and stiffnesses (30% and 11%). Ductilities were increased from 7.7% for the reference beams to 90% and 75% for the passively and the actively reinforced glued-laminated timber, respectively.

Place, publisher, year, edition, pages
Taylor & Francis, 2022. Vol. 17, no 2, p. 129-137
Keywords [en]
Glulam, reinforcement, ductility, bending test
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-82331DOI: 10.1080/17480272.2020.1869998ISI: 000606904400001Scopus ID: 2-s2.0-85099340355OAI: oai:DiVA.org:ltu-82331DiVA, id: diva2:1516927
Note

Validerad;2022;Nivå 2;2022-04-13 (sofila)

Available from: 2021-01-13 Created: 2021-01-13 Last updated: 2022-04-13Bibliographically approved

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Ekevad, MatsÖhman, Micael

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