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Comparison of Cross- and Stress-Laminated Timber Bridge Decks
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0002-0900-5110
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.
2017 (English)Conference paper, Abstract (Refereed)
Abstract [en]

Simply supported bridge decks made of cross-laminated timber (CLT) and stress-laminated timber (SLT) are compared. The decks have a constant axle load and varying span and thickness. CLT in the form of a plate is built up from an uneven number of layers of boards with crosswise varying fibre directions. SLT is built up from glulam beams with the same fibre direction placed side by side to form a plate. Both CLT and SLT have homogenised mechanical and physical properties and can be produced as large elements. This study was conducted by comparing results from finite element simulations of bridge decks made up from SLT and CLT for various bridge spans. The ratio of timber volume needed to fulfil deflection limits for CLT and SLT increased as the bridge span increased. The ratio was 1.3 for 24 m span and width 3.2 m. The transverse displacement curve was flatter for CLT compared to SLT. Longitudinal displacement curves were similar for CLT and SLT.

Place, publisher, year, edition, pages
2017.
Keyword [en]
stress-laminated, cross-laminated, timber bridge deck, FEM, finite element method
National Category
Engineering and Technology Other Mechanical Engineering
Research subject
Wood Science and Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-63066OAI: oai:DiVA.org:ltu-63066DiVA: diva2:1089245
Conference
3rd International conference on timber bridges 2017, ICTB2017, June 26-29 2017 in Skellefteå, Sweden.
Available from: 2017-04-19 Created: 2017-04-19 Last updated: 2017-04-20Bibliographically approved

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Citation style
  • apa
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  • de-DE
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  • en-US
  • fi-FI
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