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Utdragshållfasthet hos limmade och olimmade gängstänger i limträ
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering.
2014 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

This essay examines pull-out strength of threaded rods fixed into glulam timber. The technology is intended to be used in hidden joints between glulam components. The work began with a study of literature focusing on current research within the topic, mainly to create a base of knowledge before the testing was initiated. Studies of scientific articles reveals a lack of research within this area, which makes it difficult to develop standards and calculation models for these joints. The drill holes in the tests have a diameter of 7 mm. The pull-out tests include three depths of threading as well as three fiber directions. Threaded M8 rods pencilled with glue and without glue are tested, after which the results are compared with each other. Results are indicating a slightly inferior pull-out strength parallel to the grain compared to perpendicular dito. A linear relationship between the pull-out strength and geometry of the joint can be observed, only on rods perpendicular to the grain however. More testing is needed. Prior to the experiments, assumptions were made that most of the glue was scraped off when the rod was screwed in. This appears to be correct since some non glued rods under certain conditions even showed better performance than glued ones. Statistically reliable conclusions can not be made since the quantity oftests in this work is too small. Nevertheless, the results indicates that further testing also on non glued rods is essential.

Place, publisher, year, edition, pages
2014.
Keywords [sv]
limträ, gängstång, utdragshållfasthet
National Category
Construction Management
Identifiers
URN: urn:nbn:se:hig:diva-16779OAI: oai:DiVA.org:hig-16779DiVA, id: diva2:722638
Available from: 2014-06-25 Created: 2014-06-09 Last updated: 2014-06-25Bibliographically approved

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Utdragshållfasthet hos limmade och olimmade gängstänger i limträ(2577 kB)861 downloads
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File name FULLTEXT01.pdfFile size 2577 kBChecksum SHA-512
07dd60e0ed2e7d0ded194bb16483c26bff58a14dd95abdd0cef9a040eb17136c839cd06c8f2ebdb4226dc60f602f9b84a13a08fad7710c3793e08a818a65b151
Type fulltextMimetype application/pdf

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
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  • Other style
More styles
Language
  • sv-SE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
  • de-DE
  • Other locale
More languages
Output format
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