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Prestressed timber bridges: simulations and experiments of slip
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0002-0145-080X
Martinssons Träbroar AB.
2010 (English)In: Proceedings of the International Conference Timber Bridges, ICTB2010: Lillehammer, Norway September 12 -15, 2010 / [ed] Kjell A. Malo; Otto Kleppe; Tormod Dyken, Trondheim: Tapir Akademisk Forlag, 2010Conference paper, Published paper (Refereed)
Abstract [sv]

Martinsons Träbroar produces currently around 40-50 timber bridges each year where more than half of them are transversally prestressed (stress laminated) decks. A semi-empirical beam theory model is and has been used to determine the height of the decks and the prestress levels. An alternative modelling technique using finite element methods is described in this paper. The purpose for investigating this alternative method is to increase the understanding of behaviour and load bearing capacity of prestressed timber decks. Also to increase the accuracy and efficiency of the design process.The alternative simulation model is an elastic-plastic three-dimensional finite element model. It handles all stress components and is well suited for stress design of timber bridges. The plastic material behaviour of the model makes it possible to model slip between glulam beams in a bridge deck of a prestressed timber bridge. Examples of simulation and experimental results for bridge decks are shown. The results are especially interesting when judging the behaviour of bridge decks for low levels of prestress. An important question is how these results can be interpreted when it comes to design of timber bridges and also the long-time behaviour of real timber bridges.

Place, publisher, year, edition, pages
Trondheim: Tapir Akademisk Forlag, 2010.
National Category
Other Mechanical Engineering
Research subject
Wood Technology
Identifiers
URN: urn:nbn:se:ltu:diva-30879Local ID: 4dd40280-b9c5-11df-a707-000ea68e967bISBN: 9788251926805 (electronic)OAI: oai:DiVA.org:ltu-30879DiVA: diva2:1004108
Conference
International Conference on Timber Bridges : 12/09/2010 - 15/09/2010
Note
Godkänd; 2010; 20110315 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-10-20Bibliographically approved

Open Access in DiVA

fulltext(370 kB)15 downloads
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File name FULLTEXT01.pdfFile size 370 kBChecksum SHA-512
271a77be3f67b38ca6fa1fe1f422d66cd22e5d7a43fa470dc6f77f5876e84dd32b1bd728dd07a70fcfb6805ef51f98be599ef0575979a517da16e6fec979f013
Type fulltextMimetype application/pdf

Other links

http://publisering.tapirforlag.no/fil/vis/456

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