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Integrative experimental characterization and engineering modeling of single-dowel connections in LVL
Linnaeus University, Faculty of Technology, Department of Building Technology. Vienna University of Technology, Austria.
Vienna University of Technology, Austria.
Lund University.
Linnaeus University, Faculty of Technology, Department of Building Technology.
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2016 (English)In: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526, Vol. 107, 235-246 p.Article in journal (Refereed) Published
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Text
Abstract [en]

In order to be able to realistically and consistently elucidate and subsequently simulate the load displacement behavior of single-dowel connections, the material behavior of the individual components, namely steel dowels and wood, needs to be investigated. The behavior of slotted-in, single-dowel steel-to-laminated veneer lumber (LVL) connections with dowel diameters of 12 and 20 mm is thoroughly discussed here in relation to steel dowel and LVL properties. In addition to connection tests at different load-to-grain directions of 0, 45 and 90, the corresponding embedment behavior of LVL was tested up to dowel displacements of three times the dowel diameter. The material behavior of steel dowels was studied by means of tensile and 3-point bending tests and accompanying finite element simulations. A pronounced nonlinear behavior of the single-dowel connections was observed for all load-to-grain directions. In case of loading perpendicular to the grain, a significant hardening behavior was obvious. Due to the anisotropic material properties of wood, enforcing a loading direction of 45 to the grain resulted in an additional force perpendicular to the load direction which was quantified in a novel biaxial test setup. Thus, a comprehensive and consistent database over different scales of observations of dowel connections could be established, which subsequently was exploited by means of engineering modeling. The comparison of experimental and numerical data illustrates the potential of the engineering modeling approach to overcome drawbacks of current design regulations, which are unable to appropriately predict stiffness properties of dowel connections. Moreover, the quasi-elastic limit of dowel connections was calculated and discussed by means of the model. (c) 2016 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2016. Vol. 107, 235-246 p.
Keyword [en]
Dowel connection, Engineering modeling, Anisotropy, Ductility, Stiffness, Reinforcement, Laminated veneer lumber
National Category
Civil Engineering
Research subject
Technology (byts ev till Engineering), Civil engineering
Identifiers
URN: urn:nbn:se:lnu:diva-51061DOI: 10.1016/j.conbuildmat.2016.01.009ISI: 000370308000024Scopus ID: 2-s2.0-84954319869OAI: oai:DiVA.org:lnu-51061DiVA: diva2:913045
Available from: 2016-03-18 Created: 2016-03-18 Last updated: 2016-09-01Bibliographically approved

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Bader, Thomas K.Dorn, MichaelEnquist, Bertil
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  • apa
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