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Integrative experimental characterization and engineering modeling of single-dowel connections in LVL

Bader, Thomas; Schweigler, Michael; Serrano, Erik LU ; Dorn, Michael; Enquist, Bertil and Hochreiner, Georg (2016) In Construction and Building Materials 107. p.235-246
Abstract (Swedish)
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dowel connection, Engineering modelling, Anisotropy, Ductility, Stiffness, Reinforcement, Laminated veneer lumber
in
Construction and Building Materials
volume
107
pages
12 pages
publisher
Elsevier
external identifiers
  • scopus:84954319869
  • wos:000370308000024
ISSN
0950-0618
DOI
10.1016/j.conbuildmat.2016.01.009
language
English
LU publication?
yes
id
47c55de7-bcf6-428e-8b97-8153c4a05b05
date added to LUP
2016-12-07 09:37:14
date last changed
2017-02-12 04:37:43
@article{47c55de7-bcf6-428e-8b97-8153c4a05b05,
  abstract     = {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.},
  author       = {Bader, Thomas and Schweigler, Michael and Serrano, Erik and Dorn, Michael and Enquist, Bertil and Hochreiner, Georg},
  issn         = {0950-0618},
  keyword      = {Dowel connection,Engineering modelling,Anisotropy,Ductility,Stiffness,Reinforcement,Laminated veneer lumber},
  language     = {eng},
  pages        = {235--246},
  publisher    = {Elsevier},
  series       = {Construction and Building Materials},
  title        = {Integrative experimental characterization and engineering modeling of single-dowel connections in LVL},
  url          = {http://dx.doi.org/10.1016/j.conbuildmat.2016.01.009},
  volume       = {107},
  year         = {2016},
}