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Dowel deformations in multi-dowel LVL-connections under moment loading

Bader, Tomas; Schweigler, Michael; Hochreiner, Georg; Serrano, Erik LU ; Enquist, Bertil and Dorn, Michael (2015) In Wood Material Science & Engineering 10(3). p.216-231
Abstract
The aim of the experimental study presented herein is the assessment and quantification of the behavior of individual dowels in multi-dowel connections loaded by a bending moment. For this purpose, double-shear, steel-to-timber connections with nine steel dowels arranged in different patterns and with different dowel diameters were tested in four-point bending. In order to achieve a ductile behavior with up to 7° relative rotation, the connections were partly reinforced with self-tapping screws. The reinforcement did not influence the global load–deformation behavior, neither for dowel diameters of 12 mm nor for 20 mm, as long as cracking was not decisive. The deformation of the individual dowels was studied by means of a non-contact... (More)
The aim of the experimental study presented herein is the assessment and quantification of the behavior of individual dowels in multi-dowel connections loaded by a bending moment. For this purpose, double-shear, steel-to-timber connections with nine steel dowels arranged in different patterns and with different dowel diameters were tested in four-point bending. In order to achieve a ductile behavior with up to 7° relative rotation, the connections were partly reinforced with self-tapping screws. The reinforcement did not influence the global load–deformation behavior, neither for dowel diameters of 12 mm nor for 20 mm, as long as cracking was not decisive. The deformation of the individual dowels was studied by means of a non-contact deformation measurement system. Thus, the crushing deformation, that is, the deformation at the steel plate, and the bending deformation of the dowels could be quantified. In the case of 12 mm dowels, the bending deformation was larger than the crushing deformation, while it was smaller in the case of 20 mm dowels. Moreover, dowels loaded parallel to the grain showed larger bending deformations than dowels loaded perpendicular to the grain. This indicates that the loading of the individual dowels in the connection differs depending on their location. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dowel connection, bending moment, load distribution, timber, ductility, reinforcement
in
Wood Material Science & Engineering
volume
10
issue
3
pages
216 - 231
publisher
Taylor & Francis
external identifiers
  • wos:000368739700002
  • scopus:84942191975
ISSN
1748-0272
DOI
10.1080/17480272.2015.1070372
language
English
LU publication?
yes
id
d1e768f3-fd2d-4b51-b669-75a2e9b8c95f (old id 7762742)
date added to LUP
2015-09-29 14:19:47
date last changed
2017-02-12 03:13:11
@article{d1e768f3-fd2d-4b51-b669-75a2e9b8c95f,
  abstract     = {The aim of the experimental study presented herein is the assessment and quantification of the behavior of individual dowels in multi-dowel connections loaded by a bending moment. For this purpose, double-shear, steel-to-timber connections with nine steel dowels arranged in different patterns and with different dowel diameters were tested in four-point bending. In order to achieve a ductile behavior with up to 7° relative rotation, the connections were partly reinforced with self-tapping screws. The reinforcement did not influence the global load–deformation behavior, neither for dowel diameters of 12 mm nor for 20 mm, as long as cracking was not decisive. The deformation of the individual dowels was studied by means of a non-contact deformation measurement system. Thus, the crushing deformation, that is, the deformation at the steel plate, and the bending deformation of the dowels could be quantified. In the case of 12 mm dowels, the bending deformation was larger than the crushing deformation, while it was smaller in the case of 20 mm dowels. Moreover, dowels loaded parallel to the grain showed larger bending deformations than dowels loaded perpendicular to the grain. This indicates that the loading of the individual dowels in the connection differs depending on their location.},
  author       = {Bader, Tomas and Schweigler, Michael and Hochreiner, Georg and Serrano, Erik and Enquist, Bertil and Dorn, Michael},
  issn         = {1748-0272},
  keyword      = {Dowel connection,bending moment,load distribution,timber,ductility,reinforcement},
  language     = {eng},
  number       = {3},
  pages        = {216--231},
  publisher    = {Taylor & Francis},
  series       = {Wood Material Science & Engineering},
  title        = {Dowel deformations in multi-dowel LVL-connections under moment loading},
  url          = {http://dx.doi.org/10.1080/17480272.2015.1070372},
  volume       = {10},
  year         = {2015},
}