Duration of load behaviour of a glued shear plate dowel joint
Larsson, Gustaf LU ; Gustafsson, Per Johan LU ; Serrano, Erik LU
and Crocetti, Roberto
LU
(2020)
In European Journal of Wood and Wood Products
p.5-15
- Abstract
- An experimental study on the duration of load effects in a glued shear plate dowel joint was conducted. The joint design features a single large diameter dowel for load transfers between members, via external steel plates, which are bonded to the timber with a low stiffness bond line. Due to the low bond line stiffness, the timber element is subjected to a close to uniform shear stress distribution over the bond area. The study comprises a total of 80 test specimens loaded in shear, both parallel and perpendicular to the grain, at three load levels in the range of 50–80% of the short-term failure load. All specimens failed within approximately 110 days in outdoor sheltered conditions during which time deformations were recorded for one... (More)
- An experimental study on the duration of load effects in a glued shear plate dowel joint was conducted. The joint design features a single large diameter dowel for load transfers between members, via external steel plates, which are bonded to the timber with a low stiffness bond line. Due to the low bond line stiffness, the timber element is subjected to a close to uniform shear stress distribution over the bond area. The study comprises a total of 80 test specimens loaded in shear, both parallel and perpendicular to the grain, at three load levels in the range of 50–80% of the short-term failure load. All specimens failed within approximately 110 days in outdoor sheltered conditions during which time deformations were recorded for one specimen of each type and load level. The study found a significantly larger influence of duration of load for this dominant shear action than what is reported in the literature for bending tests. The method of ranked stress was used to determine a suggested reduction factor kmod for the shear plate dowel joint to 0.10 and 0.30 for parallel and perpendicular loading, respectively. This is a rough estimate based upon a 50-year extrapolation of 4-month data. Thus, it must be concluded that the studied shear plate dowel joint is not efficient in terms of long-duration loads in outdoor sheltered climate, and that further studies are needed in order to verify the use in other climates. It is also evident in this study that there is a lack of knowledge and empirical evidence on the duration of load effects in timber for shear loading. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7b63e32e-02f0-4dde-ad7a-acb8054d9d66
- author
- Larsson, Gustaf
LU
; Gustafsson, Per Johan
LU
; Serrano, Erik
LU
and Crocetti, Roberto
LU
- organization
- publishing date
- 2020-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- duration of load, Shear plate dowel joint, Timber
- in
- European Journal of Wood and Wood Products
- pages
- 5 - 15
- publisher
- Springer
- external identifiers
-
- scopus:85074685981
- ISSN
- 1436-736X
- DOI
- 10.1007/s00107-019-01474-z
- project
- High capacity timber joints - proposal of the Shear plate dowel joint
- Provningsanläggning för långtidsförsök
- language
- English
- LU publication?
- yes
- id
- 7b63e32e-02f0-4dde-ad7a-acb8054d9d66
- date added to LUP
- 2020-02-12 15:12:24
- date last changed
- 2023-05-30 10:53:13
@article{7b63e32e-02f0-4dde-ad7a-acb8054d9d66,
abstract = {{An experimental study on the duration of load effects in a glued shear plate dowel joint was conducted. The joint design features a single large diameter dowel for load transfers between members, via external steel plates, which are bonded to the timber with a low stiffness bond line. Due to the low bond line stiffness, the timber element is subjected to a close to uniform shear stress distribution over the bond area. The study comprises a total of 80 test specimens loaded in shear, both parallel and perpendicular to the grain, at three load levels in the range of 50–80% of the short-term failure load. All specimens failed within approximately 110 days in outdoor sheltered conditions during which time deformations were recorded for one specimen of each type and load level. The study found a significantly larger influence of duration of load for this dominant shear action than what is reported in the literature for bending tests. The method of ranked stress was used to determine a suggested reduction factor kmod for the shear plate dowel joint to 0.10 and 0.30 for parallel and perpendicular loading, respectively. This is a rough estimate based upon a 50-year extrapolation of 4-month data. Thus, it must be concluded that the studied shear plate dowel joint is not efficient in terms of long-duration loads in outdoor sheltered climate, and that further studies are needed in order to verify the use in other climates. It is also evident in this study that there is a lack of knowledge and empirical evidence on the duration of load effects in timber for shear loading.}},
author = {{Larsson, Gustaf and Gustafsson, Per Johan and Serrano, Erik and Crocetti, Roberto}},
issn = {{1436-736X}},
keywords = {{duration of load; Shear plate dowel joint; Timber}},
language = {{eng}},
pages = {{5--15}},
publisher = {{Springer}},
series = {{European Journal of Wood and Wood Products}},
title = {{Duration of load behaviour of a glued shear plate dowel joint}},
url = {{http://dx.doi.org/10.1007/s00107-019-01474-z}},
doi = {{10.1007/s00107-019-01474-z}},
year = {{2020}},
}