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Experimental investigation of the axial strength of glued-in rods in cross laminated timber

Azinovic, Boris LU ; Serrano, Erik LU orcid ; Kramar, Miha and Pazlar, Tomaz (2018) In Materials and Structures 51.
Abstract
This paper presents results from an experimental assessment of glued-in rods in cross laminated timber (CLT). For the purposes of the study more than 60 pull–pull tests were performed, where the specimens varied in terms of bonded-in length (from 80 to 400 mm), rod diameter (16–24 mm) and rod-to-grain angle (parallel and perpendicular). Several different failure modes that are not common for other applications of glued-in rods (e.g., a failure between CLT layers) were obtained for the analysed CLT specimens. It was found that these failure mechanisms can substantially influence the obtained ultimate tension loads. At the end, the experimental results were compared with empirical and semi-empirical equations for estimating the pull-out... (More)
This paper presents results from an experimental assessment of glued-in rods in cross laminated timber (CLT). For the purposes of the study more than 60 pull–pull tests were performed, where the specimens varied in terms of bonded-in length (from 80 to 400 mm), rod diameter (16–24 mm) and rod-to-grain angle (parallel and perpendicular). Several different failure modes that are not common for other applications of glued-in rods (e.g., a failure between CLT layers) were obtained for the analysed CLT specimens. It was found that these failure mechanisms can substantially influence the obtained ultimate tension loads. At the end, the experimental results were compared with empirical and semi-empirical equations for estimating the pull-out strength of glued-in rods in structural timber and glulam. The comparison showed that most of the existing equations overestimate the ultimate tension loads for specimens with the rod parallel to the grain and underestimate the ultimate tension load for specimens with the rod perpendicular to the grain. The results vary because the possible CLT failure modes were not included in previous studies. Further studies are proposed to improve the equations for glued-in rods in CLT. (Less)
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Glued-in rods, Cross laminated timber (CLT), Pull–pull experiment, Glued-in length, Rod-to-grain angle, Failure mechanisms in CLT
in
Materials and Structures
volume
51
article number
143
publisher
Springer
external identifiers
  • scopus:85055126263
ISSN
1359-5997
DOI
10.1617/s11527-018-1268-y
project
Cross Laminated Timber Beams - Rational Structural Analysis
language
English
LU publication?
yes
id
17e34472-86fd-4ac6-a992-6016bc0c5fb8
date added to LUP
2018-10-23 09:03:54
date last changed
2021-10-06 03:10:05
@article{17e34472-86fd-4ac6-a992-6016bc0c5fb8,
  abstract     = {This paper presents results from an experimental assessment of glued-in rods in cross laminated timber (CLT). For the purposes of the study more than 60 pull–pull tests were performed, where the specimens varied in terms of bonded-in length (from 80 to 400 mm), rod diameter (16–24 mm) and rod-to-grain angle (parallel and perpendicular). Several different failure modes that are not common for other applications of glued-in rods (e.g., a failure between CLT layers) were obtained for the analysed CLT specimens. It was found that these failure mechanisms can substantially influence the obtained ultimate tension loads. At the end, the experimental results were compared with empirical and semi-empirical equations for estimating the pull-out strength of glued-in rods in structural timber and glulam. The comparison showed that most of the existing equations overestimate the ultimate tension loads for specimens with the rod parallel to the grain and underestimate the ultimate tension load for specimens with the rod perpendicular to the grain. The results vary because the possible CLT failure modes were not included in previous studies. Further studies are proposed to improve the equations for glued-in rods in CLT.},
  author       = {Azinovic, Boris and Serrano, Erik and Kramar, Miha and Pazlar, Tomaz},
  issn         = {1359-5997},
  language     = {eng},
  publisher    = {Springer},
  series       = {Materials and Structures},
  title        = {Experimental investigation of the axial strength of glued-in rods in cross laminated timber},
  url          = {http://dx.doi.org/10.1617/s11527-018-1268-y},
  doi          = {10.1617/s11527-018-1268-y},
  volume       = {51},
  year         = {2018},
}