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Long-term Tensile Behaviour of Engineered Wood in Parallel to Grain Direction

https://research.thinkwood.com/en/permalink/catalogue2082
Year of Publication
2018
Topic
Serviceability
Material
LVL (Laminated Veneer Lumber)

Stiffness of Dowelled Steel-to-Timber Joints

https://research.thinkwood.com/en/permalink/catalogue1497
Year of Publication
2016
Topic
Mechanical Properties
Connections
Material
Glulam (Glue-Laminated Timber)
Author
Xu, Bo-Han
Yuan, Dong-Wei
Bouchaïr, Abdelhamid
Racher, Patrick
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Topic
Mechanical Properties
Connections
Keywords
Stiffness
Dowels
Steel-to-Timber
Joints
Tensile Load
Codes
National Design Specifications for Wood Construction (NDSR)
Eurocode
Grain Orientation
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 219-226
Summary
The mechanical behaviour of timber structures is significantly influenced by the stiffness, load-carrying capacity and ductility of the joints. This study is focused on the stiffness of dowelled steel-to-timber joints, which were subjected to tensile loadings at different orientations with regard to the grain direction (0°, 30°, 45°, 60° and 90°). The values of the joint stiffness in service obtained from the tests were compared with predictive values from current design codes (Eurocode 5 and NDS). The current design codes showed their weak predictive ability. Besides timber density and fastener diameter, as well as clearance and friction between the joint members, orientation of load with respect to timber grain and dowel slenderness ratio are also the important factors that affect the stiffness of a joint. An empirical expression of stiffness for steel-to-timber joints with single dowel was proposed on the basis of the formula in Eurocode 5 and the Hankinson-type formula using non-linear fitting of the experiment results.
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