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In-Plane Shear Test of Full Scale Cross Laminated Timber Panels

https://research.thinkwood.com/en/permalink/catalogue602
Year of Publication
2014
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Walls
Author
Araki, Yasuhiro
Nakajima, Shiro
Yamaguchi, Yoshinobu
Nakagawa, Takafumi
Miyatake, Atsushi
Yasumura, Motoi
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Walls
Topic
Mechanical Properties
Keywords
Panels
In-Plane Shear Test
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The in-plane shear specimens of full scale CLT panels are tested. From the test results, about the failure behaviour, if there is finger joint near the shear plane, cracks are tended to progress along the joint was confirmed. About the maximum shear unit stress was about 3N/mm2 , and shear stiffness was about 600GPa calculated as the total cross section effective. CLT is composed of longitudinal layers and cross layers. When the CLT is used as shear wall, it is important to understand the in-plane shear performance in order to control the structural performance of wall and joints and the collapse mechanism. Therefore, the in-plane shear specimens of full scale CLT panels are tested.
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Tensile Performance of CLT Screw Joint with Steel Plate

https://research.thinkwood.com/en/permalink/catalogue1010
Year of Publication
2014
Topic
Connections
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Nakajima, Shoichi
Araki, Yasuhiro
Goto, Hiroshi
Nakajima, Shiro
Yamaguchi, Yoshinobu
Yasumura, Motoi
Organization
Architectural Institute of Japan
Year of Publication
2014
Country of Publication
Japan
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Connections
Mechanical Properties
Keywords
Screws
Joints
Steel Plate
Tensile Performance
Laminar Boundary
Cyclic Loading
Language
Japanese
Research Status
Complete
Summary
The wood engineering community has dedicated a significant amount of effort over the last decades to establish a reliable predictive model for the load-carrying capacity of timber connections under wood failure mechanisms. Test results from various sources (Foschi and Longworth 1975; Johnsson 2003; Quenneville and Mohammad 2000; Stahl et al. 2004; Zarnani and Quenneville 2012a) demonstrate that for multi-fastener connections, failure of wood can be the dominant mode. In existing wood strength prediction models for parallel to grain failure in timber connections using dowel-type fasteners, different methods consider the minimum, maximum or the summation of the tensile and shear capacities of the failed wood block planes. This results in disagreements between the experimental values and the predictions. It is postulated that these methods are not appropriate since the stiffness in the wood blocks adjacent to the tensile and shear planes differs and this leads to uneven load distribution amongst the resisting planes (Johnsson 2004; Zarnani and Quenneville 2012a). The present study focuses on the nailed connections. A closed-form analytical method to determine the load-carrying capacity of wood under parallel-to-grain loading in small dowel-type connections in timber products is thus proposed. The proposed stiffness-based model has already been verified in brittle and mixed failure modes of timber rivet connections (Zarnani and Quenneville 2013b).
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Free
Resource Link
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