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Study on Compressive Strain of CLT Wall Bottom Under the Extreme Verical Load

https://research.thinkwood.com/en/permalink/catalogue1004
Year of Publication
2014
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Walls
Author
Oonishi, Satoshi
Nasu, Hideyuki
Karube, Yasuteru
Inayama, Masahiro
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Walls
Topic
Mechanical Properties
Keywords
Vertical Load
High-Rise
Reinforcement
Screws
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
High-rise building made of CLT increases significantly its own weight. Therefore, the collapse of the wall bottom is concerned. Main purpose of this study is to verify the effect of the reinforcement with screws for avoiding the collapse of the CLT wall bottom by extreme vertical load. Test pieces of CLT wall bottom were reinforced by screws. As a result, we got better structural result with screw reinforcement than without screw. From these experimental results, the reinforcement of CLT wall bottom using screw at perpendicular angle to the fiber direction is effective in workability because it does not need seat-dig hole.
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Study on Control Wooden Joint Rigidity, Strength and Ductility with Combinations of Wooden Fibre Directions

https://research.thinkwood.com/en/permalink/catalogue1566
Year of Publication
2016
Topic
Mechanical Properties
Connections
Material
CLT (Cross-Laminated Timber)
Author
Onishi, Satoshi
Karube, Yasuteru
Nasu, Hideyuki
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Connections
Keywords
Bolts
Screws
Joint
Rigidity
Ductility
Wood Fibre Direction
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 1597-1604
Summary
Conventionally, energy absorption of joints in wooden structure has been obtained by yield deformation of steel parts. However, we have tried to control behaviour such as rigidity type or ductility type with combinations of wood fibre direction using screws in wooden structure for joint design. We defined the combination ratio of wood fiber as Rp (Ratio of parallel). First, we used special large diameter bolts to get high rigidity and ductility with embedding into combinations of parallel and orthogonal fiber directions. Then, we used long-screw which are more common in the market. We made all CLT test pieces by ourselves. We have compared the joint behavior with experiments and analysis. As a conclusion, we got following results of this study. When Rp rises, rigidity will be higher. On the other hand, ductility will be higher when Rp falls. We suggest the relationship equation for Rp and the rigidity and ductility of the increase or decrease by the theoretical value.
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Free
Resource Link
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