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7 records – page 1 of 1.

Development and Evaluation of CLT Shear Wall Using Drift Pinned Joint

https://research.thinkwood.com/en/permalink/catalogue673
Year of Publication
2014
Topic
Connections
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Author
Nakashima, Shoichi
Kitamori, Akihisa
Komatsu, Kohei
Que, Zeli
Isoda, Hiroshi
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Topic
Connections
Mechanical Properties
Keywords
Cedar
Shear Failure
Drift Pin Joint
Steel Connectors
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The connectors for the CLT shear wall with drift pin joint were suggested. The wall composed of five layers Japanese cedar CLT, steel connectors and drift pins (diameter d = 16mm). The horizontal shear performances of the walls were evaluated by static experiment and 2D frame analysis. The experimental parameter was number and position of drift pins. Characteristic failure was shear failure on the border of the laminae. There were good agreement on initial stiffness, yield load and second stiffness between experiment and calculation.
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Development of CLT Panels Bond-in Method for Seismic Retrofitting of RC Frame Structure

https://research.thinkwood.com/en/permalink/catalogue1860
Year of Publication
2016
Topic
Seismic
Design and Systems
Material
CLT (Cross-Laminated Timber)
Application
Walls
Frames
Author
Haba, Ryota
Kitamori, Akihisa
Mori, Takuro
Fukuhara, Takeshi
Kurihara, Takaaki
Isoda, Hiroshi
Publisher
J-STAGE
Year of Publication
2016
Country of Publication
Japan
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Walls
Frames
Topic
Seismic
Design and Systems
Keywords
Retrofit
Earthquake
Panels
Adhesive
Bonding
Language
Japanese
Research Status
Complete
Series
Journal of Structural and Construction Engineering: Transactions of AIJ
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Free
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Development of CLT Shear Frame Using Metal Plate Insert Connections

https://research.thinkwood.com/en/permalink/catalogue697
Year of Publication
2014
Topic
Connections
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Author
Kitamori, Akihisa
Nakashima, Shoichi
Isoda, Hiroshi
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Topic
Connections
Mechanical Properties
Keywords
Failure Mode
Joints
Steel Plate
Strength
Steel Connectors
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
The purpose of this study is to develop a high strength leg joint for shear wall made of small size cross laminated timber panel in a simple system. The joint of CLT in which steel plate was inserted in the central slit and fixed by high strength bolt at inside of short steel pipes was proposed. In order to grasp the failure mode and strength of CLT member, material tests on embedment and shear were carried out using small CLT blocks. The test results indicated that there is few reinforce effect by cross bonding of each lamina. It was concluded that the precise estimation of the strength of CLT member is important in order to develop the joint proposed in this paper.
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Effect of Array on Tensile Load Carrying Capacity CLT Drift Pinned Joint

https://research.thinkwood.com/en/permalink/catalogue1532
Year of Publication
2016
Topic
Connections
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Nakashima, Shoichi
Kitamori, Akihisa
Araki, Yasuhiro
Isoda, Hiroshi
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Connections
Mechanical Properties
Keywords
Reduction Coefficients
Dowel-Type Connections
Drift Pinned Joint
Tensile Tests
Stiffness
Proportional Limit Load
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 772-779
Summary
A reduction coefficient is applied in usual design of multiple dowels type connections. The numbers of stiffeners in row is one of important factor to decide this coefficient. CLT drift pinned joint showed small orthotropy against in plane tensile load. Tensile tests of multiple drift pins joints were performed to evaluate the effect of array. Numbers of drift pins n in each specimen were same (n=12), but the arrangements were different (2 x 6, 3 x 4, 4 x 3, 6 x 2). Also the grain directions were parameters (0, 90 degrees). The reduction of initial stiffness and proportional limit load showed good agreement between theoretical prediction and experimental results.
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Evaluation of Dynamic Performance of Glulam Frame Structure Composed of Slotted Bolted Connection System

https://research.thinkwood.com/en/permalink/catalogue503
Year of Publication
2014
Topic
Connections
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Frames
Author
Komatsu, Kohei
Mori, Takuro
Kitamori, Akihisa
Araki, Yasuhiro
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Frames
Topic
Connections
Mechanical Properties
Keywords
Slotted Bolted Connection
Vibration Test
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
Earthquake-resisting performance of glulam frame structure was evaluated by shaking table tests on a specially designed glulam “double cross shape” specimen composed of slotted bolted connection (SBC) system. By the first vibration test using sinusoidal wave, the specimen survived until 80% level of input waves without damage. After renewing SBC system, the second vibration test was done on a same specimen using the JMA-Kobe NS waves having a maximum acceleration of 816gal. The specimen survived until 100% level of input without damage but failed by the panel-shear when 120% level was inputted. Earthquake-resisting performance of glulam moment-resisting joints composed of SBC system was considered as satisfactory enough for ductile joint system, but improvement of panelshear of glulam member itself was recognized as a future research need.
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Evaluation of Lamination Effect on In-Plane Bending Strength of Cross Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue1542
Year of Publication
2016
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Aoyama, Tsuyoshi
Kitamori, Akihisa
Mori, Takuro
Isoda, Hiroshi
Araki, Yasuhiro
Nakagawa, Takafumi
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Bending Tests
Bending Strength
Computational Model
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 1105-1112
Summary
Various kind of in-plane bending tests of cross laminated timber (CLT) with different shapes have been previously carried out. The results indicate that the bending strength of CLT loaded in plane reduces as the number of layer increases. To evaluate this lamination effect on in-plane bending strength of CLT, a computational model based on Monte Carlo method was developed. The estimated bending strength showed the same tendency.
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Structural Behaviour of Glued Laminated Timber Beams Pre-Stressed by Compressed Wood

https://research.thinkwood.com/en/permalink/catalogue303
Year of Publication
2012
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
Anshari, Buan
Wei Guan, Zhong
Kitamori, Akihisa
Jung, Kiho
Komatsu, Kohei
Publisher
ScienceDirect
Year of Publication
2012
Country of Publication
Netherlands
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Mechanical Properties
Keywords
Compressed Wood
Reinforcement
Pre-Stressing
Moisture Content
Language
English
Research Status
Complete
Series
Construction and Building Materials
Summary
In this study, glulam beams were strengthened by inserting compressed wood (CW) blocks into the precut rectangular holes with one-thirds of the beam depth from the top of the beams. This practice was to make use of moisture-dependent swelling nature of the compressed wood which was conditioned with the moisture content significantly lower than the ambient one. The test results showed that a pre-camber was produced in the mid-span of the beam reinforced due to expansion of the compressed wood blocks on the top part of the beam. As a result, significant initial tensile and compressive stresses were generated on both the top and the bottom extreme fibres of the beam, respectively. Subsequent bending tests revealed that the initial stiffness and load carrying capacity of the pre-stressed beams were increased significantly in comparison to the beam without pre-stressing.
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7 records – page 1 of 1.