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7 records – page 1 of 1.

Bending Properties of Cross Laminated Timber with Layer Arrangement Using Different Species

https://research.thinkwood.com/en/permalink/catalogue1599
Year of Publication
2016
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Park, Sun-Hyang
Kim, Keon-Ho
Lee, Sang-Joon
Pang, Sung-Jun
Year of Publication
2016
Country of Publication
Austria
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Delamination Test
Bending Test
Japanese Larch
Korean Red Pine
Shear Strength
MOE
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 22-25, 2016, Vienna, Austria p. 1931-1938
Summary
To evaluate the mechanical performance of the cross laminated timber (CLT) as the structural board materials using domestic species, the delamination test and the transverse bending test were conducted. The CLT used in the tests consisted of 3 layers of laminated timber made of Japanese larch and Korean red pine. The combinations for lamination were then divided on species of layer and grades of laminae. In the bending test, the loading directions were shown to be parallel and perpendicular to width direction of specimens, which is considered as the applicable direction in wooden building. The result of test showed that the bending strength of larix CLT was higher than that of pine CLT in combination of single species. In case of combination of mixed species, the bending properties CLT using larix major layer was higher than those of pine surface layer. It means that the surface layer has a more influence on bending properties of CLT, than the core layer does.
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Comparisons of Bearing Properties for Various Oriented Glulam Using Digital Image Correlation

https://research.thinkwood.com/en/permalink/catalogue1459
Year of Publication
2018
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Author
Young Jeong, Gi
Kong, Jin Hyuk
Lee, Sang-Joon
Pang, Sung-Jun
Publisher
Springer Japan
Year of Publication
2018
Country of Publication
Japan
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Topic
Mechanical Properties
Keywords
Digital Image Correlation
Orientation
Bearing Strength
Yield Load
Strain Distribution
Failure
Language
English
Research Status
Complete
Series
Journal of Wood Science
ISSN
1611-4663
Summary
The goal of this study was to analyze the bearing properties of the differently oriented glulam using digital image correlation (DIC). Six differently oriented specimens associated with three anatomical directions including longitudinal (L), radial (R), and tangential (T), and 12-mm drift pins were used to analyze the bearing properties, including yield load and bearing strength. The highest bearing strength of 22.57 MPa from RL was found, whereas the lowest bearing strength of 6.47 MPa from LR was found. Different strain distributions were observed from the differently oriented bearing specimens using DIC. Different failure ratios of the differently oriented specimens were highly related to the strain distributions. Although the bearing properties were found to be different between the differently oriented specimens, for the connection design aspect, the bearing properties of glulam could be grouped as RL and TL specimens, RT and TR specimens, and LR and LT specimens.
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End Distance of Single-Shear Screw Connection in Cross Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue2019
Year of Publication
2017
Topic
Connections
Material
CLT (Cross-Laminated Timber)
Author
Oh, Jung-Kwon
Kim, Kwang-Mo
Lee, Jun-Jae
Lee, Hyeon-Jeong
Lee, Sang-Joon
Hong, Jung-Pyo
Kim, Gwang-Chul
Publisher
KoreaScience
Year of Publication
2017
Country of Publication
South Korea
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Connections
Keywords
End Distance
Screws
Language
English
Research Status
Complete
Series
Journal of the Korean Wood Science and Technology
ISSN
2233-7180
Online Access
Free
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Fire Resistance of Timber Framed Floor with Isolated Ceiling Assembly

https://research.thinkwood.com/en/permalink/catalogue685
Year of Publication
2014
Topic
Acoustics and Vibration
Fire
Material
Glulam (Glue-Laminated Timber)
Application
Floors
Ceilings
Author
Park, Joo-Saeng
Lee, Sang-Joon
Yeo, In-Hwan
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Floors
Ceilings
Topic
Acoustics and Vibration
Fire
Keywords
Heavy Impact Sound
Fire Resistance
Sound Insulation
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
Fire resistance test was performed for a floor assembly, of which stiffness was reinforced by shortening the span of floor joists by adding glulam beam in the middle of the original span, and which an additional ceiling component was installed apart from floor part. These factors are expected to show good insulation performance of timber framed floor against heavy impact sound. From full scale fire test, it is conclude that the designed and manufactured floor achieved 1 hour of fire resistance rating.
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Moment Resistance of Post-And-Beam Joints with Concealed Metallic Connectors

https://research.thinkwood.com/en/permalink/catalogue621
Year of Publication
2014
Topic
Connections
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
Humbert, Jérôme
Lee, Sang-Joon
Park, Joo-Saeng
Park, Moon-Jae
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Connections
Mechanical Properties
Keywords
Moment Resistance
Post and Beam
Joints
Metallic Connectors
Monotonic
Reverse Cyclic Loading
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
This paper presents a study on the moment resistance of post-and-beam joints with concealed metallic connectors aimed at replacing in a more modern design the wood-wood joints of traditional Korean Hanok timber houses. Several variations of the design of the connectors are investigated to optimize the moment resistance of the joints. Experimental tests are conducted under monotonic and reversed cyclic loading. The performance of the joint is evaluated in terms of peak moment resistance, as well as ductility and energy dissipation. Results show that optimization in the design can improve the moment resistance of the joint while preventing the brittle wood fracture and favoring a more ductile plasticizing of the connector, for the benefit of safety.
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Shear Behavior of Cross-Laminated Timber Wall Consisting of Small Panels

https://research.thinkwood.com/en/permalink/catalogue1411
Year of Publication
2017
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Author
Oh, Jung-Kwon
Hong, Jung-Pyo
Kim, Chul-Ki
Pang, Sung-Jun
Lee, Sang-Joon
Lee, Jun-Jae
Publisher
Springer Japan
Year of Publication
2017
Country of Publication
Japan
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Topic
Mechanical Properties
Keywords
Kinematic Model
Peak Load
Displacement
Panel-to-Panel
Language
English
Research Status
Complete
Series
Journal of Wood Science
Summary
A cross-laminated timber (CLT) wall plays the role of resisting shear stress induced by lateral forces as well as vertical load. Due to the press size, CLT panels have a limitation in size. To minimize the initial investment, some glulam manufactures wanted to make a shear wall element with small-size CLT panels and panel-to-panel connections and wanted to know whether the shear wall would have equivalent shear performance with the wall made of a single CLT panel. In this study, this was investigated by experiments and kinematic model analysis. Two shear walls made of small CLT panels were tested. The model showed a good agreement with test results in the envelope curve. Even though the shear walls were made of small panels, the global peak load did not decrease significantly compared with the wall made of a single CLT panel, but the global displacement showed a large increase. From this analysis, it was concluded that the shear wall can be designed with small CLT panels, but displacement should be designed carefully.
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Stochastic Model for Predicting the Bending Strength of Glued-Laminated Timber Based on the Knot Area Ratio and Localized MOE in Lamina

https://research.thinkwood.com/en/permalink/catalogue1379
Year of Publication
2018
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Author
Pang, Sung-Jun
Oh, Jung-Kwon
Hong, Jung-Pyo
Lee, Sang-Joon
Lee, Jun-Jae
Publisher
Springer Japan
Year of Publication
2018
Country of Publication
Japan
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Application
Beams
Topic
Mechanical Properties
Keywords
Stochastic Model
Bending Strength
Modulus of Elasticity
Tensile Strength
Knot Area Ratios
Language
English
Research Status
Complete
Series
Journal of Wood Science
ISSN
1611-4663
Summary
The aim of this study was to develop a stochastic model for predicting the bending strength distribution of glued-laminated timber (GLT). The developed model required the localized modulus of elasticity (MOE) and tensile strengths of laminae as input properties. The tensile strength was estimated using a regression model based on the localized MOEs and knot area ratios (KAR) which were experimentally measured for lamina grades samples. The localized MOE was obtained using a machine stress-rated grader, and the localized KAR was determined using an image-processing system. The bending strength distributions in four types of GLTs were simulated using the developed GLT beam model; these four types included: (1) GLT beams without finger joints; (2) GLT beams with finger joints; (3) GLT beams with different lamina sizes; and (4) GLT beams with different combinations of lamina grades. The simulated bending strength distributions were compared with actual test data of 2.4 and 4.8 m-long GLTs. The Kolmogorov–Smirnov goodness-of-fit tests showed that all of the simulated bending strength distributions agreed well with the test data. Especially, good agreement was shown in the fifth percentile point estimate of bending strength with the difference of approximately 1%.
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7 records – page 1 of 1.