Skip header and navigation

6 records – page 1 of 1.

Effects of Component Ratio of the Face and Core Laminae on Static Bending Strenght Performance of Three-Ply Cross-Laminated Wood Panels with Sugi (Cryptomeria Japonica)

https://research.thinkwood.com/en/permalink/catalogue1468
Year of Publication
2006
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Park, Han-Min
Fushitani, Masami
Publisher
Society of Wood Science and Technology
Year of Publication
2006
Country of Publication
United States
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Sugi
Lamina Thickness
Modulus of Elasticity
Modulus of Rupture
Proportional Limit Stress
Bending Strength
Language
English
Research Status
Complete
Series
Wood and Fiber Science
Summary
In order to improve the bending strength performance of three-ply laminated wood panels and use them as construction-grade panel materials, twelve types of three-ply cross-laminated wood panels whose percentages of core lamina thickness versus total lamina thickness were 33%, 50%, and 80% were made with sugi (Japanese cedar), and the effect of component ratio of the face and core laminae on their static bending strength performance was investigated. The moduli of elasticity (MOE), proportional limit stresses and moduli of rupture (MOR), perpendicular (C type) and parallel (C type) to the grain of face laminae markedly increased or decreased with increasing percentage of core lamina thickness. The percentages of core lamina thickness at which each strength property value of C type became equal to that of C type ranged from 65% to 80%. At each percentage of core lamina thickness, the MOE and proportional limit stress of C type were higher in C (45) specimens having perpendicular-direction lamina of 45° annual ring angle in the core than in C (90) specimens having perpendicular-direction lamina of 90° in the core, whereas there was little difference in MOR between C (45) specimens and C (90) specimens. For 45° specimens having the core lamina thickness from 60% to 70%, MOE as well as MOR parallel and perpendicular to the grain of face laminae exceeded the corresponding requirement values of structural plywood with 21.0-mm thickness specified in Japanese Agricultural Standards.
Online Access
Free
Resource Link
Less detail

Recent Research and Development on Sugi (Japanese Cedar) Structural Glued Laminated Timber

https://research.thinkwood.com/en/permalink/catalogue2100
Year of Publication
2015
Topic
Mechanical Properties
Material
Glulam (Glue-Laminated Timber)
Author
Hayashi, Tomoyuki
Miyatake, Atsushi
Publisher
SpringerOpen
Year of Publication
2015
Country of Publication
United Kingdom
Format
Journal Article
Material
Glulam (Glue-Laminated Timber)
Topic
Mechanical Properties
Keywords
Sugi
Japan
Japanese Agricultural Standard
Language
English
Research Status
Complete
Series
Journal of Wood Science
Online Access
Free
Resource Link
Less detail

A Seismic Design of 3-Story Building Using Japanese "Sugi" CLT Panels

https://research.thinkwood.com/en/permalink/catalogue682
Year of Publication
2014
Topic
Design and Systems
Seismic
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Author
Matsumoto, Kazuyuki
Miyake, Tatsuya
Haramiishi, Takeshi
Tsuchimoto, Takahiro
Isoda, Hiroshi
Kawai, Naohito
Yasumura, Motoi
Year of Publication
2014
Country of Publication
Canada
Format
Conference Paper
Material
CLT (Cross-Laminated Timber)
Application
Wood Building Systems
Topic
Design and Systems
Seismic
Keywords
Panels
Sugi
Japan
Dynamic Analysis
Language
English
Conference
World Conference on Timber Engineering
Research Status
Complete
Notes
August 10-14, 2014, Quebec City, Canada
Summary
In this paper, the general process and results of the seismic design on a 3-story building with Japanese Sugi CLT construction based on the time history response analysis as the only legal structural design method in Japan at the present moment, are shown. As a result, it is recognized that the building has enough seismic performance for the regulation of seismic design in Japan
Online Access
Free
Resource Link
Less detail

Strength Properties of CLT Composed of Sugi Laminations: (5) In-Plane Bending Strength

https://research.thinkwood.com/en/permalink/catalogue987
Year of Publication
2013
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Hiramatsu, Yasushi
Miyattaki, Atsushi
Shinto, Kenta
Watanabe, Hiroshi
Organization
Architectural Institute of Japan
Year of Publication
2013
Country of Publication
Japan
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Bending Strength
Sugi
Language
Japanese
Research Status
Complete
Summary
Cross-laminated timber (CLT) has recently emerged as a new wood product that utilizes a large quantity of domestic lumber. This study aims to analyze the effects of width and lay-ups on the tensile strength of CLT. To this end, the elastic modulus of sugi CLT with different lay-ups was measured by dynamic and static methods. Moreover, tensile tests were conducted for different widths and lay-ups of CLT. Results indicate that the apparent bending Young’s modulus, as calculated using the dynamic method, is directly proportional to the measured Young’s modulus in static method for each lay-up. Furthermore, there was no significant effect of width on the tensile strength in the range of 150, 300, and 600 mm. However, the variations in lay-ups affected the tensile strength as follows: CLT with larger ratio of the major strength direction lamina along the cross-section and with higher grade of lamina in the major strength direction showed higher tensile strength. The estimated tensile strength of CLT, as calculated using the Young’s modulus of the lamina of each layer, and the tensile strength of lamina as simple substance was found to be in good agreement with the measured tensile strength of CLT.
Online Access
Free
Resource Link
Less detail

Strength Properties of CLT Composed of Sugi Laminations : (6) Compression Parallel to the Grain and Compression Perpendicular to the Grain

https://research.thinkwood.com/en/permalink/catalogue986
Year of Publication
2013
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Author
Ido, Hirofumi
Sugimoto, Kenichi
Nagao, Hirobumi
Miyattaki, Atsushi
Watanabe, Hiroshi
Organization
Architectural Institute of Japan
Year of Publication
2013
Country of Publication
Japan
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Topic
Mechanical Properties
Keywords
Sugi
Compression
Language
Japanese
Research Status
Complete
Summary
As timber tends to be weak against the load perpendicular to grains, it can be important to study the consequences of applying loads perpendicular to larch cross-laminated (CLT) composed of multiple larch laminae. Compressions tests were conducted perpendicular to the in-plane and out-of-plane grains of Japanese larch CLT. Out-of-pane average compressive strenth, average yield strength, and average compressive stiffness perpendicular to the grain of the larch CLT were 11.94 N.mm2, 7.30 N/mm2, and 7.30 N/mm2, respectively, whereas the in-plane average compressive strength, average yield strength, and average compressive stiffness perpendicular to the grain of the CLT larch were 21.48 N/mm2, 21.18 N/mm2, and 18.72 N/mm2, respectively. The in-plane compressive strength and yield strength showed a statistically significant relationship with the density fo the CLT, the modulus of elasticity measured by longitudinal vibration (MOElv), and the average MOElv of the laminae constructing the cross-laminated timber. The in-plane yield strength was affected by the MOWlv of the outer laminae and the average MOElv of the larch cross-laminated timber. The compressive strength properties were most affected by the loading surface of the CLT. The variation between the moisture content and compressive strength properties of the CLT, however, was not statistically significant.
Online Access
Free
Resource Link
Less detail

Strength Properties of CLT Composed of Sugi Laminations : (9) Small Scale CLT Shear Wall

https://research.thinkwood.com/en/permalink/catalogue984
Year of Publication
2013
Topic
Mechanical Properties
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Author
Watanabe, Hiroshi
Araki, Yasuhiro
Nakajima, Shiro
Miyattaki, Atsushi
Yasumura, Motoi
Ando, Naoto
Kaiko, Naoto
Organization
Architectural Institute of Japan
Year of Publication
2013
Country of Publication
Japan
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Shear Walls
Topic
Mechanical Properties
Keywords
In-Plane Shear Force
Strength Properties
Sugi
Language
Japanese
Research Status
Complete
Summary
An investigation was carried out on CLT panels made from Sitka spruce in order to establish the effect of the thickness of CLT panels on the bending stiffness and strength and the rolling shear. Bending and shear tests on 3-layer and 5-layer panels were performed with loading in the out-of-plane and in-plane directions. ‘Global’ stiffness measurements were found to correlate well with theoretical values. Based on the results, there was a general tendency that both the bending strength and rolling shear decreased with panel thickness. Mean values for rolling shear ranged from 1.0 N/mm2 to 2.0 N/mm2.
Online Access
Free
Resource Link
Less detail

6 records – page 1 of 1.