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＜departmental bulletin paper＞
Cross-sectional Design of Glued Laminated Lumber Composed of Low-Grade Lumber from Sugi (Cryptomeria japonica) Thinning, Increase and Uniformity of Modulus of Elasticity

Creator
Creator Name
原野, 真由美
Harano, Mayumi
Affiliation
Affiliation Name
九州大学農学部木材工学講座
Department of Forest Products, Facu!ty of Agriculture, Kyushu University
Author PID
L001280
Creator Name
河辺, 純一
Kawabe, Jun-ichi
Affiliation
Affiliation Name
九州大学農学部木材工学講座
Department of Forest Products, Facu!ty of Agriculture, Kyushu University
Author PID
L002366
Creator Name
又木, 義博
Mataki, Yoshihiro
Affiliation
Affiliation Name
九州大学農学部木材工学講座
Department of Forest Products, Facu!ty of Agriculture, Kyushu University
Language
Japanese
Publisher
九州大學農學部
Faculty of Agriculture, Kyushu University
Date
1993-03
Source Title
Science bulletin of the Faculty of Agriculture, Kyushu University
Vol
47
Issue
3/4
First Page
223
Last Page
229
Publication Type
Version of Record
Access Rights
open access
JaLC DOI
https://doi.org/10.15017/23446
Related DOI
九州大學農學部學藝雜誌 || 47(3/4) || p223-229
Science bulletin of the Faculty of Agriculture, Kyushu University || 47(3/4) || p223-229
http://www.agr.kyushu-u.ac.jp/
Related URI
九州大學農學部學藝雜誌 || 47(3/4) || p223-229
Science bulletin of the Faculty of Agriculture, Kyushu University || 47(3/4) || p223-229
http://www.agr.kyushu-u.ac.jp/
Relation
九州大學農學部學藝雜誌 || 47(3/4) || p223-229
Science bulletin of the Faculty of Agriculture, Kyushu University || 47(3/4) || p223-229
http://www.agr.kyushu-u.ac.jp/

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Details

Record ID
23446
Peer-Reviewed
Unrefereed
Subject Terms
スギ
低質
間伐材
サンドイッチ構造
集成材
弾性係数
Sugi (Cryptomeria japonica)
low grade
thinnings
sandwich construction
glued laminated timber
modulus of elasticity
ISSN
0368-6264
NCID
AN0005519X
Notes
The utilization of low-grade thinning log of young sugi (Cryptomeria japonica) is recently one of the important subject for a future study. In this investigation, various types of laminated lumber of sandwich construction were designed by using the low-grade Sugi lumbers from thinning log as core lamina and the high-grade Sugi and Hinoki (Chamecyparis obtusa) from mature log and the high-quality Matoa (Pometia pinnata) from tropical forest as face lamina, in order to utilize the juvenile and knoty lumber of Sugi from thinning log, having low modulus of elasticity (MOE) which vary largely over the length of lumber. In the case of the core ratio of less than 0.5 to the whole depth of laminated lumber, the modulus of elasticity of laminated lumber could be high quality guaranteed and evenly localized over the length of laminated lumber.
スギ間伐材の有効利用には多くの提案とその対策がなされているが, 未だ多くの技術的課題が残されている. 多節で未成熟な若齢のスギ間伐材からの製材ラミナは弾性係数がかなり低く, しかもそれが材長方向に著しく変動する. この研究では, そのような低質スギ間伐材からの小割材を芯ラミナとし, 良質スギ, ヒノキおよびマトアを表ラミナとして構成したサンドイツチ構造集成材の強度設計について実験的に検討した. その結果, 芯ラミナ構成比0.5以下においてはMOEの増大を確実に図ることができ, また, 芯ラミナよりMOEの材長方向変動係数が小さい表ラミナでそれらを構成することによって, 芯ラミナのもつ著しいMOEの変動の発現を抑え, 材長方向に均等な高い弾性係数をもつ集成材が得られることが明らかになった.
Created Date 2012.08.02
Modified Date 2022.11.11

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