Long-term bending properties of cross-laminated timber made from Japanese larch under constant environment

Abstract Cross-laminated timber (CLT) has been used extensively in timber construction. CLT panels are typically used in roofs and floors that carry a continuous load, and it is important to examine the long-term loading capacity of CLT. However, studies that focus on the long-term loading capacity...

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Autores principales:	Ryuya Takanashi, Yoshinori Ohashi, Wataru Ishihara, Kazushige Matsumoto
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Creep Creep rupture Duration of load Out-of-plane bending Survival analysis Forestry SD1-669.5 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/73181044b24143b4ab29a0d0e1063f69
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spelling	oai:doaj.org-article:73181044b24143b4ab29a0d0e1063f692021-11-28T12:29:04ZLong-term bending properties of cross-laminated timber made from Japanese larch under constant environment10.1186/s10086-021-01997-11435-02111611-4663https://doaj.org/article/73181044b24143b4ab29a0d0e1063f692021-11-01T00:00:00Zhttps://doi.org/10.1186/s10086-021-01997-1https://doaj.org/toc/1435-0211https://doaj.org/toc/1611-4663Abstract Cross-laminated timber (CLT) has been used extensively in timber construction. CLT panels are typically used in roofs and floors that carry a continuous load, and it is important to examine the long-term loading capacity of CLT. However, studies that focus on the long-term loading capacity of CLT are limited. To this end, we conducted long-term out-of-plane bending tests on seven-layer CLT made from Japanese larch (Larix kaempferi) under constant environmental conditions, investigated creep performance and duration of load, and experimentally analyzed creep rupture behavior. The mean estimated relative creep after 50 years was 1.49. The sample showed a satisfactory resistance to creep as a building material. The duration of load of most of the specimens in this study was shorter than the conventional value of small clear wood specimens. Specimens had a lower duration of load capacity than solid lumber. According to the results of survival analysis, a loading level of 70% or more caused the initial failure of specimens. Creep rupture of most of the specimens occurred at less deflection than displacement at failure in the short-term loading test. Additional studies focusing on the effects of finger joints, transverse layers, and width of a specimen on creep rupture behavior are suggested.Ryuya TakanashiYoshinori OhashiWataru IshiharaKazushige MatsumotoSpringerOpenarticleCreepCreep ruptureDuration of loadOut-of-plane bendingSurvival analysisForestrySD1-669.5Building constructionTH1-9745ENJournal of Wood Science, Vol 67, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Creep Creep rupture Duration of load Out-of-plane bending Survival analysis Forestry SD1-669.5 Building construction TH1-9745
spellingShingle	Creep Creep rupture Duration of load Out-of-plane bending Survival analysis Forestry SD1-669.5 Building construction TH1-9745 Ryuya Takanashi Yoshinori Ohashi Wataru Ishihara Kazushige Matsumoto Long-term bending properties of cross-laminated timber made from Japanese larch under constant environment
description	Abstract Cross-laminated timber (CLT) has been used extensively in timber construction. CLT panels are typically used in roofs and floors that carry a continuous load, and it is important to examine the long-term loading capacity of CLT. However, studies that focus on the long-term loading capacity of CLT are limited. To this end, we conducted long-term out-of-plane bending tests on seven-layer CLT made from Japanese larch (Larix kaempferi) under constant environmental conditions, investigated creep performance and duration of load, and experimentally analyzed creep rupture behavior. The mean estimated relative creep after 50 years was 1.49. The sample showed a satisfactory resistance to creep as a building material. The duration of load of most of the specimens in this study was shorter than the conventional value of small clear wood specimens. Specimens had a lower duration of load capacity than solid lumber. According to the results of survival analysis, a loading level of 70% or more caused the initial failure of specimens. Creep rupture of most of the specimens occurred at less deflection than displacement at failure in the short-term loading test. Additional studies focusing on the effects of finger joints, transverse layers, and width of a specimen on creep rupture behavior are suggested.
format	article
author	Ryuya Takanashi Yoshinori Ohashi Wataru Ishihara Kazushige Matsumoto
author_facet	Ryuya Takanashi Yoshinori Ohashi Wataru Ishihara Kazushige Matsumoto
author_sort	Ryuya Takanashi
title	Long-term bending properties of cross-laminated timber made from Japanese larch under constant environment
title_short	Long-term bending properties of cross-laminated timber made from Japanese larch under constant environment
title_full	Long-term bending properties of cross-laminated timber made from Japanese larch under constant environment
title_fullStr	Long-term bending properties of cross-laminated timber made from Japanese larch under constant environment
title_full_unstemmed	Long-term bending properties of cross-laminated timber made from Japanese larch under constant environment
title_sort	long-term bending properties of cross-laminated timber made from japanese larch under constant environment
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/73181044b24143b4ab29a0d0e1063f69
work_keys_str_mv	AT ryuyatakanashi longtermbendingpropertiesofcrosslaminatedtimbermadefromjapaneselarchunderconstantenvironment AT yoshinoriohashi longtermbendingpropertiesofcrosslaminatedtimbermadefromjapaneselarchunderconstantenvironment AT wataruishihara longtermbendingpropertiesofcrosslaminatedtimbermadefromjapaneselarchunderconstantenvironment AT kazushigematsumoto longtermbendingpropertiesofcrosslaminatedtimbermadefromjapaneselarchunderconstantenvironment
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Long-term bending properties of cross-laminated timber made from Japanese larch under constant environment

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