Strain variation analysis of cross-laminated timber elements under cyclic moisture
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/75402 |
Resumo: | Despite the growing use of cross-laminated timber (CLT) panels in the construction industry, their behaviours under weather conditions, especially cyclic moisture which generated additional strains, requires further investigation. To address this gap, an extensive experimental campaign was carried out to evaluate CLT elements, in which strains are measured, under cyclic moisture changes, using Digital Image Correlation (DIC). In this way, the effects of cyclic humidity changes on amplitude and distribution of strains on four different configurations of CLT panels, divided based on the free flow direction of moisture, are explained. Regarding RH cycle tests, CLT specimens were conditioned in climatic chambers for 324 days at constant temperature 20 (degrees C) with a humidity cycle varying every 21 days between 30% and 90%, getting constant at 65% after the first 142 days. Results show that, in the main face, drying periods present tensile strain while wetting periods present compressive strains in the longitudinal direction. But, in the tangential direction, restrained strains tend to reduce significantly from first to last drying cycles for all test configurations. Moreover, in the lateral face, drying periods present tensile strains while wetting periods present compressive strains in the tangential direction. Experimental results confirmed that the ratio between tangential and longitudinal directions tends to decrease with the number of RH cycles, and successive RH cycles do not cause cumulative strains on CLT panels. |
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Strain variation analysis of cross-laminated timber elements under cyclic moistureCross laminated timberMoisture contentRelative humidityDigital image correlationEngenharia e Tecnologia::Engenharia CivilScience & TechnologyDespite the growing use of cross-laminated timber (CLT) panels in the construction industry, their behaviours under weather conditions, especially cyclic moisture which generated additional strains, requires further investigation. To address this gap, an extensive experimental campaign was carried out to evaluate CLT elements, in which strains are measured, under cyclic moisture changes, using Digital Image Correlation (DIC). In this way, the effects of cyclic humidity changes on amplitude and distribution of strains on four different configurations of CLT panels, divided based on the free flow direction of moisture, are explained. Regarding RH cycle tests, CLT specimens were conditioned in climatic chambers for 324 days at constant temperature 20 (degrees C) with a humidity cycle varying every 21 days between 30% and 90%, getting constant at 65% after the first 142 days. Results show that, in the main face, drying periods present tensile strain while wetting periods present compressive strains in the longitudinal direction. But, in the tangential direction, restrained strains tend to reduce significantly from first to last drying cycles for all test configurations. Moreover, in the lateral face, drying periods present tensile strains while wetting periods present compressive strains in the tangential direction. Experimental results confirmed that the ratio between tangential and longitudinal directions tends to decrease with the number of RH cycles, and successive RH cycles do not cause cumulative strains on CLT panels.The financial support of the Portuguese Science Foundation (Fundação de Ciência e Tecnologia, FCT), through PhD grant SFRH/BD/79972/2011 is gratefully acknowledged.ElsevierUniversidade do MinhoSilva, CatarinaBranco, Jorge M.Mehdipour, ZabihXavier, JoseReboucas, Arthur S.Lourenço, Paulo B.2021-09-012021-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/75402engSilva, C., Branco, J. M., Mehdipour, Z., Xavier, J., Rebouças, A. S., & Lourenço, P. B. (2021). Strain variation analysis of cross-laminated timber elements under cyclic moisture. Journal of Building Engineering, 41, 102373.2352-71022352-710210.1016/j.jobe.2021.102373https://www.sciencedirect.com/science/article/pii/S2352710221002291info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:00:25Zoai:repositorium.sdum.uminho.pt:1822/75402Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:50:19.032018Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Strain variation analysis of cross-laminated timber elements under cyclic moisture |
title |
Strain variation analysis of cross-laminated timber elements under cyclic moisture |
spellingShingle |
Strain variation analysis of cross-laminated timber elements under cyclic moisture Silva, Catarina Cross laminated timber Moisture content Relative humidity Digital image correlation Engenharia e Tecnologia::Engenharia Civil Science & Technology |
title_short |
Strain variation analysis of cross-laminated timber elements under cyclic moisture |
title_full |
Strain variation analysis of cross-laminated timber elements under cyclic moisture |
title_fullStr |
Strain variation analysis of cross-laminated timber elements under cyclic moisture |
title_full_unstemmed |
Strain variation analysis of cross-laminated timber elements under cyclic moisture |
title_sort |
Strain variation analysis of cross-laminated timber elements under cyclic moisture |
author |
Silva, Catarina |
author_facet |
Silva, Catarina Branco, Jorge M. Mehdipour, Zabih Xavier, Jose Reboucas, Arthur S. Lourenço, Paulo B. |
author_role |
author |
author2 |
Branco, Jorge M. Mehdipour, Zabih Xavier, Jose Reboucas, Arthur S. Lourenço, Paulo B. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Silva, Catarina Branco, Jorge M. Mehdipour, Zabih Xavier, Jose Reboucas, Arthur S. Lourenço, Paulo B. |
dc.subject.por.fl_str_mv |
Cross laminated timber Moisture content Relative humidity Digital image correlation Engenharia e Tecnologia::Engenharia Civil Science & Technology |
topic |
Cross laminated timber Moisture content Relative humidity Digital image correlation Engenharia e Tecnologia::Engenharia Civil Science & Technology |
description |
Despite the growing use of cross-laminated timber (CLT) panels in the construction industry, their behaviours under weather conditions, especially cyclic moisture which generated additional strains, requires further investigation. To address this gap, an extensive experimental campaign was carried out to evaluate CLT elements, in which strains are measured, under cyclic moisture changes, using Digital Image Correlation (DIC). In this way, the effects of cyclic humidity changes on amplitude and distribution of strains on four different configurations of CLT panels, divided based on the free flow direction of moisture, are explained. Regarding RH cycle tests, CLT specimens were conditioned in climatic chambers for 324 days at constant temperature 20 (degrees C) with a humidity cycle varying every 21 days between 30% and 90%, getting constant at 65% after the first 142 days. Results show that, in the main face, drying periods present tensile strain while wetting periods present compressive strains in the longitudinal direction. But, in the tangential direction, restrained strains tend to reduce significantly from first to last drying cycles for all test configurations. Moreover, in the lateral face, drying periods present tensile strains while wetting periods present compressive strains in the tangential direction. Experimental results confirmed that the ratio between tangential and longitudinal directions tends to decrease with the number of RH cycles, and successive RH cycles do not cause cumulative strains on CLT panels. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-09-01 2021-09-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/75402 |
url |
http://hdl.handle.net/1822/75402 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Silva, C., Branco, J. M., Mehdipour, Z., Xavier, J., Rebouças, A. S., & Lourenço, P. B. (2021). Strain variation analysis of cross-laminated timber elements under cyclic moisture. Journal of Building Engineering, 41, 102373. 2352-7102 2352-7102 10.1016/j.jobe.2021.102373 https://www.sciencedirect.com/science/article/pii/S2352710221002291 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799132271684354048 |