Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffness
Autor(a) principal: | |
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Data de Publicação: | 2016 |
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/1822/38277 |
Resumo: | The assessment of existing timber structures requires the determination of the mechanical properties of the individual timber members, which is often obtained by visual grading combined with information of small clear wood specimens. The purpose of this work is to present the results obtained in a multi-scale experimental evaluation of 20 old chestnut (Castanea sativa Mill.) beams, aimed at defining the correlations between bending modulus of elasticity (MOE) in different scales of timber members in combination with visual grading. The results of bending tests, according to EN 408:2010, were statistically analyzed to obtain correlations of bending MOE between and within different scales size. The results of visual inspection according to UNI 11119:2004 regarding the presence and distribution of defects were considered for variation analysis of MOE, evidencing a significant variance between samples of different visual strength grades. Strong correlations within the same phase (coefficient of determination r2 from 0.82 to 0.89) and moderate to high correlations for different phases (r2 from 0.68 to 0.71) were found for bending MOE. Cumulative distribution functions for global MOE remained similar throughout the experimental phases. Moreover, percentage of segments attributed to a specific visual grade is given for each member and compared between scales. |
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Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffnessChestnut beamsModulus of elasticity in bendingVisual gradingProperties correlationBending stiffness variationEngenharia e Tecnologia::Engenharia CivilScience & TechnologyThe assessment of existing timber structures requires the determination of the mechanical properties of the individual timber members, which is often obtained by visual grading combined with information of small clear wood specimens. The purpose of this work is to present the results obtained in a multi-scale experimental evaluation of 20 old chestnut (Castanea sativa Mill.) beams, aimed at defining the correlations between bending modulus of elasticity (MOE) in different scales of timber members in combination with visual grading. The results of bending tests, according to EN 408:2010, were statistically analyzed to obtain correlations of bending MOE between and within different scales size. The results of visual inspection according to UNI 11119:2004 regarding the presence and distribution of defects were considered for variation analysis of MOE, evidencing a significant variance between samples of different visual strength grades. Strong correlations within the same phase (coefficient of determination r2 from 0.82 to 0.89) and moderate to high correlations for different phases (r2 from 0.68 to 0.71) were found for bending MOE. Cumulative distribution functions for global MOE remained similar throughout the experimental phases. Moreover, percentage of segments attributed to a specific visual grade is given for each member and compared between scales.The financial support of the Portuguese Science Foundation (Fundacao para a Ciencia e a Tecnologia, FCT), through PhD Grant SFRH/BD/62326/2009, is gratefully acknowledged. The authors acknowledge also the support of Augusto de Oliveira Ferreira e Companhia Lda. (offer of specimens) and of the Structural Lab from University of Minho (test facilities).Taylor and FrancisUniversidade do MinhoSousa, Hélder S.Branco, Jorge M.Lourenço, Paulo B.20162016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/38277engSousa, H. S., Branco, J. M., & Lourenco, P. B. (2016). Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffness. Journal of Civil Engineering and Management, 22(6), 728-738. doi: 10.3846/13923730.2014.9140831822-360510.3846/13923730.2014.914083This is an Accepted Manuscript of an article published by Taylor & Francis in the Journal of Civil Engineering and Management on 02/09/2015 (published online), available online: http://www.tandfonline.com/doi/abs/10.3846/13923730.2014.914083info: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:RCAAP2023-07-21T12:10:07Zoai:repositorium.sdum.uminho.pt:1822/38277Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:01:40.014550Repositório 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 |
Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffness |
title |
Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffness |
spellingShingle |
Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffness Sousa, Hélder S. Chestnut beams Modulus of elasticity in bending Visual grading Properties correlation Bending stiffness variation Engenharia e Tecnologia::Engenharia Civil Science & Technology |
title_short |
Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffness |
title_full |
Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffness |
title_fullStr |
Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffness |
title_full_unstemmed |
Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffness |
title_sort |
Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffness |
author |
Sousa, Hélder S. |
author_facet |
Sousa, Hélder S. Branco, Jorge M. Lourenço, Paulo B. |
author_role |
author |
author2 |
Branco, Jorge M. Lourenço, Paulo B. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Sousa, Hélder S. Branco, Jorge M. Lourenço, Paulo B. |
dc.subject.por.fl_str_mv |
Chestnut beams Modulus of elasticity in bending Visual grading Properties correlation Bending stiffness variation Engenharia e Tecnologia::Engenharia Civil Science & Technology |
topic |
Chestnut beams Modulus of elasticity in bending Visual grading Properties correlation Bending stiffness variation Engenharia e Tecnologia::Engenharia Civil Science & Technology |
description |
The assessment of existing timber structures requires the determination of the mechanical properties of the individual timber members, which is often obtained by visual grading combined with information of small clear wood specimens. The purpose of this work is to present the results obtained in a multi-scale experimental evaluation of 20 old chestnut (Castanea sativa Mill.) beams, aimed at defining the correlations between bending modulus of elasticity (MOE) in different scales of timber members in combination with visual grading. The results of bending tests, according to EN 408:2010, were statistically analyzed to obtain correlations of bending MOE between and within different scales size. The results of visual inspection according to UNI 11119:2004 regarding the presence and distribution of defects were considered for variation analysis of MOE, evidencing a significant variance between samples of different visual strength grades. Strong correlations within the same phase (coefficient of determination r2 from 0.82 to 0.89) and moderate to high correlations for different phases (r2 from 0.68 to 0.71) were found for bending MOE. Cumulative distribution functions for global MOE remained similar throughout the experimental phases. Moreover, percentage of segments attributed to a specific visual grade is given for each member and compared between scales. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016 2016-01-01T00:00:00Z |
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/1822/38277 |
url |
http://hdl.handle.net/1822/38277 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Sousa, H. S., Branco, J. M., & Lourenco, P. B. (2016). Use of bending tests and visual inspection for multi-scale experimental evaluation of chestnut timber beams stiffness. Journal of Civil Engineering and Management, 22(6), 728-738. doi: 10.3846/13923730.2014.914083 1822-3605 10.3846/13923730.2014.914083 This is an Accepted Manuscript of an article published by Taylor & Francis in the Journal of Civil Engineering and Management on 02/09/2015 (published online), available online: http://www.tandfonline.com/doi/abs/10.3846/13923730.2014.914083 |
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 |
Taylor and Francis |
publisher.none.fl_str_mv |
Taylor and Francis |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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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 |
repository.mail.fl_str_mv |
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1799132415580438528 |