Characterization of the mechanical performance in compression perpendicular to the grain of insect-deteriorated timber
Autor(a) principal: | |
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Data de Publicação: | 2020 |
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/1822/64316 |
Resumo: | Among biological agents, insect attacks may cause severe degradation of timber structures in the service life of buildings which leads to lower mechanical performance and, thus, maintenance problems over time. Additionally, compression perpendicular to the grain always features a weak spot with respect to the long-term mechanical performance of timber members and joints. In the present work, the respective strength and elastic modulus were thus investigated for insect deteriorated wood. Following a standardized geometry, small samples degraded by anobiids were extracted from beams made of sweet chestnut wood (<i>Castanea sativa</i> Mill.) that were removed from service. Visual assessment of the external wood surfaces was then performed to identify areas infested by insects. Afterwards, destructive monotonic compression tests were carried out perpendicularly to the grain on the damaged area to determine the loss of compressive strength and elastic modulus. The experimental results showed that the loss of compressive strength and elastic modulus might be linearly correlated to the wood density loss for small samples infested by insects. Nonetheless, future work should focus on determining accurately the density loss in the insect-deteriorated part through non- or semi-destructive tests, in order to establish stronger relationships with the mechanical properties loss investigated. |
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Characterization of the mechanical performance in compression perpendicular to the grain of insect-deteriorated timbertimberinsect wood deteriorationcompressiondestructive testsScience & TechnologyAmong biological agents, insect attacks may cause severe degradation of timber structures in the service life of buildings which leads to lower mechanical performance and, thus, maintenance problems over time. Additionally, compression perpendicular to the grain always features a weak spot with respect to the long-term mechanical performance of timber members and joints. In the present work, the respective strength and elastic modulus were thus investigated for insect deteriorated wood. Following a standardized geometry, small samples degraded by anobiids were extracted from beams made of sweet chestnut wood (<i>Castanea sativa</i> Mill.) that were removed from service. Visual assessment of the external wood surfaces was then performed to identify areas infested by insects. Afterwards, destructive monotonic compression tests were carried out perpendicularly to the grain on the damaged area to determine the loss of compressive strength and elastic modulus. The experimental results showed that the loss of compressive strength and elastic modulus might be linearly correlated to the wood density loss for small samples infested by insects. Nonetheless, future work should focus on determining accurately the density loss in the insect-deteriorated part through non- or semi-destructive tests, in order to establish stronger relationships with the mechanical properties loss investigated.This work was financed by the European Regional Development Fund (FEDER) through theCompetitively Factors Operational Programme (COMPETE) and by national funds through the Foundation forScience and Technology (FCT) within the scope of research projects INVISIBLE WOODS PTDC/EPH-PAT/2401/2014 and PROTIMBER PTDC/ECM-EST/1072/2014, respectively, and the PhD Scholarships SFRH/BD/128580/2017.Multidisciplinary Digital Publishing InstituteUniversidade do MinhoVerbist, Maxime Paul AugustinBranco, Jorge M.Nunes, Lina2020-01-192020-01-19T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/64316engVerbist, M.; Branco, J.M.; Nunes, L. Characterization of the Mechanical Performance in Compression Perpendicular to the Grain of Insect-Deteriorated Timber. Buildings 2020, 10, 14.10.3390/buildings10010014https://www.mdpi.com/2075-5309/10/1/14info: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:RCAAP2023-07-21T12:45:08Zoai:repositorium.sdum.uminho.pt:1822/64316Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:42:55.776675Repositório 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 |
Characterization of the mechanical performance in compression perpendicular to the grain of insect-deteriorated timber |
title |
Characterization of the mechanical performance in compression perpendicular to the grain of insect-deteriorated timber |
spellingShingle |
Characterization of the mechanical performance in compression perpendicular to the grain of insect-deteriorated timber Verbist, Maxime Paul Augustin timber insect wood deterioration compression destructive tests Science & Technology |
title_short |
Characterization of the mechanical performance in compression perpendicular to the grain of insect-deteriorated timber |
title_full |
Characterization of the mechanical performance in compression perpendicular to the grain of insect-deteriorated timber |
title_fullStr |
Characterization of the mechanical performance in compression perpendicular to the grain of insect-deteriorated timber |
title_full_unstemmed |
Characterization of the mechanical performance in compression perpendicular to the grain of insect-deteriorated timber |
title_sort |
Characterization of the mechanical performance in compression perpendicular to the grain of insect-deteriorated timber |
author |
Verbist, Maxime Paul Augustin |
author_facet |
Verbist, Maxime Paul Augustin Branco, Jorge M. Nunes, Lina |
author_role |
author |
author2 |
Branco, Jorge M. Nunes, Lina |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Verbist, Maxime Paul Augustin Branco, Jorge M. Nunes, Lina |
dc.subject.por.fl_str_mv |
timber insect wood deterioration compression destructive tests Science & Technology |
topic |
timber insect wood deterioration compression destructive tests Science & Technology |
description |
Among biological agents, insect attacks may cause severe degradation of timber structures in the service life of buildings which leads to lower mechanical performance and, thus, maintenance problems over time. Additionally, compression perpendicular to the grain always features a weak spot with respect to the long-term mechanical performance of timber members and joints. In the present work, the respective strength and elastic modulus were thus investigated for insect deteriorated wood. Following a standardized geometry, small samples degraded by anobiids were extracted from beams made of sweet chestnut wood (<i>Castanea sativa</i> Mill.) that were removed from service. Visual assessment of the external wood surfaces was then performed to identify areas infested by insects. Afterwards, destructive monotonic compression tests were carried out perpendicularly to the grain on the damaged area to determine the loss of compressive strength and elastic modulus. The experimental results showed that the loss of compressive strength and elastic modulus might be linearly correlated to the wood density loss for small samples infested by insects. Nonetheless, future work should focus on determining accurately the density loss in the insect-deteriorated part through non- or semi-destructive tests, in order to establish stronger relationships with the mechanical properties loss investigated. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-19 2020-01-19T00:00:00Z |
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/1822/64316 |
url |
http://hdl.handle.net/1822/64316 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Verbist, M.; Branco, J.M.; Nunes, L. Characterization of the Mechanical Performance in Compression Perpendicular to the Grain of Insect-Deteriorated Timber. Buildings 2020, 10, 14. 10.3390/buildings10010014 https://www.mdpi.com/2075-5309/10/1/14 |
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 |
Multidisciplinary Digital Publishing Institute |
publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute |
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 |
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 |
repository.mail.fl_str_mv |
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1799132984187551744 |