Influence of moisture content on the dynamic modulus of elasticity
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Research, Society and Development |
Texto Completo: | https://rsdjournal.org/index.php/rsd/article/view/33687 |
Resumo: | Pinus forests are the second most planted in Brazil and the wood obtained from them is mainly used as structural elements in the civil construction sector. The Brazilian standard that deals with calculations of wooden structures projects recommends the use of wood in the range of 10% to 20% of moisture content. Thus, this study aimed to present an investigation about the influence of moisture content on the static modulus of elasticity (MOEst) of wooden beams by transverse vibration tests. The MOEst was evaluated by static bending tests and transverse vibration tests for various moisture content. The transverse vibration test was performed in a free condition using an accelerometer and an impulse hammer, and the dynamic modulus of elasticity (MOEd) was determined from the frequency of the first bending vibration mode. A total of 20 wooden beams were obtained from freshly cut Pinus spp. logs with initial high moisture content were used, with nominal dimensions of 5 cm × 10 cm × 200 cm (thickness × width × length). It was observed that the MOEd is also affected by moisture content according to the non-linear regression model. There were significant changes in the dynamic modulus of elasticity (MOEd) for the moisture contents (M) below 25% (near the fiber saturation point - FSP). |
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Influence of moisture content on the dynamic modulus of elasticityInfluencia del contenido de humedad en el módulo dinámico de elasticidadInfluência do teor de umidade no módulo de elasticidade dinâmicoEnsayo de flexiónEnsayo no destructivoMadera de Pinus spp.FrecuenciaSaturación de fibras.Bending testNon-destructive testPinus spp. woodFrequencyFiber saturation.Ensaio de flexãoEnsaio não destrutivoMadeira de Pinus spp.FrequênciaSaturação das fibras.Pinus forests are the second most planted in Brazil and the wood obtained from them is mainly used as structural elements in the civil construction sector. The Brazilian standard that deals with calculations of wooden structures projects recommends the use of wood in the range of 10% to 20% of moisture content. Thus, this study aimed to present an investigation about the influence of moisture content on the static modulus of elasticity (MOEst) of wooden beams by transverse vibration tests. The MOEst was evaluated by static bending tests and transverse vibration tests for various moisture content. The transverse vibration test was performed in a free condition using an accelerometer and an impulse hammer, and the dynamic modulus of elasticity (MOEd) was determined from the frequency of the first bending vibration mode. A total of 20 wooden beams were obtained from freshly cut Pinus spp. logs with initial high moisture content were used, with nominal dimensions of 5 cm × 10 cm × 200 cm (thickness × width × length). It was observed that the MOEd is also affected by moisture content according to the non-linear regression model. There were significant changes in the dynamic modulus of elasticity (MOEd) for the moisture contents (M) below 25% (near the fiber saturation point - FSP).Las plantaciones de pino ocupan gran parte del sector forestal en Brasil, entre los principales usos de la madera los elementos estructurales constituyen una fuente fundamental para el sector de la construcción civil. La norma brasileña para fines estructurales recomienda el uso de madera entre 10% a 20% de contenido de humedad. En este sentido, el objetivo del presente estudio fue evaluar la influencia del contenido de humedad en el módulo de elasticidad estático (MOEst) de vigas de madera mediante ensayos de vibración transversal. El ensayo se evaluó mediante pruebas de flexión estática y pruebas de vibración transversal para varios contenidos de humedad. La prueba de vibración transversal y análisis modal estructural se realizó en condiciones libres utilizando un acelerómetro y un martillo de impulso, y el módulo dinámico de elasticidad se determinó a partir de la frecuencia de vibración de flexión. Fueron evaluadas un total de 20 vigas de madera de Pinus spp., con dimensiones nominales de 5 cm × 10 cm × 200 cm (espesor × ancho × largo) y con alto contenido de humedad inicial. Los parámetros estadísticos revelan que el módulo de elasticidad estático fue afectado por el contenido de humedad. Hubo cambios significativos en el módulo dinámico de elasticidad para los contenidos de humedad (M) por debajo del 25% (cerca del punto de saturación de la fibra - FSP).As florestas de pinus são as segundas mais plantadas no Brasil e sua madeira é utilizada principalmente como elementos estruturais no setor da construção civil. A norma brasileira que trata de cálculos de projetos de estruturas de madeira recomenda o uso de madeira na faixa de 10% a 20% de umidade. Dessa forma, foi objetivo do trabalho apresentar uma investigação sobre a influência do teor de umidade no módulo de elasticidade estático (MOEst) de vigas de madeira por meio de ensaios de vibração transversal. O MOEst foi avaliado por ensaios estáticos de flexão e ensaios de vibração transversal para diversos teores de umidade. O ensaio de vibração transversal foi realizado em condição livre utilizando um acelerômetro e um martelo de impulso, e o módulo de elasticidade dinâmico (MOEd) foi determinado a partir da frequência do primeiro modo de vibração de flexão. Um total de 20 vigas de madeira foram obtidas de toras de Pinus spp. recém cortadas. Foram utilizadas toras com alto teor de umidade inicial, com dimensões nominais de 5 cm × 10 cm × 200 cm (espessura × largura × comprimento). Observou-se que o MOEd também é afetado pelo teor de umidade de acordo com o modelo de regressão não linear obtido. Houve mudanças significativas no módulo de elasticidade dinâmico (MOEd) para os teores de umidade (M) abaixo de 25% (próximo ao ponto de saturação da fibra - FSP).Research, Society and Development2022-08-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/3368710.33448/rsd-v11i11.33687Research, Society and Development; Vol. 11 No. 11; e232111133687Research, Society and Development; Vol. 11 Núm. 11; e232111133687Research, Society and Development; v. 11 n. 11; e2321111336872525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIenghttps://rsdjournal.org/index.php/rsd/article/view/33687/28376Copyright (c) 2022 Marcelo Rodrigo Carreira; Pedro Gutemberg de Alcântara Segundinho; Fabricio Gomes Gonçalves; Juarez Benigno Paes; Antônio Alves Dias; Pedro Nicó de Medeiros Neto; Leonor da Cunha Mastela; Yonny Martinez Lopezhttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessCarreira, Marcelo Rodrigo Segundinho, Pedro Gutemberg de Alcântara Gonçalves, Fabricio GomesPaes, Juarez Benigno Dias, Antônio Alves Medeiros Neto, Pedro Nicó de Mastela, Leonor da Cunha Lopez, Yonny Martinez 2022-09-05T13:24:46Zoai:ojs.pkp.sfu.ca:article/33687Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:49:15.451174Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false |
dc.title.none.fl_str_mv |
Influence of moisture content on the dynamic modulus of elasticity Influencia del contenido de humedad en el módulo dinámico de elasticidad Influência do teor de umidade no módulo de elasticidade dinâmico |
title |
Influence of moisture content on the dynamic modulus of elasticity |
spellingShingle |
Influence of moisture content on the dynamic modulus of elasticity Carreira, Marcelo Rodrigo Ensayo de flexión Ensayo no destructivo Madera de Pinus spp. Frecuencia Saturación de fibras. Bending test Non-destructive test Pinus spp. wood Frequency Fiber saturation. Ensaio de flexão Ensaio não destrutivo Madeira de Pinus spp. Frequência Saturação das fibras. |
title_short |
Influence of moisture content on the dynamic modulus of elasticity |
title_full |
Influence of moisture content on the dynamic modulus of elasticity |
title_fullStr |
Influence of moisture content on the dynamic modulus of elasticity |
title_full_unstemmed |
Influence of moisture content on the dynamic modulus of elasticity |
title_sort |
Influence of moisture content on the dynamic modulus of elasticity |
author |
Carreira, Marcelo Rodrigo |
author_facet |
Carreira, Marcelo Rodrigo Segundinho, Pedro Gutemberg de Alcântara Gonçalves, Fabricio Gomes Paes, Juarez Benigno Dias, Antônio Alves Medeiros Neto, Pedro Nicó de Mastela, Leonor da Cunha Lopez, Yonny Martinez |
author_role |
author |
author2 |
Segundinho, Pedro Gutemberg de Alcântara Gonçalves, Fabricio Gomes Paes, Juarez Benigno Dias, Antônio Alves Medeiros Neto, Pedro Nicó de Mastela, Leonor da Cunha Lopez, Yonny Martinez |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Carreira, Marcelo Rodrigo Segundinho, Pedro Gutemberg de Alcântara Gonçalves, Fabricio Gomes Paes, Juarez Benigno Dias, Antônio Alves Medeiros Neto, Pedro Nicó de Mastela, Leonor da Cunha Lopez, Yonny Martinez |
dc.subject.por.fl_str_mv |
Ensayo de flexión Ensayo no destructivo Madera de Pinus spp. Frecuencia Saturación de fibras. Bending test Non-destructive test Pinus spp. wood Frequency Fiber saturation. Ensaio de flexão Ensaio não destrutivo Madeira de Pinus spp. Frequência Saturação das fibras. |
topic |
Ensayo de flexión Ensayo no destructivo Madera de Pinus spp. Frecuencia Saturación de fibras. Bending test Non-destructive test Pinus spp. wood Frequency Fiber saturation. Ensaio de flexão Ensaio não destrutivo Madeira de Pinus spp. Frequência Saturação das fibras. |
description |
Pinus forests are the second most planted in Brazil and the wood obtained from them is mainly used as structural elements in the civil construction sector. The Brazilian standard that deals with calculations of wooden structures projects recommends the use of wood in the range of 10% to 20% of moisture content. Thus, this study aimed to present an investigation about the influence of moisture content on the static modulus of elasticity (MOEst) of wooden beams by transverse vibration tests. The MOEst was evaluated by static bending tests and transverse vibration tests for various moisture content. The transverse vibration test was performed in a free condition using an accelerometer and an impulse hammer, and the dynamic modulus of elasticity (MOEd) was determined from the frequency of the first bending vibration mode. A total of 20 wooden beams were obtained from freshly cut Pinus spp. logs with initial high moisture content were used, with nominal dimensions of 5 cm × 10 cm × 200 cm (thickness × width × length). It was observed that the MOEd is also affected by moisture content according to the non-linear regression model. There were significant changes in the dynamic modulus of elasticity (MOEd) for the moisture contents (M) below 25% (near the fiber saturation point - FSP). |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-08-21 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/33687 10.33448/rsd-v11i11.33687 |
url |
https://rsdjournal.org/index.php/rsd/article/view/33687 |
identifier_str_mv |
10.33448/rsd-v11i11.33687 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/33687/28376 |
dc.rights.driver.fl_str_mv |
https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Research, Society and Development |
publisher.none.fl_str_mv |
Research, Society and Development |
dc.source.none.fl_str_mv |
Research, Society and Development; Vol. 11 No. 11; e232111133687 Research, Society and Development; Vol. 11 Núm. 11; e232111133687 Research, Society and Development; v. 11 n. 11; e232111133687 2525-3409 reponame:Research, Society and Development instname:Universidade Federal de Itajubá (UNIFEI) instacron:UNIFEI |
instname_str |
Universidade Federal de Itajubá (UNIFEI) |
instacron_str |
UNIFEI |
institution |
UNIFEI |
reponame_str |
Research, Society and Development |
collection |
Research, Society and Development |
repository.name.fl_str_mv |
Research, Society and Development - Universidade Federal de Itajubá (UNIFEI) |
repository.mail.fl_str_mv |
rsd.articles@gmail.com |
_version_ |
1797052721466966016 |