BENDING STIFFNESS AND RESISTENCE OF STRUCTURAL GLULAM BEAMS AND I – JOIST COMPOSED OF DIFFERENT ADHESIVES

Detalhes bibliográficos
Autor(a) principal: Cunha, Alexsandro Bayestorff da
Data de Publicação: 2010
Outros Autores: Matos, Jorge Luis Monteiro de
Tipo de documento: Artigo
Idioma: por
Título da fonte: Ciência Florestal (Online)
Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/1857
Resumo: Wood has always been structurally used in solid form in civil construction, with a low degree of processing and technological innovation, and many times in other constituents such as floors, walls and roofs. However, changes in the adopted standards involve the refinement of technology, as well as, changes of the esthetic and functional concepts required in constructions. Thus, structural wood beams, such as glulam and I – joist, have emerged, presenting a series of advantages such as high resistance in relation to weight. The general objective of this study was to evaluate the effect of the type of adhesive on the strength and stiffness of beams of Glulam and I-joist of Pinus taeda. The adhesives used in the experiment were resorcinol-phenolformaldehyde (RFF), melamine-urea-formaldehyde (MUF) and polyurethane (PUR). The process of manufacturing the beams involved the classification of the parts, manufacturing of the finger joint, junction, assembly and pressing. The assays involved the assessment of structural properties of bending such as the Elasticity Model and Rupture. In the analysis of the average values for the variables, no significant differences were found for the glulam, however, for the I - joist, the superiority of the PUR adhesive was verified, based on the average value of the rupture model. In relation to the types and weights of the adhesives used, it was observed that the RFF adhesive needed a greater amount of the product to provide the mechanism of adherence, 500 g/m2. Two parameters made the PUR adhesive different in relation to the others: a 24 times faster healing time, making it more advantageous from the point of view of volume of production; and the shorter open time, which requires special procedures. The glulam beams showed higher mean values, but the choice of the beam model must be analyzed carefully, always taking into consideration the required resistance and the cost of the material to be used in the confection. 
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spelling BENDING STIFFNESS AND RESISTENCE OF STRUCTURAL GLULAM BEAMS AND I – JOIST COMPOSED OF DIFFERENT ADHESIVESRigidez e resistência de vigas estruturais de madeira laminada colada e com perfil I compostas por diferentes adesivos.glulamI – joistpotential adhesives for beams.madeira laminada coladaviga com perfil em Iadesivos potenciais para vigasWood has always been structurally used in solid form in civil construction, with a low degree of processing and technological innovation, and many times in other constituents such as floors, walls and roofs. However, changes in the adopted standards involve the refinement of technology, as well as, changes of the esthetic and functional concepts required in constructions. Thus, structural wood beams, such as glulam and I – joist, have emerged, presenting a series of advantages such as high resistance in relation to weight. The general objective of this study was to evaluate the effect of the type of adhesive on the strength and stiffness of beams of Glulam and I-joist of Pinus taeda. The adhesives used in the experiment were resorcinol-phenolformaldehyde (RFF), melamine-urea-formaldehyde (MUF) and polyurethane (PUR). The process of manufacturing the beams involved the classification of the parts, manufacturing of the finger joint, junction, assembly and pressing. The assays involved the assessment of structural properties of bending such as the Elasticity Model and Rupture. In the analysis of the average values for the variables, no significant differences were found for the glulam, however, for the I - joist, the superiority of the PUR adhesive was verified, based on the average value of the rupture model. In relation to the types and weights of the adhesives used, it was observed that the RFF adhesive needed a greater amount of the product to provide the mechanism of adherence, 500 g/m2. Two parameters made the PUR adhesive different in relation to the others: a 24 times faster healing time, making it more advantageous from the point of view of volume of production; and the shorter open time, which requires special procedures. The glulam beams showed higher mean values, but the choice of the beam model must be analyzed carefully, always taking into consideration the required resistance and the cost of the material to be used in the confection. A madeira sempre foi utilizada estruturalmente na construção civil na forma sólida, com baixo grau de processamento e inovação tecnológica e, muitas vezes, em outros componentes como em pisos, paredes e telhados. Entretanto, a mudança nos padrões adotados envolveu o aperfeiçoamento da tecnologia, bem como a mudança do conceito estético e funcional requerido nas construções. Dessa forma, surgiram as vigas estruturais em madeira como a Madeira Laminada Colada (MLC) e com Perfil em I que apresentam uma série de vantagens como à alta resistência em relação ao seu peso. O objetivo geral do presente estudo foi avaliar o efeito do tipo de adesivo sobre a resistência e rigidez de vigas estruturais de Madeira Laminada Colada (MLC) e com perfil em I de Pinus taeda. Os adesivos utilizados no experimento foram a Resorcina Fenol Formaldeído (RFF), a Melamina Uréia Formaldeído (MUF) e o Poliuretano (PUR). O processo de fabricação das vigas envolveu a classificação das peças, fabricação de emendas, junção, montagem e prensagem. Os ensaios envolveram a avaliação das propriedades estruturais sob flexão como Módulo de Elasticidade (MOE) e Ruptura (MOR). Na análise dos valores médios obtidos para as variáveis não foram encontradas diferenças significativas para as vigas de MLC, entretanto, nas vigas com perfil em I, verificouse a superioridade do adesivo PUR no valor médio do MOR. Em relação aos tipos e gramaturas de adesivos utilizados, observou-se que o adesivo RFF necessita de maior quantidade do produto para atender ao mecanismo da adesão, 500 g/m2. Dois parâmetros tornaram o adesivo PUR diferenciado em relação aos demais; o tempo de cura 24 vezes mais rápido, tornando-o mais vantajoso sob o ponto de vista de volume de produção e o tempo em aberto mais curto que requer procedimentos especiais. As vigas de MLC apresentaram valores médio superiores, mas a escolha do modelo de viga deve ser analisada cuidadosamente, levando-se sempre em consideração a resistência requerida e o custo do material a ser utilizado na confecção destas.Universidade Federal de Santa Maria2010-06-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/185710.5902/198050981857Ciência Florestal; Vol. 20 No. 2 (2010); 345-356Ciência Florestal; v. 20 n. 2 (2010); 345-3561980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/1857/1202Cunha, Alexsandro Bayestorff daMatos, Jorge Luis Monteiro deinfo:eu-repo/semantics/openAccess2017-05-05T14:22:10Zoai:ojs.pkp.sfu.ca:article/1857Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2017-05-05T14:22:10Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false
dc.title.none.fl_str_mv BENDING STIFFNESS AND RESISTENCE OF STRUCTURAL GLULAM BEAMS AND I – JOIST COMPOSED OF DIFFERENT ADHESIVES
Rigidez e resistência de vigas estruturais de madeira laminada colada e com perfil I compostas por diferentes adesivos.
title BENDING STIFFNESS AND RESISTENCE OF STRUCTURAL GLULAM BEAMS AND I – JOIST COMPOSED OF DIFFERENT ADHESIVES
spellingShingle BENDING STIFFNESS AND RESISTENCE OF STRUCTURAL GLULAM BEAMS AND I – JOIST COMPOSED OF DIFFERENT ADHESIVES
Cunha, Alexsandro Bayestorff da
glulam
I – joist
potential adhesives for beams.
madeira laminada colada
viga com perfil em I
adesivos potenciais para vigas
title_short BENDING STIFFNESS AND RESISTENCE OF STRUCTURAL GLULAM BEAMS AND I – JOIST COMPOSED OF DIFFERENT ADHESIVES
title_full BENDING STIFFNESS AND RESISTENCE OF STRUCTURAL GLULAM BEAMS AND I – JOIST COMPOSED OF DIFFERENT ADHESIVES
title_fullStr BENDING STIFFNESS AND RESISTENCE OF STRUCTURAL GLULAM BEAMS AND I – JOIST COMPOSED OF DIFFERENT ADHESIVES
title_full_unstemmed BENDING STIFFNESS AND RESISTENCE OF STRUCTURAL GLULAM BEAMS AND I – JOIST COMPOSED OF DIFFERENT ADHESIVES
title_sort BENDING STIFFNESS AND RESISTENCE OF STRUCTURAL GLULAM BEAMS AND I – JOIST COMPOSED OF DIFFERENT ADHESIVES
author Cunha, Alexsandro Bayestorff da
author_facet Cunha, Alexsandro Bayestorff da
Matos, Jorge Luis Monteiro de
author_role author
author2 Matos, Jorge Luis Monteiro de
author2_role author
dc.contributor.author.fl_str_mv Cunha, Alexsandro Bayestorff da
Matos, Jorge Luis Monteiro de
dc.subject.por.fl_str_mv glulam
I – joist
potential adhesives for beams.
madeira laminada colada
viga com perfil em I
adesivos potenciais para vigas
topic glulam
I – joist
potential adhesives for beams.
madeira laminada colada
viga com perfil em I
adesivos potenciais para vigas
description Wood has always been structurally used in solid form in civil construction, with a low degree of processing and technological innovation, and many times in other constituents such as floors, walls and roofs. However, changes in the adopted standards involve the refinement of technology, as well as, changes of the esthetic and functional concepts required in constructions. Thus, structural wood beams, such as glulam and I – joist, have emerged, presenting a series of advantages such as high resistance in relation to weight. The general objective of this study was to evaluate the effect of the type of adhesive on the strength and stiffness of beams of Glulam and I-joist of Pinus taeda. The adhesives used in the experiment were resorcinol-phenolformaldehyde (RFF), melamine-urea-formaldehyde (MUF) and polyurethane (PUR). The process of manufacturing the beams involved the classification of the parts, manufacturing of the finger joint, junction, assembly and pressing. The assays involved the assessment of structural properties of bending such as the Elasticity Model and Rupture. In the analysis of the average values for the variables, no significant differences were found for the glulam, however, for the I - joist, the superiority of the PUR adhesive was verified, based on the average value of the rupture model. In relation to the types and weights of the adhesives used, it was observed that the RFF adhesive needed a greater amount of the product to provide the mechanism of adherence, 500 g/m2. Two parameters made the PUR adhesive different in relation to the others: a 24 times faster healing time, making it more advantageous from the point of view of volume of production; and the shorter open time, which requires special procedures. The glulam beams showed higher mean values, but the choice of the beam model must be analyzed carefully, always taking into consideration the required resistance and the cost of the material to be used in the confection. 
publishDate 2010
dc.date.none.fl_str_mv 2010-06-30
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://periodicos.ufsm.br/cienciaflorestal/article/view/1857
10.5902/198050981857
url https://periodicos.ufsm.br/cienciaflorestal/article/view/1857
identifier_str_mv 10.5902/198050981857
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.ufsm.br/cienciaflorestal/article/view/1857/1202
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 Universidade Federal de Santa Maria
publisher.none.fl_str_mv Universidade Federal de Santa Maria
dc.source.none.fl_str_mv Ciência Florestal; Vol. 20 No. 2 (2010); 345-356
Ciência Florestal; v. 20 n. 2 (2010); 345-356
1980-5098
0103-9954
reponame:Ciência Florestal (Online)
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Ciência Florestal (Online)
collection Ciência Florestal (Online)
repository.name.fl_str_mv Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)
repository.mail.fl_str_mv ||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br
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