Vibrational problems of timber beams with knots considering uncertainties

Autores
Garcia, Diego Alberto; Sampaio, Rubens; Rosales, Marta Beatriz
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A stochastic model of the dynamic behavior of sawn timber beams of Argentinean Eucalyptus grandis is herein presented. The aim of this work is to study the influence of the timber knots in the dynamical response of timber beams. The presence of knots is known to be the main source of the lengthwise variability and reduction of bending strength and stiffness in timber beams. The following parameters of the timber knots are considered stochastic: position along the beam span and within the beam cross section, shape and dimensions. Experimental data, obtained from bending and density tests, are employed to find the timber modulus of elasticity (MOE) and density. On the other hand, the characteristic of the timber knots used in the stochastic model was obtained from a visual survey performed with 25 beams of the same species. The problem of the natural vibration frequencies of the timber beam is approximated with the finite element method. Numerical results are obtained using Monte Carlo Simulations (MCS). The uncertainties of the timber knots parameters and their influence are quantified with the probability density function (PDF) of the frequencies. Statistical results obtained by means of MCS are compared with experimental measurements in order to assess the accuracy of the stochastic model. The present approach that gives a more realistic description of timber structures, correlatesbetter with experiments.
Fil: Garcia, Diego Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería. Área Estabilidad; Argentina
Fil: Sampaio, Rubens. Pontificia Universidad Catolica Do Rio de Janeiro; Brasil
Fil: Rosales, Marta Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería. Área Estabilidad; Argentina
Materia
Timber Beams
Knots
Uncertainties
Natural Vibration Frequencies
Natural Vibration Modes
Composite Materials
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/47335
Acceder
id CONICETDig_e442dee8d6a13afe9010f382dac6415e
oai_identifier_str oai:ri.conicet.gov.ar:11336/47335
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Vibrational problems of timber beams with knots considering uncertaintiesGarcia, Diego AlbertoSampaio, RubensRosales, Marta BeatrizTimber BeamsKnotsUncertaintiesNatural Vibration FrequenciesNatural Vibration ModesComposite Materialshttps://purl.org/becyt/ford/2.1https://purl.org/becyt/ford/2https://purl.org/becyt/ford/1.1https://purl.org/becyt/ford/1A stochastic model of the dynamic behavior of sawn timber beams of Argentinean Eucalyptus grandis is herein presented. The aim of this work is to study the influence of the timber knots in the dynamical response of timber beams. The presence of knots is known to be the main source of the lengthwise variability and reduction of bending strength and stiffness in timber beams. The following parameters of the timber knots are considered stochastic: position along the beam span and within the beam cross section, shape and dimensions. Experimental data, obtained from bending and density tests, are employed to find the timber modulus of elasticity (MOE) and density. On the other hand, the characteristic of the timber knots used in the stochastic model was obtained from a visual survey performed with 25 beams of the same species. The problem of the natural vibration frequencies of the timber beam is approximated with the finite element method. Numerical results are obtained using Monte Carlo Simulations (MCS). The uncertainties of the timber knots parameters and their influence are quantified with the probability density function (PDF) of the frequencies. Statistical results obtained by means of MCS are compared with experimental measurements in order to assess the accuracy of the stochastic model. The present approach that gives a more realistic description of timber structures, correlatesbetter with experiments.Fil: Garcia, Diego Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería. Área Estabilidad; ArgentinaFil: Sampaio, Rubens. Pontificia Universidad Catolica Do Rio de Janeiro; BrasilFil: Rosales, Marta Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería. Área Estabilidad; ArgentinaBrazilian Society of Mechanical Sciences & Engineering2015-12-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/47335Garcia, Diego Alberto; Sampaio, Rubens; Rosales, Marta Beatriz; Vibrational problems of timber beams with knots considering uncertainties; Brazilian Society of Mechanical Sciences & Engineering; Journal of the Brazilian Society of Mechanical Sciences and Engineering; 38; 8; 12-12-2015; 2661-26731678-58781806-3691CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s40430-015-0418-1info:eu-repo/semantics/altIdentifier/doi/10.1007/s40430-015-0418-1info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:39:46Zoai:ri.conicet.gov.ar:11336/47335instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:39:46.456CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Vibrational problems of timber beams with knots considering uncertainties
title Vibrational problems of timber beams with knots considering uncertainties
spellingShingle Vibrational problems of timber beams with knots considering uncertainties
Garcia, Diego Alberto
Timber Beams
Knots
Uncertainties
Natural Vibration Frequencies
Natural Vibration Modes
Composite Materials
title_short Vibrational problems of timber beams with knots considering uncertainties
title_full Vibrational problems of timber beams with knots considering uncertainties
title_fullStr Vibrational problems of timber beams with knots considering uncertainties
title_full_unstemmed Vibrational problems of timber beams with knots considering uncertainties
title_sort Vibrational problems of timber beams with knots considering uncertainties
dc.creator.none.fl_str_mv Garcia, Diego Alberto
Sampaio, Rubens
Rosales, Marta Beatriz
author Garcia, Diego Alberto
author_facet Garcia, Diego Alberto
Sampaio, Rubens
Rosales, Marta Beatriz
author_role author
author2 Sampaio, Rubens
Rosales, Marta Beatriz
author2_role author
author
dc.subject.none.fl_str_mv Timber Beams
Knots
Uncertainties
Natural Vibration Frequencies
Natural Vibration Modes
Composite Materials
topic Timber Beams
Knots
Uncertainties
Natural Vibration Frequencies
Natural Vibration Modes
Composite Materials
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.1
https://purl.org/becyt/ford/2
https://purl.org/becyt/ford/1.1
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A stochastic model of the dynamic behavior of sawn timber beams of Argentinean Eucalyptus grandis is herein presented. The aim of this work is to study the influence of the timber knots in the dynamical response of timber beams. The presence of knots is known to be the main source of the lengthwise variability and reduction of bending strength and stiffness in timber beams. The following parameters of the timber knots are considered stochastic: position along the beam span and within the beam cross section, shape and dimensions. Experimental data, obtained from bending and density tests, are employed to find the timber modulus of elasticity (MOE) and density. On the other hand, the characteristic of the timber knots used in the stochastic model was obtained from a visual survey performed with 25 beams of the same species. The problem of the natural vibration frequencies of the timber beam is approximated with the finite element method. Numerical results are obtained using Monte Carlo Simulations (MCS). The uncertainties of the timber knots parameters and their influence are quantified with the probability density function (PDF) of the frequencies. Statistical results obtained by means of MCS are compared with experimental measurements in order to assess the accuracy of the stochastic model. The present approach that gives a more realistic description of timber structures, correlatesbetter with experiments.
Fil: Garcia, Diego Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería. Área Estabilidad; Argentina
Fil: Sampaio, Rubens. Pontificia Universidad Catolica Do Rio de Janeiro; Brasil
Fil: Rosales, Marta Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería. Área Estabilidad; Argentina
description A stochastic model of the dynamic behavior of sawn timber beams of Argentinean Eucalyptus grandis is herein presented. The aim of this work is to study the influence of the timber knots in the dynamical response of timber beams. The presence of knots is known to be the main source of the lengthwise variability and reduction of bending strength and stiffness in timber beams. The following parameters of the timber knots are considered stochastic: position along the beam span and within the beam cross section, shape and dimensions. Experimental data, obtained from bending and density tests, are employed to find the timber modulus of elasticity (MOE) and density. On the other hand, the characteristic of the timber knots used in the stochastic model was obtained from a visual survey performed with 25 beams of the same species. The problem of the natural vibration frequencies of the timber beam is approximated with the finite element method. Numerical results are obtained using Monte Carlo Simulations (MCS). The uncertainties of the timber knots parameters and their influence are quantified with the probability density function (PDF) of the frequencies. Statistical results obtained by means of MCS are compared with experimental measurements in order to assess the accuracy of the stochastic model. The present approach that gives a more realistic description of timber structures, correlatesbetter with experiments.
publishDate 2015
dc.date.none.fl_str_mv 2015-12-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/47335
Garcia, Diego Alberto; Sampaio, Rubens; Rosales, Marta Beatriz; Vibrational problems of timber beams with knots considering uncertainties; Brazilian Society of Mechanical Sciences & Engineering; Journal of the Brazilian Society of Mechanical Sciences and Engineering; 38; 8; 12-12-2015; 2661-2673
1678-5878
1806-3691
CONICET Digital
CONICET
url http://hdl.handle.net/11336/47335
identifier_str_mv Garcia, Diego Alberto; Sampaio, Rubens; Rosales, Marta Beatriz; Vibrational problems of timber beams with knots considering uncertainties; Brazilian Society of Mechanical Sciences & Engineering; Journal of the Brazilian Society of Mechanical Sciences and Engineering; 38; 8; 12-12-2015; 2661-2673
1678-5878
1806-3691
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s40430-015-0418-1
info:eu-repo/semantics/altIdentifier/doi/10.1007/s40430-015-0418-1
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Brazilian Society of Mechanical Sciences & Engineering
publisher.none.fl_str_mv Brazilian Society of Mechanical Sciences & Engineering
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1844613258967777280
score 13.070432

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