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ANALYSIS OF RHEOLOGICAL AND THERMO-HYGRO-MECHANICAL BEHAVIOUR OF STRESS-LAMINATED TIMBER BRIDGE DECK IN VARIABLE ENVIRONMENTAL CONDITIONS

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dc.creatorCECILIA DEL CARMEN BUSTOS ÁVILA
dc.date2012
dc.date.accessioned2025-01-10T14:31:14Z
dc.date.available2025-01-10T14:31:14Z
dc.date.issued2012
dc.description.abstractWOOD MATERIAL HAS A THERMO-HYGROMECHANICAL BEHAVIOUR BECAUSE ITS DEFORMATION DEPENDS ON THE COMBINED ACTION OF TEMPERATURE, RELATIVE HUMIDITY AND MECHANICAL LOAD VARIATIONS. STRESS-LAMINATED TIMBER BRIDGE DECK SHOW A REDUCTION OF STRESS IN THE TENSION BARS MAINLY DUE TO THE RELAXATION AND SHRINKAGE OF WOOD, INCREASING WITH MOISTURE CONTENT AND TEMPERATURE CHANGES WITHIN THE WOOD. THE AIM OF THIS RESEARCH WAS TO STUDY THE RHEOLOGICAL BEHAVIOR OF STRESS-LAMINATED TIMBER BRIDGE DECK SAMPLES UNDER TEMPERATURE AND RELATIVE HUMIDITY VARIATIONS. A TOTAL OF 16 SAMPLES WERE PREVIOUSLY TREATED WITH FOUR TYPES OF PRESERVATIVE TREATMENTS, WHICH WERE SUBJECTED TO FOUR CYCLES OF TEMPERATURE AND RELATIVE HUMIDITY IN A CLIMATE CHAMBER. WOOD SAMPLES DEFORMATION AND STRESS IN THE STEEL BARS WERE MEASURED. THE RESULTS SHOWED A SIGNIFICANT STRESS REDUCTION IN THE STEEL BAR DURING THE SUMMER SEASON AND A SIGNIFICANT INCREASE DURING THE WINTER SEASON. THE RESULTS ALSO SHOWED SIGNIFICANT DIFFERENCES BETWEEN THE DEFORMATIONS OF CONTROL SAMPLES COMPARED TO THE PRESERVATIVE TREATED SAMPLES FOR EACH CYCLE. HOWEVER, FOR INTERLAMINAR STRESS, DIFFERENCES WERE SIGNIFICANT ONLY IN THE WINTER SEASON. MOREOVER, FOR BOTH DEFORMATION AND INTERLAMINAR STRESS, NO SIGNIFICANT DIFFERENCES BETWEEN CYCLES THREE AND FOUR WERE FOUND. THEREFORE THERE IS NO EVIDENCE OF THERMO-HYGROMECHANICAL CREEP OR RELAXATION OF WOOD IN THE CONDITIONS CONSIDERED IN THIS STUDY.
dc.formatapplication/pdf
dc.identifier.doi10.4067/S0718-221X2012005000005
dc.identifier.issn0717-3644
dc.identifier.issn0718-221X
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/7788
dc.languagespa
dc.publisherMADERAS: CIENCIA Y TECNOLOGIA
dc.relation.uri10.4067/S0718-221X2012005000005
dc.rightsPUBLICADA
dc.subjectTRATAMIENTOS DE PRESERVACIÓN
dc.subjectTENSIÓN EN LAS BARRAS
dc.subjectPUENTES TENSADOS
dc.subjectPINUS RADIATA D.DON.
dc.subjectSTRESS-LAMINATED TIMBER BRIDGE DECK
dc.subjectPRESERVATION TREATMENTS
dc.subjectPINUS RADIATA D.DON.
dc.subjectBAR STRESS
dc.titleANALYSIS OF RHEOLOGICAL AND THERMO-HYGRO-MECHANICAL BEHAVIOUR OF STRESS-LAMINATED TIMBER BRIDGE DECK IN VARIABLE ENVIRONMENTAL CONDITIONS
dc.title.alternativeANÁLISIS DEL COMPORTAMIENTO REOLÓGICO Y TERMO-HIGROMECÁNICO EN PROBETAS DE TABLEROS TENSADOS DE MADERA PARA PUENTES A CONDICIONES AMBIENTALES VARIABLES
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE INGENIERIA EN MADERAS
ubb.SedeCONCEPCIÓN
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