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Architektur, Holz und Bau Thomas Tannert The University of British Columbia Timber Connections with Glued‐in Rods The Canadian Perspective

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Glued in rods

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  • Architektur, Holz und Bau

    ThomasTannert

    TheUniversityofBritishColumbia

    TimberConnectionswithGluedinRods

    TheCanadianPerspective

  • Tannert TheCanadianPerspective 2

    Outline

    GluedinrodsinCanada

    Alternativedesignapproachforgluedinrods

    RelatedactivitiesofRILEMcommitteeRTE

  • Tannert TheCanadianPerspective 3

    Outline

    GluedinrodsinCanada

    Alternativedesignapproachforgluedinrods

    RelatedactivitiesofRILEMcommitteeRTE

  • Tannert TheCanadianPerspective 4

    GluedinrodsinCanada(1990)

  • Tannert TheCanadianPerspective 5

    Pullouttests@30

    GluedinrodsinCanada(1990)

    MASc thesisMalczyk

  • Tannert TheCanadianPerspective 6

    Beamtests

    GluedinrodsinCanada(1990)

    MASc thesisMalczyk

  • Tannert TheCanadianPerspective 7

    Rackingtests

    GluedinrodsinCanada(1990)

    MASc thesisMalczyk

  • Tannert TheCanadianPerspective 8

    Kneejointtests

    GluedinrodsinCanada(1990)

    MASc thesisMalczyk

  • Tannert TheCanadianPerspective 9

    GluedinrodsinCanada(1990)

  • Tannert TheCanadianPerspective 10

    MCandtemperaturetests

    GluedinrodsinCanada(1990)

    MASc thesisWiktor

  • Tannert TheCanadianPerspective 11

    Compressionreinforcementperp.tothegrain:

    GluedinrodsinCanada(1990)

    MASc thesisWiktor

  • Tannert TheCanadianPerspective 12

    Beamtocolumnjointsunderreversedloading

    GluedinrodsinCanada(1990)

    MASc thesisWiktor

  • Tannert TheCanadianPerspective 13

    GluedinrodsinCanada(1991 2011)

    ApplicationonlyinrepairinEasternCanada

    Mainreason:thequalitycontrol..

    Usedinstead:STS,BVD

  • Tannert TheCanadianPerspective 14

    EarthScienceCentreUBC(2011)

    Source:Equilibrium

  • Tannert TheCanadianPerspective 15

    GluedinrodsinCanada(2012)

  • Tannert TheCanadianPerspective 16

    GluedinrodsinCanada(2012)

    Parameters:

    Rodmaterial:steelandFRP

    Adhesive:EpoxyandPU

    Embedmentlengths:50mm 250mm

    Roddiameter:2/8 6/8

    Quasistaticandfatiguetests

  • Tannert TheCanadianPerspective 17

    GluedinrodsinCanada(2012)

  • Tannert TheCanadianPerspective 18

    Outline

    GluedinrodsinCanada

    Alternativedesignapproachforgluedinrods

    RelatedactivitiesofRILEMcommitteeRTE

  • Tannert TheCanadianPerspective 19

    Alternativedesignapproachforgluedinrods

    Previousdesignapproaches:

    Analyticalforidealizedsituations(e.g.Volkersen)

    Stressbasedmethods(e.g.averageshearstress)

    Adaptedstressbasedmethods(e.g.meanstress)

    Fracturemechanics

    Linearelasticfracturemechanicsapproach

    Nonlinearfracturemechanics

    Quasinonlinearfracturemechanics

  • Tannert TheCanadianPerspective 20

    Alternativedesignapproachforgluedinrods

    ProbabilisticCapacityPrediction:

    Determinationofstressstate

    Useofappropriatefailurecriterion

    Knowledgeofmaterialresistance

    Considerationofsizeeffects

    Applicationofcapacitypredictionalgorithm

  • Tannert TheCanadianPerspective 21

    Determinationofstressstate

    ApplicationofFEA

    Separationofjointintofiniteelements

    Calculatestressesforeachelement

  • Tannert TheCanadianPerspective 22

    Failurecriterion

    E.g.Norris:

  • Tannert TheCanadianPerspective 23

    Materialresistance(forbrittlefailure)

  • Tannert TheCanadianPerspective 24

    Statisticalsizeeffect

    DeterminationofWeibullparametersmandk

    Usedmethod:rankregressiononlinearCDF

  • Tannert TheCanadianPerspective 25

    Capacitypredictionalgorithm

    Replacestressoperatorwithfailurecriterion

    e.g.Norris2D:

  • Tannert TheCanadianPerspective 26

    Calculateprobabilityofsurvival

    PS = 0.50formeanvalues(FPRED)

    PS = 0.95forcharacteristicvalues(FPRED,k)

  • Tannert TheCanadianPerspective 27

    Numericalimplementation

  • Tannert TheCanadianPerspective 28

    Example:Adhesivelybondedjoints

  • Tannert TheCanadianPerspective 29

    Example:Adhesivelybondedjoints

  • Tannert TheCanadianPerspective 30

    ProbabilisticCapacityPrediction

    Furthersuccesful experimentalvalidationon:

    Adhesivelybondedjointswithwideparameterrange:

    Differentadhesivesandadhesivesgrading

    Stressreductionmethods

    Differenttemperatures

    Carpentrytypetimberjoints

    Jointswithgluedinsteelplates

    Weldedwoodjoints

  • Tannert TheCanadianPerspective 31

    Outline

    GluedinrodsinCanada

    Alternativedesignapproachforgluedinrods

    RelatedactivitiesofRILEMcommitteeRTE

  • Tannert TheCanadianPerspective 32

    RILEMcommitteeRTE

    Objectives:

    Toimprovethereinforcementpracticetimberstructuralelements

    Todisseminateuptodateresultstotheindustry,policymakersandsociety

    Tooptimisecollaborationofinvolvedstakeholdersinresearchandindustry

  • Tannert TheCanadianPerspective 33

    RILEMcommitteeRTE

    Followingreinforcementsystemswillbeevaluated:

    Timberandtimberbasedproducts(e.g.LVL&CLT)

    Adhesivesystems(consideringonsiteapplication)

    Fasteners(e.g.gluedinrods&selftappingscrews)

    Fibrereinforcedpolymersandnaturalfibres

    Nanotechnology(e.g.carbonnanotubes)

  • Tannert TheCanadianPerspective 34

    RILEMcommitteeRTE

    Operativemilestones:

    2012Summarisingresearch&researchneeds

    2013DevelopmentofStateoftheartreport

    2014Workshoponreinforcementmethods

    2015Developmentofharmonizedguidelines

    2016Workshoponharmonizedguidelines

  • Tannert TheCanadianPerspective 35

    RILEMcommitteeRTE Members

    ThomasTannert UBC,CanadaSimon Aicher MPAStuttgart,GermanyClaraBertoliniCestari Politecnico diTorino,ItalyKeithCrews UniversityofSydney,AustraliaJorgeManuelBranco UniversityofMinho,PortugalMilosDrdck ITAMAS,CzechRepublicBohumil Kasal Fraunhofer WKI,GermanyRobertKliger ChalmersUniversity,SwedenMohammadMohammad FPInnovations,CanadaMaurizioPiazza UniversityofTrento,ItalyMariapaolaRiggio UniversityofTrento,ItalyRobertWidmann Empa,SwitzerlandNobuyoshiYamaguchi BuildingResearchInstitute,Japan

  • Architektur, Holz und Bau

    ThomasTannert

    TheUniversityofBritishColumbia

    TimberConnectionswithGluedinRods

    TheCanadianPerspective


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