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Tannert - The Canadian Perspective on Glued-In Rods
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Transcript of Tannert - The Canadian Perspective on Glued-In Rods
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Architektur, Holz und Bau
ThomasTannert
TheUniversityofBritishColumbia
TimberConnectionswithGluedinRods
TheCanadianPerspective
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Tannert TheCanadianPerspective 2
Outline
GluedinrodsinCanada
Alternativedesignapproachforgluedinrods
RelatedactivitiesofRILEMcommitteeRTE
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Tannert TheCanadianPerspective 3
Outline
GluedinrodsinCanada
Alternativedesignapproachforgluedinrods
RelatedactivitiesofRILEMcommitteeRTE
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Tannert TheCanadianPerspective 4
GluedinrodsinCanada(1990)
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Tannert TheCanadianPerspective 5
Pullouttests@30
GluedinrodsinCanada(1990)
MASc thesisMalczyk
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Tannert TheCanadianPerspective 6
Beamtests
GluedinrodsinCanada(1990)
MASc thesisMalczyk
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Tannert TheCanadianPerspective 7
Rackingtests
GluedinrodsinCanada(1990)
MASc thesisMalczyk
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Tannert TheCanadianPerspective 8
Kneejointtests
GluedinrodsinCanada(1990)
MASc thesisMalczyk
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Tannert TheCanadianPerspective 9
GluedinrodsinCanada(1990)
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Tannert TheCanadianPerspective 10
MCandtemperaturetests
GluedinrodsinCanada(1990)
MASc thesisWiktor
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Tannert TheCanadianPerspective 11
Compressionreinforcementperp.tothegrain:
GluedinrodsinCanada(1990)
MASc thesisWiktor
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Tannert TheCanadianPerspective 12
Beamtocolumnjointsunderreversedloading
GluedinrodsinCanada(1990)
MASc thesisWiktor
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Tannert TheCanadianPerspective 13
GluedinrodsinCanada(1991 2011)
ApplicationonlyinrepairinEasternCanada
Mainreason:thequalitycontrol..
Usedinstead:STS,BVD
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Tannert TheCanadianPerspective 14
EarthScienceCentreUBC(2011)
Source:Equilibrium
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Tannert TheCanadianPerspective 15
GluedinrodsinCanada(2012)
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Tannert TheCanadianPerspective 16
GluedinrodsinCanada(2012)
Parameters:
Rodmaterial:steelandFRP
Adhesive:EpoxyandPU
Embedmentlengths:50mm 250mm
Roddiameter:2/8 6/8
Quasistaticandfatiguetests
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Tannert TheCanadianPerspective 17
GluedinrodsinCanada(2012)
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Tannert TheCanadianPerspective 18
Outline
GluedinrodsinCanada
Alternativedesignapproachforgluedinrods
RelatedactivitiesofRILEMcommitteeRTE
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Tannert TheCanadianPerspective 19
Alternativedesignapproachforgluedinrods
Previousdesignapproaches:
Analyticalforidealizedsituations(e.g.Volkersen)
Stressbasedmethods(e.g.averageshearstress)
Adaptedstressbasedmethods(e.g.meanstress)
Fracturemechanics
Linearelasticfracturemechanicsapproach
Nonlinearfracturemechanics
Quasinonlinearfracturemechanics
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Tannert TheCanadianPerspective 20
Alternativedesignapproachforgluedinrods
ProbabilisticCapacityPrediction:
Determinationofstressstate
Useofappropriatefailurecriterion
Knowledgeofmaterialresistance
Considerationofsizeeffects
Applicationofcapacitypredictionalgorithm
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Tannert TheCanadianPerspective 21
Determinationofstressstate
ApplicationofFEA
Separationofjointintofiniteelements
Calculatestressesforeachelement
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Tannert TheCanadianPerspective 22
Failurecriterion
E.g.Norris:
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Tannert TheCanadianPerspective 23
Materialresistance(forbrittlefailure)
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Tannert TheCanadianPerspective 24
Statisticalsizeeffect
DeterminationofWeibullparametersmandk
Usedmethod:rankregressiononlinearCDF
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Tannert TheCanadianPerspective 25
Capacitypredictionalgorithm
Replacestressoperatorwithfailurecriterion
e.g.Norris2D:
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Tannert TheCanadianPerspective 26
Calculateprobabilityofsurvival
PS = 0.50formeanvalues(FPRED)
PS = 0.95forcharacteristicvalues(FPRED,k)
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Tannert TheCanadianPerspective 27
Numericalimplementation
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Tannert TheCanadianPerspective 28
Example:Adhesivelybondedjoints
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Tannert TheCanadianPerspective 29
Example:Adhesivelybondedjoints
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Tannert TheCanadianPerspective 30
ProbabilisticCapacityPrediction
Furthersuccesful experimentalvalidationon:
Adhesivelybondedjointswithwideparameterrange:
Differentadhesivesandadhesivesgrading
Stressreductionmethods
Differenttemperatures
Carpentrytypetimberjoints
Jointswithgluedinsteelplates
Weldedwoodjoints
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Tannert TheCanadianPerspective 31
Outline
GluedinrodsinCanada
Alternativedesignapproachforgluedinrods
RelatedactivitiesofRILEMcommitteeRTE
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Tannert TheCanadianPerspective 32
RILEMcommitteeRTE
Objectives:
Toimprovethereinforcementpracticetimberstructuralelements
Todisseminateuptodateresultstotheindustry,policymakersandsociety
Tooptimisecollaborationofinvolvedstakeholdersinresearchandindustry
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Tannert TheCanadianPerspective 33
RILEMcommitteeRTE
Followingreinforcementsystemswillbeevaluated:
Timberandtimberbasedproducts(e.g.LVL&CLT)
Adhesivesystems(consideringonsiteapplication)
Fasteners(e.g.gluedinrods&selftappingscrews)
Fibrereinforcedpolymersandnaturalfibres
Nanotechnology(e.g.carbonnanotubes)
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Tannert TheCanadianPerspective 34
RILEMcommitteeRTE
Operativemilestones:
2012Summarisingresearch&researchneeds
2013DevelopmentofStateoftheartreport
2014Workshoponreinforcementmethods
2015Developmentofharmonizedguidelines
2016Workshoponharmonizedguidelines
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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
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Architektur, Holz und Bau
ThomasTannert
TheUniversityofBritishColumbia
TimberConnectionswithGluedinRods
TheCanadianPerspective