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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