Acompleteexperimentalcampaignwascarriedouttodeter-
minetheanchorbehaviourwithandwithouttheanchorplate
[10].Inthefollowing,onlythetestsusedtovalidatethenite
elementmodelaredescribed.Theaimsoftheexperiments
(Fig.2)are,ontheonehand,tocharacterisetheanchorrodand
concreteblockbehaviourforpull-outtestsand,ontheother
hand,toanalysetheevolutionofanchorprestresswithrelaxation
tests.
Thetestsusedtodevelopthenumericalmodelareasfollows: Twopull-outtests(testsP4,P5),withandwithoutprestress,in
ordertodeterminethestrainstateoftheconcreteblock.Theload-
ingapplicationisdescribedin Fig.3.Theloadingisappliedbya
r ,r ,r .Between
jackthreetimesuptothreerodstresslevels
L1 L2 L3
twosubsequentstresslevels,thejackloadwassuppressedand
therodwasmaintainedundertensionwithalockingwasherat
r ,r ,andr .Theprestresslev-
threedifferentprestresslevels
P1 P2 P3
r0.3 r , r0.6 r and rr with r the
elswereabout
P1 r P2 r P3 r r
yieldrodstress.
Onerelaxationtest(R1):aprestressvalueof394MPaintherod
ismaintainedforseveralmonthsinordertoshowtheevolution
oftheinitialpreload.