BS EN 13391-2004 Mechanical tests for post-tensioning systems《后张法用机械试验》.pdf

1、BRITISH STANDARD BS EN 13391:2004 Mechanical tests for post-tensioning systems The European Standard EN 13391:2004 has the status of a British Standard ICS 91.080.40 BS EN 13391:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 19 October

2、2004 BSI 19 October 2004 ISBN 0 580 44624 7 National foreword This British Standard is the official English language version of EN 13391:2004. It supersedes BS 4447:1973 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee B/525, Building and civil enginee

3、ring structures, to Subcommittee B/525/2, Structural use of concrete, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Additional information Attention is drawn also to ETAG 013 (June 2002), Guideline for European

4、Technical Approval of post-tensioning kits for prestressing of structures (these are commonly called Post-Tensioning Systems), available from EOTA, Kunstlaan 40 Avenue des Arts, B-1040 Brussels (see http:/www.eota.be). Cross-references The British Standards which implement international or European

5、publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all th

6、e necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on th

7、e interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 21 and a back cover. The

8、BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN13391 March2004 ICS91.080.40 Englishversion Mechanicaltestsforposttensioningsystems Essaismcaniquesc

9、oncernantlesprocdsde prcontrainteparposttension MechanischePrfungenfrSpannverfahrenit nachtrglichemVerbund ThisEuropeanStandardwasapprovedbyCENon3November2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationa

10、lstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheres

11、ponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,M

12、alta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserv

13、ed worldwideforCENnationalMembers. Ref.No.EN13391:2004:EEN13391:2004(E) 2 Contents Page Foreword. 3 1 Scope . 4 2 Normativereferences . 4 3 Terms,definitionsandsymbols 4 3.1 Definitions 4 4 Testsandrequirementsforposttensioninganchorages 6 4.1 General. 6 4.1.1 Purpose 6 4.1.2 Specificationofsystem.

14、. 6 4.1.3 Laboratory,testingfacility . 6 4.1.4 Materialsandcomponentsforthetests . 6 4.1.5 Typesoftest. . 6 4.2 Testingofsystemswithmechanicalanchorages . 7 4.2.1 Staticloadtestwithtendonanchorageassembly . .7 4.2.2 Fatiguetestwithtendonanchorageassembly. . 9 4.2.3 Loadtransfertest 10 4.3 Testingofs

15、ystemswithbondanchorage 11 4.3.1 Staticloadtestwithbondanchorage . 11 4.3.2 Fatigueloadtestwithbondanchorage . . 12 5 Supplementarytests. 12 5.1 General. 12 5.2 Multiplestressingtest . . 13 5.3 Frictiontest. . 13 5.4 Groutabilitytest. 13 5.5 Deviationtestforanchorages . 13 5.6 Deviationtestforunbond

16、edexternaltendons 13 6 Testreport . 13 AnnexA (informative) Figures . .14 Bibliography . 21EN13391:2004(E) 3 Foreword Thisdocument(EN13391:2004)hasbeenpreparedbyTechnicalCommitteeCEN/TC 250“Structural Eurocodes”,thesecretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationalst

17、andard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyAugust2004,andconflictingnationalstandardsshallbewithdrawnat thelatestbyAugust2004. ThisEuropeanStandardwaspreparedbyWorkingGroup1ofCEN/TC 250/SC 2“Designofconcrete structures“.ThestandardsupplementsENV199211,ENV19922andthe“Eur

18、opeanTechnicalApproval Guidelineofposttensioningkitsforprestressingofstructures(thesearecommonlycalledPostTensioning Systems)“,ETAG013. AnnexAisinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:A

19、ustria,Belgium,Cyprus,CzechRepublic, Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania, Luxembourg,Malta,Netherlands,Norway,Poland,Portugal,Slovakia,Slovenia,Spain,Sweden,Switzerland andUnitedKingdom.EN13391:2004(E) 4 1Scope ThisEuropeanStandardspecifiesthe

20、testproceduresfortheanchoragesandcouplingsofposttensioning systems.ThisstandardistobeusedinconjunctionwiththerelevantEuropeanStandardsENV199211and ENV19922andothersforpertainingtoprestressedconcretestructures. ThetestresultsshouldbeusedfortheacquisitionoftheTechnicalApprovalofthespecifiedposttension

21、ing system. Forunbondedtendonsadditionaltestsandrequirementsareneededandthesearenotcoveredinthepresent scopeofthisstandard. 2 Normativereferences Notapplicable. 3 Terms,definitionsandsymbols ForthepurposesofthisEuropeanStandard,thefollowingterms,definitionsandsymbolsapply. 3.1Definitions 3.1.1 Ancho

22、rage mechanicaldevice,usuallyconsistingofseveralcomponentsdesignedtoreliablyandsafelyretaintheforcein thestressedtendonandtotransmitittotheconcrete.Anchoragescanbeeitherofthetwotypesspecified below: Stressinganchorage:ananchoragelocatedattheendofatendonwhichcanbeusedforstressing.Itis exposeduntilgro

23、utinghasbeencarriedoutandtheanchoragesealed. Fixedanchorage:ananchoragewhichisnotusedfortendonstressing. 3.1.2 Anchoragezone localzoneinthestructurethroughwhichtheprestressingforceistransferredtothestructureviathe anchorage 3.1.3 Burstingreinforcement reinforcementintheanchoragezonetoresisttransvers

24、etensileforcesduetotheintroductionofprestressing forceintothestructure 3.1.4 Coupling devicetojointendons 3.1.5 Duct(sheathing) enclosureinwhichtheprestressingsteelisplacedandwhichtemporarilyorpermanentlyallowsrelative movementbetweentheprestressingsteelandsurroundingconcrete.Theremainingvoidwithint

25、heductcanEN13391:2004(E) 5 besubsequentlyfilledwithcementitiousgroutorothersuitablematerialtoprotecttheprestressingsteel againstcorrosion 3.1.6 Prestressing controlledgenerationofpermanentforcesanddeformationsinastructuralconcretemembertocounteractthe stressesarisingfromdeadandliveloadsand/orduetosh

26、rinkageetc. 3.1.7 Posttensioningsystem arrangementoftendonandanchoragestocarryoutposttensioning 3.1.8 Tendon oneoranumberofprestressingsteelelementse.g.wire,strand,bar,etc.Tendonscanbeeither: Bonded:followingstressingthetendonisgrouted,therebycreatingbondbetweentheprestressingsteel, grout,ductandcon

27、crete;or Unbonded:bondbetweentendonandconcreteispreventedwiththetensileforceofthestressedtendon beingpermanentlytransferredtotheconcretebytheanchoragesanddeviatorsonly 3.1.9 Tendonanchorageassembly connectionbetweentendonandanchorage Symbols A pk characteristiccrosssectionalareaofthetendon A pm actu

28、almeancrosssectionalareaofthetendon F pk characteristicultimateresistingforceofprestressingsteeloftendon; F pk = A pk f pk F pm calculatedultimateresistingforceofprestressingsteeloftendon; F pm = A pm f pm F Tu measuredultimateforceoftendonanchorageassembly F u measuredultimateforceinloadtransfertes

29、t max F upperforceinthedynamicloadtestwithtendonanchorageassembly min F lowerforceinthedynamicloadtestwithtendonanchorageassembly D F forcerangeinthedynamicloadtest; D F=max Fmin F f ck characteristiccompressivestrengthofconcreteat28days f ck,o minimumcharacteristiccompressivestrengthofconcreteatwhi

30、chfullprestressingisplannedonsite f cm,e meancompressivestrengthofconcreteofspecimenatfinaltesttofailureintheloadtransfertest f cm,o meancompressivestrengthofconcreteatwhichfullprestressingisplannedonsite f pk characteristictensilestrengthofprestressingsteelEN13391:2004(E) 6 f pm actualmeantensilest

31、rengthofprestressingsteelusedfortest(meanoftheresultofminimumthree tests) t time w crackwidthmeasuredintheloadtransfertest e Tu elongationofprestressingsteelonfreelengthoftendonatultimateforce F Tu 4 Testsandrequirementsforposttensioninganchorages 4.1General 4.1.1Purpose Itisthepurposeofthetestproce

32、durestostandardizetherequiredmechanicaltestsforposttensioning systems.Thestipulatedrequirementspertaintothedescribedtests.FiguresaregiveninannexA. 4.1.2 Specificationofsystem Priortotesting,theprincipaldetailsoftheprestressingsystemshallbemadeknownasfarastheyrelateto thetests,e.g.bythetechnicalrepor

33、torspecificationofsystem. 4.1.3 Laboratory,testingfacility Generally,thetestsshallbeperformedbyanindependentandnotifiedlaboratory.However,facilitiesprovided bytheapplicantmaybeused,ifthetestsareexecutedunderthesurveillanceandresponsibilityofsucha laboratory. 4.1.4 Materialsandcomponentsforthetests A

34、lltestsshouldbeperformedwiththetypeandgradeofprestressingsteelandwiththeanchorage componentsasintendedforapplication.Iftheanchoragetobeusedrequiresmechanicaltreatmentofthe prestressingsteel,theeffectsofsuchtreatmentshouldbeconsideredandjustified. Thegeometricalandmechanicalpropertiesofanchoragecompo

35、nentsaswellasthetolerancerangeof dimensionsshallbemadeknown. Fortheloadtransfertestthegradeofconcretefortheapplicationoftheposttensioningsystemshallbeas definedinthespecifications.Thegradeofconcreteisspecifiedbyitscharacteristiccompressiveconcrete strengthat28days, f ck ,thisbeingdeterminedinaccorda

36、ncewithrelevantstandards.Theminimumconcrete compressivestrengthatwhichfullprestresscanbeappliedonsiteshallbespecified.Itcanbedefinedeither asthemeancompressivestrengthf cm,o orastheminimumcharacteristiccompressivestrength, f ck,o ofthe concreteoftheanchoragezone.Thesevaluesareassumedtoberelatedtoeac

37、hotherby: f ck,o = f cm,o 8MPa. (Thepropertiesoftheconcreteforthespecimensaregivenin4.2.3.2and4.2.3.3) 4.1.5 Typesoftest Thetestsareperformedaccordingtothemethodofanchoringtheprestressingsteel.Adistinctionismade between:EN13391:2004(E) 7 Anchoragesformedbymechanicalmeans:theprestressingsteelisfixedt

38、oananchorageelementby meansofmechanicaldevicessuchaswedges,buttonheads,threads,etc.Anchoringmayalsobe achievedbyformingtheprestressingsteelinalooparoundasteelelement,etc. Bondanchorages:theprestressingsteelisanchoredintheconcretebeforethestressingforceisapplied tothetendon.Theanchoringmayeitherbeach

39、ievedbybondaloneorpartiallybyamechanicaldevice andpartiallybybond. Thetestspertaintotendonanchorageassembliesandanchoragezonesofbondedandunbonded,interioror exteriortendons.Couplings,whichconnecttwotendonstoformacontinuoustendon,shallbetestedinthe samewayasanchorageswithmechanicalmeans. Incarryingou

40、tatestitemsmayalsobecombined,forinstance: mechanicalanchoragecouplingmechanicalanchorage. mechanicalanchorageanchoragebybond. Threetypesoftestsaretobeperformed:staticloadtest,fatiguetestandloadtransfertest. 4.2Testingofsystemswithmechanicalanchorages 4.2.1 Staticloadtestwithtendonanchorageassembly 4

41、.2.1.1General Theaimofthetestistoassesstheperformanceofthetendonanchorageassemblyandtodetermineany decreaseofthebreakingloadoftheprestressingsteelduetotheinfluenceoftheanchorage.Thetestalso pertainstocouplers. 4.2.1.2 Testspecimen Thetendontobetestedshallbeassembledaccordingtotheenvisagedapplication

42、,usingallcomponents necessaryforanchoringthetendon.Componentsfortestingshallberandomlyselected.Thegeometrical configurationoftheindividualtensileelementsinthespecimenshallbeidenticaltothatofthespecified tendonassemblygivenintheEuropeanTechnicalApproval(ETA).Thefollowingdataofthetensileelements shall

43、beestablished: mainmechanicalandgeometricalpropertiesofthetensileelements,includingtheactualultimate strength; calculatedactualultimateforce F pm ; meantotalcrosssectionoftensileelements A pm ; surfacecharacteristicsoftensileelements. Relevantgeometricalandmechanicalpropertiesofanchoragecomponentsshallalsobedetermined.Thefree lengthofthetensileelementsinthetendonspecimentobetestedshallnotbelessthan3,0m,exceptforbar tendonswithaminimumlengthof1,0m.Ifmorethanonegradeoftensileelementsofthesametypeistobe usedwiththesametypeofanchorage,thetestsshallbeperformedusingthegradewiththehighest chara