1、BRITISH STANDARD BS EN 523:2003 Steel strip sheaths for prestressing tendons Terminology, requirements, quality control The European Standard EN 523:2003 has the status of a British Standard ICS 01.040.77; 77.140.75; 91.080.40 BS EN 523:2003 This British Standard, was published under the authority o
2、f the Standards Policy and Strategy Committee on 12 August 2003 BSI 12 August 2003 ISBN 0 580 42456 1 National foreword This British Standard is the official English language version of EN 523:2003. It supersedes BS EN 523:1997 which is withdrawn. The UK participation in its preparation was entruste
3、d by Technical Committee B/517, Concrete, to Subcommittee B/517/1, Concrete production and testing, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement internatio
4、nal or European 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 t
5、o include all the 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
6、 enquiries on the 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 17 and a
7、back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN523 August2003 ICS01.040.77;77.140.75;91.080.40 SupersedesEN523:1997 Englishversion
8、SteelstripsheathsforprestressingtendonsTerminology, requirements,qualitycontrol Gainesenfeuillarddacierpourcblesdeprcontrainte Terminologie,prescriptions,contrledequalit HllrohreausBandstahlfrSpanngliederBegriffe, Anforderungen,Gteberwachung ThisEuropeanStandardwasapprovedbyCENon11March2003. CENmemb
9、ersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember
10、. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgiu
11、m,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeSta
12、ssart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN523:2003EEN523:2003(E) 2 Contents page 1 Scope 3 2 Normativereferences 3 3 Termsanddefinitions. .4 4 Classification4 5 Requirements .4 6 Technicaldocuments,deliveryticket,mark
13、ingandlabelling. 9 7 Storage10 8 Proceduresfortheevaluationofconformity. .10 AnnexA (informative) Explanatorynotes. .13 AnnexZA (informative) ClausesofthisEuropeanstandardaddressingtheprovisionsoftheEU ConstructionProductsDirective 15EN523:2003(E) 3 Foreword ThisdocumentEN523:2003hasbeenpreparedbyTe
14、chnicalCommitteeCEN/TC104“Concreteandrelated products”,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestby February2004 ,andconflictingnationalstandardsshallbewithdrawnatthelatest by Februar
15、y2004 . ThisdocumentsupersedesEN523:1997. ThisdocumenthasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropean FreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s). ForrelationshipwithEUDirective(s),seeinformativeannexZA,whichisanintegralpartofthisdocument. ThisEu
16、ropeanStandardappliestogetherwiththestandardsoftheEN524serieswhichcomprisestestmethodsfor sheaths. AnnexAisinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,
17、Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom. 1Scope ThisEuropeanStandardisapplicabletouncoatedcylindricalsteelsheathswithacorrugatedprofileandwitha nominalinternaldiameterofupto130mman
18、dtheirconnectors(couplers)whichareassembledtoformductsfor prestressingtendonsinposttensionedprestressedconcretestructures.Itisonlyapplicabletosheathsand connectorsmadeofinterlockedorweldedsteelstrip 1) .Itdoesnotcoverplasticsheaths 2) . Thesealsrequiredbetweensheathsandcouplersarenotcoveredbythissta
19、ndard. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsap
20、plytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN5241, SteelstripsheathsforprestressingtendonsTestmethodsPart1:Determinationofshapeand dimensions. EN5242, Steelstripsheathsforprestre
21、ssingtendons Test methods Part 2:Determinationofflexural behaviour. 1) Incaseofcoatedorgalvanisedsteeladditionalrequirementsshouldbeconsidered,whicharenotcoveredbythis standard.Additionalrequirementsmayconformtotherelevantprovisionsintheplaceofuseoftheproduct. 2) Forplasticsheaths,seeannexA.EN523:20
22、03(E) 4 EN5243, SteelstripsheathsforprestressingtendonsTestmethodsPart3:Toandfrobendingtest. EN5244, SteelstripsheathsforprestressingtendonsTestmethodsPart4:Determinationoflateralload resistance. EN5245, SteelstripsheathsforprestressingtendonsTestmethodsPart5:Determinationoftensileload resistance. E
23、N5246,SteelstripsheathsforprestressingtendonsTestmethodsPart6:Determinationofleaktightness (Determinationofwaterloss). EN10139, ColdrolleduncoatedmildsteelnarrowstripforcoldformingTechnicaldeliveryconditions. ENV136701, ExecutionofconcretestructuresPart1:Common. ISO6932, Coldreducedcarbonsteelstripw
24、ithamaximumcarboncontentof0,25% . 3 Termsanddefinitions ForthepurposeofthisEuropeanStandardthefollowingtermsanddefinitionapply. 3.1 typeofsheath sheathsaredesignatedbythemanufactureraccordingtospecificdeliveryformhavingcertainfeatures,e.g. productionprocedure(weldedorinterlocked),shapeofprofile,etc.
25、 3.2 connectors(couplers) connectorsarespecificdevicestojoinsheathsections.Theyareusuallymadefromcutendsofsheathswiththe sameprofiletypebutwithlargerdiameter(see5.2) 3.3 stiffener isanadditionalcomponentswhosepurposeistoincreasethelateralloadstrengthofthesheathsatsupportingpoints, e.g.semicircularsh
26、eathingsectionsplacedbetweensupportsandtendons 4Classification SheathsareclassifiedbytherequirementsasgiveninTable1. Category1 (normalsheaths) Category2 (rigidsheaths) 5Requirements 5.1Sheaths 5.1.1General requirements Sheathsshallhavesufficientresistanceagainstthemechanicalactionsandenvironmentalex
27、posureduringstorage, transportandconstructionperiod.Sheathsaredeemedtoberesistantagainst: mechanicalactions,iftheyfulfiltherequirementsofclause5.1.5to5.1.8; environmentalexposure,iftherequirementsof5.1.2andclause7arefulfilledandthemeasurementsrecommended forhandlingthesheathsonsiteinaccordancewithEN
28、V136701aretakenintoaccount.EN523:2003(E) 5 Sheathsshallhaveacorrugatedprofile(seeFigure1)toprovideasufficientmechanicalbondwiththeconcrete externallyandthegroutinternally. Sheathsshallbeleaktight(see5.1.9).Thesheathsandtheirconnectorsshallbedesignedinsuchawayastoallow thispropersealingofthejoints. 5
29、.1.2 Steelstrip SheathsshallbemadefromrolledsteelstripconformingtoEN10139,ISO6932orspecifiedsteelwithsimilar properties.ThenominalthicknessofthesteelstripshallbenotlessthanthevaluesgiveninTable1,lines1aand1b. 5.1.3Tolerances (ovality) Deviationsfromthemeanvaluesoftheinternaldiameterofanycrosssection
30、ofthesheathsdeterminedaccordingto EN5241shallnotexceed1%or0,5mm,whicheveristhegreater. 5.1.4 Relativevolumeoftheprofile Therelativevolumeoftheprofile V rel determinedinaccordancewithEN5241shallbenotlessthan0,08cm 3 /cm 2 . Fornominalinternaldiametersgreaterthan25mm,theheightoftheprofileshallbenotles
31、sthan2,5mm(see EN5241). 5.1.5 Flexuralbehaviour Therelativeload F rel = F pl /d 1 inN/mmandtheload F pl atthebeginningofplasticdeformationshallbedeterminedin accordancewithEN5242. Therelativeload F rel forcategory2shallnotbelessthanthegivenvaluesinTable1,line2. Forcategory1therearenorequirementsbutt
32、estresultsshallbegivenforinformationtotheuserintherelevant documents(see6.2). 5.1.6Flexibility WhentestedbymeansofthetoandfrobendingtestdescribedinEN5243,flexibilityissufficientif,afterthebending test,nosignificantdeformationsofthecorrugationappearsothattheplungercanpushinthespecimenoveritswhole len
33、gth.Astraighteningofthespecimenbymeansofthetensileloadtest(seeEN5245)ispermitted. 5.1.7 Lateralloadresistance Theirreversiblereductionoftheinternaldiametershallnotexceed10%or5mmwhicheveristhesmallerwhenthe loadsgiveninTable1,lines4ato4careappliedaccordingtoEN5244.Ifanytypeofsheathsofclass1withstands
34、 theload F l =1500NwithoutastiffeneratestwithlowerforcesinaccordancewithTable1,line4aisnotrequired. 5.1.8 Tensileloadresistance WhenloadedinaccordancewithEN5245,thetensileloadstrengthissufficientifthesleevecoupling(comprising sheathsandthecorrespondingcoupler)doesnotfailbycompleteseparationunderthet
35、estloadsspecifiedinTable1, line5. 5.1.9Leaktightness WhentestedinaccordancewithEN5246,usingaspecimentestedearlierforflexibility,lateralloadresistanceand tensileloadresistance,thewaterlossshallnotexceedthevaluesgiveninTable1,line6.EN523:2003(E) 6 5.2Connectors (couplers) 5.2.1General requirements Cou
36、plersmadefromcorrugatedmetalstripsheathsshallfulfiltherequirementsgivenin5.1.1. 5.2.2 Minimumlength Thelengthofthecouplersshallbeatleastthreetimesthenominalinternaldiameterofthesheaths,butnotlessthan 150mm. 5.2.3 Nominalinternaldiameterandwallthicknessofthecouplers WhenmeasuredinaccordancewithEN5241
37、,thenominalinternaldiameterofthecouplers d 1,c shallnotexceeda valueof d 1,c = d 1,s +8 t s + c (forinterlockedsheaths) d 1,c = d 1,s +3 t s + c (forweldedsheaths) where(seealsoFigure1) d 1,s isthenominalinternaldiameterofthesheath(inmm) t s isthenominalwallthicknessofthesheath(inmm) c istheclearanc
38、ebetweentheoutersurfaceofthesheathandtheinnersurfaceofthecoupler,takinginto accounttheincreaseduetofoldsorseams(inmm) Key 1 Sheath 2 Coupler Figure1Dimensionsofcouplers Theclearance, c,shallnotexceed2,0mmforsheathswithaninternaldiameterofupto55mmor3,0mmforlarger diameters. Thesteelstripsfromwhichcou
39、plersaremadeshallatleastfulfiltheminimumrequirementsconcerningthewall thicknessasthesheathswhicharetobeconnected(seeTable1,lines1ato1b). 5.3Stiffeners Itshallbepossibletostrengthenlocallythosesheathswhichdonotpossesstheincreasedlateralloadresistance specifiedinTable1,line4b.Thesizeofthestiffenerssha
40、llnotexceedhalfthecircumferenceofthesheathandshall bedesignedsuchthat,afterconcreting,nocavitiesremainbetweenthesheathandthestiffenerwhichcouldhaveEN523:2003(E) 7 detrimentaleffects.Thisrequirementcanbemetforinstancebyusingthesameprofileandatleastthesamewall thicknessforstiffenerandsheath. Thelength
41、ofthestiffenersshallnotexceed1,5timesthenominalinternaldiameterofthesheathsor10 cm, whicheveristhegreater.EN523:2003(E) 8 Table1Minimumrequirements 1 234567891 01 1 Nominalinternaldiameter d 1 inmm Characteristic Category 25 over25 to35 over35 to45 over45 to55 over55 to65 over65 to75 over75 to85 ove
42、r85 to100 over100 to130 1a 1 0,20 0,25 0,25 0,30 0,30 0,35 0,35 0,40 0,40 1b Nominalthicknessofsteelstrip inmm 2 0,40 0,45 0,45 0,50 0,50 0,60 0,60 2 Relativeload F pl /d 1 inN/mm 2 3,0 3,5 4,0 4,0 4,5 5,0 5,5 6,0 6,5 3a 1 750 750 750 750 750 750 750 900 1000 3b Radius rfortheflexibilitytest, inmm(m
43、aximumvalues) 2 1500 1500 1500 1500 1500 1500 1500 1800 1800 4a without stiffeners 1 500 600 750 750 950 950 950 1050 1050 4b with stiffeners 1 1500 1500 1500 1500 1500 1500 1500 1500 1500 4c Lateralload F 1 inN without stiffeners 2 1500 1500 1500 1500 1500 1500 1500 1500 1500 5 Tensileload F 2 inN 1and2 250 400 600 900 1100 1400 1600 1900 2200 6 Tightness 1and2 Waterloss 1,5%byvolumeEN523:2003(E) 9 6 Technicaldocumen
