1、BRITISH STANDARD BS EN 12810-2:2003 Faade scaffolds made of prefabricated components Part 2: Particular methods of structural design The European Standard EN 12810-2:2003 has the status of a British Standard ICS 91.220 BS EN 12810-2:2003 This British Standard was published under the authority of the
2、 Standards Policy and Strategy Committee on 16 June 2004 BSI 16 June 2004 ISBN 0 580 43909 7 National foreword This British Standard is the official English language version of EN 12810-2:2003. The UK participation in its preparation was entrusted by Technical Committee B/514, Access and support equ
3、ipment, to Subcommittee B/514/21, Access and working scaffolds, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. This standard is published with National annex NA, which gives further information on the use of EN 1
4、2810-2:2003 in the UK. Cross-references The British Standards which implement international 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
5、Electronic Catalogue or of British Standards Online. This publication does not purport to 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
6、 to understand the text; present to the responsible international/European committee any 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
7、 comprises a front cover, an inside front cover, the EN title page, pages 2 to 28, an inside back cover and a 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 NORMEE
8、UROPENNE EUROPISCHENORM EN128102 December2003 ICS91.220 Englishversion FaadescaffoldsmadeofprefabricatedcomponentsPart2: Particularmethodsofstructuraldesign Echafaudagesdefaadecomposantsprfabriqus Partie2:Mthodesdeconceptionparticulireet dvaluation FassadengersteausvorgefertigtenBauteilenTeil2: Beso
9、ndereBemessungsverfahrenundNachweise ThisEuropeanStandardwasapprovedbyCENon4September2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferenc
10、esconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCent
11、rehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFO
12、RSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN128102:2003EEN128102:2003(E) 2 Contents page 1 Scope 4 2 Normativereferences
13、4 3 Termsanddefinitions. .4 4 Structuraldesign . 4 4.1 General4 4.2 Modelsforstructuralanalysis 6 4.3 Testsonconfigurationsandconnectiondevices 10 4.3.1 Testsforstiffnessandresistance 10 4.3.2 Vibrationtest 10 4.4 Testsonarepresentativesectionofasystemconfiguration. 11 4.4.1 General11 4.4.2 Type1tes
14、tforverificationofsignificantloaddisplacementbehaviour11 4.4.3 Type2testfortheverificationoftheelasticbucklingloadfactor a cr .13 4.4.3.1Testassembly .13 4.4.3.2Testprocedure . .13 4.4.3.3Validationof a cr 14 AnnexA (normative) Typicaltestsforconnectiondevicesandconfigurations 15 AnnexB (normative)
15、Droptestsforplatformsandtheirsupports 21 AnnexC (normative) Repeatedloadingtestsforweldedaluminiumtreads.23 Bibliography 24EN128102:2003(E) 3 Foreword Thisdocument(EN128102:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC53“Temporaryworks equipment”,thesecretariatofwhichisheldbyDIN. ThisEuropeanStanda
16、rdshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJune2004,andconflictingnationalstandardsshallbewithdrawnatthelatestby June2004. AnnexesA,BandCarenormative. ThisEuropeanStandardwillsupersedetheEuropeanHarmonisationdocumentHD1000:1988“Servic
17、eand workingscaffoldsmadeofprefabricatedelements;Materials,dimensions,designloadsandsafetyrequirements“. ThisEuropeanStandardisoneofaseriesofstandardsaslistedbelow. EN128101, FaadescaffoldsmadeofprefabricatedelementsPart1:Productspecifications . EN128102, FaadescaffoldsmadeofprefabricatedelementsPar
18、t2:Particularmethodsofstructuraldesign. EN128111, TemporaryworksequipmentPart1:ScaffoldsPerformancerequirementsandgeneraldesign. prEN128112, TemporaryworksequipmentPart2:Informationonmaterials. EN128113:2002, TemporaryworksequipmentPart3:LoadTesting. AccordingtotheCEN/CENELECInternalRegulations,then
19、ationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN128102:
20、2003(E) 4 1Scope ThisEuropeanstandardappliestofaadescaffoldsystemsconformingwithEN128101.Itdefinesrulesforthe structuralanalysisanddesignofthesesystemsbycalculationandtesting,inadditiontothosedefinedin EN128111,prEN128112,EN128113andEN 128101. BasicrequirementsaregiveninENV199311andENV199911. 2 Norm
21、ativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEurop
22、ean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN128101:2003, FaadescaffoldsmadeofprefabricatedcomponentsPart1:Productspecifications. EN128111, TemporaryworksequipmentPart1:ScaffoldsPerformancereq
23、uirementsandgeneraldesign. prEN128112, TemporaryworksequipmentPart2:Informationonmaterials. EN128113:2002, TemporaryworksequipmentPart3:LoadTesting . 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninEN128101andEN128111apply. 4 Structuraldesign 4.1General Struct
24、uraldesignofthesystemconfigurationsofthestandardsetofeachprefabricatedscaffoldsystemshallbe carriedoutinaccordancewiththerequirementsofEN128111,prEN128112andEN128113andEN128101 andthisEuropeanStandard. ThestructuraldesignshallfollowoneofthepathsinTable1,seealsoFigure1.EN128102:2003(E) 5 Table1Stages
25、ofthestructuraldesign Path1 Path2 Design stage Modularandframesystems Framesystemsonly 1 Testsforconfigurations,connectiondevicesandcomponents 2/3 Calculationforeachsystemconfigurationofthestandardset Determinationof a cr 2 Continuationofpath2onlyif a cr 2; if a cr 2changetopath1 Analysisofthestruct
26、uretodeterminethedistributionofforcesandmomentsusing 3a Secondordertheory Firstordertheorywithamplificationfactorsonthebasisof a cr 3 3b Analysisoftheindividualcomponentsandconnectiontoverifythattheresistanceisadequate Onetestonarepresentativesectionofasystemconfiguration 4 Type1 Fortheverificationo
27、fsignificantload displacementbehaviour Type2 Fortheverificationof a cr a cr isthelowestelasticbucklingloadfactortobeappliedtothedesignloads Path1isthepreferredpath.Path2mayonlybeusedforframesystemsandonlywhenthequotient a cr isnotless than2. Stages2and3shallbecarriedoutforeachsystemconfigurationofth
28、estandardsetinaccordancewiththe requirementssetoutinclause8ofEN128101:2003. Stage3bshallincludetheanalysisofallcomponentsandtheconnectiondevicesconsideringtheirmost unfavourableloadingsituation.Ifmemberimperfectionshavenotbeenincludedintheanalysismodel,component stabilityshallbecheckedseparately. Fo
29、rthedeterminationofinternalforcesandmoments,elasticmethodsshallbeused.Thenonlinearstructural characteristicsofmodularnodesandhorizontalplanes,determinedinaccordancewiththerequirementsof EN128113,shallbeusedintheanalysis. Theloadbearingcapacityofasystemconfigurationisreachedif eitherforonecrosssectio
30、n,theresistanceinaccordancetoEN128111isreached; ortheresistanceofacomponent,ofaconnectiondeviceorofaspringisreached. NOTE Suchresistancesareevaluatedfromtestresults. Inpath1,theequilibriumofthedisplacedsystemshallbetakenintoaccountdirectlybytheuseofasecondorder analysis.Inpath2,theequilibriumofthedi
31、splacedsystemshallbetakenintoaccountindirectlybytheuseofafirst orderanalysiswithamplificationfactors. Atestatstage4shallbecarriedoutonarepresentativesectionofasystemconfiguration.EN128102:2003(E) 6 4.2 Modelsforstructuralanalysis Thearrangementofhorizontalandverticalcomponents,thedispositionandfrequ
32、encyofbracingcomponents,and thepositionandfrequencyoftiesshallbeinaccordancewiththeproductmanual. Figure2showsatypicalsystemconfiguration.Thisspatialsystemshallbeconsideredeitherbycarryingouta threedimensionalanalysisorbysplittingitintoseparateplanarsystems,tobecheckedseparately,providedthat theinte
33、ractionbetweenthemisadequatelytakenintoaccount. Figure2alsoshowsexamplesofverticalplanesubstitutionsystemsnormaltothefacade.Figures3,4and5show anexampleofaverticalplanesubstitutionsystemparalleltothefaade. Inthetreatmentofanysubstitutionsystemtheboundaryconditionsshallbechosensothattheresponseofthe
34、substitutionsystemisrepresentativeofthebehaviourofthewholestructure. Therestraining,destabilisingandloadingeffectsofcomponents,notlyingintheplaneunderinvestigation,shallbe takenintoaccount.Inparticular,althoughthesystemliesinoneplane,outofplanebucklingshallbeexamined. Therelevantloaddeformationbehav
35、iouroftheconfigurationsandtheconnectiondevices,forinstancebetween transoms,ledgers,diagonalsandstandardsshallbeincorporatedintheanalysismodel. Linearisationbychordsinaccordancewith10.10ofEN128113:2002andassumptionsontheconservativeside arepermitted. Figure1Flowdiagramofthestagesofthestructuraldesign
36、EN128102:2003(E) 7 Figure2Examplesofplaneverticalsubstitutionsystemsnormaltothefaadefortheanchoragepattern shownEN128102:2003(E) 8 Figure3Developmentofasubstitutionsystemparalleltothefaade(KeyseeFigure5) Figure4DetailofFigure3(KeyseeFigure5)EN128102:2003(E) 9 Key F i ,; F a maximumforcesfromthescaff
37、oldaboveontheouterandinnerstandards n s numberofstandardstobestabilisedintheexample n t numberoftiemembersinthegroupofstandardstobestabilised I s momentofinertiaofastandard A s areaofastandard c h horizontalstiffnessparalleltothefaadeofonebay c t stiffnessofatiememberparalleltothefaade Key 1 facade
38、2 windloadsontheouterplane 3 windloadsontheinnerplane 4 innerplane: n s x l s ,n s xA s 5 outerplane: n s x l s ,n s xA s 6 springwiththestiffness( n s 1)x c b 7 springwiththestiffness n t x c t Figure5ExampleofaverticalsubstitutionsystemparalleltothefaadefortheconfigurationinFigure2EN128102:2003(E)
39、 10 4.3 Testsonconfigurationsandconnectiondevices 4.3.1 Testsforstiffnessandresistance TherequiredtestsshallbecarriedoutandtheresultsshallbeevaluatedinaccordancewithEN128113.Atleast fivetestsshallbecarriedoutforeachparameter. AnnexAgivesexamplesoftypicaltestsforconfigurationsandconnectiondevices. Wh
40、ereaconnectiondeviceorconfigurationissubjectedtoactionsinmorethanonedirection,thenanysignificant interactionbetweentheseactionsshallbetakenintoaccount. NOTE1 Typicallytheremaybeinteractionbetweennormalforceandbendingmomentinaconnectiondevice,butitis possiblefortheinteractiontooccurinmorethantwodirec
41、tions. Asaminimumrequirementthedesignresistance R d undereachoftherelevantactionsshallbeseparately determinedinaccordancewiththerequirementsofEN128113andalinearinteractionequationusedtocheckthe connectiondevicesorconfigurations.Fortwoactionsthelinearinteractionformulaisgiveninexpression(1). 0 1 2 2
42、1 1 , d d S d Sd + R F R F (1) inwhich F Sd1 and F Sd2 arethedesignvaluesresultingfromtheactionsand R d1 and R d2 arethedesignvaluesoftheresistances. Thisisusuallyaconservativeapproach.ThestraightdottedlineshowninFigure6representsthisequation. Whentestsaremadeundercombinedactionsthenitmaybepossiblet
43、oshowthattheresultingfailurevalues(test results)lieabovethestraightline.Inthiscaseasuitableapproximationmaybeusedtorepresenttheinteraction curve.Asanexample,inFigure6theheavycurveshownisgivenbytheexpression(2). 0 1 2 2 2 1 1 , d Sd d Sd + R F R F (2) Theexperimentallyderivedcharacteristicvaluesshalllieonoroutsidetheinteractioncurve. NOTE2 Forsomemodularconnectiondevices,dependingonthedetailsoftheconstruction,axialforcei
