Design of offshore steel structures(os-c101_2011-0

OFFSHORESTANDARDDETNORSKEVERITASDNV-OS-C101DESIGNOFOFFSHORESTEELSTRUCTURES,GENERAL(LRFDMETHOD)APRIL2011Theelectronicpdfversionofthisdocumentfoundthrough©[e-mail]orinformationaboutsubscriptionterms,[e-mail](AdobeFrameMaker)byDetNorskeVeritasThisservicedocumenthasbeenpreparedbasedonavailableknowledge,technologyand/orinformationatthetimeofissuanceofthisdocument,andisbelievedtoreflectthebestofcontemporarytechnology.TheuseofthisdocumentbyothersthanDNVisattheuser'ssolerisk.DNVdoesnotacceptanyliabilityorresponsibilityforlossordamagesresultingfromanyuseofthisdocument.FOREWORDDETNORSKEVERITAS(DNV)isanautonomousandindependentfoundationwiththeobjectivesofsafeguardinglife,propertyandtheenvironment,atseaandonshore.DNVundertakesclassification,certification,andotherverificationandconsultancyservicesrelatingtoqualityofships,offshoreunitsandinstallations,andonshoreindustriesworldwide,andcarriesoutresearchinrelationtothesefunctions.DNVservicedocumentsconsistofamongstotherthefollowingtypesofdocuments:—ServiceSpecifications.Procedualrequirements.—Standards.Technicalrequirements.—RecommendedPractices.Guidance.TheStandardsandRecommendedPracticesareofferedwithinthefollowingareas:A)Qualification,QualityandSafetyMethodologyB)MaterialsTechnologyC)StructuresD)SystemsE)SpecialFacilitiesF)PipelinesandRisersG)AssetOperationH)MarineOperationsJ)CleanerEnergyO)SubseaSystemsDETNORSKEVERITASOffshoreStandardDNV-OS-C101,April2011Changes–Page3CHANGES•GeneralThisdocumentsupersedesDNV-OS-C101,October2008.Thisupdateisbasedonexperienceandfeedbackgainedduring10yearssincefirsteditionofdocument.MainchangesinApril2011•General—Anumberofeditorialcorrectionsandclarificationshavebeenmade.•Sec.4StructuralCategorisation,MaterialSelectionandInspectionPrinciples—Insub-sectionelementD500anewparagraphhasbeenaddedconcerningPWHT.•Sec.9WeldConnections—ItemB203hasbeenamended,mainlylist-itema)concerningfullpenetrationweld.DETNORSKEVERITASOffshoreStandardDNV-OS-C101,April2011Page4–ContentsCONTENTSSec.1Introduction........................................................................................................................................8A.General............................................................................................................................................................................8A100Introduction...........................................................................................................................................................8A200Objectives.............................................................................................................................................................8A300Scopeandapplication...........................................................................................................................................8A400OtherthanDNVcodes..........................................................................................................................................8A500Classification........................................................................................................................................................8B.References.......................................................................................................................................................................9B100General..................................................................................................................................................................9C.Definitions.....................................................................................................................................................................10C100Verbalforms.......................................................................................................................................................10C200Terms..................................................................................................................................................................10D.AbbreviationsandSymbols..........................................................................................................................................13D100Abbreviations......................................................................................................................................................13D200Symbols..............................................................................................................................................................13Sec.2DesignPrinciples..............................................................................................................................16A.Introduction..........................................................................................................................................................