ACI 408.2R-92 STATE-OF-THE-ART REPORT ON BOND UNDER CYCLIC LOADS

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1、ACI408.2R-92(Reapproved1999)STATE-OF-THE-ARTREPORTONBONDUNDERCYCLICLOADSReportedbyACICommittee408DenisMitchellRobertoLeon?ChairmanSecretaryWilliamC.BlackNeilM.HawkinsJackP.MoehleDavidDarwin*James0.Jirsa*KennethH.MurrayMohammadR.EhsaniDavidW.JohnstonMikaelP.J.OlsenRolfEligehausen*

2、LeRoyA.Lutz*TelvinRezansoff*FernandoE.FagundoJohnF.McDermottMorrisSchupackPeterGergely*S.AliMirzaPar-vizSoroushianNarendraK.Gosain*Member,Sub-CommitteeonRepeatedLoadEffectstChairmanandEditor-Sub-CommitteeonRepeatedLoadEffectsThisstate-of-the-artreportsummarizesthemostrecentresear

3、chonbond2.5-Factorsaffectingbondstrengthundercyclicbehaviorundercyclicloads.Thereportprovidesabackgroundtobondloadsproblems,discussesthemainvariablesaffectingbondperformance,and2.6--Summarydescribesitsbehaviorundercyclicloads.Twogeneraltypesofcyclicloadsareaddressed:high-cycle(fa

4、tigue)andlow-cycle(earthquakeandsimilar)loads.Thebehaviorofstraightanchorages,hooksandsplicesisincluded.Chapter3-BondbehaviorundercyclicloadsDesignrecommendationsareprovidedforbothhighandlowcyclefatigue,3.1-Highcyclefatigueandsuggestionsforfurtherresearcharegiven.3.2-Correlationb

5、etweenfatigueandsustainedloadingKeywords:anchorage;barslip;bond;bondmodels;cyclicloads;designrecommendations;developmentlength;fatigue;seismicloads;hooks;3.3-Lowcyclefatiguesplices3.4--InfluenceofcrackingonbondstrengthChapter4-AnchorageunderhighcyclefatigueCONTENTS4.1-Straightbar

6、anchorages4.2-HookedanchoragesChapterl-Introduction4.3-Splices1.l-Bond1.2-ScopeChapter5-Anchoragesunderlowcycleloading1.3-Terminology5.1-Straightbaranchorages5.2-HooksChapter2-Bondandanchorage5.3-Splices2.l-Bondstresses2.2-ComponentsofbondresistanceChapter6-Analyticalbondmodels2.

7、3-Failuremodes2.4-BondmechanismsChapter7-Designapproaches7.1-HighcyclefatigueACICommitteeReports,Guides,StandardPractices,andCommentariesareintendedforguidanceindesigning,ACI408.2R-92becameeffectiveAug.1,1992.Copyright01992,AmericanConcreteInstituteplanning,executing,orinspecting

8、constructionandinAlrightsreservedincludi