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1、EngineeringStructures33(2011)1817–1827ContentslistsavailableatScienceDirectEngineeringStructuresjournalhomepage:www.elsevier.com/locate/engstructAccuratemodelingofjointeffectsinlatticetransmissiontowersW.Q.Jianga,Z.Q.Wanga,G.McClureb,∗,G.L.Wangc,J.D.GengdaEnergy&PowerEngineeringSchool,NorthChinaElec
2、tricPowerUniversity,BaoDing071003,ChinabDepartmentofCivilEngineeringandAppliedMechanics,McGillUniversity,Montreal,CanadaH3A2K6cGuizhouElectricPowerDesignResearchInstitute,Guizhou550002,ChinadChinaElectricPowerResearchInstitute,Beijing102401,ChinaarticleinfoabstractArticlehistory:LatticeTransmissiont
3、owersarevitalcomponentsofoverheadtransmissionlineswhichplayanimportantReceived16September2010roleintheoperationofelectricalpowersystems.AccuratepredictionofthestructuralcapacityoflatticeReceivedinrevisedformtowersunderdifferentfailuremodesisveryimportantforaccurateassessmentofthereliabilityof19Febru
4、ary2011transmissionlinesandpowergrids,andfordesignofefficientfailurecontainmentmeasures.Traditionally,Accepted21February2011latticetowersareanalyzedasidealtrussesorframe-trusssystemswithoutexplicitlyconsideringloadingAvailableonline23March2011eccentricitiesandslippageeffectsinboltedjoints.Sucheffect
5、sarealwaysobservedinfull-scaletowertestsandintroducegreatdifferencesintheultimatebearingcapacityandfailuremodesobtainedfromKeywords:classicallinearanalysismodels.Inthispaperexperimentalresultsavailablefromfull-scaleprototypetestsLatticetransmissiontowerJointeccentricityofasingle-circuit110kVandasing
6、le-circuit220kVlatticetransmissiontowerssubjectedtodifferentloadBoltedjointslippagecasesarepresentedandcomparedwiththoseobtainedfromfourseriesofnumericalmodelsthatincludeBearingcapacityjointeccentricityeffectsanddifferentjointslippagemodels.ThenumericalsimulationresultsconfirmPushoveranalysisthatjoi
7、ntslippagedramaticallyincreasesthedeformationofthelatticetowers,whileitsinfluenceonload-bearingcapacitywillvaryindifferentloadcasesaccordingtothemagnitudeofverticalloadingandthetowerfailuremode.Result
