输电铁塔节点滑移分析

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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&PowerEngineeringScho

2、ol,NorthChinaElectricPowerUniversity,BaoDing071003,ChinabDepartmentofCivilEngineeringandAppliedMechanics,McGillUniversity,Montreal,CanadaH3A2K6cGuizhouElectricPowerDesignResearchInstitute,Guizhou550002,ChinadChinaElectricPowerResearchInstitute,Beijing102401,ChinaarticleinfoabstractA

3、rticlehistory:LatticeTransmissiontowersarevitalcomponentsofoverheadtransmissionlineswhichplayanimportantReceived16September2010roleintheoperationofelectricalpowersystems.AccuratepredictionofthestructuralcapacityoflatticeReceivedinrevisedformtowersunderdifferentfailuremodesisveryimpo

4、rtantforaccurateassessmentofthereliabilityof19February2011transmissionlinesandpowergrids,andfordesignofefficientfailurecontainmentmeasures.Traditionally,Accepted21February2011latticetowersareanalyzedasidealtrussesorframe-trusssystemswithoutexplicitlyconsideringloadingAvailableonline

5、23March2011eccentricitiesandslippageeffectsinboltedjoints.Sucheffectsarealwaysobservedinfull-scaletowertestsandintroducegreatdifferencesintheultimatebearingcapacityandfailuremodesobtainedfromKeywords:classicallinearanalysismodels.Inthispaperexperimentalresultsavailablefromfull-scale

6、prototypetestsLatticetransmissiontowerJointeccentricityofasingle-circuit110kVandasingle-circuit220kVlatticetransmissiontowerssubjectedtodifferentloadBoltedjointslippagecasesarepresentedandcomparedwiththoseobtainedfromfourseriesofnumericalmodelsthatincludeBearingcapacityjointeccentri

7、cityeffectsanddifferentjointslippagemodels.ThenumericalsimulationresultsconfirmPushoveranalysisthatjointslippagedramaticallyincreasesthedeformationofthelatticetowers,whileitsinfluenceonload-bearingcapacitywillvaryindifferentloadcasesaccordingtothemagnitudeofverticalloadingandthetowe

8、rfailuremode.Result