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1、SeismicreliabilityanalysisofurbanwaterdistributionnetworkVb1.5.No.1EARTHQUAKEENGINEERINGANDENGINEERINGVIBRATIONJune,2006ArticleID:1671??3664(2006)01??0071??07SeismicreliabilityanalysisofurbanwaterdistributionnetworkLiJie(李杰)I2t,WeiShulin(~書麟)andLiuWei(~0威)1.BuildingEn
2、gineeringDepartment,TongjiUniversity,Shanghai200092,China2.StateKeyLaboratoryforDisasterReductioninCivilEngineering,Shanghai200092,China3.ChinaConstruction(Shenzhen)DesignInternational,Shanghai200233,ChinaAbstract:Anapproachtoanalyzetheseismicreliabilityofwaterdistrib
3、utionnetworksbycombiningahydraulicanalysiswithafirst-orderreliabilitymethod(FORM),isproposedinthisPapeThehydraulicanalysismethodfornormalconditionsismodifiedtoaccommodatethespecialconditionsnecessarytoperformaseismichydraulicanalysis.Inordertocalculatetheleakageareaan
4、dleakingflowofthepipelinesinthehydraulicanalysismethod.anewleakagemodelestablishedfromtheseismicresponseanalysisofburiedpipelinesispresented.Tovalidatetheproposedapproach.anetworkwitll17nodesand24pipelinesisinvestigatedindetail.Theapproachisalsoappliedtoanactualprojec
5、tconsistingof463nodesand767pipelines.Theresultsshowthattheproposedapproachachievessatisfactoryresultsinanalyzingtheseismicreliabilityoflarge-scalewaterdistributionnetworks.Keywords:waterdistributionnetwo~;leakagemodel;hydraulicanalysis;FORM;seismiccapacityreliability1
6、Introductionwaterdistributionnetworks(WDNs).alongwithotherlifelinesystemssuchastransportationsystems,gastransmissionnetworks,ene唱ysupplysystems,etc.,areindispensabletoourdailylife.Unfortunately,theirfrangiblepertormancesduringmanypreviousstrongearthquakeshaveledtonume
7、rouslossesandcasualties.Therefore.studyoftheseismicreliabilityoftheWDN-一hasbecomeanimportantresearchtopicinearthquakeengineering.ThereliabilityofWDNsisgenerallyconcernedwiththeirabilitytoprovideanadequatelevelofservicetocustomers.underbothnorrnalandabnormalconditionsf
8、Goulter,1995).Ingeneral,thereliabilityanalysisisfocusedonabnormalconditions.includingthemechanicalfailureofpipe.orthehydraul
