生命线工程网络系统抗震可靠性分析

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1、同济大学土木工程学院硕士学位论文生命线工程网络系统抗震可靠性分析姓名：钱摇琨申请学位级别：硕士专业：结构工程指导教师：李杰20060301ABSTRACTLifelines．whichincludepowertransmission，transportation,andurbanwater,heat，gassupplypipelinesystems，arethefundamentalinfrastructuresystemstosupportmodemcities’functionsandmaintainregionaleconomicaldevelopme

2、nt·Therapiddevelopmentofmodemcitiesincreasestheirdependencesonlifelines．Thepost-earthquakepropertiesoflifelineengineeringsystemswoulddirectlydeterminetherecoveryofdailylifeandproductionaLswellastheefficiencyoffightingthesecondarydisasters．Thus，toensurethesafetyoflifelines，itisofgre

3、atnecessitytoanalyzetheirseismicreliabilities．Lifelinesextendspatiallyoverlargegeographicalregionstomakeupanetwork·Therefore，thereliabilityanalysisoflifelineengineeringsystemscanbetransformedtothecorrespondinganalysisofnetworksystems．Aswellknown，seismicreliabilityanalysisoflargesca

4、lelifelinenetworksisatypical‘NP—Hard’problemandithasbeenanimportantsubjectofconsiderableresearches．Thispapersystematicallyinvestigatestheadvantagesanddisadvantagesofsomepopularnetworkalgorithms诵tlltheirabilitiesofreducingcomputationcomplexasthecriterion．ResearchresuItsshowthatthemi

5、nimalpathbasedrecursivedecompositionalgorithmcanefficientlydecreasethecomputationcomplexandisseniortootheralgorithmsmfindingreliabilitysolutionsoflargescalenetworks．However,detailedinvestigationshaveshownthatitmaybeinapplicabletonetworkswhosecomponentshaveVe巧lowreliability．Inthispa

6、per'anewkindofalgorithmbasedonrecursivedecompositionalgorithmisstudied．Firstly,theharddiskstoragetechnologyisemployedtosolvetheproblemofthespacecomplexitycausedbydecompositioninthisalgorithm·Secondly,torealizetheanalysisofsystemswhenthecomponentsInthelowreliabilityregion，therecursi

7、vedecompositionandminimalcutsearchingmethodIStoproposearecursivedecompositionalgorithmbasedonminimalcutandthisalgorithmissuccessfullyputintothereliabilityanalysisoflifelineengineeringsvstcmsunderdestructiveearthquake．Itisconcludedthattheseismicreliabilityofnlifelinessufferingdiffer

8、entseismicintensitiescanbe