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1、三峡大学硕士学位论文AbstractPre-stressedconcreterectangularaqueductisoneofthecommonlyusedaqueductconstructionstructuresinChina.However,withtheincreasingsizeoftheaqueduct,thecomplexityofaqueductstresswillbeenhanced.Therefore,it'snecessarytoinvestigatethevariationsthereinsothatallstructuralcomponentscangi
2、vefullplaytoitsownmechanicalpropertiestoachievestructuralsafety,economyandreasonabledesigngoal.Asatechnologytoseektheoptimaldesign,structuraloptimizationhasbeenthehottopicinthefieldofstructuraldesignsince1960.Byoptimizationdesign,thestructurescanachievethedemandofeconomyandsafety,whichhasimpor
3、tantengineeringsignificanceandbroadprospectsfordevelopment.Thisthesis,basedonarectangularprestressedaqueductprojects,establishesparametricmodelingofaqueduct,optimizesitsstructurebyutilizingANSYSoptimizationdesignmodule,analyzesthestructureofthepriorandoptimizedaqueductandmakesaseriesofcomparis
4、onstudyonthestrainedcondition.Themainresearchcontentsarelistedasfollows:1)Three-dimensionalfiniteelementanalysisabouttheoriginaldesigningschemeofpre-stressedaqueduct.Byusingthelargecommercialfiniteelementanalysissoftware-ANSYS,thisthesisestablishesthree-dimensionalfiniteelementmodelbasedontheo
5、riginalschemeofaqueductandanalyzesthestaticanddynamicforcesunderfourworkingconditions,whichareanhydrous,designdepth,fullslotdepth(temperatureup)andfullslotdepth(temperaturedown).Theresultsshowthatthestressoftheaqueductstructureandstrainindicatorcannotonlymeetthestandardrequirementbutalsoiscons
6、ervative,whichdemonstratesthatthereisdevelopingspaceinthestructureoptimizationfortheoriginaldesigningscheme.2)AqueductstructureoptimizationdesignbasedonANSYSsoftware.ThebasicideaoftheANSYSstructureoptimizationdesignissketched.Groundedontheoriginalscheme,threeprioritizationschemesareoptimizedby
7、usingtheANSYSoptimizationdesigningmodulewithprestressedreinforcementandsectionaldimensionasoptimizationvariables.Thenthroughthecomparisonofsafetyperformanceandconstructioncost,theauthortriestofindthebetterdesigningscheme,whichpossessess
