沉管隧道抗震數(shù)值分析.pdf

1、西南交通大學碩士學位論文沉管隧道抗震數(shù)值分析姓名：陳貴紅申請學位級別：碩士專業(yè)：防災減災工程及防護工程指導教師：高波2002.3.1西南交通大學碩士研究生學位論文第1|頁ABSTRACTBecauseofitsadvantagesintraversingthechannels，withthedevelopmentofthenationaleconomyimmersedtunnelswillinevitablybeusedasthemai

2、nmeansoftraversingrivers，baysandseabedsInthecitiesdividedbyriversoverbays，immersedtunnelshavegreatsuperioritiesinconnectingthedifferentpartsHowever，immersedtunnelsaregenerallybuildinsoftsoilshallowlyandaffectedgreatlybyt

3、heearthquakeInviewofitsimportanceandunderwaterparticularity，thedestructionofimmersedtunnelswillbedisastrousAccordingly，itisnecessarytocarryoutearthquake—resistantresearchofimmersedtunnelsCurrently，researchersfromhomeanda

4、broadusuallyusesimplifiedmodelsintheaseismaticanalysesofimmersedtunnels，whichcannotproperlysimulatethetwofunctionsofthesoil，whilethefiniteelementmethodsolvesthisproblemsuccessfullyandthedevelopmentofnumericcalculationand

5、computertechnologylaysasolidbasisforitsapplication，itisapitythattheapplicationsofFEMisnotcommoncurrentlyInthispapertakingNanjingChangjiangImmersedTunnelasanexample，theauthormadearesearchofaseismaticanalysesofimmersedtunn

6、elsbyintroducingFEM，andalso，madeafurtherdiscussionoffactorssuchasdepth，geologicconditions，waterandboundaryconditionsAnalyticresultsindicatethatthecalculationresultswithsimpleboundariesislargerthanthosewithviscousboundari

7、es，thatitisadequatethatthetransversecalculationrangeistakenassixtimesofthediameterofthetunnelwithsimpleboundaries，thatitisaccurateenoughtoanalyzethetransverseseismicresponsewithplanarmodels，thattheseismicresponseofimmers

8、edtunnelsincreaseswiththeincreasementofdepthanditiSgreatinhardrock，andthatthecouplingofwaterandstructureshasalittleinfiueneeontheseismicresponseofimmersedtunnelsTheconclusionsofthispaperCanbeusedasareferenceinearthquaker