高拱壩的主要失效模式與失效風(fēng)險(xiǎn)研究.pdf

1、河海大學(xué)博士學(xué)位論文高拱壩的主要失效模式與失效風(fēng)險(xiǎn)研究姓名：陳在鐵申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：水工結(jié)構(gòu)工程指導(dǎo)教師：任青文20071201河海大學(xué)工學(xué)博士學(xué)位論文2007ABSTRACTABSTRACTHydroelectricivyisaformofre—generablecleanenergyChinaisrichinlaydroenergyresotlrcesandhydroelectricexploitationcallbeasol

2、utiontothelackofene耀Ⅳandtotheenvironmentalpollutioncausedbycoal—bumingelectricitygenerationLargedamsbelongtotheinfrastructureofthehvdroelectricexploitationandarllongthedamswiththeheightexceeding200m，whichareunderconstruc

3、tionorplannedtobeconstructedS00naremostly11i出archdamsThebasiccausesforthehigharchdamfailuremainlyinvolvesuchnaturalfactorsasfloods，earthquakes，closemotmtainlandslides，upstreamembankmentbursting，agingofdambodyandstructura

4、liointmaterial，abnormaltemperaturevariationdifferentialsettlementofthegroundwork，etc∞wellassuchanthropicfactorsaswars，terrorismattacks，ereThedamabutmentrockunstabilitydambodvinterface—alongunstabilityentireentityunstabil

5、ityexcesscrackingandextremedamoverflowarethemainfailuremodesoft11ehigharchdamsThemainfailuremodesarenottotallyindependentofoneanotherandintheactualcalcnlation，anytwoofthethree(damabutmentrockunstabilitydambodyinterface—a

6、longunstabilityentireentityunstability)canbedeemedtobemoderatelycorrelativeandthepertinencymustbetakenintoaccountOtherfailuremodesarelittleinterrrelatedandthuscanbedeemedasindependentofeachother0nthebasisofestablishingth

7、estatefunction，thenormalizationofrandomvariableequivalentandtheindependenttransforill，theprobabilitiesofthedarnabutmentrockunstabilitytheexcesscracking，entireentityunstabilitytheextremedamoverflowandthedambodvinterfaceal

8、ongunstabilityareworkedoutbymeansofJCmethodandMonteCadomethod；theprobabilityofthedamdestructioncausedbyhumanfactorisdeterminedbasedonthestudyofwarsandthestudyofanti—terrorismtogetherwithexpertdiscussion；afterconvertingth

9、eexcesscrackingfailureprobabilityaealculationisconductedbymeansof‘bimodule’’narrowextentformulaofthefailureprobabilityofthehigharchdaminvoIvingseveralentirelyindependentmainfailuremodesThedisasterdueto“曲archdamburstingin

10、volveslifelossaswellasdirect&indkecteconomiclosses，andtheriskratetheeconomiclossriskvalueandthelifelossriskvaluearethemajorindexesinassessingthehigharchdamriskTodeterminethecriterionforacceptableriskneedstotakeintocompre

11、hensiveaccountsuchfactorsasthedamburstingcalamitylOSStheadvantagesofhydroelectricitythecontributionrateofhvdroelectricitytothestateenergysourcethelirevaluetheimportanceattached，ete111eissueofdamconstructionshouldbeproper

12、lyconsideredataheightofstate&nationalexistenceanddevelopmentOnlywhenthebenefitfromriskreducingisfarlowerthanthecostorwhenmorelivesinothertradescallbesavedatthesanlepricecalltheexcessriskofthehigharchdambeacceptableneprob

13、abilitiesofshearslippingdamburstingandthedamburstingduetoinstabilityarecalculatedrespectivelyforJinpingHighArchDamandthebasicvalueorvalHerangeoftheacceptableriskrate，theacceptableeconomiclOSSriskvalueandtheacceptablelife