1、長(zhǎng)沙理工大學(xué)碩士學(xué)位論文高墩大跨徑連續(xù)剛構(gòu)橋施工階段穩(wěn)定性研究姓名：陳偉明申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：韋成龍劉小燕20090501ABSTRACTTrafficconstructionisdevelopingrapidlyinmountainousareasDuetestrictofthelandform，continuousrigidframebridgeswithhighpiersarewidelyusedinm

2、enntainousareasInconstructionstage，becauseofthefewrestrainsofthesebridges，theproblemofstabilityisveryremarkableThisthesisaimsatthestabilityofYesanheBridgeinitsconstructionstage，alongspancontinuousrigidframebridgewithhigh

3、piersinthewestofHubeiprovince，whichissituatedinthenationalhighwayfromShanghaitoChengduCityThemainresearchworkissummarizedasfollows：(1)Theresearchonstabilityofdouble1egthinwalledhighpiers：TakingNo3piersofYesanheBridgeasan

4、example，basedonenergyprinciple，theformulaofstabilitycoefficientofdouble1egthinwalledhighpiersarededucedTheyindicatethattheresultsobtainedbythemethodproposedinthisthesisagreewellwiththoseobtainedbyfiniteelementmethodBeam1

5、89finiteelementinANSYSbeingused，thefirstandsecondcategoryofstabilityproblemsofdouble—legthin—walledhighpiersareanalyzed，andthecontributionofthenonlinearitytostabilityisevaluated(2)Theresearchonstabilityoflongspancontinuo

6、usrigidframebridgewithhighpiersduringcantileverconstruction：Aimingatthestabilityoflong。spancontinuousrigidflamebridgewithhighpiersduringitscantileverconstruction，thisthesisinvestigatestheeffectsofseveraldominantfactors，s

7、uchasgeometricnonlinearitymaterialnonlinearityandconcretecrush，concretecrack，aggregateinterlocking，etc，uponthestabilitybymeansofthebucklingtheorythedeflectiontheorytheelasticityplasticitytheoryandthecollapsetheoryTheeffe

8、ctsoftheconstructionloadtypeandtherigidityoftiedbeamonthestabilityoflong。spancontinuousrigidframebridgewithhighpiersduringcantileverconstructionstagearediscussedindetailAnalysisandresearchresultsshowtheeffectfactorsofnon

9、linearitytherelationshipbetweentherigidityoftiedbeamandstructurestabilitycoefficient，andtheunsymmetricalconstructionloadsarereallydangeroustothestability(3)Theresearchonstabilityofhighpierwithinitialimperfections：Basedon