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1、L-．碩士學(xué)位論文ABSTRACTBasedonthepreliminarydesignofasingletowercable-stayedbridgeWithanarch—towercalledBenRiverBridgeinacity,themainstaticanalysisresults，dynamicanalysisandstabilitycalculationofthearch-towercable—stayedbridgeispresented．Thisthesisconcentrat
2、esonthedesignparametersandthegeometricnonlinearityofthearch-towercable—stayedbridge．Systematicalresearchiscarriedoutbyusingtheparameteranalysisandthefiniteelementmethodtoinvestigatetheinfluenceofthemainstructuraldesignparameters，suchastheratiobetweenth
3、eheightoftowerandthelengthofmainspan，thelengthofunsupporteddeckadjacenttotheendofmainspan，thelengthofunsupporteddeckadjacenttopylonandthestiffnessratiobetweengirderandpylon，onstructuraldisplacement，internalforceandtensionofcables，whenthebridgeisunderli
4、veload．Finally,theeffectsofgeometricnonlinearityonstructuralstaticbehaviorofarch·-towercable．-stayedbridgeunderthefirststageofdeadload，thesecondstageofdeadloadandliveloadrespectivelyareexamined．M1resultscanbereferencestothedesignofthesametypebridge．Int
5、histhesisthemainconclusionsareshowedinthefollowing：1．Parameteranalysisshowsthatwiththeincreaseoftheratiobetweentheheightoftowerandthelengthofmainspan，themomentsanddisplacementsofthekeysectionsofthemaingirderandpylonandthemaximumtensionofcablesexperienc
6、eagradualdecreasingtrend，howevertheabsolutevalueofnegativereactionofside—spansupportincreasetremendously．Also，withtheraiseofthelengthofunsupporteddeckadjacenttotheendofmainspan，themomentsofthemaingirderandpylondecreaseprogressively,butthemaximumdeflect
7、ionofthegirder，horizontaldisplacementatthetopoftowerandnegativereaction’Sabsolutevalueofside—spansupportincreaseprogressively．Especially,thetensionofcablesneartotheendofthegirderincreasesrapidly．Ⅱ碩士學(xué)位論文ABSTRACT2．WithtIleclimbofmelengthofunsupporteddeck
8、adjacenttopylon，thehoggingmomentofthegirderneartopylondropsmonotonously．Bycontrast，thelongitudinalmomentofthebottomofpylonhasaslowdescendingtrend．訛at’smore，withtheascentofthestiffnessratiobetweengirderandtower，themomentsofthemaingirder，
