纜索承重橋梁非線性空氣靜力穩(wěn)定性研究.pdf

1、同濟大學博士學位論文纜索承重橋梁非線性空氣靜力穩(wěn)定性研究姓名：程進申請學位級別：博士專業(yè)：橋梁與隧道工程指導教師：項海帆肖汝誠2000.5.1—_●●_______———_______●__I____●_____●●____—●____●————————————一一StudyonNonlinearAerostaticStabifityofCableSupportedBridgesWiththeincreasingspanofbridge

2、s，aerostaticstabilityproblemsoflong—spanbridgeshavebecomeofgreatimportanceInthepresentdissertation，conventionaltheoriesandmethodsofaerostaticstabilityanalysesforlongspanbridgesarereviewedandthedeficienciesofthesetheories

3、andmethodsarepointedoutFurtherinvestigationofnonIinearaerostaticstabilitytheoryandmethodofcable—supportedbridgeshasbeencarriedoutThisresearchmainlyisfocusedonthefollowingaspects：Firstly，basedonthepreviousresearch，nonline

4、araerostaticstabilityanalysestheoryoflong—spanbridgesisestablished，inwhichthegeometricalnonlinearmaterialnonlinearandnODlinearinfluencecausedbyaerostaticloadhavebeenconsideredThistheorywillbecomethebasisofanalyzingnonlin

5、earaerostaticstabilityoflong—spanbridgesSecondly，basedonconsideringthegeometricalnonlinear，materialnonlinearandnonlinearinfluencecausedbyaerostaticload，afiniteelementapproachtocalculatedirectlythecriticalwindvelocityfort

6、henonlinearaerostaticst曲ilityoflong—spanbridgesispresented，inwhichtheinfluenceofcablesagisaccuratelyconsideredFortheconvenienceofknowingtheabilityagainstwindoflong—spanbridgeatthebeginningofdesign，practicalmethods，whicha

7、reusedtoanalyzenonlinearaerostaticstabilityofsuspensionbridgesandcomputelateralwindeffectforsuspensionbridges，arepresentedNonlinearinfluencescausedbyliftandpitchingmomentandgeometryareincludedinthesemethodsThirdly，basedo

8、nMs—FortranPowerstationV40，aWindows98／NTprogramcalledBNAPisdevelopedtoanalyzethenonlinearaerostaticstabilityofbridgesToacertaindegree，thisprogrammakesupthedeficiencyoflargenonlinearF脒programontheaerostaticstabilityanalys