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1、波形钢腹板PC组合箱梁腹板剪切屈曲稳定性能研究AbstractThestructureofpre-stressedconcretecompositeboxgirderwithcorrugatedsteelwebhaveaadvantagethatmakefulluseofthepropertiesbetweenconcreteandsteelwebsandforceclearlysothatmanydesignersfromthedomesticandforeignfavoritverymuch.However,thedomestictheoreticalres
2、earchonthistypeofthebridgeisstillintheexploratorystage,andthepracticalengineeringapplicationisless,thedesignandconstructionlevelremainstobefurtherimproved.ShearBearingCapacityofcheckinginthepre-stressedconcretecompositeboxgirderwithcorrugatedsteelweb,Shearbucklingofcorrugatedsteelweb
3、splaysanirreplaceablecontrolfactor,Soitisextremelynecessaryforittobehavingqualitativeandquantitativeanalysis.Thispaperbasedontheanalysisofexistingresearchandengineeringdesignexamplesinthedomesticandforeign,ByusingthelargegeneralfiniteelementprogramANSYSandcombingwiththeexistingtheori
4、es,Thewebspacefiniteelementmodelisestablishedwithdifferentgeometricstructuralparameters.Atthesametime,Theauthordoesmuchlinearandnonlinearfiniteelementanalysisandcalculation.Theresearchresultscanprovideatheoreticalbasisforthesizedesignwithcorrugatedsteelwebsintheactualbridge,Themainco
5、mpletedworkisasfollows;1Onthebasisofinreadingalotofdomesticandinternationalresearchresultswhichisrelevanttothecompositebeambridge,consolidatingthecorrugatedsteelwebbucklingstabilitytheory,Summarizingthetheoreticalformulainlinearelasticbucklingstrengthabouttheweb’slocalbucklingstrengt
6、h,overallbucklingstrengthandsynthesisbucklingstrength.Andthenonlinearempiricalformulaconsideredplasticdeformation.2UsingANSYStoestablishthespacefiniteelementmodel,Intheprocessofmodelingassumptionsthatallshearisundertakenbythecorrugatedsteelwebs,Thatis,thewebisinpureshearstressstate,W
7、ebgeometrydimensionschangesonthebasisofreferencetoJuanchengYellowRiverBridge,Underideallinearelasticconditionsonanalysistheeigenvaluesbucklingofthestructure,respectivelyresearchingonwebwaveformshapechanges(Waveheight,Twistsandturnsangle,Straightplatelength),Platethickness,Webheightan
8、ddiaphragmdi