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1、横隔板对波形钢腹板组合箱梁桥抗扭性能的影响AbstractPCboxgirderwithcorrugatedsteelwebshasagreatdealofadvantages,suchaslightself-weight,clearforce,higheffectiveprestres,shortconstruetionperiod,appearance,recyclingandreusing.Butitstorsionalpropertiesisinsufficient.Engineeringmostlyadoptsthediaphragmstoimprovethetor
2、sionalproperties.Inthispaper,theeffectofdiaphragmonthetorsionalpropertieswasstudiedfromtheviewofengineeringpractice.Themainresearchresultsareasfollows:(1)Thetestmodelsofboxgirderwithcorrugatedsteelwebsisdesignedandtested,andselectedreasonableunittypeandmaterialpropertiesofANSYSfiniteelement
3、simulation.TheresultsshowethattheANSYSfiniteelementmodelcalculationresultsandthetestbeamexperimentaldataanalysisresultsareinagreementwitheachother.Anditprovesthat,themodelingprocessofsteelwebplateconnectedtothetop,bottomrigidconnectionisfeasible,andtheANSYSmodeliscorrect.(2)Boxgirder’storsi
4、onisobviousunderpartialloadwithoutdiaphragmplate,thetorsionalperformanceispoorer.Adddiaphragmplatecanimprovethetorsionstiffness,butalsotocontrolthewarpingstressofconcreteandsteelwebplateshearstressisfavorable.(3)Increasethenumberofdiaphragmisimprovedtoacertainextentthetorsionalbehaviorofbox
5、beam,whenthediaphragmreachesacertainnumber,boxbeamtorsionperformanceincreaseslowlyreduced.Thediaphragmhasgreateffectontheheightspanratiocorrugatedsteelwebboxgirderislarger,lessimpactonthehighspanrelativelysmallboxgirder.Suggestionsofboxgirderwithcorrugatedsteelwebsasfaraspossibleinthedesign
6、ofheighttospanratioof1/14to1/9.Whenthehigh-spanratiogreaterthan1/9,itisrecommendedthecrossbeamarrangedas1,greaterthan1/14whenthespanratioislessthan1/9,theproposedamountofthecrossbeamarrangedas3,whenahigh-spanratioislessthan1/14recommendationarrangedtransversebulkheadsnumber5.(4)Thickdiaphra
7、gmcanreducethedistortionofboxgirderandincreasesthetorsionalproperties.Diaphragmstogetherthanthescatteredlayoutincreasemorefavorableoftorsionalpropertiesonboxgirderwithcorrugatedsteelwebsunderreversal.Itissuggestthatdiaphragmplatethicknessdesignforacorrug
