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1、拋物線型單層柱面網(wǎng)殼非線性穩(wěn)定性研究Abstractsingle-layercylindricalreticulatedshellisacommonstructuralformoflargespanroofstructures,thedifferenceintheformofthearchalignmentwouldresultinthedifferenceinthemechanicalbehaviorofthestructure.Inpracticalengineering,thesingle-layercylindric
2、alreticulatedshelliswidelyusedforitsgracefulshapeandeasily-construction,therefore,someothermorereasonablesingle-layercylindricalreticulatedshellsofdifferentarchlinewithbettermechanicalbehaviorareignored-suchastheparabolicsingle-layercylindricalreticulatedshellandth
3、einvertedcatenarysingle-layercylindricalreticulatedshell.Basedonthepresentsituation,thestaticstabilityoftheparabolicsingle-layercylindricalreticulatedshellisanalyzedandstudiedinthispaper.(1)Fortheparabolicsingle-layercylindricalreticulatedshellswithdifferentformsof
4、gridlayout,theirultimatebearingcapacityarecomparedtodeterminethemostreasonableformofgrid.(2)withthereasonableformofgridlayout,thestaticstabilityoftheparabolicsingle-layercylindricalreticulatedshelliscomparedwiththesingle-layercylindricalreticulatedshellandtheinvert
5、edcatenarysingle-layercylindricalreticulatedshell.(3)Alargescaleparameteranalysisiscarriedoutontheparaboliccylindricalreticulatedshell,theparametersinclude:length-spanratio,raise-spanratio,membersectiondimension,asymmetricloaddistribution,initialgeometricimperfecti
6、onandsettlementofsupport,etc.Then,anoptimizeddesignfortheparabolicsingle-layercylindricalreticulatedshellisconducted.Unlikepreviousoptimizationapproachesinwhichtrussiswidelyused,theoptimizeddesigninthisstudyisfocusedonthelayoutofthegrids,includingtheobliquerodinter
7、sectionangleandthegridspacelayout.Researchshowsthat:fortheparabolicsingle-layercylindricalreticulatedshell,thethree-dimensionalgridlayouthasthebeststabilityperformance,comparedwiththetraditionalcylindricalreticulatedshell,boththestiffnessandtheultimateloadofthepara
8、bolicsingle-layerreticulatedcylindricalshellandtheinvertedcatenarysingle-layercylindricalreticulatedshellgreatlyenhance.Raise-spanratioandlength-
