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建筑毕业设计外文翻译及译文--大跨度FRP网架结构的展望和分析.doc

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建筑毕业设计外文翻译及译文--大跨度FRP网架结构的展望和分析.doc

中国石油大学(华东)本科毕业设计(论文)1DEVELOPMENTANDANALYSISOFTHELARGESPANFRPWOVENWEBSTRUCTUREABSTRACTANINNOVATIVELARGESPANSTRUCTURALSYSTEM,NAMELYTHEFRPWOVENWEBSTRUCTUREFRPWWS,ISINTRODUCEDINTHISPAPERINANFRPWWS,THEHIGHSTRENGTHFRPSTRIPSARE“WOVEN”LIKEBAMBOOSTRIPSINACHINESEBAMBOOMATTOFORMAPLANEWEBTHEOUTEREDGEOFTHEWEBISANCHOREDONANOUTERRINGBEAM,ANDANINNERRINGBEAMISPROVIDEDTOANCHORTHEFRPSTRIPSATTHECENTEROFTHEWEBTHESTIFFNESSOFTHEWEBTORESISTVARIOUSLOADSISDERIVEDFROMTHEINITIALPRESTRESSINGDURINGTHE“WEAVING”STAGEANDTHEADDITIONALTENSIONINGASARESULTOFTHEOUTOFPLANEMOVEMENTOFTHEINNERRINGBEAMASARESULTOFTHEHIGHSTRENGTHTOWEIGHTRATIOOFFRP,THISNEWSTRUCTURALFORMOFFERSANATTRACTIVEOPTIONFORTHECONSTRUCTIONOFSPATIALSTRUCTURESWITHSPANSLONGERTHANAREPOSSIBLEWITHCONVENTIONALSTRUCTURALMATERIALSINTHISPAPER,THEBASICLAYOUTANDCONSTRUCTIONPROCEDUREFORASIMPLEFRPWWSISFIRSTPRESENTEDTHREEBASICWEAVINGPATTERNSARENEXTEXPLAINEDSEVERALVARIATIONSOFTHEBASICSTRUCTURALSYSTEMAREALSOPROPOSEDASIMPLEMECHANICALMODELISPRESENTEDFORTHEDEFORMATIONOFINDIVIDUALFRPSTRIPSRESULTSFROMAFINITEELEMENTANALYSISOFANEXAMPLESTRUCTUREAREALSOGIVENTHERESULTSOFTHESEANALYSESCONFIRMTHEFEASIBILITYOFTHEFRPWWS1INTRODUCTIONFRPISANEWKINDOFSTRUCTURALMATERIAL,WHOSEUSEINCIVILENGINEERINGHASBEENACTIVELYEXPLOREDINRECENTYEARSDUETOITSFAVORABLEPROPERTIESLIKE中国石油大学(华东)本科毕业设计(论文)2CORROSIONRESISTANCE,HIGHSTRENGTH,LOWWEIGHT,GOODFATIGUEPERFORMANCE,ANDLOWMAINTENANCECOST,ITISCONSIDEREDTOBEANIDEALMATERIALFORCONSTRUCTINGLONGSPANSTRUCTURESINTHENEWCENTURYHOWEVER,ITSMECHANICALPROPERTIESAREDISTINCTLYDIFFERENTFROMTHOSEOFTRADITIONALSTRUCTURALMATERIALSINSOMEASPECTS,SUCHASITSANISOTROPYDUETOTHEUNIQUEPROPERTIESOFFRP,ITISNECESSARYTOEXPLORENEWFORMSOFLARGESPANSTRUCTURESFORITSEFFICIENTUSEANDFORACHIEVINGSPANSLARGERTHANAREPOSSIBLEWITHTRADITIONALMATERIALSFOREXAMPLE,MAEDAETAL2002HAVECONCEIVEDA5000METERSPANSUSPENSIONBRIDGEUSINGFRPTHEFRPWOVENWEBSTRUCTURE,ANEWLARGESPANSTRUCTURALSYSTEM,ISPRESENTEDINTHISPAPERTHISNEWSYSTEMREPRESENTSANATTEMPTAIMEDATTHEEFFICIENTUTILIZATIONOFTHEUNIQUECHARACTERISTICSOFFRPINALARGESPANROOFINANFRPWWS,THEHIGHSTRENGTHFRPSTRIPSAREWOVENLIKEBAMBOOSTRIPSINACHINESEBAMBOOMATTOFORMAPLANEWEBTHEOUTEREDGEOFTHEWEBISANCHOREDONANOUTERRINGBEAM,ANDANINNERRINGBEAMISPROVIDEDTOANCHORTHEFRPSTRIPSATTHECENTEROFTHEWEBASMALLSCALEMODELOFASIMPLEFRPWWSISSHOWNINFIGURE1THEFRPSTRIPSAREINITIALLYPRESTRESSEDTOALIMITEDEXTENTTOKEEPTHEMSTRAIGHTDURING“WEAVING”THEN,THEFRPWEBISTENSIONEDBYADISPLACEMENTOFTHEINNERRINGBEAMINTHEOUTOFPLANEDIRECTION,WHICHISEFFECTEDEITHERBYASETOFPRESTRESSEDTENDONSORBYSUSPENDINGAHEAVYMASSFROMTHEINNERRINGBEAMASARESULT,ATENSIONEDFRPWEB,WHOSEGEOMETRICSTIFFNESSISABLETORESISTAVARIETYOFLOADS,FORMSALARGESPANROOFSYSTEMWITHTHETWORINGSTHEFRPWWSRESEMBLESTHECABLENETSTRUCTUREANDTHECABLEMEMBRANESTRUCTURETHEIRMEMBERSAREFLEXIBLE;ANDTHEGEOMETRICSTIFFNESSRESULTINGFROM中国石油大学(华东)本科毕业设计(论文)3TENSIONISUTILIZEDTORESISTLOADSHOWEVER,THEFRPWWSHASITSUNIQUEADVANTAGES1THEFRPSTRIPSAREIDEALFORSUPERLARGESPANSTRUCTURESDUETOTHEIRLOWSELFWEIGHTANDTHEIRSUPERIORMATERIALPROPERTIESINTHELENGTHWISEDIRECTION,WHICHAREEFFICIENTLYUTILIZED,WHILETHEWEAKNESSOFINFERIORPROPERTIESINTHETRANSVERSEDIRECTIONSISNOTEXPOSED;2SIGNIFICANTDAMPINGCANBEEXPECTEDTOARISEFROMFRICTIONATJOINTSBETWEENFRPSTRIPS,WHICHCANENHANCETHERESISTANCEOFTHESTRUCTURETOWINDANDEARTHQUAKELOADS;3THEREGULARWEAVINGPATTERNLEADSTOANAESTHETICALLYPLEASINGSURFACE;AND4THECORROSIONRESISTANCEOFFRPANDTHEEASEOFINSTALLATIONBECAUSEOFITSLIGHTWEIGHTTRANSLATEINTOLOWMAINTENANCECOSTSINTHISPAPER,THEBASICLAYOUTANDCONSTRUCTIONPROCEDUREFORASIMPLEFRPWWSSYSTEMISPRESENTEDINDETAILTHEWEAVINGPATTERNSINPLANEARESUMMARIZEDINTOTHREETYPESSOMESPATIALFRPWWSFORMSFORPRACTICALAPPLICATIONSAREALSOPROPOSEDASIMPLEMECHANICALMODELFORINDIVIDUALFRPSTRIPSINTHEWEBISPRESENTEDRESULTSFROMTHEFINITEELEMENTANALYSISOFASIMPLEFRPWWSAREALSODESCRIBED2LAYOUTOFASIMPLEFRPWWSASIMPLEFRPWOVENWEBSTRUCTUREISCOMPOSEDOFAFRPWOVENWEB,ANOUTERRINGBEAMANDANINNERRINGBEAMFORANCHORAGE,ANDANADDITIONALWEIGHTORASETOFPRESTRESSEDTENDONS,ASSHOWNINFIGURE1THEWEBISWOVENWITHFRPSTRIPS,ANDCFRPSTRIPSOROTHERHIGHPERFORMANCEHYBRIDFRPSTRIPSARESUGGESTEDCFRPSTRIPS,WHICHHAVE中国石油大学(华东)本科毕业设计(论文)4BEENWIDELYUSEDTOSTRENGTHENCONCRETESTRUCTURESINRECENTYEARS,AREMANUFACTUREDBYPULTRUSIONINGENERAL,WITHAFIBERVOLUMERATIOOFABOUT65THEPROPERTIESOFTWOREPRESENTATIVEPRODUCTSMADEINCHINAANDSWITZERLANDRESPECTIVELYARELISTEDINTABLE1THESTRIPSCANBECURVEDANDCIRCUMVOLUTEDDUETOTHEIRSMALLTHICKNESSATYPICALCFRPSTRIPWITHPROPERTIESSIMILARTOTHOSESHOWNINTABLE1ISABLETORESISTATENSILEFORCEOF400KNORMORE,WHILETHEWEIGHTOFA300MLONGSTRIPISLESSTHAN70KGINCOMPARISON,THESELFWEIGHTOFA300MLONGHIGHSTRENGTHSTEELCABLEWHICHCANRESISTTHESAMELOADISMORETHAN500KGTHESTRIPSAREARRANGEDINTOAPLANESURFACEOFASUITABLEPATTERNBYSOMEPREDEFINEDRULESINTHESIMPLESTWEAVINGPATTERN,EACHSTRIPPASSESOVERONECROSSINGSTRIPANDUNDERTHENEXTTOFORMAWEBLIKEAWOVENFABRICAPARTOFSUCHWEBISSHOWNINFIGURE2PONGETAL2004INAMOREGENERALCASE,THENUMBEROFSTRIPSMEETINGATAJOINTANDTHEANGLESBETWEENTHESESTRIPSARETHEBASICPARAMETERSOFAWEAVINGPATTERNTWOSTRIPSAT90TOEACHOTHERARESHOWNINFIG3A,THREESTRIPSAT60SHOWNINFIG3B,ANDFOURSTRIPSAT45SHOWNINFIG3CATTHEJOINTS,STRIPSCANBEFULLYINTERCONNECTEDBYADHESIVEBONDINGAFTERCOMPLETESHAPEFORMATIONORLEFTUNBONDEDSOTHATSLIDINGBETWEENSTRIPSISALLOWEDINTHELATTERCASE,THESTATICFRICTIONBETWEENSTRIPSCANCONTRIBUTETOTHESTIFFNESSUNDERSTATICLOADINGWHILETHESLIDINGFRICTIONCANCONSUMETHEKINETICENERGYOFTHESTRUCTUREUNDERDYNAMICLOADING3CONSTRUCTIONOFSIMPLEFRPWWS

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