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基于ANSYS对FRP加固梁的非线性分析
基于ANSYS对FRP加固梁的非线性分析
Abstract
Fiber-reinforcedpolymer(FRP)materialshavebecomeapopularchoicefortherepairandstrengtheningofexistingreinforcedconcretestructuresduetotheirhighstrength,durability,andcorrosionresistance.Inthisstudy,anonlinearfiniteelementanalysiswasconductedusingANSYSsoftwaretoinvestigatethebehaviorofareinforcedconcretebeamstrengthenedwithexternallybondedFRPsheets.TheresultsshowedthattheFRPstrengtheningeffectivelyincreasedtheloadcarryingcapacityofthebeamandimproveditsoverallperformance.ThestudyprovidesusefulinsightsforthedesignandevaluationofFRPretrofittedconcretestructures.
Introduction
Reinforcedconcretestructuresarewidelyusedintheconstructionindustryduetotheirhighstrength,durability,andlow-cost.However,thesestructuresmayexperiencedegradationovertimeduetoenvironmentalfactorssuchascorrosion,exposuretoharshweatherconditions,andaggressivechemicals.Thiscanresultinareductionintheloadcarryingcapacity,cracking,andultimatelyfailureofthestructure.Toaddressthisissue,differentrepairandstrengtheningtechniqueshavebeendeveloped,withexternallybondedFRPsheetsbeingoneofthemostpopularchoices.FRPstrengtheningoffersseveraladvantages,includinghighstrength-to-weightratio,corrosionresistance,andeasyapplication.
Inthisstudy,weconductedanonlinearfiniteelementanalysisusingANSYSsoftwaretoinvestigatethebehaviorofareinforcedconcretebeamstrengthenedwithexternallybondedFRPsheets.TheobjectivesofthestudyweretoevaluatetheeffectivenessofFRPstrengtheninginimprovingtheload-carryingcapacityofthebeamandtoassessitsoverallperformanceunderdifferentloadingconditions.
MaterialsandMethods
ThebeamwasmodeledusingANSYSsoftware,andthematerialpropertiesofthedifferentcomponentsweredefinedaccordingtotheirrespectivestandards.Thesizeofthebeamwas2000mm×200mm×200mm,andthereinforcementratiowas0.01.Theconcretestrengthwasassumedtobe30MPa.TheFRPsheetsweremodeledasanisotropicmaterialwithatensilestrengthof1400MPaandmodulusofelasticityof50GPa.
Thebeamwassubjectedtofour-pointbendingandtheloadwas