CreepofconcretemasonrywallsstrengthenedwithFRPcompos砌体、有限元、数值分析ConstructionandBuildingConstructionandBuildingMaterials19(2021)181–187MATERIALS/locate/conbuildmatCreepofconcretemasonrywallsstrengthenedwithFRPcompositesD.D.Stierwalta,H.R.HamiltonIIIabb,*ReidMiddleton,Anchorage,AK,USADepartmentofCivilandCoastalEngineering,UniversityofFlorida,365WeilHall,P.O.Box116580,Gainesville,FL326116580,USAReceived15October2021;receivedinrevisedform23June2021;accepted6July2021Availableonline1September2021AbstractTheobjectiveoftheresearchwastoexaminethecreepbehaviorofmasonrywallsstrengthenedwithFRPcompositescomparedtothatofconventionalreinforcement.Eightfull-scale(40inwideby96intall[1.02m2.44m])unreinforcedconcretemasonrywallswereconstructedfortestinglong-termdeectionsout-of-plane.ThewallswerestrengthenedwithexternallybondedCFRPorGFRPcomposites.Twoadditionalwallswereconstructedwithmildsteelreinforcementgroutedinthecentercellofthespeci-mens.Long-termdeectionsduetocreepinFRPreinforcedwallswereshowntobe%22–56%higherthanthoseofsteelreinforcedwalls.2021ElsevierLtd.Allrightsreserved.Keywords:FRP;Concretemasonry;Creep1.IntroductionFiber-reinforcedpolymer(FRP)compositescanpro-videalightweight,economicalternativetotraditionalbuildingmaterialsforbothnewmasonryconstructionandstrengtheningofexistingmasonrystructures.Oneparticularusethatisgrowinginpopularityisinstrengtheningofmasonrybasementwallsthatareunderduressfromlateralsoilandgroundwaterloads.Thesustainedlateralloadsexpectedonthesebasementwallswillcausetime-dependentincreasesindeectionfrommasonrycreep.Thereislittleevidencethatbasementwallswithsteelreinforcementhaveseenproblemswithlong-termgrowthofout-of-planedeections.Inthesesystems,onlythemasonrycontributestothelong-termdeections.Itisnotknown,however,howmuchabondedFRPlaminatewillcontributetothesecreepdeectionsandiftheywillbecomeexcessive.Correspondingauthor.Tel.:+13523929537;fax:+13523923394.E-mailaddress:hrh@ce.u.edu(H.R.HamiltonIII).0950-0618/$-seefrontmatter2021ElsevierLtd.Allrightsreserved.doi:10.1016/j.conbuildmat.2021.07.001*2.CreepofmasonryCreepisaloadandtimedependentinelasticstrainundersustainedload.Creepproblemsinmasonryareusuallyassociatedwithhighcompressivestressesinthelowerwallsoftallmultistorybuildings.Shearwallsandexuralwallscarryearthquakeorextremewindloads,causingnolong-termstressesthatmightleadtocreep.Basementandretainingwalls,twoothercommonusesofstructuralmasonry,doresistsustainedlateralloadsfromsoilandgroundwaterpressure.Theexuralcreepincurredfromthesesustainedloadsresultsinin-creasedexuraldeformations.Littleinformationisavailableonthecreepofexuralwalls,whichislikelyduetothelackofproblemsthatareencounteredintyp-icalapplications.Structuralmasonryisgenerallyusedinbearingwallsandcolumnswherethemasonryexperiencesaxialcreepduetothesustainedgravityloadsorprestressing.Con-sequently,previousresearchonmasonrycreephasfo-cusedprimarilyonwallsundergravityorprestressloads.Furthermore,MSJC[1],theUSBuildingCode砌体、有限元、数值分析182D.D.Stierwalt,H.R.HamiltonIII/ConstructionandBuildingMaterials19(2021)181–187RequirementsforMasonryStructuresdoesnotaddresslong-termdeectionsduetocreepofreinforcedmasonryinexure,althoughitdoesaddressin-planeaxialcreep.3.CreepofcompositesIndividualbersofcarbon,glassandaramiddonotcreepsignicantly,butthematrixmaterialdoes[2].Themostcommontypeofcree...