FRP筋及其增强砼的耐久性与寿命预测

:1004-8820(2005)01-0066-08FRP筋及其增强砼的耐久性与寿命预测刘志勇,吴桂芹,马立国,周新刚(烟台大学土木工程学院,山东烟台264005):讨论了一种新型纤维增强聚合物筋(FRP筋)的制备方法性能特点耐久性影响因素及性能劣化机理,分析研究了当前国外FRP筋及其增强砼的耐久性试验耐久性设计及寿命预测方法,提出了目前FRP筋及其增强砼耐久性及寿命预测研究中存在的问题和改进的研究方法及思路,为我国开展FRP筋增强砼的耐久性研究和建立相应的寿命预测模型提供参考.:;FRP;;;:TU53:A,,,,.,,,(FiberReinforcedPolymerFRP).FRP,FRP,,,.FRP,FRP,FRP,FRP,,FRP.FRP.,FRP,FRP,(1%~3%),,FRP,FRP,FRP:2004-07-17:(1966-),,,,,.181烟台大学学报(自然科学与工程版)Vol.18No.120051JournalofYantaiUniversity(NaturalScienceandEngineeringEdition)Jan.2005,.FRP,FRP,.,FRP,FRPFRP.1FRPFRP,.FRP,5~20m,,FRP60%~65%,,FRP,.FRP.,FRP,FRP.FRP,,.,FRP(CFRP)(GFRP)(AFRP)(HFRP).FRP,3~40mm.FRP,,FRP,GFRP,AFRP,CFRP;FRP,,FRP,;FRP,FRP;FRP,CFRPAFRP,GFRP,;FRP,;FRP,FRP[1].2FRPFRP,FRP;FRP;FRP.,,,,;67第1期刘志勇,等:FRP筋及其增强砼的耐久性与寿命预测(),,;,.,,,,,GFRP625%[2].FRP,,,,,Fick,;;,120105;Katz[3]FRP,100,,200~22010%,,GFRP,80,GFRP145165.,,,,,,FRP,,FRP,.1FRP2FRPFig.1FailuremodeofFRPspecimensubjectedtoacorubinationoftensilestressandenvironmentalinfluenceFig.2StrengthretentionrateofFRPspecimenexposuretotheenvironmentatdifferentstresslevelvstime,1,2FRP,FRP,FRP,68烟台大学学报(自然科学与工程版)第18卷,,,[4,5].3FRPFRP,FRP,,.FRP,GFRP,,GFRP,FRP.FRP,BankandGentry(1995)[6],FRP,Hayes(1998)[7].GFRPSiOSiO,,[8]:SiONa+H2OSiOH+NaOH,SiOSi+OHSiOH+SiO,SiO+H2OSiOH+OH.;,,,[8,9].,,,[10],.,.Machida[9],,,x=kt1/2x=kt.:(1);(2);(3);(4);(5).[11]4FRP4.1FRPFRP,,69第1期刘志勇,等:FRP筋及其增强砼的耐久性与寿命预测,,TGA()SEM()DSC()FTIR(Fourier),.Rah-man(1998)[12]GFRPCFRP,GFRPCFRP,30,5070,30%50%,45,122,370d,,SEM.(JSCE1997):,20~60,1,,;,.DejkeV[5]4GFRP,20,40,60,80,,,TGA,SEM/EDX.1Tab.1ReductionfactorsusedinexistingdesignguidelinestotakeaccountoftensilestrengthreductionduetoenvironmentalandsustainedstressinfluenceACI2000JSCE1997CHBDC1996NS3473BISEGFRP:0.70~0.80AFRP:0.80~0.90CFRP:0.90~1.00GFRP:0.77AFRP:0.87CFRP:0.87GFRP:0.75AFRP:0.85CFRP:0.85GFRP:0.50AFRP:0.90CFRP:1.00GFRP:0.80~1.0AFRP:0.50~1.0CFRP:0.90~1.0GFRP:0.80~1.0AFRP:0.70~1.0CFRP:0.90~1.0GFRP:0.30AFRP:0.50CFRP:0.60GFRP:0.70~0.80AFRP:0.80~0.90CFRP:0.90~1.00GFRP:0.77AFRP:0.87CFRP:0.87GFRP:0.60~0.75AFRP:0.42~0.85CFRP:0.76~0.85GFRP:0.40~0.50AFRP:0.63~0.90CFRP:0.90~1.00GFRP:0.30AFRP:0.50CFRP:0.60GFRP:0.14~0.16AFRP:0.16~0.18CFRP:0.44~0.50GFRP0.70AFRP0.70CFRP0.70GFRP:0.60~0.75AFRP:0.42~0.85CFRP:0.76~0.85FRP,FRP,FRP,70烟台大学学报(自然科学与工程版)第18卷FRPFRP,FRPFRP,FRP,FRP.,,,FRP.4.2FRPFRP,,1[5].FRP,.5FRPFRP,;FRP,,,FRP,.,,.Ar-rhenius,,,,.AF=exp[EaK(1Tenvir-1Tacce)](RHenvirRHacce)(TacceTenvir).,FickGFRP[5,13,14],,Fick,,,,FickFRP.FRP,,,,,Fick,,[15].6,FRP,,FRP71第1期刘志勇,等:FRP筋及其增强砼的耐久性与寿命预测,FRP[16],,FRP,FRP:(1)FRP,FRP,,FRP;(2)GFRP,CFRPAFRPHFRP,;(3),,FRP,;(4),,,.FRP,,,FRP,,FRP,FRP.:[1],.[J].,2003,33(8):59~60.[2],,.FRP[J].,2003,(3):96~99.[3]KatzA,BermanN,BankLC.EffectofcyclicloadingandelevatedtemperatureonthebondpropertiesofFRPrebars[A].ProceedingsfromtheFirstInternationalConferenceonDurabilityofFiberReinforcedPolymerCompositesforConstruction[C].Sherbrooke,1998.403~413.[4]DevalapuraRK,GauchelJV,GreenwoodME.Long-termdurabilityofglass-fiberreinforcedpolymercompositesinalkalineenvironments[A].Non-mentalic(FRP)ReinforcementforConcreteStructure.Pro-ceedingsofthethirdinternationalsymposium[C].Sapporo,1997,2:83~90.[5]DejkeV.DurabilityofFRPreinforcedinconcrete[D].Sweden:ChalmersUniversityofTechnology,2001.[6]BankLC,GentryTR,Acceleratedtestmethodstodeterminethelong-termbehaviourofFRPcompositestructure:environmentaleffects[J].JournalofReinforcedPlasticandComposites,1998,14:558~587.[7]HayesMD,GarciaK,VergheseN,etal.Theeffectsofmoistureonthefatiguebehaviorofaglass/vinylestercomposite[A].FiberCompositeonFiberCompositesinInfrastructureICCI98[C].Tucson,1998,(1):1~13.[8]JonesFR.Areviewofdeteriorationmechanismsofsewerrenovationmaterials[R].DeparmentofMeta-llury&MaterialsTechnologyUniversityofSurrey,GuildfordGU25XH,1984.[9]MachidaA.State-o-fthe-Artreportoncontinuousfiberreinforcingmaterials[R].Tokyo:SocietyofCivilEngineers(JSCE),1993.[10]ChinJW,NguyenT,AouadiK.Effectsofenvironmentalexposureonfiberreinforcedplasticmaterialsusedinconstruction[J].JournalofCompositesThchnologyandResearch,1997,19(4):205~213.72烟台大学学报(自然科学与工程版)第18卷[11],.[M].:,2003.238~247.[12]Rahman.ExperimentinvestigationofmechanismofdeteriorationofFRPreinforcementforconcrete[A].FiberCompositesinInfrastructure.ProceedingsofthesecondinternationalconferenceonfibercompositesininfrastructureICCI98[C].Tucson,1998,(1):501~511.[13]ShenC-H,SpringerGS.Moistureabsorptionanddesorptionofcompositematerials[A].EnvironmentalEffectsonCompositeMaterials[C].Westport:TechnomicPublishing,1981.15~33.[14]RostasyFS.OndurabilityofFRPinaggressiveenvironments[A].Non-metallic(FRP)ReinforcementforConcreteStructure.Proceedingofthirdinternationalsymposium[C].Sapporo,1997,(2):107~114.[15],.[J].,2004,(6):61~64.[16],FRP[J].,2000,(6):26~30.DurabilityandServiceLifePredictionofFRPBarsandFRPBarsReinforcedConcreteLIUZh-iyong,WUGu-iqin,MAL-iguo,ZHOUXin-gang(SchoolofCivilEngineering,YantaiUniversity,Yantai264005,China)Abstract:Fiberreinforcedpolymer(FRP)barsareanewtypeofmoderncompositematerialswithcharacteristicsofhightensilestrength,lightweight,strongresistancetocorros