锈蚀率与极限粘结强度关系的试验研究

3,:196912:1999-07-213(710082)(710055):,5,:EXPERIMENTALSTUDYONRELATIONBETWEENCORROSIONRATEANDULTIMATEBONDSTRENGTHPanZhenhua(ShaanxiInst.ofArch.Res.andDes.Xian710082)NiuDitaoWangQinglin(XianUniv.ofArch.andTech.Xian710055)Abstract:Basedontheresultofreinforcedconcreteacceleratedcorrosionexperiment,theconstitutiverelationbetweencorrosionrateandultimatebondstrengthwasgiven.Itmainlyconcernedthesefivefactors:concretecoverthickness,concretestrength,reinforcementdiameter,reinforcementtypeandthepositionofreinforcement.Ascientificbasisisprovidedforallcourseanalysisofthebearingcapacityofacorrodedreinforcedconcretemember.Keywords:acceleratedcorrosionexperimentultimatebondstrengthreinforcedconcrete,,,,,,1111150mm150mm300mm,425520mm,111845123400mm,30mm3,28d,1[1],5%NaCl,6V,112[2],01IndustrialConstruction2000,Vol130,No15200030511-;2-;3-();4-5%NaCl,,221x(/kN)afcuk=20105MPa,c=20mm,,,d/mm1216200.0296(34)0.0460(20)0.0350(58)0.0164(38)0.0256(45)0.0350(58)0.0134(46)0.0184(57)0.0173(62)0.0062(49)0.0107(70)0.0066(72)79.194.599.8fcuk=20105MPa,d=12mm,,,c/mm102030400.0327(9)0.0296(34)0.0577(21)0.0733(23)0.0290(13)0.0164(38)0.0507(34)0.0639(26)0.0243(18)0.0134(46)0.0405(36)0.0552(30)0.0103(36)0.0062(49)0.0339(40)0.0429(44)105.279.170.661.1fcuk=20105MPa,d=12mm,,,fcuk/MPa()20.5(0.55)13.4(0.45)23.37(0.65)9.95(0.75)0.0296(34)0.0406(18)0.0561(16)0.0426(12)0.0164(39)0.0365(30)0.0527(36)0.0441(22)0.0134(46)0.0245(33)0.0276(39)0.0359(26)0.0062(49)0.0102(46)0.0074(53)0.0093(42)79.180.974.481.4fcuk=20105MPa,c=20mm,d=12mm,-0.0296(34)0.0447(13)0.0164(38)0.0372(27)0.0134(46)0.0272(29)0.0062(49)0.0172(46)79.1106.2fcuk=20105MPa,c=20mm,d=12mm0.0296(34)0.0488(43)0.0164(38)0.0309(50)0.0134(46)0.0236(55)0.0062(49)0.0113(61)79.142.521,amaxxmax(x)=max(0)-a(x-t)max1,,,a511:,a;,a;,a3,,a;a3,cdfcukaa,a5[3],:a=ea0ca1da2fcuka3(1),cdfcukmmmmMPa:a0=4.607,a1=-0.381,a2=0.413,a3=-0.0346,=0105,:a=1001183c-0.381d0.413fcuk-0.0346(2),K1,K2,K1=110,K1=11343;K2=1,K2=01537,:a=K1K21001183c-0.381d0.413f-0.0346cuk(3)(016%),[4],t=01006,:max(x)=max(0)(0x016%)max(0)-a(x-01006)(016%x1)(4)max(x)x,MPa4(1),,;(2)3(a)--;(b)--;(c)--(9)212000305,,HIIJ:,,(FI)423,4FG3FH,,,,FG24,,AB,,41-;2-,,,,,3,,,,,,,,1LiuT,WeyersRW.ModelingtheDynamicCorrosionPro2cessinChlorideContaminatedConcreteStructures.CementandConcreteResearch,1998,28(3):3653792BamforthPB.SpreadsheetModelforReinforcementCorro2sioninStructuresExposedtoChlorides,ConcreteunderSeverConditions2,EnvironmentandLoading.London:E&FNSPON,1998.64753BenturA,SiamondSandBerkeNS.SteelCorrosioninConcrete.London:E&FNSPON,1997.414FeliuS,GonzalezJA,FeliuS,AndradeC.RelationshipBe2tweenConductivityofConcreteandCorrosionofReinforc2ingBars.BritishCorrosionJournal,1989,24(3):195198(12)1YoshihirgTachibana,KenIchimaeda,YasuoKajikawa,etal.MechanicalBehaviorofRCBeamsDamagedbyCorro2sionofReinforcement.CorrosionofReinforcementinCon2crete.London:SocietyofChemical,19902ParkR,PaulayT.ReinforcedConcreteStructures.JohnWileyandSons,19753,,..:,19884CabreraJG,GhoddoussiP.TheEffectofReinforcementCorrosionontheStrengthoftheSteelConcreteBond.In:ProceedingofInternationalConferenceBondinConcreteLstion,1992,:80:33,1000889