箍筋锈蚀混凝土棱柱体试件轴心受压试验研究

43120131BuildingStructureVol．43No．1Jan．2013*710055。、。TU375.3A1002-848X201301-0065-04ExperimentalstudyonreinforcedconcreteprismspecimensconfinedbycorrodedstirrupsLiQiangNiuDitaoLiuLeiWangQinglinSchoolofCivilEngineeringXi'anUniversityofArchitecture＆TechnologyXi'an710055ChinaAbstractThecorrodedreinforcedconcreteprismspecimensconfinedbythesquarestirrupswhichweresubjectedtoacceleratedcorrosionwereobtained．Theaxialcompressivetestofthecorrodedreinforcedconcreteprismspecimensandcontrasteduncorrodedreinforcedconcreteprismspecimenswascarriedfurther．Theeffectofcorrosionofstirrupsonthedeteriorationformofreinforcedconcreteprismspecimensandtheconcretedamagewereanalyzed．Theresultsofaxialcompressivetestshowthatthecornersofstirrupsarecorrodedveryseriouslyandthecracksoftheprotectivelayeraredevelopedalongtheverticaldirectionatthecornerofthereinforcedconcreteprismspecimenscrackswidthesincreasewiththeincreaseofcorrosiondegree．The“pilingup”ofcorrosionproductsbetweentheconcretecoverandthecoreconcretezonereducesitscontributiontothecapacityofreinforcedconcreteprismspecimens．Thecorrosionrateofstirrupshasinfluenceddirectlyonthedevelopmentspeedofcracksandthedamagemode．Thegrowthofcracksspeedsupthedamageofthecoreconcreteismoreseriousthedestroyinclinesectionismoreobviousandthedeteriorationformofthesamplesshiftfromductilefailuretothebrittlefailureastheamountofstirrupscorrosiongrows．Keywordsstirrupscorrosionconfinedconcreteaxialcompressionconcretedamage*50725824“13115”2010ZDKG-55。[e-mail]。0。1210%-3。。。。。4～8。2013。123。11.11553123。10%20%30%40%CA-1CA-2CA-3CA-4CA-0。-4mm5。1。C25P．O32.515mm。1/mm/MPa/MPa/%Ⅰ641060522II1245068029。、。28d270d。2。1。2/kg/m3/kg/m3/kg/m3/kg/m3/kg/m328d/MPa270d/MPa38518569011703.8533.551.831.22。20～30V0～2A。120.045～3mA/cm2。0.05～0.1mA/cm29。100.1～0.5mA/cm25%110.6mA/cm20.6mA/cm2。0.2～0.5mA/cm2。3。3/mA/cm2/d/CA-10.53030.230CA-20.53030.240CA-30.53030.2500.530CA-40.25030.41066431．1.3NaCl60mm60mm。1.4NaCl。CA-1CA-2CA-3CA-470d、CA-44.0mm。3。322.1YAW-5000F4。0.3mm/min。0.5s。2.24。、、、80%。、。CA-114.0%。、、、、。CA-2CA-3CA-420.79%25.09%33.25%60%、。、76201356。5。、。。。。2.31.1～1.82.5～412。。、“”6。31。2、808620132HL-3HL-4。HL-31.05%HL-40.7%。。3HL-3HL-5。。。。HL-325mmHL-535mm。31。。HRBF500。2。2。。3。。。1．400MPaJ．2004281035-40．2GB1499.2—20072S．20081-14．3．500MPa-J．2008113276-282．4．HRBF500J．200939115-8．5．HRBF500J．2009391113-1644．6．HRBF500J．200939352-55。7．HRBF500J．201233250-55．8．J．2012423116-11832．9GB/T9978—2008S．2008．68。3“”。1．J．20013461-4．2．J．199727610-1333．3．-J．2006345106-242．4．D．2000．5．D．2001．6．D．2003．7RODRIGUEZJORTEGALMCASALJ．LoadbearingcapacityofconcretecolumnswithcorrodedreinforcementC//CorrosionofReinforcementinConcreteConstruction．LondonOveArupandPartners1996220-230．8．J．1999313218-221．9．J．20053056-9．10TAMERAKHALEDA．EffectivenessofimpressedcurrenttechniquetosimulatecorrosionofsteelreinforcementinconcreteJ．JournalofMaterialsinCivilEngineering200315141-47．11CHRISTOPHERHIGGINSWILLIAMCFARROWIII．TestsofreinforcedconcretebeamswithcorrosiondamagedstirrupsJ．ACIStructuralJournal20061031133-141．12．J．2009414508-511．08