不同加速锈蚀方法下钢筋砼结构性能试验研究-吴庆

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25 3()Vol.25 No.320059JournalofAnhuiUniversityofScienceandTechnology(NaturalScience)Sep.2005不同加速锈蚀方法下钢筋砼结构性能试验研究吴庆1,章鑫森2,袁迎曙2(1.,  232001;2.,  221008) :通过采用人工气候和通电快速锈蚀模拟方法,对锈蚀钢筋混凝土梁进行试验,以对比研究结构性能退化机理,结果发现锈蚀后钢筋混凝土梁的强度、延性和破坏形态发生了急剧变化,而且人工气候环境下的混凝土内钢筋锈蚀比通电条件能更好的贴近实际情况。:;;;;:TU317  :A  :1672-1098(2005)03-0021-05:2004-11-30:(50078054);(2004jq145);:(1972-),,,,,。ExperimentResearchonDifferentStructuralBehaviorofReinforcedConcreteBeamsUsingDifferentAcceleratedCorrosionMethodsWUQing1,2,ZHANGXin-sen2,YUANYing-shu2(1.Dept.ofCivilEngineering,AnhuiUniversityofScienceandTechnology,HuainanAnhui232001,China;2.SchoolofEngineeringandArchitecture,ChinaUniversityofMiningandTechnology,XuzhouJiangsu221008,China)Abstract:Inthispaper,bytheacceleratedcorrosionmethodsofman-madeclimateandgalvanostatictocorrodethebars,experimentswerecarriedouttostudythedifferentstructurebehaviorofcorrodedreinforcedconcretebeams,anditwaslearnedthattheconditionofman-madeclimatewasclosertopracticethangalvanostaticmethod.Keywords:man-madeclimate;galvanostaticmethod;reinforcedconcretebeams;acceleratedcorrosion;structurebehavior,,,。,1975700,40%。,500,,5.5(1.1%),。,,,[1]。,,。,,,,,,。,。21,,、。,。,。,,,,[2]。,,(P)-(f),,、,,。1 1.1 b×h×l=100mm×160mm×1500mm,Ф12,C25,PO32.5,16mm,70mm,∶∶∶=1∶1.75∶2.98∶0.55,15mm,1、2。1 ()2 ()1.2 ,5%(NaCl)。28d,,T=40℃,RH=90%,,。,,2d,1d,“”,“”5%,。,5%NaCl,,,NaCl,。,。,[3]。,,,,22      ()            25,。1.3 1,LK1、LR1、LR2、LR3、LD1、LD2LD3。LK1,LR1、LR2、LR3,0.2mm、0.5mm0.8mm,LD1、LD2LD3,0.2mm、0.5mm0.8mm(1)。1 (mm)(%)(mA)(h)LK1300----LR130.21.1----LR230.51.6----LR330.82.4----LD130.21.4567.528.8LD230.53.0567.561.2LD330.84.4567.584.3:(1)K,R,D;(2),,1mA/cm2。  ,、3,,。,,(),。1.4 (P)-(f),。,(3)。3 2 2.1 24。,,40.2mm、0.5mm0.8mm。2.2 (1)4a,0.2mm,LR1LD1,LK1,LR1,LD1。,,,,,。233            ,:2 (mm)(%)Py(kN)Pu(kN)fy(mm)fu(mm)fu/fyLK10046.3[1.00]49.3[1.00]4.51121.3144.725[1.00]LR10.21.147.8[1.03]50.4[1.02]5.25417.6923.367[0.71]LR20.51.646.0[0.99]48.9[0.99]5.19810.4402.008[0.42]LR30.82.445.6[0.98]46.3[0.94]8.12713.4121.650[0.35]LD10.21.447.0[1.02]49.8[1.01]5.1339.8371.916[0.41]LD20.53.045.5[0.98]46.2[0.94]6.3398.6221.360[0.29]LD30.84.444.1[0.95]44.4[0.90]5.1216.1351.198[0.25]    :fu;fy;[]。 f/mm (a)0.2mm(LK1,LR1LD1) f/mm (b)0.5mm(LK1,LR2LD2) f/mm (c)0.8mm(LK1,LR3LD3) 1.;2.;3.4 P-f(2)4b,0.5mm,LR2,LD2,LK1,,,。(3)4c,LR3,LD3,LK1。(4)4,,。24      ()            25,,,;,,,,。,。(5)4,,,(P)-(f),L-K1,。(P)-(f),,。,,,,,。3 (1),,,;,,,,。(2),。,。(3)0.8mm,。,,,,,,,。,。:[1] .[D].:,1999.[2] ,,.[J].,2001,34(3):47-52.[3] ,.[J].,2001,31(5):9-11.253            ,:

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