钢筋腐蚀疲劳共同作用机理与寿命预测
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摘要
为了准确计算钢筋腐蚀疲劳寿命,依据金属力学、电化学、断裂力学的基本原理,对混凝土中脱钝钢筋的腐蚀介质和疲劳荷载共同作用交互机理进行研究,建立脱钝后钢筋在疲劳荷载作用下同时考虑弹性变形、塑性变形和电化学作用的钢筋腐蚀速率模型,在此基础上构建了圆柱形钢筋腐蚀疲劳应力强度因子幅值的计算模型。定量分析了腐蚀疲劳裂纹扩展门槛值的理论计算模型以及钢筋腐蚀疲劳裂纹扩展模型,提出了腐蚀介质和疲劳荷载共同作用下钢筋寿命预测模式。利用已有文献中钢棒腐蚀疲劳试验结果对本文提出的模型以及寿命预测模式进行验证,结果表明,p H=2.5~12时钢棒腐蚀疲劳寿命计算值与试验值吻合较好,还揭示了疲劳荷载对钢筋腐蚀速度影响规律。
Based on the basic principles of metal mechanics,electrochemistry,and fracture mechanics,studies of the interaction mechanism of corrosion medium and fatigue load of dispassivated reinforcement in the concrete structure have been carried out in order to accurately calculate the service life of the corroded reinforcement. A dispassivated reinforcement corrosion rate model considering the elastic deformation, plastic deformation and electrochemical action is established under the conditions of fatigue loads. On this basis,the calculation model for corrosion fatigue stress intensity factor amplitude of the cylindrical reinforcement is developed. The theoretical model for corrosion fatigue cracking propagation threshold and a reinforcement corrosion fatigue crack growth model are quantitatively analyzed. The reinforcement service life prediction model with corrosive medium and service loads is developed. The service life of the corroded reinforcement in the fatigue condition is calculated. Accoding to the steel bar corrosion fatigue test data in the references,the models and the method of the service life prediction are validated and the calculated results of steel bar corrosion fatigue life agree well with the test data when p H = 2. 5 ~12. The influence law of the fatigue loads on the steel corrosion rate is revealed through calculation and analysis of the service life.
Based on the basic principles of metal mechanics,electrochemistry,and fracture mechanics,studies of the interaction mechanism of corrosion medium and fatigue load of dispassivated reinforcement in the concrete structure have been carried out in order to accurately calculate the service life of the corroded reinforcement. A dispassivated reinforcement corrosion rate model considering the elastic deformation, plastic deformation and electrochemical action is established under the conditions of fatigue loads. On this basis,the calculation model for corrosion fatigue stress intensity factor amplitude of the cylindrical reinforcement is developed. The theoretical model for corrosion fatigue cracking propagation threshold and a reinforcement corrosion fatigue crack growth model are quantitatively analyzed. The reinforcement service life prediction model with corrosive medium and service loads is developed. The service life of the corroded reinforcement in the fatigue condition is calculated. Accoding to the steel bar corrosion fatigue test data in the references,the models and the method of the service life prediction are validated and the calculated results of steel bar corrosion fatigue life agree well with the test data when p H = 2. 5 ~12. The influence law of the fatigue loads on the steel corrosion rate is revealed through calculation and analysis of the service life.
引文
[1]WARDHANA K,HADIPRIONO F C.Analysis of recent bridges failure in the United States[J].Journal of Performance of Constructed Facilities,2003(8):144-150.
[2]龙跃,郑皆连,吴振.桥梁拉索典型病害事故的调查与研究[J].预应力技术,2010(6):28-31,38.(LONG Yue,ZHENG Jie-lian,WU Zhen.Investigation and research on the bridge CABLE typical diseases accidents[J].Prestress Technology,2010(6):28-31,38.(in Chinese))
[3]APOSTOLOPOULOS Ch Alk,MICHALOPOULOS D.Mechanical properties of reinforcing steel and fatigue behavior in corrosive environment[J].Journal of Materials Engineering and Performance,2007,16(5):559-566.
[4]李士彬,张伟平,顾祥林,等.加速锈蚀钢筋的疲劳试验研究[J].铁道学报,2010,32(5):93-97.(LI Shi-bin,ZHANG Wei-ping,GU Xiang-lin,et al.Experiment study on fatigue properties of corrosion-accelerated steel bars[J].Journal of the China Railway Society,2010,32(5):93-97.(in Chinese))
[5]李士彬,汤红卫,张鑫,等.自然锈蚀钢筋的疲劳试验[J].建筑材料学报,2014,17(5):811-815.(LI Shi-bin,TANG Hong-wei,ZHANG Xin,et al.Experimental study on fatigue of naturally corroded steel bars[J].Journal of Building Materials,2014,17(5):811-815.(in Chinese))
[6]古特曼.金属力学化学与腐蚀防护[M].金石,译.北京:科学出版社,1989.(ΓУТМАНЗМ.Metal mechanical chemical and corrosion[M].Translated by JIN Shi.Beijing:Science Press,1989.(in Chinese))
[7]曹楚南.腐蚀电化学原理[M].北京:化学工业出版社,2008.(CAO Chu-nan.Corrosion electrochemical principle[M].Beijing:Chemical Industry Press,2008.(in Chinese))
[8]王波,袁迎曙,陈瑞.氯盐侵蚀钢筋表面的坑蚀特征及蚀坑演变规律[J].中国矿业大学学报,2011,40(2):240-245.(WANG Bo,YUAN Yin-shu,CHEN Rui.The character and evolution of corrosion pits on steel reinforcing bar surfaces corroded by chloride[J].Journal of China University of Mining&Technology,2011,40(2):240-245.(in Chinese))
[9]RAJU I S,NEWMAN J C.Stress-intensity factor for circumferential surface cracks in pipes and rods under tension and bending loads[R].ASTM,STP905,1986:89-805.
[10]孙敏,肖葵,董超芳,等.300M超高强度钢电化学性能及应力腐蚀开裂[J].北京科技大学学报,2012,34(10):1159-1166.(SUN Min,XIAO Kui,DONG Chao-fang,et al.Electrochemical behavior and stress corrosion cracking of 300M ultrahigh strength stell[J].Journal of University of Science and Technology Beijing,2012,34(10):1159-1166.(in Chinese))
[11]MEDVED J J,BRETON M,IRVING P E.Corrosion pit size distributions and fatigue lives——a study of the EIFS technique for fatigue design in the presence of corrosion[J].International Journal of Fatigue,2004(26):71-80.
[12]RUIZ J,ELICES M.The role of environmental exposure in the fatigue behavior of Aluminum alloy[J].Corrosion Science,1997,39(12):2117-2141.
[13]凌超,郑修麟.一种估算疲劳裂纹扩展门槛值Kth的新方法[J].机械强度,1989,11(4):42-45.(LING Chao,ZHENG Xiu-lin.A new method for prediction fatigue crack propagation threshold[J].Mechanical Strength,1989,11(4):42-45.(in Chinese))
[14]第52研究所.常用金属材料断裂韧性的测试[M].北京:兵器工业出版社,1996.(The 52th Institute.Metal material fracture toughness test[M].Beijing:The Publishing House of Ordnance Industry,1996.(in Chinese))
[15]袁劲松.金属腐蚀疲劳裂纹扩展速率的近似计算[J].材料开发与应用,2000,15(2):26-29.(YUAN Jin-song.Approximate calculation of crack propagation rate of metal corrosion fatigue[J].Development and Application of Material,2000,15(2):26-29.(in Chinese))
[16]臧启山,刘慷,马敏雅,等.频率、p H值和温度对A537海洋用钢腐蚀疲劳性能的影响[J].腐蚀科学与防护技术,1989,1(2):10-14.(ZANG Qi-shan,LIU Kang,MA Min-ya,et al.Frequency,p H and temperature on the A537 marine corrosion fatigue properties of steel[J].Corrosion Science and Protection Technology,1989,1(2):10-14.(in Chinese))
[17]机械工程材料性能数据手册编委会.机械工程材料性能数据手册[M].北京:机械工业出版社,1994.(The Editorial Board of Mechanical Engineering Material Properties Data Manual.Mechanical engineering material properties data manual[M].Beijing:China Machines Press,1994.(in Chinese))
[18]李富民,袁迎曙,耿欧,等.混凝土中钢筋腐蚀速率的理论模型[J].华南理工大学学报(自然科学版),2009(8):83-88.(LI Fu-min,YUAN Ying-shu,GENG Ou,et al.The oretical models of corrosion rate of steel bars embedded in concrete[J].Journal of South China University of Technology(Natural Science Edition),2009(8):83-88.(in Chinese))
[19]王兆节.BE-133型悬臂梁腐蚀疲劳试验机的改装[J].物理测试,1986(4):54-55.(WANG Zhao-jie.The modification of BE-133 cantilever beam of corrosion fatigue testing machine[J].Physics Examination and Testing,1986(4):54-55.(in Chinese))
[20]赵永韬,郭兴蓬.混合控制下腐蚀过程的电化学动力学参数测定[J].物理化学学报,2006,22(10):1281-1286.(ZHAO Yong-tao,GUO Xing-peng.Determination of electrochemical kinetic parameters in a mixture controlled corrosion system[J].Acta Physico-Chimica Sinica,2006,22(10):1281-1286.(in Chinese))
[2]龙跃,郑皆连,吴振.桥梁拉索典型病害事故的调查与研究[J].预应力技术,2010(6):28-31,38.(LONG Yue,ZHENG Jie-lian,WU Zhen.Investigation and research on the bridge CABLE typical diseases accidents[J].Prestress Technology,2010(6):28-31,38.(in Chinese))
[3]APOSTOLOPOULOS Ch Alk,MICHALOPOULOS D.Mechanical properties of reinforcing steel and fatigue behavior in corrosive environment[J].Journal of Materials Engineering and Performance,2007,16(5):559-566.
[4]李士彬,张伟平,顾祥林,等.加速锈蚀钢筋的疲劳试验研究[J].铁道学报,2010,32(5):93-97.(LI Shi-bin,ZHANG Wei-ping,GU Xiang-lin,et al.Experiment study on fatigue properties of corrosion-accelerated steel bars[J].Journal of the China Railway Society,2010,32(5):93-97.(in Chinese))
[5]李士彬,汤红卫,张鑫,等.自然锈蚀钢筋的疲劳试验[J].建筑材料学报,2014,17(5):811-815.(LI Shi-bin,TANG Hong-wei,ZHANG Xin,et al.Experimental study on fatigue of naturally corroded steel bars[J].Journal of Building Materials,2014,17(5):811-815.(in Chinese))
[6]古特曼.金属力学化学与腐蚀防护[M].金石,译.北京:科学出版社,1989.(ΓУТМАНЗМ.Metal mechanical chemical and corrosion[M].Translated by JIN Shi.Beijing:Science Press,1989.(in Chinese))
[7]曹楚南.腐蚀电化学原理[M].北京:化学工业出版社,2008.(CAO Chu-nan.Corrosion electrochemical principle[M].Beijing:Chemical Industry Press,2008.(in Chinese))
[8]王波,袁迎曙,陈瑞.氯盐侵蚀钢筋表面的坑蚀特征及蚀坑演变规律[J].中国矿业大学学报,2011,40(2):240-245.(WANG Bo,YUAN Yin-shu,CHEN Rui.The character and evolution of corrosion pits on steel reinforcing bar surfaces corroded by chloride[J].Journal of China University of Mining&Technology,2011,40(2):240-245.(in Chinese))
[9]RAJU I S,NEWMAN J C.Stress-intensity factor for circumferential surface cracks in pipes and rods under tension and bending loads[R].ASTM,STP905,1986:89-805.
[10]孙敏,肖葵,董超芳,等.300M超高强度钢电化学性能及应力腐蚀开裂[J].北京科技大学学报,2012,34(10):1159-1166.(SUN Min,XIAO Kui,DONG Chao-fang,et al.Electrochemical behavior and stress corrosion cracking of 300M ultrahigh strength stell[J].Journal of University of Science and Technology Beijing,2012,34(10):1159-1166.(in Chinese))
[11]MEDVED J J,BRETON M,IRVING P E.Corrosion pit size distributions and fatigue lives——a study of the EIFS technique for fatigue design in the presence of corrosion[J].International Journal of Fatigue,2004(26):71-80.
[12]RUIZ J,ELICES M.The role of environmental exposure in the fatigue behavior of Aluminum alloy[J].Corrosion Science,1997,39(12):2117-2141.
[13]凌超,郑修麟.一种估算疲劳裂纹扩展门槛值Kth的新方法[J].机械强度,1989,11(4):42-45.(LING Chao,ZHENG Xiu-lin.A new method for prediction fatigue crack propagation threshold[J].Mechanical Strength,1989,11(4):42-45.(in Chinese))
[14]第52研究所.常用金属材料断裂韧性的测试[M].北京:兵器工业出版社,1996.(The 52th Institute.Metal material fracture toughness test[M].Beijing:The Publishing House of Ordnance Industry,1996.(in Chinese))
[15]袁劲松.金属腐蚀疲劳裂纹扩展速率的近似计算[J].材料开发与应用,2000,15(2):26-29.(YUAN Jin-song.Approximate calculation of crack propagation rate of metal corrosion fatigue[J].Development and Application of Material,2000,15(2):26-29.(in Chinese))
[16]臧启山,刘慷,马敏雅,等.频率、p H值和温度对A537海洋用钢腐蚀疲劳性能的影响[J].腐蚀科学与防护技术,1989,1(2):10-14.(ZANG Qi-shan,LIU Kang,MA Min-ya,et al.Frequency,p H and temperature on the A537 marine corrosion fatigue properties of steel[J].Corrosion Science and Protection Technology,1989,1(2):10-14.(in Chinese))
[17]机械工程材料性能数据手册编委会.机械工程材料性能数据手册[M].北京:机械工业出版社,1994.(The Editorial Board of Mechanical Engineering Material Properties Data Manual.Mechanical engineering material properties data manual[M].Beijing:China Machines Press,1994.(in Chinese))
[18]李富民,袁迎曙,耿欧,等.混凝土中钢筋腐蚀速率的理论模型[J].华南理工大学学报(自然科学版),2009(8):83-88.(LI Fu-min,YUAN Ying-shu,GENG Ou,et al.The oretical models of corrosion rate of steel bars embedded in concrete[J].Journal of South China University of Technology(Natural Science Edition),2009(8):83-88.(in Chinese))
[19]王兆节.BE-133型悬臂梁腐蚀疲劳试验机的改装[J].物理测试,1986(4):54-55.(WANG Zhao-jie.The modification of BE-133 cantilever beam of corrosion fatigue testing machine[J].Physics Examination and Testing,1986(4):54-55.(in Chinese))
[20]赵永韬,郭兴蓬.混合控制下腐蚀过程的电化学动力学参数测定[J].物理化学学报,2006,22(10):1281-1286.(ZHAO Yong-tao,GUO Xing-peng.Determination of electrochemical kinetic parameters in a mixture controlled corrosion system[J].Acta Physico-Chimica Sinica,2006,22(10):1281-1286.(in Chinese))