基于可靠度的耐蚀低合金钢筋腐蚀起始寿命预测
Corrosion Initiation Life of Corrosion Resistant Low Alloy Steel Rebars Based on Reliability Analysis
摘 要
通过Monte Carlo概率分析的方法，结合文献查阅，对3种自行研制且含不同铬含量的低合金耐蚀钢筋在海洋环境中的腐蚀起始寿命进行了预测，重点研究了温度对钢筋腐蚀起始寿命的影响规律。结果表明：温度的升高不仅降低了钢筋腐蚀的临界氯离子含量，也提高了混凝土中氯离子的扩散系数；采用低合金耐蚀钢筋可不同程度地延长混凝土中钢筋腐蚀起始寿命，提高钢筋混凝土结构在海洋环境中的耐久性，但针对极其苛刻的服役环境应采用更为严格的防腐蚀措施。
寿命预测
温度
钢筋混凝土结构
概率分析
corrosion resistant steel rebar
life prediction
temperature
steel rebar reinforced concrete structure
probabilistic analysis
Abstract
The method of Monte Carlo probability analysis together with literature survey were used to predict the corrosion initial life of 3 kinds of corrosion resistant low alloy steel rebars with different Cr content in marine environment.The influence of temperature on the corrosion initiation life was studied as a key point.The results show that the increase of temperature not only reduced the critical chloride concentration but also increased the diffusion coefficient of chloride in concrete.Using corrosion resistant low alloy steel rebars can prolong the corrosion initial life,improve the durability of steel rebar reinforced concrete structures in marine environment.But more strict anti-corrosion measures should be taken for rebars in extremely harsh service environment.
中图分类号 TG174 DOI 10.11973/fsyfh-201904009
所属栏目 数值模拟
基金项目 中国博士后科学基金（2017M620448）；国家自然科学基金（51801149）
收稿日期 2017/10/9
修改稿日期
网络出版日期
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引用该论文: LIU Ming,CHENG Xuequn,LI Xiaogang,LU Tianjian. Corrosion Initiation Life of Corrosion Resistant Low Alloy Steel Rebars Based on Reliability Analysis[J]. Corrosion & Protection, 2019, 40(4): 281
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参考文献
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【2】GAMEIRO F,DE BRITO J,CORREIA DA SILVA D. Durability performance of structural concrete containing fine aggregates from waste generated by marble quarrying industry[J]. Engineering Structures,2014,59:654-662.
【3】WEN X D,TU J L,GAN W Z. Durability protection of the functionally graded structure concrete in the splash zone[J]. Construction and Building Materials,2013,41:246-251.
【4】KANELLOPOULOS A,PETROU M F,IOANNOU I. Durability performance of self-compacting concrete[J]. Construction and Building Materials,2012,37:320-325.
【5】EL-HAWARY M M,ABDUL-JALEEL A. Durability assessment of epoxy modified concrete[J]. Construction and Building Materials,2010,24(8):1523-1528.
【6】葛燕,朱锡昶,李岩. 桥梁钢筋混凝土结构防腐蚀:耐腐蚀钢筋及阴极保护[M]. 北京:化学工业出版社,2011.
【7】CRIADO M,BASTIDAS D M,FAJARDO S,et al. Corrosion behaviour of a new low-nickel stainless steel embedded in activated fly ash mortars[J]. Cement and Concrete Composites,2011,33(6):644-652.
【8】ABDULRAHMAN A,RAJA R H,RAJEH A Z,et al. Corrosion of reinforcement in concrete construction[J]. Construction and Building Materials,2012,38(9):67-81.
【9】INGHAM B,KO M,KEAR G,et al. In situ synchrotron X-ray diffraction study of surface scale formation during CO2 corrosion of carbon steel at temperatures up to 90℃[J]. Corrosion Science,2010,52(9):3052-3061.
【10】LIU M,CHENG X Q,LI X G,et al. Corrosion behavior of Cr modified HRB400 steel rebar in simulated concrete pore solution[J]. Construction and Building Materials,2015,93:884-890.
【11】LIU M,CHENG X Q,LI X G,et al. Corrosion behavior and durability of low-alloy steel rebars in Marine environment[J]. Journal of Materials Engineering and Performance,2016,25(11):4967-4979.
【12】LIU M,CHENG X Q,LI X G,et al. Indoor accelerated corrosion test and Marine field test of corrosion-resistant low-alloy steel rebars[J]. Case Studies in Construction Materials,2016,5:87-99.
【13】马亚丽. 基于可靠性分析的钢筋混凝土结构耐久寿命预测[D]. 北京:北京工业大学,2006.
【14】史波,赵国藩. 基于可靠度的锈蚀钢筋混凝土结构使用寿命预测[J]. 大连理工大学学报,2007,47(1):61-67.
【15】YAMAJI T,HAMADA H,MIZUMA S,et al. Study on the corrosion resistant property of stainless steel bars under Marine environment[J]. Doboku Gakkai Ronbunshuu E,2010,66(2):207-220.
【16】CHEN D,MAHADEVAN S. Chloride-induced reinforcement corrosion and concrete cracking simulation[J]. Cement and Concrete Composites,2008,30(3):227-238.
【17】SNYDER K A. Validation and modification of the 4SIGHT computer program[R]. Gaithersburg,MD:National Institute of Standards and Technology,2001.
【18】BERKE N S,HICKS M C. Predicting long-term durability of steel reinforced concrete with calcium nitrite corrosion inhibitor[J]. Cement and Concrete Composites,2004,26(3):191-198.
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