基于可靠度的耐蚀低合金钢筋腐蚀起始寿命预测
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  • 英文篇名:Corrosion Initiation Life of Corrosion Resistant Low Alloy Steel Rebars Based on Reliability Analysis
  • 作者:刘明 ; 程学群 ; 李晓刚 ; 卢天健
  • 英文作者:LIU Ming;CHENG Xuequn;LI Xiaogang;LU Tianjian;MOE Key Laboratory for Multifunctional Materials and Structures,School of Aerospace Engineering,Xi′an Jiaotong University;State Key Laboratory for Strength and Vibration of Mechanical Structure,School of Aerospace Engineering,Xi′an Jiaotong University;Corrosion and Protection Center,Institute for Advanced Materials and Technology,University of Science and Technology Beijing;Ningbo Institute of Material Technology & Engineering,Chinese Academy of Sciences;State Key Laboratory of Mechanics and Control of Mechanical Stractures,Nanjing University of Aeronautics and Astronautics;
  • 关键词:耐蚀钢筋 ; 寿命预测 ; 温度 ; 钢筋混凝土结构 ; 概率分析
  • 英文关键词:corrosion resistant steel rebar;;life prediction;;temperature;;steel rebar reinforced concrete structure;;probabilistic analysis
  • 中文刊名:FSYF
  • 英文刊名:Corrosion & Protection
  • 机构:西安交通大学航天航空学院多功能材料与结构教育部重点实验室;西安交通大学航天航空学院机械结构强度与振动国家重点实验室;北京科技大学新材料技术研究院腐蚀与防护中心;中国科学院宁波材料技术与工程研究所;南京航空航天大学机械结构力学与控制国家重点实验室;
  • 出版日期:2019-04-15
  • 出版单位:腐蚀与防护
  • 年:2019
  • 期:v.40;No.354
  • 基金:中国博士后科学基金(2017M620448);; 国家自然科学基金(51801149)
  • 语种:中文;
  • 页:FSYF201904010
  • 页数:6
  • CN:04
  • ISSN:31-1456/TQ
  • 分类号:51-56
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。
        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.
引文
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