内蒙古风电基础钢筋混凝土在氯盐环境中的寿命预测
Life Prediction of Reinforced Concrete of Wind Power Foundation in Inner Mongolia Chloride Environment
摘 要
针对内蒙古通辽地区的氯盐环境，基于修正菲克第二定律和电化学腐蚀规律，开展混凝土内部氯盐输运及钢筋锈蚀模拟，利用多物理场耦合软件Comsol Muhiphysic建立风电机组基础钢筋锈蚀开裂模型，对该地区风电机组钢筋混凝土的寿命进行预测。结果表明：当混凝土表面的氯盐含量由1.8%下降到1.2%时，保护层开裂时间由27 a推迟到31 a；通辽地区风电机组基础表面的保护层厚度为42 mm，其裂缝宽度达到允许的最大值需要27 a，考虑到四季气候影响，实际需要34 a；保护层厚度每增加3 mm，开裂时间推迟约1.2 a。
钢筋混凝土
氯盐环境
钢筋锈蚀
开裂
wind power foundation
reinforced concrete
chloride environment
steel bar corrosion
cracking
Abstract
According to the chloride environment in Tongliao, Inner Mongolia, based on the modified Fick's second rules and electrochemical corrosion rules, the simulation of chloride transport and steel corrosion in concrete was carried out. The multi-physics coupling software Comsol Muhiphysic was used to establish the corrosion and cracking model of the wind turbine foundation steel bar, and to predict the structural life of reinforced concrete of wind turbine in this area. The results showed that when the chloride concentration on the concrete surface decreased from 1.8% to 1.2%, and the cracking time of protective layer was delayed from 27 years to 31 years. The thickness of protective layer on surface of wind turbine foundation in Tongliao area was 42 mm, and it took 27 years for the crack width to reach the allowable maximum value. Taking into account the climate in the four seasons,it took 34 years. For every 3 mm increased in the thickness of protective layer, the cracking time was delayed by about 1.2 years.
中图分类号 TG174 DOI 10.11973/fsyfh-202312012
所属栏目 应用技术
基金项目 国家电投集团科技项目（2021-359-MDN-KJ-X）
收稿日期 2021/11/17
修改稿日期
网络出版日期
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引用该论文: ZHAO Zhenning,XU Yunlong,ZHOU Changjun,HE Yanwei,XIAO Jianguo,WU Jiarun. Life Prediction of Reinforced Concrete of Wind Power Foundation in Inner Mongolia Chloride Environment[J]. Corrosion & Protection, 2023, 44(12): 79
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参考文献
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【3】袁迎曙, 贾福萍, 蔡跃. 锈蚀钢筋混凝土梁的结构性能退化模型[J]. 土木工程学报, 2001, 34(3):47-52, 96.
【4】王民浩, 陈观福. 我国风力发电机组地基基础设计[J]. 水力发电, 2008, 34(11):88-91.
【5】赛佳美, 卢玉东, 王正川, 等. 内蒙古腰坝绿洲的土壤盐渍化特征[J]. 水土保持通报, 2017, 37(5):152-156.
【6】程红霞. 通辽市土壤资源与利用现状浅析[J]. 内蒙古农业科技, 2008, 36(5):86, 105.
【7】BERKE N S, HICKS M C. Predicting chloride profiles in concrete[J]. Corrosion, 1994, 50(3):234-239.
【8】MARTÍN-PÉREZ B, PANTAZOPOULOU S J, THOMAS M D A. Numerical solution of mass transport equations in concrete structures[J]. Computers & Structures, 2001, 79(13):1251-1264.
【9】HOSEINI M, BINDIGANAVILE V, BANTHIA N. The effect of mechanical stress on permeability of concrete:a review[J]. Cement and Concrete Composites, 2009, 31(4):213-220.
【10】余红发. 盐湖地区高性能混凝土的耐久性、机理与使用寿命预测方法[D]. 南京:东南大学, 2004.
【11】乔宏霞, 乔国斌, 路承功. 混凝土中氯离子传输模拟及速率分析[J]. 华中科技大学学报(自然科学版), 2022, 50(2):19-25.
【12】LUPING T, NILSSON L O. Rapid determination of the chloride diffusivity in concrete by applying an electric field[J]. ACI Materials Journal, 1993, 89(1):49-53.
【13】金伟良, 赵羽习. 混凝土结构耐久性[M]. 2版.北京:科学出版社, 2014.
【14】张誉. 混凝土结构耐久性概论[M]. 上海:上海科学技术出版社, 2003.
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【16】HUSSAIN R R, ISHIDA T. Enhanced electro-chemical corrosion model for reinforced concrete under severe coupled action of chloride and temperature[J]. Construction and Building Materials, 2011, 25(3):1305-1315.
【17】KRANC S C, SAGVÉS A A. Detailed modeling of corrosion macrocells on steel reinforcing in concrete[J]. Corrosion Science, 2001, 43(7):1355-1372.
【18】GE J, ISGOR O B. Effects of Tafel slope, exchange current density and electrode potential on the corrosion of steel in concrete[J]. Materials and Corrosion, 2007, 58(8):573-582.
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【23】SUDA K, MISRA S, MOTOHASHI K. Corrosion products of reinforcing bars embedded in concrete[J]. Corrosion Science, 1993, 35(5/6/7/8):1543-1549.
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