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。
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 27years to 31years.The thickness of protective layer on surface of wind turbine foundation in Tongliao area was 42mm,and it took 27years for the crack width to reach the allowable maximum value.Taking into account the climate in the four seasons,it took 34years.For every 3 mm increased in the thickness of protective layer,the cracking time was delayed by about 1.2years.
作者
赵振宁
许云龙
周长俊
何艳伟
肖建国
吴佳润
ZHAO Zhenning;XU Yunlong;ZHOU Changjun;HE Yanwei;XIAO Jianguo;WU Jiarun(East Inner Mongolia Xiehe New Energy Co.,Ltd.,Tongliao 028011,China;Dalian University of Technology,Dalian 116023,China)
出处
《腐蚀与防护》
CAS
CSCD
北大核心
2023年第12期79-85,90,共8页
Corrosion & Protection
基金
国家电投集团科技项目(2021-359-MDN-KJ-X)。
关键词
风电基础
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
