A model for corrosion-induced cracking of reinforced concrete subjected to non-uniform chloride-induced corrosion is presented. The gradual corrosion initiation of the steel surface is investigated by simulating chloride transport considering binding. The transport of iron from the steel surface, its subsequent precipitation into rust, and the associated precipitation-induced pressure are explicitly modelled. Model results, obtained through finite element simulations, agree very well with experimental data, showing significantly improved accuracy over uniform corrosion modelling. The results obtained from case studies reveal that crack-facilitated transport of chlorides cannot be neglected, that the size of the anodic region must be considered, and that precipitate accumulation in pores can take years.

翻译：本文提出了一个用于模拟非均匀氯离子诱导腐蚀下钢筋混凝土腐蚀致裂的模型。通过考虑结合作用的氯离子传输模拟，研究了钢筋表面的渐进腐蚀起始过程。显式建模了铁从钢筋表面的迁移、随后沉淀生成锈蚀产物及其相关的沉淀诱发压力。通过有限元模拟获得的模型结果与实验数据吻合良好，其精度显著优于均匀腐蚀模型。案例研究表明：裂纹加速氯离子传输的作用不可忽略，阳极区尺寸必须纳入考虑，且孔隙中沉淀物的累积可能持续数年。