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Meso-Scale Fracture Modelling Of Concrete Cover Induced By Non-Uniform Corrosion Of Reinforcing Bar, Xun Xi, Shangtong Yang, Chun-Qing Li
Meso-Scale Fracture Modelling Of Concrete Cover Induced By Non-Uniform Corrosion Of Reinforcing Bar, Xun Xi, Shangtong Yang, Chun-Qing Li
International Conference on Durability of Concrete Structures
Corrosion-induced concrete cracking is a significant durability problem for reinforced concrete structures. In practice, critical corrosion degree to surface cracking and crack width evolution are of significance in regards to the assessment of serviceability of reinforced concrete structures. Literature review suggests that, although considerable research has been undertaken on corrosion-induced concrete cracking, little has been focused on non-uniform corrosion of reinforcing bar, especially by considering concrete as a three-phase materials. In this paper, a meso-scale fracture model, consisting of aggregates, cement paste/mortar and ITZ, is established. To simulate arbitrary cracking in concrete, cohesive elements are inserted in the fine meshes …
A New Model For Corrosion-Induced Concrete Cracking, Xun Xi, Shangtong Yang, Chun-Qing Li
A New Model For Corrosion-Induced Concrete Cracking, Xun Xi, Shangtong Yang, Chun-Qing Li
International Conference on Durability of Concrete Structures
Corrosion of reinforced concrete is one of the major deterioration mechanisms which result in premature failure of the reinforced concrete structures. Due to the actual diffusion of chloride ingress, the corrosion products distribution is seldom uniform along the reinforcing bar. Recently, some non-uniform corrosion models have been proposed to investigate the corrosion-induced cracking mechanism of concrete. In this paper, a new corrosion model based on von Mises distribution is formulated and validated against experimental data. The developed model is then compared with the existing non-uniform models and the advantages are discussed. To demonstrate the application of the developed corrosion model, …