Influence of Localized Corrosion Damage of Reinforcement on Bonding with Concrete

The most common defect in reinforced concrete structures is corrosion damage to the working reinforcement within the concrete. The primary risks associated with corrosion damage include: the volumetric expansion of corrosion products, which induces additional tensile stresses in the concrete along the bar length leading to spalling of the protective layer; reduction of the working reinforcement diameter; and localized exposure of reinforcement due to the destruction of the protective layer. Numerous methods exist for assessing the stress-strain state of damaged structures, but specific refinements to calculation methods are required for each damage type. This paper presents an analysis of domestic and international literature on the assessment of reinforcement bonding with concrete, along with the authors' experimental test results evaluating bond loss in corrosion-damaged reinforcing bars embedded in concrete.