Abstract
Rebar corrosion is the most frequently observed deterioration mechanism in reinforced concrete (RC), commonly affecting marine, parking and bridge structures. Recently, research efforts have been directed in understanding the effects of corrosion on the performance of RC structures to rationally prioritize the maintenance/repair works. Towards this aim, non-linear finite element analysis (NLFEA) can be used as a tool to simulate the effects of corrosion on the global structural behaviour. In this study, detailed modelling of corroded RC beams is carried out, using 2D-NLFEA. A number of experimentally tested corroded beams are modelled and a good agreement is observed between the numerical loaddeflection responses and published data. The numerical models are used to investigate the sensitivity of the predicted response of under-reinforced beams affected by different corrosion damages (i.e. varying corrosion levels, types and locations). The numerical results indicate that the load-deflection curves of the corroded beams are unaffected by impaired bond performance, caused by moderate levels of corrosion. However, notable changes in the predicted cracking patterns and widths are observed. It is also shown that considering the damage of concrete in compression due to corrosion is vital for an accurate structural assessment at both the serviceability (SLS) and ultimate (ULS) limit states. Finally, the results indicate that this modelling approach captures, with sufficient accuracy, the changes in structural response including progressive damage and failure modes.