Theoretical effects of corrosion on lateral stress along reinforcement bars in concrete

Literature review of latest research findings on the bond behavior of corroded reinforcing steel bars suggests that the bond mechanism is minimally affected by corrosion. However, discrepancies exist among research concerning the influence of corrosion on the critical parameters that govern bond behavior of bars. Former studies have primarily focused on the diminishing bond strength caused by corrosion. Several key factors influencing bond strength have been identified, including corrosion of the main bar, concrete cover thickness, concrete type, stirrups, stirrup corrosion, and corrosion rate. However, existing bond strength models are largely based on specific test results and lack generalizability. This work is a part of a wider study aiming to evaluate main concrete and steel parameters effect on corroded reinforced concrete structures. The scope of present paper is to evaluate the effect of several parameters on bond behavior. Some concrete exposure classes are considered, and corrosion process is simulated using a non-linear analytical model. Three bond theories are considered to have comparative results. Corrosion simulation has been done using different concrete and steel parameters to evaluate their effects on RC corroded elements' bond capacity.