Effect of Corrosion on the Hysteretic Behavior of Steel Reinforcing Bars and Corroded RC Columns

The corrosion of steel reinforcement negatively influences the mechanical performance reinforced concrete (RC) elements reducing both their strength capacity and ductility. Especially in seismic prone areas, degradation cyclic behavior corroded RC is more intense, limiting service life structures leading to premature failures. In present paper, order study degraded embedded (in concrete) under loading, laboratory experiments were performed on reinforcing bars. Thereafter, tests dynamic loadings with gradually increased deformations carried out. From experimental study, hysteretic models non-linear bars extracted non-corroded conditions, case uniform pitting corrosion. Based bars, an analysis response (non-corroded corroded) columns was using OpenSees code. outcomes indicated negative consequences demonstrating mainly local reduction cross-section (pitting corrosion) combined loading history buckling phenomena as main factors which deviate from classic bilinear model monotonic loading.