Most of the existing reinforced concrete (RC) structures are decades old and were designed for gravity loads. It is also evident that most of the existing RC structures are affected by the corrosion. In RC structures, exterior beam-column joints are crucial members. In view of this, numerical investigations are carried out in this study, to evaluate the performance of the gravity load designed (GLD) uncorroded and corrosion affected beamcolumn sub-assemblages under reverse cyclic loading. Non-linear finite element analysis (NLFEA) program has been employed for analysing the beam-column sub-assemblages under cyclic loading and the results of uncorroded GLD specimen are well corroborated with that of the experimental results. Further, performance of the corrosion affected beam column sub-assemblages has been studied by incorporating the changes in mechanical properties and bond-slip properties of corrosion affected steel reinforcement. Load-displacement hysteresis and strength degradation of uncorroded and corrosion affected exterior beam column subassemblages are also presented in the paper.

Keywords: Beam-column sub-assemblage, Strength degradation, Gravity load designed, Corrosion affected, Nonlinear analysis, Bond-slip, Cyclic loading.