Prediction of residual carrying capacity of RC column subjected in-plane axial load considering corroded longitudinal steel bars
In this study, a methodology to predict residual carrying capacity of corroded reinforced concrete columns subjected in-plane axial load having several corroded longitudinal steel bars using XTRACT 3.0.8 software, which is based on the deteriorated models of concrete and steel materials. The effects of corrosion of longitudinal steel bars are considered by using deteriorated constitutive law for concrete in compression, steel reinforcement in both tension and compression. The method used is applied on a short column sample with the section of 600 × 600 mm, longitudinal reinforcement ratio of 1.64, and ratio between concrete cover and steel bar diameter of 1.6. In fact, the corrosion does not occurred on whole locations (surface) of structural element. Therefore, this study considers six cases of longitudinal steel bars corresponding different locations in the section to draw the interaction diagram of P-M. These diagrams show that the residual carrying capacity of corroded reinforced concrete columns depends not only on corrosion level but also the corrosion location of longitudinal reinforcement.
RC column; load-carrying capacity; reinforcement corrosion; interaction diagram.
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