Inelastic buckling of reinforcing bars: A state-of-the-art review of existing models and opportunities for future research
Mohammad M. Kashani
Abstract
Despite the substantial steps made in understanding the mechanics of reinforced concrete structures, effectively addressing, and mitigating inelastic buckling remains a complex and enduring challenge. Consequently, this paper provides a comprehensive review of all the previous studies on modelling the inelastic buckling of reinforcing bars, and the capability of current state-of-the-art numerical models to simulate the nonlinear stress-strain response of reinforcing bars with the effect of buckling under monotonic and cyclic loading. This review paper consists of four different clusters including: (i) inelastic buckling of reinforcing bars under monotonic loading with and without corrosion, (ii) inelastic buckling of reinforcing bars under cyclic loading with and without corrosion, (iii) influence of inelastic buckling on low-cycle fatigue life of reinforcing bars with and without corrosion, and (iv) influence of tie reinforcement on global stability of longitudinal bars and buckling length calculation. For each group, a summary and critical review of all the previous research is provided. A quantitative comparison between the most widely used uniaxial material models have been made and their performance have been assessed against experimental data. Finally, the current limitations in existing literature are examined, unresolved issues for future research are identified, and some recommendations for future research are suggested.