An efficient material model was developed for reinforcing steel in reinforced concrete (RC) columns that implicitly incorporates the degrading effects of bar-buckling. Utilizing the beam-on-springs model developed by the writers to characterize a buckling bar in a RC column, a comprehensive parametric study was performed to identify the effects of several important column parameters on the buckling behavior of the longitudinal reinforcement in RC columns. Features of average stress-strain curves of compressively loaded reinforcing bars are summarized. Constitutive relations as functions of critical column parameters were developed for direct use in fiber-section model-based nonlinear analysis of RC structures. Comparison of the numerically simulated global response of experimentally tested RC columns confirm the validity and utility of the proposed material model as a simple and effective way to include bar-buckling effects in inelastic analysis of RC frame structures. © 2014 American Society of Civil Engineers.
|Titolo:||Material model incorporating buckling for reinforcing bars in concrete structures subjected to seismic loads|
|Data di pubblicazione:||2013|
|Appartiene alla tipologia:||01a Articolo in rivista|