Envelope Response of Corroded RC Circular Columns Strengthened with Hybrid Fiber Reinforced Polymers
Corroded RC columns do not possess necessary ductility to dissipate seismic energy during a major earthquake, the study investigates the use of hybrid fiber reinforced polymer (FRP) wrapping as a method of retrofitting non-ductile corroded RC columns, and a model to determine the envelope response of RC corroded columns strengthened with hybrid FRP are presented based on cross-section analysis for undamaged RC element. The results show that the technique of strengthening corroded RC column with hybrid FRP is quite effective, the envelope curve estimated using the linear plane assumption with modification by reinforcement slip model, may still be used as the envelope curve of RC corroded columns strengthened with hybrid FRP, a good agreement between analytical and experimental results is observed.
J. H. Li et al., "Envelope Response of Corroded RC Circular Columns Strengthened with Hybrid Fiber Reinforced Polymers", Advanced Materials Research, Vols. 255-260, pp. 3124-3128, 2011