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Pure compression behavior of hybrid FRP composite strengthened RC columns after severe damage
S. Jain, M. Chellapandian,
Published in International Institute for FRP in Construction (IIFC)
2018
Volume: 2018-July
   
Pages: 453 - 459
Abstract
Reinforced Concrete (RC) columns are the key loading bearing elements which undergo severe damages under earthquake, impact, and temperature loadings. The effectiveness of a particular strengthening technique depends on its ability to improve the performance of the member under different loading conditions. In this study, hybrid FRP strengthening of RC column elements is investigated by a combination of Near Surface Mounting (NSM) and External Bonding (EB) strengthening schemes. NSM Carbon Fiber Reinforced Polymers (CFRP) laminates are used as additional longitudinal reinforcement. The performance of NSM laminates can be further enhanced when it is confined using EB CFRP fabrics resulting in improved performance of RC element. In total, six square RC columns are cast. The specimens are initially tested under axial compression in a displacement control up to a failure strain of concrete (εcu=0.004). Thereafter, the specimens are repaired using (i) high strength cement mortar (ii) NSM strengthening (iii) hybrid FRP strengthening. Test results show that the specimens strengthened using hybrid FRP technique resulted in the best performance in restoring the strength, stiffness, and ductility of the columns by more than 100% when compared to the original column element. © INTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering. All rights reserved.
About the journal
Journal9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering, CICE 2018
PublisherInternational Institute for FRP in Construction (IIFC)