Comparison between carbon and steel fiber reinforced polymers with or without anchorage - CICE 2012

Proceedings of CICE 2012 6th International Conference on FRP Composites in Civil Engineering - Rome, Italy, 13-15 June 2012 

The aim of this study is to investigate the shear behavior of reinforced concrete beams strengthened with either Carbon (CFRP) or Steel (SFRP) fiber Reinforced Polymers. The investigation also includes the use of an anchoring system. The strengthened reinforced concrete beams along with a non-strengthened control beam were tested monotonically under four point bending loading conditions. Moreover, an analytical model is introduced, that can be used to analyze the shear performance of the strengthened beams. Totally nine 1:1 scale beams with a span of 3000mm where fabricated and tested. The experimental results indicate that the failure of the strengthened beams was based on the debonding of the strengthening sheet when no anchoring system was used. At the other cases the failure occurred due to fracture of the FRP sheet or failure of the anchoring system. Furthermore, the use of a anchoring system increases the overall capacity of the beam. In conclusion a strengthening system with SFRP can provide an effective alternative to commercially available systems.
Keywords: Anchorage, Carbon fiber reinforced polymers (CFRP), Reinforced concrete Beams, Shear Upgrade, Steel fiber reinforced polymers (SFRP)