To restore a damaged building that has experienced a destructive earthquake, various repairing techniques have been proposed. Using Fiber Reinforced Polymer (FRP) laminates as an innovative construction material with suitable mechanical properties has been recently considered by researchers and engineers for retrofitting as well as repairing of existing reinforced concrete (RC) elements.
In this article, the results of an experimental study which was conducted to assess the efficiency of this repairing technique for damaged RC beams under flexural cyclic loading are presented. The test specimens include 5 full scale pre-damaged RC beams that were repaired with the proposed method at earthquake laboratory of Shiraz University of Technology. The test specimens were subjected to both monotonic and cyclic loadings after repairing procedure. FRP laminates thickness, loading type and wrapping condition of FRP laminates were the parameters examined in this study. Test results indicate that the repairing technique can restore the flexural capacity of the beams. In addition, wrapping the longitudinal laminate have an important role on the efficiency of the technique, especially under cyclic loadings.