Column and Joint Retrofitting with High Performance Fiber Reinforced Concrete Jacketing

A new technique for the strengthening of existing R. C. structures, based on the application of a high performance fiber reinforced concrete jacket, is investigated here. The aim of the research is to study the possibility of using this technique for the seismic retrofitting of existing columns and beam-column joints. Two full-scale tests have been performed: a column-to-foundation joint and a beam-column joint. The specimens have been loaded with static horizontal cyclic loads with increasing amplitude. The results show that with the adoption of this technique it is possible to significantly increase both bearing capacity and ductility of existing R. C. structures.