Cyclic behaviour of R.C. column with corroded reinforcement repaired with HPFRC jacket

The reduction in the useful service-life of reinforced concrete structures, mainly due to reinforcement corrosion, is a cause of concern for several RC buildings. The corrosion damage, often, makes necessary to define strengthening techniques allowing for recovering the initial capacity of the structure. Furthermore, the reduction of strength and ductility, due to corrosion, can jeopardize the behaviour for horizontal loads. In this research, the technique based on the use of High Performance Fiber Reinforced Concrete (HPFRC) jackets with thickness of 30-40 mm, is considered and applied on RC corroded columns. Three full-scale experimental cyclic tests were performed. Besides the reference specimen (UC), one column was tested after the rebars artificial corrosion (c), and the last one, after the reinforcement corrosion, was strengthening with 40 mm thick HPFRC jacket (CR). The tests were performed up to failure by applying cyclic horizontal loads of increasing amplitude for verifying the performances of the proposed solution.