Experimental and analytical behaviour of RC members strengthened by means of a high-performance jacket
Serena Mostosi; Consuelo Beschi; Alberto Meda; Paolo Riva
Appears on pages(s):
High-performance fibre-reinforced concrete, seismic retrofitting, jacketing.
The strengthening of existing reinforced concrete (RC) structures, built according to the Italian construction practice of the ’60-‘70s, has become an important and urgent issue. The
reasons for strengthening are the need for: increasing strength to withstand underestimated loads; increasing the load-carrying capacity; and fulfilling the seismic code requirements. A new technique to strengthen existing RC structures, based on the application of a thin highperformance fibre-reinforced jacket, is investigated herein. The application of this technique
has been studied for the strengthening of beams, columns and beam-column joints by full scale experimental tests which results showed that the application of a high-performance fibrereinforced concrete (HPFRC) jacket leads to a significant increase in strength of the elements, also reaching an adequate level of ductility. Subsequently, the experimental results are
compared with analytical evaluations of the load carrying capacity of the retrofitted elements, showing that the analytical formulations are consistent with the experimental evidence.