Experimental and analytical behaviour of RC members strengthened by means of a high-performance jacket

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Title: Experimental and analytical behaviour of RC members strengthened by means of a high-performance jacket

Author(s): Serena Mostosi; Consuelo Beschi; Alberto Meda; Paolo Riva

Publication: Special Publication

Volume: 310

Issue:

Appears on pages(s): 203-208

Keywords: High-performance fibre-reinforced concrete, seismic retrofitting, jacketing.

Date: 3/17/2017

Abstract:
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.