Carbon FRP Strengthening of Doubly Curved Precast PC Shell

Abstract

In this paper a recent rehabilitation project completed in Italy using carbon fiber reinforced plastic (CFRP) unidirectional sheets is examined. This technology was selected for the strengthening of a doubly curved, precast, prestressed concrete (PC) shell. The shell was part of the roof of an industrial building and had experienced severe localized damage due to accidental heat radiating from a flue. The selection of the CFRP system involved the screening of different repair procedures with relation to the constraints imposed by the owner: limited disturbance to the industrial process, safety of the occupants, low cost, and durability. In addition, the damaged PC shell was located in the center of the industrial building and did not allow the use of a crane for its replacement. This project demonstrates that the utilization of new materials can provide owners/designers with effective solutions to challenging restoration problems.