Estudo sobre o comportamento de viga de concreto armado reforçada com tecido de fibra de carbono

Abstract

The reinforced concrete structures are among the most executed constructions in Brazil. Such structures are susceptible to lack of maintenance, design and execution errors and also the change of use to which it was initially intended. Faced with these situations, the elements of the structure may no longer be able to receive the requesting loads. One solution is to use reinforcement with carbon fiber composite in order to ensure its safety, performance and increase the structural capacity. The application of carbon fiber composite brings the advantage of fast application, without adding weight to the structure and without the need for architectural changes. The objective of this study is to verify the behavior of a reinforced concrete beam reinforced with carbon fiber fabric. For this, 9 beams of 12x16 cm and 120 cm were tested, divided in 3 groups, separated by the mode of bounding the carbon fiber fabric. The beams were submitted to flexural test at the gantry available at Federal Technological University of Paraná, which were analyzed from the rupture mode and applied load. The results showed that the application of reinforcement leads to an increase in resistance. However, it is necessary to be aware of the loads and geometric characteristics of the beam to suit the carbon fiber fabric bonding according to its requesting efforts.