REHABILITACIÓN DE VIGAS DE CONCRETO USANDO FIBRAS DE CARBONO

Abstract

Reinforcing techniques of damaged concrete structures using Carbon Fiber Reinforced Polymer (CFRP) have been globally explored by their low weight, easy application and adequate resistance. Nevertheless, the high cost of these fibers limits their use in underdeveloped countries such as Mexico. In addition, an irrational use of these composed materials could result in excessive duration of reinforcement work. In order to diminish these problems, the present work contributes with the optimization of time and amount of fibers (associated to the cost) parameters in the use of the CFRP for reinforcing of concrete beams fulfilling, logically, with the failure and service limit states. Thus, numerical models of repaired beams, subject to gravitational load, based on conventional configurations from the literature were defined. These models were calibrated using laboratory tests including the nonlinear behavior of the materials associated with damage. Results show that the optimized configurations behave more efficiently than the conventional ones. In addition, a new configuration is proposed (denominated X) that could be used as an option to reinforce concrete beams under flexural and shear stresses due to the load capacity and quantity of CFRP advantages