Effect of Existing Structure and FRP Uncertainties on the Reliability of FRP-Based Repair

Abstract

Externally bonded fiber-reinforced polymer (FRP) has been successfully implemented to repair existing RC structures. Previous studies on the development of a reliability-based design method for externally bonded FRP have considered the additional uncertainties introduced by the FRP, but have relied on descriptions of the existing concrete and reinforcing steel representative of new construction. These descriptions are unlikely to be appropriate for an in-service structure in need of repair. This paper investigates the effects of different levels of uncertainty in existing RC structures and FRP materials on the reliability of repairs designed with ACI 440.2R-08 recommendations. Repairs to restore flexural strength for each beam in an inventory of rectangular and