Retrofitting and Repairing of Heavily Cracked Unbonded Post-Tensioned Structural Systems with Composite Materials

Abstract

The purpose of this project was to use fiber reinforced polymers (FRPs) and high strength adhesives for the repair and retrofit of unbonded prestressed beams. The goal was to study the interaction of the two materials and the basis structural behavior of the repaired or retrofitted beams. The results from the experiment, such as: crack propagations, deflections, load increments, steel strains, and prestressing loads were recorded using auto-data recording system. The general behavior and the strength of each one of the control beams and the corresponding repaired or retrofitted beam was studied