Impact of the prestressed FRP on the interfacial stress analysis of structures reinforced by bonded FRP

This paper presents an improved theoretical approach of the structures reinforced with bonded prestressed FRP composites, taking into account loading model, shear lag effect and the prestressed composites impact. These composites are used, in particular, for rehabilitation of structures by stopping the propagation of the cracks. They improve rigidity and resistance, and prolong their lifespan. In this paper, an original model is presented to predict and to determine the stresses concentration at the FRP end, with the new theory analysis approach. This research gives more precision related to the others studies which neglect the effect of prestressed composites coupled with the applied loads. The numerical resolution was finalized by taking into account the physical and geometric properties of materials that may play an important role in reducing the stress values.