Modélisation et analyse paramétrique d’une poutre en béton armée réparée par des matériaux composites

Abstract

This work focuses on evaluating the effectiveness of composite materials, particularly fiber-reinforced polymers (FRP), in repairing reinforced concrete beams damaged by cracking. In response to the growing need for durable rehabilitation solutions, composite materials appear as a promising alternative due to their excellent mechanical properties, light weight, and high resistance to corrosion. The main objective of this study is to model the structural behavior of a cracked concrete beam strengthened with FRP sheets, in order to assess the improvement in performance after repair. An analytical approach based on theoretical models from the literature was adopted, combined with numerical simulations using ABAQUS software to monitor the evolution of stresses and deformations. The results demonstrated that FRP reinforcement significantly enhances load-bearing capacity, reduces crack openings, and improves structural stiffness. This study thus confirms that composite materials represent a reliable and sustainable solution for extending the service life of deteriorated reinforced concrete structures.