Renforcement Parasismique Intelligent des Structures à l’Aide des Systèmes Innovants Appliqué aux Bâtiments Existants et Neufs

Abstract

The vulnerability of reinforced concrete structures to seismic actions represents one of the major challenges in the field of civil engineering, particularly for buildings designed according to outdated codes or exhibiting deficiencies in strength and stiffness. In this context, structural strengthening techniques offer effective solutions for enhancing structural performance and extending the service life of existing structures. Among these techniques, Carbon Fiber Reinforced Polymer (CFRP) strengthening and concrete jacketing are widely recognized as efficient rehabilitation methods. This study aims to evaluate the effectiveness of these two strengthening techniques in improving the seismic behavior of reinforced concrete elements. The influence of each strengthening method on the mechanical and structural characteristics of the strengthened elements is investigated through the assessment of key performance indicators, including strength, stiffness, ductility, energy dissipation capacity, as well as the evolution of deformations and displacements under seismic loading. The results demonstrate that both CFRP strengthening and concrete jacketing significantly enhance the structural performance of reinforced concrete structures. These techniques increase load-carrying capacity, improve seismic response, and reduce the level of damage that may occur during earthquake events. Furthermore, the study highlights that the selection of the most appropriate strengthening technique depends on the geometric and mechanical characteristics of the structure, its level of deterioration, and the objectives of the rehabilitation program. The findings confirm the importance of modern strengthening techniques as effective and economical solutions for improving the safety of existing structures, reducing their seismic vulnerability, and ensuring their long-term durability and performance.