This study presents an analysis of cyclic in-plane behavior of damaged masonry walls retrofitted with fiber-reinforced polymer (FRP) using finite element method (FEM), highlighting the material's efficacy in enhancing structural integrity and durability. The thesis aims to investigate the effectiveness of FRP retrofitting in improving the seismic performance of masonry walls that have sustained damage. The study involved the creation of three-dimensional FEM models of masonry walls, which were subjected to cyclic loading under different conditions. The results showed that the use of FRP composites can significantly improve the strength, stiffness, and ductility of damaged masonry walls under cyclic loading. The findings of the study provide valuable insights into the behavior of retrofitted masonry walls and can aid in the development of effective seismic retrofit strategies for such structures. The analysis is performed using the Abaqus software, which is widely used in the engineering community for simulation and modeling. The results of the study provide insight into the behavior of retrofitted masonry walls under cyclic loading, which can inform the design of retrofitting strategies for existing buildings in seismic areas. The goal of modifying walls with fiber reinforced polymer (FRP) composites is to improve the structural strength and durability of the walls. FRP composites are made of strong fibers embedded in a polymer matrix, and when applied to walls, they can increase their load-carrying capacity, resistance to deformation, and resistance to environmental factors such as corrosion and moisture. Numerical modification refers to using computer simulations to analyze the behavior of the walls and predict how they will respond to different types of loads and stresses. By modifying the positions of the reinforcement within the FRP composite, engineers can optimize the performance of the walls and ensure that they meet design specifications. Some different positions of reinforcement that can be modified using numerical simulation include varying the number and spacing of layers of FRP, changing the orientation of the fibers, and adjusting the thickness of the FRP layers in different areas of the wall. These modifications can improve the overall strength and stiffness of the wall, as well as enhance its ability to resist shear and bending forces. Overall, the use of FRP composites and numerical modification techniques can significantly enhance the performance of walls in a variety of applications, from building construction to infrastructure projects.
