Structural behavior of FRP-strengthened reinforced concrete shear walls with openings using finite element method

摘要

Reinforced concrete shear walls with features such as high stiffness, good performance in earthquakes, ductility, and high bearing capacity in earthquake-prone regions are widely used as convenient and reliable structural systems in medium- and high-rise reinforced concrete buildings. However, due to architectural limitations, the use of opening in shear walls is unavoidable. Fiber-reinforced polymer sheets with unique structural characteristics and easy implementation have been used in recent years for rehabilitating concrete structures, especially shear walls. In this study, using the finite element method, the effect of openings with different sizes and locations in reinforced concrete shear walls was studied. The effect of retrofitting specimens with openings by carbon fiber-reinforced polymer sheets with different patterns and thicknesses on the structural behavior of shear walls was also investigated. According to the results, opening reduced the bearing capacity, energy absorption capacity, and stiffness but increased wall displacement. Different reinforcement patterns and different thicknesses of carbon fiber-reinforced polymer sheets had different effects on improved structural behavior of shear walls. Reinforcement with carbon fiber-reinforced polymer sheets is one of the effective ways to rehabilitate concrete shear walls with opening.