In recent decades, buildings have suffered damage due to natural disasters such as earthquakes, floods, and heavy snowfalls. One of the effective methods for reducing damage is the strengthening, rehabilitation, and retrofitting of existing structures. In this context, the use of Fiber Reinforced Polymer (FRP) composites, particularly in concrete structures, has gained significant popularity. The growing use of these materials can be attributed to their distinct advantages over traditional materials such as steel.
Parameters such as the orientation, alignment, and number of FRP layers have a considerable impact on the behavior of strengthened columns and are frequently investigated through analytical and experimental studies. The results indicate that increasing the number of FRP layers leads to an improvement in ultimate strength, ultimate displacement, and ductility. Moreover, the layer arrangement of the FRP sheets has a distinct influence on the behavior of reinforced concrete columns.