Strengthening of Concrete Columns using NSM GFRP Bars

Abstract

In recent times, there has been a significant surge in interest regarding the retrofitting of concrete columns utilizing Near Surface Mounted (NSM) Fiber Reinforced Polymer (FRP) bars due to their numerous benefits, such as more load carrying capacity, increased durability, and improved seismic performance. The purpose of this study is to determine that NSM GFRP bars can effectively strengthen circular, square, and rectangular concrete columns. Eight concrete columns of each shape (circular, square, and rectangle), Two control samples and six retrofitted Samples using various Retrofitting material and ratios were studied. Based on past research, it is projected that retrofitting with NSM GFRP increases the strength and ductility of columns, with the quantity and arrangement of NSM FRP bars being a key factor in overall performance. The report ends by highlighting the practical uses of research findings in construction sector and outlining potential directions for additional study in this area. In conclusion, this study's findings offer convincing proof that using NSM GFRP bars can increase concrete columns strength and durability when is compared to control columns.