The use of fiber reinforced polymer (FRP) materials for structural repair and
strengthening has continuously increased in recent years, due to several advantages
associated with these composites when compared to conventional materials like steel.
This paper presents the results of an experiment at study on the structural behavior of
reinforced concrete columns strengthened with carbon fiber sheets and strips in pre-cut
grooves. The reinforced columns were strengthened before testing. The main tasks of
these experiments were conducted to investigate the effects of additional strengthening
of reinforced columns.