Fires on reinforced concrete structural members were analyzed in-depth; to address the effects of the fire that mostly happened on the structure. Unlike rural areas, the effects of a fire on urban areas can be worse. Buildings are not adequately designed for fire since most standards ignore that possibility. By modeling twenty one different composite strengthened reinforced concrete beam samples using finite element method analysis software, flexural performance of fire-damaged reinforced concrete beams strengthened with carbon fiber- reinforced polymer plates were analyzed. The main goals of this research are to study the effects of fire scale, effects of CFRP plate width and effects of CFRP plate thickness on flexural performance of fire-damaged reinforced concrete beams strengthened with carbon fiber- reinforced polymer plates. The study expected the outcome that flexural capacity enhancement and ductility index lowering when fire damaged reinforced beams are strengthened by carbon fiber reinforced polymer plates. According to the study, the ultimate strength of the beam decreased by 21% and 29% if the beam is exposed for 500 o C and 800 o C respectively. If the RC beam is strengthened by CFRP, the ultimate strength of the beam is increased by 85%, 78% and 46% if bottom face, right and sides and all sides of the beam is exposed for 500 o C respectively. CFRP plates enhanced the yield and ultimate strength of the fire-damaged beams by up to 97% and 103%, respectively. 0 o carbon fiber reinforced polymer plate is more efficient than 45 o and 90 o for strengthening fire damaged beams. However, the thickness and width of the CFRP plate have no significant factor on strengthening the beam. Keywords: ANSYS; fire; reinforced concrete; carbon fiber reinforced polymer; ISO 834