TORSIONAL BEHAVIOR OF REPAIRED REINFORCED CONCRETE BEAMS WITH MULTI-BOUNDARY CONDITIONS

This paper describes a finite element analysis for reinforced concrete beams of multi-boundary conditions end repaired by CFRP and fc85 section tested under pure torsion, classified according boundary conditions in two types cantilever and simply supported beams every type include 13 beams divided according repaired to three groups and control beam. The variables considered for group one and two included the beam faces number that will be strengthened, the effect of CFRP Strips numbers while the third group included repaired by fc85. The results of the repaired test beams revealed that the technique of used thefc85very effective in simply supported beam more than cantilever beam by about 97.5% while used repaired by CFRP more than in cantilever. The torque resistance increased in all beams which repaired by 550.65%, 137% in cantilever beams and 11.78%, 139% in simply supported beams for CFRP and fc85respectively, while the max twist decreased in all beams by 69.46%, 79.5% in cantilever beams and 26.5%, 62.19%in simply supported beams for CFRP and fc85respectively.