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Abstract
The aim of this thesis is to study different repairing techniques of pre-cracked connections using traditional and modern techniques. Ten specimens were fabricated; half of them were subjected to opening bending moment while the rest were subjected to closing bending moment. The studied specimens were repaired using CFRP sheets with different application methods (fully wrapped by one layer or two layers and other applied on the sides and two specimens were repaired using steel plates). The comparison between the results showed that using CFRP sheets increases the capacity of the specimens