The method of strengthening concrete structures with carbon fiber-reinforced polymer (CFRP) composites has seen rapid growth in recent years. Therefore, an experimental program was conducted to investigate the effects of CFRP on behavior and ultimate strength of shear deficient (without stirrups) reinforced concrete (RC) beams. Specimens, one of which was the control specimen and the remaining four were the shear deficient specimens, were tested to investigate the effect of CFRP strips on behavior and strength. Three shear deficient specimens were strengthened with side bonded, U jacketed and IT-jacketed CFRP strips, and remaining one tested with its virgin condition without strengthening. The type and arrangement of CFRP strips and the anchorage used to fasten the strips to the concrete are the variables of this experimental work. The purpose was to obtain ductile flexural behavior from the shear deficient reinforced concrete beams and to analyze the behavior and failure modes of T-section RC beams strengthened with externally bonded CFRP strips. The test results confirmed that all CFRP arrangements differ from CFRP strip orientation and anchorage usage, improved the strength and behavior of the specimens in different levels significantly.