In this study, a series of reinforced concrete beams were carried out to determine the size effect of the beams strengthened
with different types of fiber reinforced polymer sheets (FRP). Two types of FRP sheets were considered in this study; Carbon and Glass
fiber reinforced polymer sheets (CFRP and GFRP). FRP sheets were bonded to the soffit of the beams using a two-part Epoxy. These
two types of FRP sheets were used to allow a variety of fabric stiffnesses and strengths to be studied. Also, this study introduced a new
type of anchor to improve the efficiency of the FRP-strengthened beams and to prevent the anchor delamination of the FRP sheets. The
results show that the strengthening system increases the ultimate capacity of the FRP-strengthened beams. Also, this increase depends
on many parameters such as the type of the FRP sheets and size of the tested beams. Moreover, the beam size has significantly effected
on the ductility of testing beams which increases as the size of beams decreases.