Abstract: Based on the continuous damage theory and considering the shear effect on adhesive, a high-order nonlinear FEM model was developed for the coupling of shear/flexure with in-plane deformation of the RC members strengthened with FRP. When strengthened, most failures were found because of the separation of the concrete surface layer near FRP from the protecting layer of reinforcements and few of them were found on the bonded interface between carbon-fiber cloth and concrete or tack coat. To enhance the strength of whole member especially the interlayer as above, short fibers were added to the RC beam especially the lower layer of concrete. It is revealed that the crack propagation is slow, and the mechanic properties of FRP strengthened RC beam with short fibers are thus improved in ductibility especially in carrying ability.