Traditional metallic materials lead steel-reinforced concrete structures to a durability problem due to its low value of resistance to corrosion. The superior performances of FRP, including the high resistance to corrosion, the flexible and complex shapes… give it a big advantage. However, premature failure due to debonding of adhesives between concrete and reinforcing materials is the major concern for all types of reinforcement containing FRP plate reinforcement. This thesis gradually develops three elastic foundation models, which are mainly derived from the solution of superficial stress in the foundations-soil system. The one-parameter Winkler’s elastic foundation model is simple and easy. The two-parameter elastic foundation model thinks over the interfacial shear force of the joint bond. And the three-parameter foundation model additionally considers the adhesive layer’s transverse displacement to meet the boundary condition of zero shear stress. Finite element analysis (FEA) is used to compare with the proposed three foundation methods.