It is known that the tensile strength of FRP rod is influenced by the loading direction and diagonal tensile strength is less than uniaxial tensile strength. Therefore the FRP rod would fracture under a tensile stress which is less than the uniaxial tensile strength due to the secondary stress at a crack intersection in concrete. This paper shows that finite element analysis with consideration of the geometrical nonlinearity is applicable to predict the relationship between the deformation and applied force of FRP rod under the combined tensile and shear stress at the crack intersection of concrete. Furthermore, the fracturing stresses of FRP rod are predicted by using the experimental and analytical results.