Parametric analysis on interface stresses of pre-stressed strengthening RC beams with HFRP

Through establishment of FE model,the interface properties of RC beams strengthened by FRP are numerically analyzed by nonlin-ear finite element method.The interface concrete stress of RC beams strengthened by pre-stressed HFRP are parametrically analyzed under the con-ditions of different load,different Young's modulus and thickness of adhesive,different strengthened styles and different prestressed styles.The re-sults show that the shear stress and normal stress of concrete are the peak at the end of interface,and the interface stresses are reducing to zero as the distances increasing from the end of the interface.