The effect of the interface properties such as stiffness and the strength on the pull-out behavior of a post-installed anchor bar is investigated using a multi-layer analytical model in this study. The anchor bar is such that used in the…
The effect of the interface properties such as stiffness and the strength on the pull-out behavior of a post-installed anchor bar is investigated using a multi-layer analytical model in this study. The anchor bar is such that used in the concrete jacketing method to strengthen reinforced concrete bridge piers. The me- chanical properties of the infill layer are different from the surrounding concrete. Therefore the existing pull- out model of deformed bars cannot be applied directly in this case. By the sensitivity analysis the effect of these parameters is clarified on the load-displacement curve, shear stress distribution, de-bonded length and the damage of the surrounding concrete. Then the optimum combination of these parameters is investigated. From the above analysis, it is confirmed that the elastic modulus of the interface should be large to reduce the pull-out displacement and the increase of the shear strength of the interface makes the pull-out load larger.