A computational plastic–damage method for modeling the FRP strengthening of concrete arches

Document Type : Article


Center of Excellence in Structures and Earthquake Engineering, Department of Civil Engineering, Sharif University of Technology, P.O. Box 11365‐9313, Tehran, Iran


In this paper, a computational technique is presented based on a concrete plastic-damage model to investigate the effect of FRP strengthening of reinforced concrete arches. A plastic-damage model is utilized to capture the behavior of concrete. The interface between the FRP and concrete is modeled using a cohesive fracture model. In order to validate the accuracy of the damage-plastic model, a single element is employed under the monotonic tension, monotonic compression, and cyclic tension loads. An excellent agreement is observed between the predefined strain-stress curve and those obtained from the numerical model. Furthermore, the accuracy of the cohesive fracture model is investigated by comparing the numerical results with those of experimental data. Finally, in order to verify the accuracy of the proposed computational algorithm, the results are compared with the experimental data obtained from two tests conducted on reinforced concrete arches strengthened with FRP.


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