Global energy balance-based debonding modeling of NSM FRP-strengthened concrete beam

摘要: An important advantage of the near surface mounted (NSM) technique for concrete beam strengthening over externally bonded reinforcement is its higher resistance to debonding failures. Despite increased resistance, failures do still occur on NSM strengthened beams. The aim this paper investigate possibility using a global energy balance based fracture mechanics model methodology includes determining available propagation interface flaw. Debonding failure occurs when flaw reaches Mode I concrete, as weakest material concrete-fiber reinforced plastic (FRP) composite system. validation published experimental results demonstrates that capable predicting possible modes FRP beams and any geometric properties beams, adhesive, FRP. Validation against yields satisfactory performance model. mean ratio between simulated loads 0.99 with standard deviation 0.09.