This paper presents a bond-slip model for interfaces between near-surface mounted (NSM) CFRP strips and concrete where debonding occurs due to cohesion failure in the concrete adjacent to the CFRP strip. This bond-slip model was derived on the basis of numerical results from a parametric study conducted using a verified 3-D meso-scale finite element (FE) model. In the proposed bond-slip model, the concrete compressive strength and the groove height-to-width ratio are the two main parameters: the former indicates how strong the concrete itself is while the latter represents the level of confinement provided by the surrounding concrete to the bonded interface. The proposed bond-slip model provides an essential building block for an FE model for predicting debonding failures of RC structures strengthened with NSM CFRP strips.
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11th International Symposium on Fiber Reinforced Polymers for Reinforced Concrete Structures (FRPRCS-11)
Zhang, S. S., Teng, J. G. & Yu, T. (2013). Bond-slip model for interfaces between near-surface mounted CFRP strips and concrete. In J. Barros & J. Sena-Cruz (Eds.), 11th International Symposium on Fiber Reinforced Polymers for Reinforced Concrete Structures (FRPRCS-11) (pp. 1-7).