Abstract
Fibre-reinforced polymers (FRP) are effective for masonry reinforcement, but performance depends on bonding capacity, but performance depends on the bonding capacity. This paper analyses the shear behaviour of the FRP-to-masonry interface and uses the synergistic strengths of different investigation tools to characterise the debonding process. Twelve shear tests were carried out, using FRPs with three different fabrics. Using digital image correlation and Wu’s model, the parameters of the bond–slip laws are determined. α is constant. α/β is a function of stiffness at power −0.5. The cumulative acoustic amplitudes increase significantly for a slip inversely proportional to α (R2=0.926) and with a slope proportional to the fracture energy (R2=0.810). The high frequency partial power increases sharply at a load for which the model predicts debonding at the sensor, or because of a textile tensile failure. The linear location obtained with AE makes it possible to differentiate these two failure modes.
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