FRP to concrete or steel bonded joints : Use of the bilinear cohesive zone model to characterize the anchorage zone
Résumé
In the field of structural repair using composite materials, precise reinforcement processes characterization is needed more particularly to identify the way the realised bonded joints function in shear. For a same process being a bonded carbon pultruded plate, experimental series were conducted to characterize this reinforcement when bonded on concrete, and when bonded on steel.The experimental device has been used in numerous related to steel or composite bonded reinforcement [1,2]. The differences in terms of failure mode, and maximum capacity are firstly highlighted. Then, the results are more closely analysed using the well-known bilinear cohesive zone modeling to undersand stress transfer, and joint failure during the test. In the end, the use of a parameter linked to the load/displacement curves is introduced aiming at easing the determination of the typical anchorage length from this kind of experimental investigations.