Finite element analysis of anchorage systems for flexural strengthening of concrete slabs using FRP materials

Carbon fibre reinforced polymer (CFRP) has become one of the most significant methods of strengthening which can be used for enhancing the capacity of structural elements. However, extensive research has shown that the effectiveness of such strengthening systems is highly dependent on the bond properties between the CFRP composite and the concrete. Therefore, failure of strengthened systems is usually governed by the debonding of the CFRP composite. To mitigate this type of failure, a variety of anchorage systems can be used to prevent CFRP debonding. Recent studies have shown the efficiency of patch anchors, which increase the load capacity and ductility of reinforced concrete (RC) members subjected to shear and flexural actions. This paper presents a 2-D finite element model in order to study the efficiency of patch anchors in anchoring RC slabs subjected to flexural loads.