Hybrid Anchors in Reinforced Concrete Slabs Strengthened with FRP Sheets

Al-Atta B., Kalfat R., Al-Mahaidi R., Al-Mosawe A.

10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE), İstanbul, Turkey, 8 - 10 December 2021, vol.198, pp.1364-1372 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 198
  • Doi Number: 10.1007/978-3-030-88166-5_118
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.1364-1372
  • Keywords: Carbon fibre, Patch anchors, Spike anchors, FRP anchors, Flexural strengthening, FIBER PATCH ANCHORS
  • Istanbul Technical University Affiliated: No


Reinforced concrete (RC) slabs strengthened with carbon fibre reinforced polymer (CFRP) and subjected to flexural actions may experience many types of failure, including FRP debonding, FRP rupture and concrete crushing. Of these different types of failure modes, FRP debonding stands out as the most predominant type of failure because of its dependence on the relatively weak bond interface between the soffit of the RC member and the FRP sheet attached to it. Many anchorage systems have been developed to enhance the performance of strengthened systems, one of which is the hybrid anchor, which combines the effects of patch anchors and spike anchors. Hybrid anchors have shown significant enhancement when used with RC members subjected to shear forces. This study explores the effectiveness of hybrid anchors in slabs subjected to flexural actions. This study reports an experimental program in which four slabs were subjected to 6-point bending tests. The results show improvement in the maximum load at failure and a significant improvement in ductility.