Strengthening of RC members with near-surface mounted CFRP rods

Firas Al-Mahmoud (1) , Arnaud Castel (2) , Raoul François (2) , Christian Tourneur (3)

1 IJL - Institut Jean Lamour
2 LMDC - Laboratoire Matériaux et Durabilité des constructions
3 Freyssinet International

The aim of the experimental programme developed in this work was to investigate the possibility of using Carbon Fibre-Reinforced Polymer (CFRP) rods to strengthen concrete structural members with the near-surface mounted reinforcement (NSM) technique. The global behaviour of reinforced concrete beams strengthened by NSM and subjected to flexure was investigated. The rods were 6 and 12-mm-diameter carbon-epoxy pultruded FRP. Two vibrated concrete compositions were tested: conventional (VC30) and high-strength (VC60), and two filling materials: resin and mortar. The study was carried out up to the failure load. A comparison was made between the experimental results and the existing analytical models. The experimental results indicate that strengthening concrete structural members with the near-surface mounted reinforcement (NSM) gives satisfactory results.

Mots clés: NSM reinforcement; CFRP rods; Filling material; Flexural strengthening; Global behavior; Analytical modeling

Domaines: Génie civil

Firas Al-Mahmoud, Arnaud Castel, Raoul François, Christian Tourneur. Strengthening of RC members with near-surface mounted CFRP rods. Composite Structures, 2009, 91 (2), pp.138-147. ⟨10.1016/j.compstruct.2009.04.040⟩. ⟨hal-02335867⟩