Anchorage and tension-stiffening effect between near-surface mounted fibre-reinforced polymer rods and concrete

Title: Anchorage and tension-stiffening effect between near-surface mounted fibre-reinforced polymer rods and concrete
Author(s): Firas Al-Mahmoud, Arnaud Castel, Raoul François, Christian Tourneur
Paper category : conference
Book title: 2nd International RILEM Symposium on Advances in Concrete through Science and Engineering
Editor(s): J. Marchand, B. Bissonnette, R. Gagné, M. Jolin and F. Paradis
Print-ISBN: 2-35158-003-6
e-ISBN: 2351580028
Publisher: RILEM Publications SARL
Publication year: 2006
Nb references: 8
Language: English

Abstract: The aim of the experimental program developed in this work was to investigate the possibility of using CFRP rods to reinforce concrete structural members with the Near Surface Mounted Reinforcement (NSMR) technique. The rods were 12-mm diameter carbon-epoxy pultruded FRP. Two interfaces are involved in the NSMR technique: one between the reinforcing composite rod and the filling material and another between this material and the old concrete. The coupling between the two interfaces was studied through two different specimens and two mechanical tests: the usual pull-out test, which assessed the anchoring capacity of the CFRP rods, and the tensile member test, which simulated the behavior of CFRP rod bond in the tensile zone of an RC-structural element after cracking.
One specimen was designed to be easily compared to the usual pull-out and tension test, the other specimen was used to study the specific problems of NSMR: reduction of contact surface and eccentricity.
The experimental results indicate that combining the use of resin as a filling material and CFRP rods as the strengthening material gives satisfactory results for both anchoring and reinforced concrete flexural member strengthening.

Keywords: NSMR; CFRP; Rod; Strengthening; Bond strength.

Online publication: 2006-08-02
Classification: 3.3 Theme 3: Monitoring, Repair and Maintenance of Concrete Structures
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580028.086