Title: Monitoring of RC Beams Using Smart FRP Bonded Material

Author(s): Emmanuel Ferrier, Laurent Michel, Andrea Armonico

Publication: Symposium Paper

Volume: 360

Issue:

Appears on pages(s): 299-317

Keywords: Reinforcement concrete beams monitoring, crack, concrete, FRP, bond, strengthening material, fiber optic sensors.

DOI: 10.14359/51740632

Date: 3/1/2024

Abstract:
This paper presents the crack monitoring of reinforced concrete beams strengthened with fiber reinforced polymer (FRP) sheets. Emphasis is placed on the development of a smart FRP bonded material that can measure the crack opening of a reinforced concrete beam strengthened by FRP. The reliability measured by a conventional digital image correlation (DIC) and by the proposed smart FRP is employed to assess the contribution of the FRP to control the crack. The monitoring process is based on a large set of experimental database consisting of 19 test beams. The effect of FRP to control the crack opening is studied depending on the steel ratio, FRP ratio and the level of damaged of RC beams when FRP is applied. The results were compared with the theoretical values of crack width and spacing predicted using the Eurocode 2 (EC2) formula, calibrated for non-strengthened RC elements. The corresponding results were compared in order to clarify the effect of external bonded FRP on the cracking behaviour of RC beams.