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Title: An Analytical Model for FRP Debonding in Strengthened RC Beams under Monotonic and Cyclic Loads

Author(s): Reza Saeidi Moein, and Abbas Ali Tasnimi

Publication: IJCSM

Volume: 10

Issue: 4

Appears on pages(s): 499–511

Keywords: analytical model, CFRP laminate, debonding, experimental study, RC beam, strengthening

DOI: 10.1007/s40069-016-0172-5

Date: 12/30/2016

Abstract:
Reinforced concrete (RC) beams strengthened by externally bonded reinforcement often fail by debonding. This paper presents an experimental and analytical study aimed at better understanding and modeling the fiber reinforced polymer (FRP) debonding failures in strengthened RC beams under monotonic and cyclic loads. In order to investigate the flexural behavior and failure modes of FRP-strengthened beams under monotonic and cyclic loadings, an experimental program was carried out. An analytical study based on the energy balance of the system was also performed. It considers the dominant mechanisms of energy dissipation during debonding and predicts the failure load of the strengthened beams. Validation of the model was carried out using test data obtained from the own experimental investigation.