Title:
Modeling of FRP-Concrete Bond Using Nonlinear Damage Mechanics
Author(s):
C.A. Coronado and M.M. Lopez
Publication:
Symposium Paper
Volume:
230
Issue:
Appears on pages(s):
373-390
Keywords:
concrete-epoxy interface; finite element modeling; fractureenergy; FRP laminate; numerical modeling; plastic damage; pull-offbond test; softening curve
DOI:
10.14359/14843
Date:
10/1/2005
Abstract:
In this study, experimental and numerical procedures are proposed topredict the debonding failure of concrete elements strengthened with fiber-reinforcedpolymers (FRP). The experimental tests were designed to obtain the tensile softeningcurve and fracture energy of the concrete-epoxy interface. Results indicate that thefracture energies of plain concrete and concrete-epoxy interface are different inmagnitude. The numerical simulations were conducted using a plastic-damage model.In this approach, the damage is defined using the tensile softening curve. Numericalresults were validated against experimental results obtained from pull-off bond tests.The numerical models were capable of predicting the experimentally observed load-strain, strain distributions, failure load, and failure mechanism of the pull-offspecimens.