Material Characterization of the Concrete-Epoxy Interface under FRP Uwraps

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Title: Material Characterization of the Concrete-Epoxy Interface under FRP Uwraps

Author(s): Jaeha Lee and Maria M. Lopez

Publication: Special Publication

Volume: 286

Issue:

Appears on pages(s): 1-12

Keywords: Concrete, FRP, FRP Uwrap, Fracture mechanics, Interface

Date: 5/1/2012

Abstract:
This study focuses on the characterization of the fracture properties of the concrete-epoxy interface (CEI) under FRP sheets and FRP Uwraps. In particular, the Mode I and Mode II fracture energies are obtained with and without the effect of the FRP Uwrap anchor. Results indicate that fracture energy of the CEI increases due to the confining effect of Uwrap. These material properties, along with a proposed bond-slip model, are used in numerical simulations of concrete elements strengthened with externally bonded FRP sheets and anchored with FRP Uwraps. Results show that the characterization of the fracture properties of the CEI is needed to accurately predict the complex behavior of the CEI under the FRP Uwrap.