A New Set-Up for FRP-Concrete Stable Delamination Test

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Title: A New Set-Up for FRP-Concrete Stable Delamination Test

Author(s): C. Mazzotti, M. Savoia, and B. Ferracuti

Publication: Special Publication

Volume: 230

Issue:

Appears on pages(s): 165-180

Keywords: concrete; delamination; experimental study; FRP; interface

Date: 10/1/2005

Abstract:
Results of an experimental campaign on FRP – concrete delamination arepresented. Two specimens have been tested by using a particular experimental set-upwhere a CFRP plate has been bonded to concrete and its back side fixed to an externalrestraining system. The adopted set-up allows a stable delamination process andtransition between two limit states (perfect bonding and fully delaminated plate) to beobserved. Both strain gages along the FRP plate and LVDT transducers have been used.Starting from experimental data, shear stress – slips data have been computed. A nonlinear interface law has been calibrated and compared with analogous results obtainedby a more conventional experimental set-up. A numerical bond – slip model has beenused, adopting the above mentioned law for the FRP – concrete interface to simulateexperimental tests. Numerical results are found to be in good agreement withexperimental results.