Paper number 417
|EVALUATION OF DEBONDING ENERGY RELEASE RATE OF EXTERNALLY BONDED FRP SHEETS FOR REHABILITATION OF INFRASTRUCTURES|
Koji YAMAGUCHI1, Isao KIMPARA1, and Kazuro KAGEYAMA1
1Department of Environmental & Ocean Engineering, The University of Tokyo
7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
|Summary||A new peeling test method of FRP sheets bonded on mortar and concrete was proposed to characterize the peeling strength in term of the debonding energy release rate. In addition to this, the two methods of data reduction for this test method were proposed from the viewpoint of fracture mechanics and theory of elastic thin membrane. The application and the limitation of the proposed data reduction methods were examined by the experiments and the FEM analysis. It was shown that the mode II energy release rate in this test method always makes up over 80% of the total energy release rate based on the FEM analysis. The effects of different surface treatments and different base materials on the peeling strength of FRP sheets were successfully evaluated based on the proposed data reduction.
||Keywords|| energy release rate, debonding, peeling test, bonding strength, externally bonded FRP sheets, rehabilitation of infrastructure, elastic membrane.
Theme : Reinforcement and repair in Civil Engineering and Building Construction
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