| Title |
Bond-Slip Mechanism for Fiber Reinforced Polymer Sheet-Concrete Interface |
| Keywords |
Fiber-reinforced Polymer Sheet ; FRP ; Local Bond Stress ; Slip ; Concrete ; Interface |
| Abstract |
Among the retrofitting materials, FRP sheets have been used for the retrofitting of a number of existing concrete buildings and structures because of its excellent properties (high strength, lightness and strong durability.) To be an effective retrofitting system, however, bond characteristics between FRP sheets and concrete should be verified. In this study, 18 specimens were prepared for three type FRP sheets(aramid, carbon, and polyacetal) and two type sheet layers(single and double) to evaluate the bond-slip mechanism of FRP sheet-concrete interface. A double shear test was conducted on the specimens under monotonic load. The influences of the sheet type and layer, which are concern with strain distribution, local bond stress, and slip, were observed. The local bond stress-slip relationships were obtained from test results, and Bilinear and Popovics's equation model were used to predict local bond stress-slip relationship for all type specimens. Finally, it was known that a Popovics's model is suitable for the test results. The local bond stress-slip model using Popovics's type was verified through numerical analyses. |