Experimental Study on Bond Behavior between CFRP Sheet and Wood

Abstract

Fiber-reinforced polymer (FRP) has been applied to reinforce wood structure with its many advantages. But results of experimental study and engineering practice have showed that the failure is generally caused for lack of bong strength between FRP and wood, so the bond behavior between FRP and wood is very important. In this paper, based on the shear bond experiment between wood and CFRP sheet, the bond properties are researched such as failure character, characteristic of strain distribution, effective bond length and bond strength. Results showed that: at the loaded-end, the strain of the CFRP sheets is the maximum, and then strains decrease quickly with the increase in distance from the loaded-end. Strain distribution along cross direction is not uniform and the strains of the center location are bigger obviously than that of the edge location. The effective bond length between CFRP sheet and wood is more than 120mm.