Abstract
Bond characteristics for fiber-reinforced polymer (FRP)-strengthened reinforced concrete (RC) beams are usually obtained by pulling a bonded FRP from a concrete block. Although this method effectively simulates the conditions in the anchorage regions of a strengthened beam, the boundary conditions in the anchorage regions differ significantly from those in the regions between the cracks. This paper proposes a new bond test method to mimic the conditions in both the cracked and anchorage regions when steel is present. Cracks are accounted for in this method, as is the interaction between the FRP and the internal steel both before and after yield. The test results showed that the bond models differ significantly in the cracked and anchorage regions. In addition, the steel and its bond stress are shown to affect the bond behavior. Directions for future research are discussed.
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