Effectiveness of U-Shaped CFRP Wraps as End Anchorages in Predominant Flexure and Shear Region

摘要

U-shaped external anchorage have been used to enhance the shear resistance and performance of RC beams strengthened by externally bonded CFRP plates but the reported results are not adequate yet to draw rational conclusions. One factor that could affect the ultimate strength and mode of failure is the depth of the end anchorage used. Varying end anchorage depths were considered in this study to investigate the effectiveness of U-shaped end anchorages along with determining ultimate load carrying capacity and failure modes of strengthened beams in predominant flexure and shear loading regions. Full depth U-shaped anchorages at plate cut-off points were found to be effective in strengthened RC beams in the predominant shear loading region while depth of the end anchorage was not found to be factor that affects the load carrying capacity of the strengthened RC beams.