This research features the anchorage system for fiber sheets in the strengthening of reinforced concrete structures. This anchorage consists of steel angles and anchor bolts. Two series of tests are performed with an objective of investigating the influence of the anchorage method on the bond strength and failure pattern. The one is the bond test between steel plates and fiber, the other is tensile test using a new type of specimen, which represents a corner part of a column with wall or a beam with slab, that were strengthened with CFRP sheets.
Experimental results show that the rigidity of the angle plate and anchor bolt very much influences the bond strength of CFRP sheets. By using angle plate strengthened with rib, the bond strength of CFRP sheets is further increased. Replacing the angle plate and the anchor bolt to beam element model, the relationship between the strength and deformation of the angle plate at bond slip failure is evaluated by elastic calculation.
