An anchoring device for anchoring tendons for structural reinforcement. The anchoring device has a longitudinal central axis defining an axial direction. The anchoring device includes an outer barrel and an inner wedge. The outer barrel has a cylindrically or frusto-conically shaped inner surface defining a cylindrically or frusto-conically shaped inner space. The inner wedge has a frusto-shaped outer surface and a coaxial bore. The shaped inner space is configured for allowing the inner wedge to be positioned in the shaped inner space of the outer barrel in the axial direction. The coaxial bore of the inner wedge is configured for receiving a tendon. The inner wedge includes inner and outer portions, the inner portion overlapping the outer portion as seen in a radial direction. The inner and outer portions are separated by a cut configured for increasing the overlap of the inner and outer portions upon exertion of radially compressive forces on the wedge, thereby reducing the circumference of the coaxial bore upon interaction with the outer barrel.