Anchor for reinforcing bar made of fiber-reinforced plastic and manufacturing method therefor

An anchor for a reinforcing bar made of fiber-reinforced plastic, comprising:

• a first anchor piece made of a first elongated metal plate and having a first contacting surface;
• and
• a second anchor piece made of a second elongated metal plate and having a second contacting surface that detachably contacts the first contacting surface of the first anchor piece;
• wherein:
• a plurality of elongated holes is defined in each of the first and second anchor pieces such that the elongated holes each extend in parallel in a width direction of each of the first and second anchor pieces;
• the elongated holes are defined at equispaced intervals in a longitudinal direction of each of the first and second anchor pieces, the longitudinal direction being perpendicular to the width direction;
• at least one locking half portion is defined on each of the first and second anchor pieces between adjacent ones of the elongated holes and has a convex semicircular shape that protrudes in a direction away from first and second contacting surfaces of the first and second anchor pieces;
• the at least one locking half portion of the first anchor piece and the at least one locking half portion of the second anchor piece together form an annular locking portion defining an interior space that is circular in transverse cross-section;
• and
• at least a portion of the interior space has a diameter in the transverse cross-section that is smaller than the diameter of the reinforcing bar made of fiber-reinforced plastic such that the at least one locking half portion of the first anchor piece and the at least one locking half portion of the second anchor piece will bite into and engage the reinforcing bar in the state in which a reinforcing bar is disposed in the interior space, the first and second anchor pieces are affixed to each other and a force that tensions the reinforcing bar is applied to the anchor.