METHOD OF MANUFACTURING PRESTRESSED CONCRETE

摘要

A method of manufacturing a prestressed concrete, comprising the steps of passing fiber bundles (13a, 13b) extended from parallel chord carbon fiber cables (10) into a sheath (21) by folding up, installing U−shaped carbon fiber anchors (33) (flush anchor) thereto, fixing the fiber bundles with room temperature setting adhesive agent (12), after the setting of placed concrete (23), stretching the parallel chord carbon fiber cables (10) through temporary anchors (40a, 40b), setting grout material (22) filled in the sheath (21), releasing a stretching force by separating the temporary anchors (40a, 40b) to act the contractive force of the parallel chord carbon fiber cables (10) on a prestressed concrete member (20) and, when a pretension system is used, adhesively fixing a plurality of main reinforcements having the plurality of parallel chord fiber cables (10) disposed, thereon, parallel with each other and wound, thereon, with carbon fiber hoops, filling concrete while stretching the main reinforcements, and releasing the stretching force of the main reinforcements after the placed concrete (23) is set, whereby a prestressed concrete member providing excellent mechanical characteristics, fatigue strength, and corrosive resistance can be manufactured at a low cost with less looseness of the parallel chord carbon fiber cables (10) used as stretching materials and without requiring a steel anchor.