| 摘要 |
PURPOSE: A prestressed precast concrete beam having an efficient prestressing anchor structure is provided to improve structural safety and construction performance by utilizing the advantages of a PS structure and smoothly implement a prestressing work. CONSTITUTION: A prestressed precast concrete beam having an efficient prestressing anchor structure comprises a body(11), anchor blocks(12), a sheath pipe(13), multiple secondary tendons(14), and an anchoring device(15). The body has a rectangular cross-section in which the height is shorter and the width is wider than an existing beam and the prestress is introduced by a first primary tendon(112). The anchor blocks is projected from both ends of the body. The sheath pipe is longitudinally arranged in the body to insert the secondary tendons. The secondary tendons are inserted inside the sheath pipe after a temporary construction. The anchoring device anchors the multiple secondary tendons and comprises an anchor plate, a trumpet, a head, a wedge, and a spiral or circular reinforcing bar.
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