| 摘要 |
PROBLEM TO BE SOLVED: To provide a shear reinforcement structure of a beam, capable of miniaturizing the size and weight of the beam, and a pre-stressed concrete beam provided with the same.SOLUTION: In a pre-stressed concrete beam, a precast pretension member including a span central part of the beam and a precast RC member joined to at least one end of the pretension member are pressed and joined together by tendons disposed in an upper portion and a lower portion of each of the members. The upper portion of each of the pretension member and the RC member is provided with a plurality of upper side main bars embedded in a plurality of rows and in a plurality of stages; the lower portion of each of the pretension member and the RC member is provided with a plurality of lower side main bars embedded in a plurality of rows and in a plurality of stages; the periphery of the upper side main bars is provided with a plurality of upper side restriction bars arranged at equal intervals in an axial direction and worked to be annular to restrict the upper side main bars; and the periphery of the lower side main bars is provided with a plurality of lower side restriction bars arranged at equal intervals in an axial direction and worked to be annular to restrict the lower side main bars. |
