| 摘要 |
PROBLEM TO BE SOLVED: To provide a connection structure of PC small beams to a large beam frame capable of preventing the large beam frame from being slightly rotated even when only one side PC small beam is connected and eliminating a large- scale welding operation to the large beam frame. SOLUTION: In this structure for connection PC small beams 3R and 3L to a large beam frame 1 comprising a wide-flange shape or I section steel, bolts shanks 2R and 2L are fixed to the upper surface of the upper flange 1a of the large beam frame 1 near the lateral symmetrical axis (centerline of web 1b), connection plates 4R and 4L (connection hardware) having bolt shank insert holes 4f provided at the tip thereof are extended from the end parts of the PC small beams 3R and 3L, and the bolts shanks 2R and 2L are inserted into the bolt shank insert holes 4f and tightened with nuts 5 so as to connect the PC small beams 3R and 3L to the large beam frame 1. Round bar stiffeners 6 and 6 (web reinforcement members) having an upper end fixed to the lower surface of the upper flange 1a and having a lower end fixed to the upper surface of a lower flange 1c are installed at the lower side of the bolt shanks 2R and 2L of the flange beam frame 1.
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