| 摘要 |
PROBLEM TO BE SOLVED: To solve a conventional problem with a reinforcement structure between continuous holes on a beam that has restricted the design, where the distance between the center of continuous holes must be thrice or larger than the hole diameter.SOLUTION: When a plurality of holes that pierces through a beam in the lateral direction is drilled at an interval in the longitudinal direction of the beam, the distance s between the center of adjacent holes is 2&phgr;≤s<3&phgr; when the radius &phgr; of the holes is the same, and &phgr;1+&phgr;2≤s<1.5×(&phgr;1+&phgr;2)when the holes have different radii &phgr;1, &phgr;2, and a reinforcement structure 1 between the continuous holes of the beam has X-shaped reinforcing bars installed between the holes. |
