| 摘要 |
PROBLEM TO BE SOLVED: To provide easy installation by fixing a part of steel rod to either a column or beam, arranging a steel rod projecting out from a part to the other of column or beam at a vacant place formed to the other and then filling lead or a visco-elasticity body therein. SOLUTION: Four energy absorbing structures 6 are respectively arranged up and down between each side face of columns 1 and 2 and between a downstairs beam 3 and an upstairs beam 4. In this case, one end portion 11 of the steel rod 13 is embedded in the column 1 and fixed, and the portion projecting out from one end portion 11 to the beam 4 is arranged with a gap to the beam 4 in a recess 12 formed in the beam 4. Also, the recess 12 is filled up with lead by surrounding the steel rod 13. Other energy absorbing structures 6 are also formed in the same manner. When vibration occurs in a horizontal direction H1 due to earthquake, the steel rod 13 has a displacement relative to a beam 4 inside the recess, a plastic flow occurs to the lead 14 by such displacement, and vibration energy is absorbed by the plastic flow of the lead 14. Thereby, even though the energy absorbing ability per one is reduced, a large energy absorbing ability can be realized as a whole.
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