| 摘要 |
PROBLEM TO BE SOLVED: To provide a friction damper having many friction planes with less numbers of plate materials and being applicable to a wide range of deformation while reducing the size and cost. SOLUTION: The friction damper 1 comprises a layered plate structure 5 consisting of friction plate materials 6 and sliding plate materials 7 and a high power bolt 8 for clamping the same. The high power bolt 8 is associated with plate washers 10A, 10B on the head side and on the nut side, respectively, and the sliding plate material 7 having a slot 7a, in which the high power bolt 8 is inserted, extending to the longitudinal direction of the plate material and being displaceable relative to the high power bolt 8 is arranged between the friction material 6 non-displaceable relative to the high power bolt 8 and each of the plate washer 10A on the head side of the high power bolt 8 and the plate washer 10B on the nut side. The many friction planes are kept with less numbers of friction plate materials and sliding plate materials to offer energy absorbing effect in earthquake in a range from a small scale to a large scale.
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