| 摘要 |
PROBLEM TO BE SOLVED: To provide a damper for base isolation having excellent durability and used in a base isolation device to protect a building from earthquake and, in particular, a damper for base isolation used when reducing earthquake energy transmitted to the building when earthquake occurs using it together with an isolator for base isolation to prevent a damper main body from hanging down even when repeating deformation when earthquake occurs. SOLUTION: In this damper for base isolation formed by curving the damper main body made of metal such as lead into U-shape, a ratio of width W to thickness t (W/t) of the damper main body 1 is set to be smaller than 1.0. In the damper for base isolation, thickness t1 of both end parts of the U-shaped damper main body 1 is set to be 1.2 to 1.5 times other thickness t. COPYRIGHT: (C)2005,JPO&NCIPI
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