To achieve an effective and proper structure capable of sufficiently securing earthquake resistance without deteriorating a merit of a pilotis-type building.
An additional rigid frame 2, which functions as an additional spring by behaving independently of a main structure 1 of the pilotis-type building, is installed on a floor surface on a pilotis story; an additional vibration system, which functions as a response reduction mechanism, is constituted by interposing a vibration control mechanism 3 with an inertia mass damper 4 between the additional rigid frame and the main structure; and its natural frequency f0 is synchronized with a primary natural frequency f1 of the main structure. Otherwise, the additional rigid frame is installed in such a manner as to behave integrally with the main structure; and the vibration control mechanism is interposed between the additional rigid frame and a floor surface on a pilotis story. In the vibration control mechanism, an additional damping element 5 is provided in parallel with the inertia mass damper 4. The horizontal rigidity (additional spring) k0 of the additional rigid frame is set in a range of 0.05-0.30 times as high as the story stiffness k1 of the pilotis story.
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| WO2009017162A1 | 2009-02-05 |
Tadashi Takahashi
Takashi Watanabe
Yoshifumi Saeki
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