変位制御を行うソフトストーリーを有する制振建物の必要ダンパー量算定手法

AIJ

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  • DAMPER DESIGN OF A STRUCTURE WITH A DISPLACEMENT CONTROLLED SOFT-STORY

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Abstract

A soft-story in a multi-story building may cause excessive displacement, when it is subjected to a severe ground motion. To prevent this effect, on the soft story, a displacement controller device with a force-displacement relationship of hardening type hysteresis is proposed, in this study. Proposed displacement controller device (which is called a limiter in this study) restricts the movement of the soft-story and uniform inter-story displacement distribution can be obtained, with no significant change in acceleration and inertial force values. Moreover, an energy-based damper design method, which assumes a uniform inter-story displacement distribution, is proposed to determine the necessary viscous damping coefficient. The results show that, seismic displacement response of the multi story structure is effectively reduced under the target inter-story displacement value, with the use of viscous damping coefficient which is obtained by the proposed method.

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