スウェイ•ロッキング機構を有する摩擦ダンパー付きパッシブ制振構造の 振動台実験に基づく最適ダンパー特性評価

摘要

In the present study, to elucidate the optimal damper characteristics of passive vibration control structures, shaking table tests were conducted using a specimen consisting of a vibration control structure with a sway-rocking mechanism under the superstructure. A simple motion damper, which allows the slip force to be easily set to various magnitudes, was installed into the superstructure to investigate the optimal damper characteristics. The obtained results showed that the optimal damper slip force, which minimizes the peak response, varied depending on the input level of the earthquakes and the sway-rocking condition, i.e., fixed base or under sway-rocking motion. In addition, reversal of the peak response curves between fixed base and sway-rocking motion was observed.%パッシブ制振構造は、建築物の地震による応答と損傷を低減する有効な手法である1),2)。パッシブ制振構造には、地震時の応答制御効果を最良化する最適ダンパー値（例えば履歴ダンバ一では最適なダンパー降伏耐カ）が存在し3),4)、その特性を把握することは耐震工学上有益である。