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Invention Patent
JP2021181682A 床部の振動低減機構 审中-公开

床部の振動低減機構
Abstract:
【課題】片持ち梁のスパンに関わらず、経済的に回転慣性質量ダンパを設置することができる床部の振動低減機構を提供する。 【解決手段】片持ち梁2の基端部22を支持する支持梁61(支持部)と、一端が支持梁61に支持され、支持梁61を介して片持ち梁2と接合される小梁7(両端支持梁)と、床スラブ3と支持梁61との間に設けられ床スラブ3および支持梁61それぞれと接続される回転慣性質量ダンパ8と、が設けられ、片持ち梁2の振動が支持梁61を介して小梁7に伝達され、片持ち梁2と小梁7とが支持梁61を支点として同期して振動可能とされ、床スラブ3と支持梁61とは、相対振動可能で、床スラブ3と支持梁61との相対振動により回転慣性質量ダンパ8が作動するように構成され、回転慣性質量ダンパ8は、床スラブ3における片持ち梁2の先端部21よりも支持梁61側の位置で、かつ片持ち梁2と鉛直方向に重ならない位置に接続されている。 【選択図】図1
Abstract(English):

To provide a floor vibration reduction mechanism which can economically install a rotary inertial mass damper regardless of a span of a cantilever.SOLUTION: A support beam 61 (support portion) which supports a base end portion 22 of a cantilever beam 2, a small beam 7 (end supported beam) which is supported by the support beam 61 at one end and is joined to the cantilever beam 2 via the support beam 61, and a rotary inertial mass damper 8 provided between the floor slab 3 and the support beam 61 and connected to each of the floor slab 3 and the support beam 61 are provided. Vibration of the cantilever 2 is transmitted to the small beam 7 via the support beam 61, and the cantilever 2 and the beam 7 can vibrate synchronously with the support beam 61 as a fulcrum, and the floor slab 3 and the support beam 61 can vibrate relative to each other. The rotary inertial mass damper 8 is configured to operate by the relative vibration between the slab 3 and the support beam 61, and the rotary inertial mass damper 8 is connected at a position on the support beam 61 side of a tip portion 21 of the cantilever 2 in the floor slab 3, and at a position which does not overlap the cantilever 2 in the vertical direction.SELECTED DRAWING: Figure 1

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