日本機械学会論文集
Online ISSN : 2187-9761
ISSN-L : 2187-9761
機械力学・計測制御分野特集号2020
加振実験に基づくロッキング振動特性と非線形性を考慮したその数値解析
宮田 昌明栗田 勝実青木 繁
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2020 年 86 巻 888 号 p. 19-00440

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It is important to understand characteristics of rocking vibration related to overturning small structures inside buildings. In order to understand the overturning of the structure due to rocking vibration by numerical analysis, numerical analysis considering energy loss in a collision and duration of collision is performed by using a quadrilateral hysteresis loop characteristics in which repulsive force is a function of speed. In case that the restitution coefficient is constant and sine wave is used as an input wave, it is good agreement between experiment and numerical analysis response waveforms of rocking vibration in stationary process. However, it is not good agreement in nonstationary process. And it is not good agreement between experiment and numerical analysis response waveforms of rocking vibration using seismic ground motion as an input wave. On the other hand, in case that the restitution coefficient is considering energy loss in a collision and duration of collision, sine wave is used as an input wave, it is good agreement between experiment and numerical analysis response waveforms of rocking vibration in nonstationary process. Also it is good agreement using seismic ground motion as an input wave. From these results, numerical analysis for rocking vibration considering energy loss in a collision and duration of collision is effective using a quadrilateral hysteresis loop characteristics in which repulsive force is a function of speed. And it is effective for this model to understand overturning behavior of small structures in earthquake.

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