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Damping Ratio of RC Squat Wall with Limited Damage under High-Frequency Earthquake
| 题名： | Damping Ratio of RC Squat Wall with Limited Damage under High-Frequency Earthquake |
| 正文语种： | eng |
| 作者： | Yang, Hyeon-Keun;Park, Hong-Gun |
| 作者单位： | Seoul Natl Univ Dept Architecture & Architectural Engn 1 Gwanak Ro Seoul 08826 South Korea;Seoul Natl Univ Dept Architecture & Architectural Engn 1 Gwanak Ro Seoul 08826 South Korea |
| 关键词： | High-frequency earthquake;Shaking table test;RC squat wall;Damping ratio |
| 摘要： | In regions experiencing high-frequency earthquakes, it is necessary to reevaluate the seismic performance of nuclear power plant buildings. In the evaluation of equipment, as well as the structure, the damping ratio of a structure is important. In the present study, to evaluate the damping ratio of walls with limited damage, a shaking table test was conducted for reinforced concrete squat walls with a low aspect ratio. The test variables were the natural frequency of the walls and the type of earthquake (i.e., earthquakes with and without high -frequency contents). The result showed that for a peak ground acceleration of 0.1g, the damping ratio of the walls was 3.5% for the mean and 0.27 for the standard deviation, while for high-frequency earthquakes, the damping ratio was 14.3% lower (3.0% for the mean). In particular, as the dynamic response amplification increased, the damping ratio decreased; when the dynamic amplification was greater than 1.5, the average damping ratio of the walls was 2.4%. (c) 2020 American Society of Civil Engineers. |
| 出版年： | 2021 |
| 期刊名称： | Journal of Structural Engineering |
| 卷： | 147 |
| 期： | 1 |
| 页码： | 04020295.1-04020295.15 |
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