Damping Ratio of RC Squat Wall with Limited Damage under High-Frequency Earthquake
Publication: Journal of Structural Engineering
Volume 147, Issue 1
Abstract
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 , 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%.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20201510100010).
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Published In
Journal of Structural Engineering
Volume 147 • Issue 1 • January 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Oct 15, 2019
Accepted: Aug 3, 2020
Published online: Oct 21, 2020
Published in print: Jan 1, 2021
Discussion open until: Mar 21, 2021
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