Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
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Analysis of Reservoir Seismic Response Acceleration Amplification Characteristics Using Seismic Measurements Data

지진계측 기록을 이용한 저수지 지진응답가속도 증폭 특성 분석

  • Lee, Moojae (Dept. of Regional Infrastructure Engineering, Kangwon National University) ;
  • Kim, Yongseong (Dept. of Regional Infrastructure Engineering, Kangwon National University) ;
  • Tamang, Bibek (Dept. of Regional Infrastructure Engineering, Kangwon National University) ;
  • Lee, Seungjoo (Dept. of Regional Infrastructure Engineering, Kangwon National University) ;
  • Lee, Gilyong (Dept. of Regional Infrastructure Engineering, Kangwon National University) ;
  • Heo, Joon (Rural Research Institute, Korea Rural Community Corporation)
  • Received : 2020.11.09
  • Accepted : 2020.12.07
  • Published : 2020.12.30
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Abstract

In this study, the model test of a reservoir was performed through a dynamic analysis method by using the data obtained from seismometers. Besides, we analyzed the behavior of the seismic acceleration amplification by reservoir height. To test the model, the data measured by the seismometers were applied at the foundation of the reservoir as input data, and the results from the analysis were compared with the data measured at the dam crest. The analysis results manifest that the peak values and the trend of the seismic wave obtained from the numerical analysis are in good agreement with the measured data. Also, the acceleration amplification ratio was proportional to the reservoir height and the magnitude of the earthquake. Through this study, the dynamic analysis method, which is based on the cyclic elastoplastic constitutive equation, can be considered as an appropriate technique to analyse the seismic behavior by the application of the data obtained from the seismometers installed in the reservoir. Also, the applicability of the seismometers can be enhanced through this technique in the future.

본 연구에서는 지진가속도 계측기의 계측 데이터를 사용하여 저수지의 동적해석방법에 대한 모형 검정 및 저수지 높이에 따른 지진가속도 증폭 특성을 분석하였다. 모형을 검정하기 위해 댐 기초의 계측 데이터를 입력 데이터로 사용하였고 해석 결과를 댐 상부의 계측 데이터와 비교한 결과 수치해석을 이용해 출력된 지진파와 계측 지진파의 최댓값과 그 파형이 비슷하게 나타났고 지진가속도 증폭 특성의 경우 지진가속도 증폭비는 저수지의 높이와 지진의 크기에 비례하는 것으로 나타났다. 본 연구를 통해 저수지에 설치된 가속도계에서 얻은 계측 데이터를 활용하여 반복 탄소성 구성식을 이용한 동적해석방법은 지진파 특성 분석이 적절하게 수행될 수 있는 기법임을 확인하였고 향후 이러한 기법을 적용해 저수지의 지진가속도 계측기의 활용도를 제고할 수 있을 것으로 판단된다.

Keywords

Acknowledgement

This work was supported by Korea institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry (IPET) through Agricultural Foundation and Disaster Response Technology Development Program, funded by ministry of Agriculture, Food and Rural Affairs (MAFRA) (320002-01).

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