Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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Evaluation of Fundamental Frequency of Rockfill Dam using Microearthquake Records

미소지진 계측기록을 이용한 사력댐 고유진동수 산정

  • Ha, Ik-Soo (Dam Safety Research Center, Korea Institute of Water and Environment (KIWE), Kwater) ;
  • Lee, Jong-Wook (Dam Safety Research Center, Korea Institute of Water and Environment (KIWE), Kwater) ;
  • Oh, Byung-Hyun (Dam Safety Research Center, Korea Institute of Water and Environment (KIWE), Kwater)
  • 하익수 (한국수자원공사 수자원연구원 댐안전연구소) ;
  • 이종욱 (한국수자원공사 수자원연구원 댐안전연구소) ;
  • 오병현 (한국수자원공사 수자원연구원 댐안전연구소)
  • Published : 2008.03.28
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Abstract

The purpose of this study is to evaluate the fundamental frequency of the dam by the various methods using real microearthquake records which were measured on 'H' dam site and to compare each results. In this study, the fundamental frequency was evaluated by the frequency analysis of the microearthquake records which were measured on the dam crest, by the evaluation of acceleration amplification ratio between the foundation and the crest of dam, and by the evaluation of acceleration response spectrum ratio between the foundation and the crest of dam, respectively. Among these methods, it was found that the method by the evaluation of acceleration response spectrum ratio between the foundation and the crest of dam was the most effective method. But, if the simple engineering judgement can be considered, it was thought that the all three methods could reasonably evaluate the fundamental frequency of the dam.

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