Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Response Dominant Frequency Analysis for Scour Safety Evaluation of Railroad Piers

철도 교각의 세굴 안정성 평가를 위한 응답 지배주파수 분석

  • Jung, Hyun-Seok (Advanced Infrastructure Research Team of Korea Railroad Research Institute) ;
  • Lee, Myungjae (Railroad Structure Research Team of Korea Railroad Research Institute) ;
  • Yoo, Mintaek (Railroad Structure Research Team of Korea Railroad Research Institute) ;
  • Lee, Il-Wha (Advanced Infrastructure Research Team of Korea Railroad Research Institute)
  • 정현석 (한국철도기술연구원 첨단인프라연구팀) ;
  • 이명재 (한국철도기술연구원 철도구조연구팀) ;
  • 유민택 (한국철도기술연구원 철도구조연구팀) ;
  • 이일화 (한국철도기술연구원 첨단인프라연구팀)
  • Received : 2020.09.21
  • Accepted : 2020.10.29
  • Published : 2020.11.30
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Abstract

In order to evaluate the stability of the geo-structure of railway bridge, the response dominant frequency was analyzed based on a series of impact vibration load test results. The specifications of the experiment piers were obtained by referring to the completion design data, and when data was missing, a field study was conducted. The impact vibrations test according to the scouring progress was carried out at one pier scheduled to be abandoned, and it was confirmed that the response dominant frequency can be utilized as an evaluation index for scour. In addition, the response dominant frequency was measured through an impact load test at 46 piers in 5 bridges in operation, and the scour safety of the bridge was evaluated by comparing it with the japanese proposal formula.

철도 교량 하부구조의 안정성 평가를 위해 일련의 충격진동시험을 수행하고, 계측된 가속도 시간이력 데이터를 분석하여 응답 지배주파수를 산정하였다. 실험 교각의 제원은 준공설계 자료를 참고하였으며 자료가 소실된 경우에는 현장 조사를 시행하여 확보하였다. 1개의 폐선 예정 교각에서 세굴 진행에 따른 충격진동시험을 수행하고, 이를 바탕으로 교각의 응답 지배주파수가 교각의 세굴 여부에 대한 평가 지표로 적용 가능한 것을 확인하였다. 또한, 실제 운영 중인 5개 교량 46개 교각에서 충격하중시험을 통해 응답 지배주파수를 산정하였으며, 이를 일본 기준식과 비교하여 교량의 세굴 안정성을 평가하였다.

Keywords

References

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