Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Evaluation of Analysis Technique for Piles Driven by Vibration through Parametric Study

매개변수연구를 통한 진동타입말뚝 해석기법 평가

  • Lee, Seung-Hyun (Department of Civil Engineering, Sunmoon University) ;
  • Lee, Su-Hyung (Korea Railroad Research Institute, Metropolitan Transportation Research Center)
  • 이승현 (선문대학교 토목공학과) ;
  • 이수형 (한국철도기술연구원 광역도시교통연구본부)
  • Received : 2013.10.07
  • Accepted : 2014.03.06
  • Published : 2014.03.31
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Abstract

Technique for analyzing a pile installed by vibrohammer was developed and parametric studies were executed in order to evaluate reliability of the developed technique. Comparing the accelerations obtained from parametric studies of varying eccentric moment and frequency, it can be seen that magnitude of maximum acceleration was proportional to the eccentric moment and square of frequency. It can also be seen that amplitude of displacement was roughly proportional to the eccentric moment but has nothing to do with the frequency. It can be said that all of the analysis results reflect characteristics of behavior of a pile in case of free vibration. Comparing the dynamic load transfer curves, maximum dynamic unit toe resistance was constant regardless of the eccentric moment and the frequency and it can be seen that dynamic unit skin friction was affected by the eccentric moment not by frequency. Comparing all of the analysis results, it can be said that the developed technique is reliable.

진동해머에 의해 시공되는 말뚝의 해석기법을 개발하고 매개변수연구를 수행하여 개발된 해석기법의 신뢰성을 평가해보았다. 편심모멘트와 진동수에 따른 매개변수해석을 통해 구한 가속도를 비교분석해 본 결과 최대가속도의 크기는 대략적으로 편심모멘트에 비례하였으며 진동수의 제곱에 비례하였다. 또한 변위진폭은 편심모멘트에 비례하는 결과를 나타내었고 진동수에는 거의 영향을 받지 않았는데 이러한 경향은 공운전시의 거동특성과 유사하다. 매개변수해석을 통해 구한 동적 하중전이곡선을 비교해 볼 때 편심모멘트와 진동수의 크기에 관계없이 최대 동적단위선단저항력의 크기는 동일하였으며 최대 동적단위주면마찰력의 크기는 편심모멘트에 영향을 받으나 진동수와는 무관하였다. 매개변수해석결과를 종합적으로 비교분석해 볼 때 개발된 해석기법은 합리적인 해석결과를 보인다고 볼 수 있다.

Keywords

References

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