한국지반공학회논문집 (Journal of the Korean Geotechnical Society)

  • 제28권5호
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  • Pages.95-107
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  • 2012
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  • 1229-2427(pISSN)
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  • 2288-646X(eISSN)
한국지반공학회 (Korean Geotechnical Society)
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응력 기반 간극수압 모델 개발

Development of Stress Based on Pore Pressure Model

  • 박두희 (한양대학교 건설환경공학부) ;
  • 안재광 (한양대학교 건설환경공학부) ;
  • 김진만 (부산대학교 사회환경시스템공학부)
  • Park, Du-Hee (Dept. of Civil and Environmental Engineering., Hanyang Univ.) ;
  • Ahn, Jae-Kwang (Dept. of Civil and Environmental Engineering., Hanyang Univ.) ;
  • Kim, Jin-Man (Dept. of Civil Engineering., Pusan National Univ.)
  • 투고 : 2012.03.08
  • 심사 : 2012.05.04
  • 발행 : 2012.05.31
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초록

반복하중에 의하여 유발되는 과잉간극수압 예측의 중요성은 잘 알려져 있지만 이를 고려한 유효응력해석은 수치 모델 변수 산정의 어려움으로 인하여 극히 드물게 수행되고 있다. 본 논문에서는 반복하중에 의하여 흙에 발생하는 과잉간극수압을 예측하는 새로운 응력 기반 수치적 모델을 개발하였다. 본 모델의 가장 큰 장점은 진동삼축시험으로 부터 획득된 CSR-N 곡선만으로 모든 변수를 결정할 수 있다는 점이다. 이 모델의 추가적인 장점은 모든 하중형태에 대해서 적용될 수 있으므로 시간영역 유효응력해석 프로그램에 적용될 수 있다는 점이다. 개발된 모델의 정확성은 문헌에 제시된 시험결과와 국내에서 수행된 시험결과와의 비교를 통하여 검증되었다. 나아가 기존의 응력기반 모형과의 성능 비교 결과 제안된 모델은 정확성과 사용 편리성이 모두 우수한 것으로 나타났다.

Even though the importance of predicting build-up of pore pressure under cyclic loading is recognized, effective stress analysis is rarely performed due to difficulties in selecting the parameters for the pore pressure model. In this paper, a new stress based numerical model for predicting pore pressure under cyclic loading is developed. The main strength of the model is that it is easy-to-use, requiring only the CSR-N curve in selecting the parameters. Another advantage of the model is that it can be used for any loading pattern and therefore can be implemented in an effective stress time-domain dynamic analysis code. The accuracy of the model is validated through its comparisons with measurements in literature and laboratory test data collected in Korea. Further comparisons with another stress based pore pressure model highlighted the superiority of the proposed model.

키워드

참고문헌

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