한국지반공학회논문집 (Journal of the Korean Geotechnical Society)

  • 제33권1호
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  • Pages.79-91
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  • 2017
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  • 1229-2427(pISSN)
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  • 2288-646X(eISSN)
한국지반공학회 (Korean Geotechnical Society)
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반복하중을 받는 해양실트질 모래의 상대밀도에 따른 응력기반 파괴기준

Relative Density and Stress-Dependent Failure Criteria of Marine Silty Sand Subjected to Cyclic Loading

  • 고민재 (부산대학교 사회환경시스템공학과) ;
  • 손수원 (부산대학교 사회환경시스템공학과) ;
  • 김진만 (부산대학교 사회환경시스템공학과 토목공학전공)
  • Ko, Min Jae (Dept. of Civil and Environmental Engrg., Pusan National Univ.) ;
  • Son, Su Won (Dept. of Civil and Environmental Engrg., Pusan National Univ.) ;
  • Kim, Jin Man (Dept. of Civil and Environmental Engrg., Pusan National Univ.)
  • 투고 : 2016.12.30
  • 심사 : 2017.01.19
  • 발행 : 2017.01.31
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초록

반복단순전단시험기를 이용하여 해양실트질 모래의 상대밀도 변화에 따른 비배수전단파괴 거동에 대해 평균전단응력과 반복전단응력이 미치는 영향을 평가하였다. 시험결과 반복전단 변형모드는 상대밀도가 달라지더라도 유사한 양상을 보였으며, 평균전단응력과 반복전단응력으로부터 큰 영향을 받았다. 파괴에 필요한 반복하중 횟수는 반복전단응력비, 상대밀도, 그리고 평균전단응력비의 순서로 좌우되는 것으로 나타났다. 본 논문에서는 조밀한 지반과 느슨한 지반에서 상대밀도 변화에 따른 응력기반 파괴경로의 변화를 2차원과 3차원으로 제시하였으며, 3차원 파괴선도는 조밀한 지반 조건에 대해서만 한정된 한계점을 보완하여 지반의 상대밀도에 따라 반복전단응력비, 평균전단응력비, 반복하중 횟수 등의 설계 조건을 결정 할 수 있는 아주 유용한 설계도구로 활용 가능하다.

An experimental study has been conducted by using the Cyclic Direct Simple Shear apparatus to evaluate the influence of average and cyclic shear stresses on the undrained shear failure behavior of marine silty sand considering various relative densities. The obtained results show that despite using different relative densities, similar trends were gained in the cyclic shear deformation. Moreover, the cyclic shear deformation is affected mainly by the average and cyclic shear stresses. The number of cyclic loads for failure is significantly affected by the cyclic shear stress ratio and relative density, and is less affected by the average shear stress ratio. The proposed three-dimensional stress-dependent failure contour can be used effectively to assess the soil shear strength considering various relative densities in the design of foundation used for offshore structures.

키워드

참고문헌

  1. Andersen, K.H., Kleven, A., and Heien, D. (1988), "Cyclic Soil Data for Design of Gravity Structures", Journal of Geotechnical Engineering, Vol.114, No.5, pp.517-539. https://doi.org/10.1061/(ASCE)0733-9410(1988)114:5(517)
  2. Andersen, K.H. and Berre, T. (1999), "Behaviour of a Dense Sand under Monotonic and Cyclic Loading", In Proceedings of the 12th ECSMGE, Geotechnical Engineering for Transportation Infrastructure, Amsterdam, the Netherlands, 7-10 June 1999, Vol.2, pp.667-676.
  3. Andersen, K.H. (2009), "Bearing Capacity under Cyclic Loading, Offshore, Along the Coast and on Land. The 21st Bjerrum Lecture presented in Oslo, 23 November 2007", NRC Research Press Web site .
  4. Budhu, M. and Britto, A. (1987), "Numerical Analysis of Soils in Simple Shear Devices", Soils and Foundation, Vol.27, No.2, pp.31-41 https://doi.org/10.3208/sandf1972.27.2_31
  5. De Alba, P., Seed, H.B., and Chan, C.K. (1976), "Sand Liquefaction in Large-scale Simple Shear Tests", J. Geotech. Engrg. Div., ASCE, Vol.102, pp.909-927.
  6. Ishihara, K. (1985), "Stability of Natural Deposits during Earthquakes", 11th Intl. Conf. on Soil Mechanics and Foundation Engineering, San Francisco, 1: 321-376.
  7. Kramer, S.L. (1996), Geotechnical Earthquake Engineering, Prentice-Hall Inc.
  8. Miura, S. and Toki, S. (1982), "A Sample Preparation Method and It Effect on Static and Cyclic Deformation-strength Properties of Sand", Soils and Foundation, Vol.22, pp.61-77. https://doi.org/10.3208/sandf1972.22.61
  9. Mulilus, J.P., Seed, H.B., Chan, C.K., Mitchell, J.K., and Arulanandan, K. (1977), "Effects of Sample Preparation on Sample Preparation", Journal of Geotechnical Engineering Division, ASCE 103 (GT2), pp.91-108.
  10. Nielsen, S.D., Shajarati, A., Sorenson, K.W., and Ibsen, L.B. (2012), "Behaviour of Dense Frederikshavn Sand during Cyclic Loading", DCE Technical Memorandum, No.15.
  11. Peck, R.B., Hanson, W.E., and Thornburn, T.H. (1974), Foundation Engineering 2nd Ed., New York: John Wiley and Sons.
  12. Randolph, M. and Gourvenec, S. (2011), "Offshore Geotechnical Engineering", Taylor and Francis, London.
  13. Ryu, T. G. (2016), Long-term dynamic behavior study of marine silty sand for offshore structure foundation design, Master's Thesis, Pusan National University.
  14. Ryu, T. G. and Kim, J. M. (2015), "Stress-Dependent Failure Criteria for Marine Silty Sand Subject to Cyclic Loading", Journal of the Korean Geotechnical Society, Vol.31, No.11, pp.15-23. https://doi.org/10.7843/KGS.2015.31.11.15
  15. Vaid, Y. P. and Negussey, D. (1988), "Preparation of Reconstituted Sand Specimens", ASTM STP pp.977.

피인용 문헌

  1. Probabilistic evaluation of the seismic stability of infinite submarine slopes integrating the enhanced Newmark method and random field vol.80, pp.3, 2021, https://doi.org/10.1007/s10064-020-02058-5