Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
권호 표지

A Prediction of Undrained Shear Behavior of the Remolded Weathered Mudstone Soil Using the Constitutive Model

구성모델을 이용한 재성형 이암풍화토의 비배수 전단거동 예측

  • 이상웅 ((주)연엔지니어링 지반공학부) ;
  • 추인식 ((주)두호엔지니어링) ;
  • 김영수 (경북대학교 공과대학 토목공학과) ;
  • 김기영 (한국수자원공사 댐안전연구소)
  • Published : 2005.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

This study proposed a new yield function considering the spacing ratio of the critical state to predict the undrained shear behavior of anisotropic field ground. We have suggested a nonassociated constitutive model that used a newly modified plastic potential function in order to apply the yield function of the modified Cam-Clay model to the anisotropic consolidation. In this paper, we predicted undrained shear behavior of the remolded weathered mudstone soils in Phohang isotorpically and anisotropically consolidated using the suggested model. To evaluate the reliability of proposed model, we predictied undrained shear behavior of Bankok Clay isotropically, nomally consolidated and Drammen Clay Ko consolidated. The predicted results are consistent with the observed behavior.

본 연구에서는 이방성을 가지는 현장지반의 비배수 전단거동을 예측하기 위해 한계상태 간격비를 고려한 새로운 항복함수식을 제안하였다. 또한 수정 Cam-clay모델의 항복면 식을 이방압밀 조건에 적용할 수 있도록 수정한 새로운 소성포텐셜 함수를 적용하는 비관련 구성모델을 제안하였다. 제안모델을 적용하여 등방 및 이방압밀된 재성형 포항 이암풍화토의 비배수 전단거동을 예측하였으며, 신뢰성을 평가하기 위해 등방정규압밀된 Bankok clay 및 $K_0$ 압밀된 Drammen clay의 비배수 전단거동을 예측하였다. 그 결과 제안된 모델은 전반적인 거동을 잘 예측하는 것으로 나타났다.

Keywords

References

  1. 이승래, 오세붕, 권기철 (1992), '限界狀態間隔比를 利用한 構成모델', 한국지반공학회 논문집, Vol.8, No.2
  2. Adachi, T., and Oka, F. (1982), 'Constitutive Equations for Normally Consolidated Clay Based on Elasto-viscoplasticity', Soils and Foundations, Vol.22, SM4, pp.57-70
  3. Baladi, G.Y., and Rohani, B. (1979). 'Elasto-plastic Model for Saturated Sand', J. Geotech. Engrg., ASCE, Vol.105, GT4, pp.465-480
  4. Banerjee, P. K., and Yousif, N. B. (1987), 'Plasticity model for the mechanical behaviour of anisotropically consolidated clay' International Journal of Rock Mechanics and Mining Science & Geomechanics Abstracts, Vol.24, Issue 2
  5. Blight, G. E. (1963), 'The effect of non-uniform pore pressures on laboratory measurements of the shear strength of soils', Symposium on laboratory Shear Testing of Soils, pp.173-184
  6. Roscoe, K. H., Schofield, A.N. and Thurairajah A. (1963). 'Yielding of Clays in states wetter than critical.' Geotechnique, Vol.13, pp.211-240 https://doi.org/10.1680/geot.1963.13.3.211
  7. Roscoe, K. H. and Burland, J.B. (1968), 'On the generalized stress-strain behavior of 'wet' clay.' Engineering Plasticity, Heyman J & Leckie FA (ed.) Cambridge University Press, pp.535-609
  8. Sandler, I., DiMaggio, F., and Baladi, G.Y. (1976). 'Generalized Cap Model for Geological Materials', J. Geotech. Engrg., ASCE, Vol.102, GT7, pp.683-699
  9. Tavenas, F., and Lerouiel, S. (1977), 'The effects of stresses and time on the yielding of clays', Proceedings 9th ISSMFE Int. Conference, Tokyo, Vol.1, pp.319-326
  10. Wroth, C. P. (1984), 'The interpretation of in situ soil test', Geotechnique, Vol.34, No.4, pp.449-489 https://doi.org/10.1680/geot.1984.34.4.449
  11. Y. F. Dafalias (1986), 'An anisotropic critical state soil plasticity model', Mechanics Research Communi ations, Vol.13, Issue 6, pp.341-347 https://doi.org/10.1016/0093-6413(86)90047-9
  12. Y. F. Dafalias, Majid T. Manzari and Masaru Akaishi (2002), 'A simple anisotropic clay plasticity model', Mechanics Research Communications, Vol.29, Issue 4, pp.241-245 https://doi.org/10.1016/S0093-6413(02)00252-5