한국지반공학회지:지반 (Geotechnical Engineering)

한국지반공학회 (Korean Geotechnical Society)
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이방성 항복경계면 이론을 이용한 점성토정회원, 서울대학교 공과대학 토목공학과 조교수의 구성모델

A Constitutive Model using Anisotropic Bounding Surface Theory for Cohesive Soils

  • 김범상 (정회원, 서울대학교 공과대학 토목공학과) ;
  • 정충기 (정회원, 서울대학교 공과대학 토목공학과)
  • 발행 : 1996.04.01
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초록

본 연구에서는 이방성 항복경계면 이론을 토대로 하여 자연상태의 점성토가 갖는 이방적 특성과 소성적 거동을 고려한 구성모델을 개발하였다. 이 모델은 개선된 이방항복경계면 함수와 새로운 소성포텐셜 함수를 이용한 비관련 유동법칙, 이방경화법칙과 항복면 내의 소성 거동 예측을 위한 새로운 투영법칙 등의 개념을 통하여 개발하였다. 개발된 모델의 검증을 위하여 불교란 점성토에 대한 Ko 압밀과 삼축전단 시험결과들을 비교분석한 결과 본 모델은 점성토의 거동을 잘 예측하는 것으로 나타났다.

In this study, a constitutive model which can describe the anisotropic and plastic behaviors of natural cohesive soils, was developed based on anisotropic bounding surface theory. The model was fomulated by the concepts of the improved anisotropic bounding surface function, nonassociated flow rule with new plastic potential function, anisotropic hardening rule, and new mapping rule governing the plastic behavior inside bounding sutraface. Comparing with the results of Ku consolidation and triaxial shearing tests, the predictions by the proposed model agree quite well with real soil responses.

키워드

참고문헌

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  2. International Journal of Numerical and Analitical Methods in Geomechanics v.10 A plasticity model for the mechanical behavior of anisotropically consolidated clay Banerjee P.K.;Yousif N.B.
  3. Proceedings of the Second International Conference on Constitutive Laws for Engineering Materials : Theory and Appications v.1 A generalized elasto plastic model for anisotropically consolidated calys Benerjee P.K.;Kumbhojkar A.;Yousif N.B.;Desai C.S.(et al.)(eds.)
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