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2016 Vol.32, Issue 3 Preview Page
Failure Mechanism Evaluation in Normally Consolidated Cohesive Soils by Plane Strain Test with Digital Image Analysis

평면변형률 시험에서 디지털 이미지 해석을 통한 정규압밀 점성토의 파괴거동 분석

Tae-Young Kwak1
,
Joon-Young Kim2
,
Choong-Ki Chung1*
곽 태영1
,
김 준영2
,
정 충기1*
1Member, Ph.D Student, Dept. of Civil & Environmental Engrg., Seoul National Univ.
2Member, Ph.D, Dept. of Civil & Environmental Engrg., Seoul National Univ.
Member, Prof., Dept. of Civil & Environmental Engrg., Seoul National Univ.
1서울대학교 건설환경공학부 박사과정
2서울대학교 건설환경공학부 박사
서울대학교 건설환경공학부 교수
*교신저자. *Corresponding Author. 
31 March 2016. pp. 49-60
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Abstract

Soil failure is initiated and preceded by forming and progressing of shear band, defined as the localization of deformation into thin zones of soil mass. To understand the failure mechanism of normally consolidated cohesive soil, the spatial distribution and evolution of deformation within the entire specimen need to be evaluated. In this study, vertical compression tests under plane strain condition were performed on reconstituted kaolinite specimens, while capturing digital images of the specimen at regular intervals during shearing. Overall stress-strain behavior from initial to post peak has been analyzed together with spatial distributions of deformations and shear band characteristics from digital images at 4 stages.

Keywords
Failure mechanism
Plane strain test
Digital image analysis
Strain distribution
Shear band characteristics

일반적으로 흙의 파괴는 전단 변형이 집중되는 영역인 전단면의 형성과 발달에 의해 발생한다. 정규압밀 점성토의 파괴거동을 확인하기 위해 시료 내부의 변형거동 분포에 대해 평가가 필요하다. 본 연구에선 재성형된 카올리나이트 시료에 대해 평면변형률 시험을 수행하였으며, 전단 과정에서 일정 변형률 간격에서 디지털 이미지 해석을 수행하였다. 시험 결과로 도출된 응력-변형률 결과를 통해 4개의 단계를 결정하여 시료의 변형거동과 전단면 특성을 평가하였다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 32
  • No :3
  • Pages :49-60
  • Received Date : 2016-02-26
  • Revised Date : 2016-03-09
  • Accepted Date : 2016-03-10
  • DOI :https://doi.org/10.7843/kgs.2016.32.3.49
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