한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)

한국지반공학회 (Korean Geotechnical Society)
권호 표지

디지털 이미지 코릴레이션 기법으로 평가한 평면변형률 시험의 단부 구속 효과

Restrained Effect of End Plate on Plane Strain Test Evaluated by Digital Image Correlation Method

  • 장의룡 (서울대학교 건설환경공학부) ;
  • 추윤식 (서울대학교 건설환경공학부) ;
  • 이원택 (호남대학교 토목공학과) ;
  • 정충기 (서울대학교 건설환경공학부)
  • Jang, Eui-Ryong (School of Civil, Urban & Geosystem Engineering, Seoul National Univ.) ;
  • Choo, Yoon-Sik (School of Civil, Urban & Geosystem Engineering, Seoul National Univ.) ;
  • Lee, Won-Taeg (Dept. of Civil Engineering, Honam Univ.) ;
  • Chung, Choong-Ki (School of Civil, Urban & Geosystem Engineering, Seoul National Univ.)
  • 발행 : 2008.03.28
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초록

The plane strain test has been used widely in order to examine the stress-strain relation and failure behavior. Its advantages are more realistic simulation of deformation and failure behaviors of soils. Most plane strain tests have been carried out with restrained end plates due to difficulties in manufacturing the equipment with free end condition and also performing it. In this study, plane strain tests with/without bottom plate restraint were performed on Jumunjin-sand. The measurement of overall and local deformation was accomplished by digital image correlation technique as well as external LVDT. By applying digital image correlation method using two consecutive images captured through the transparent wall, local deformation behavior of various parts inside the specimen was estimated. From digital image analysis result, the restrained effect of end plate was examined about formation and development of shear band, and deformation mechanism of sand under plane strain condition.

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