Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
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Development of Strain-softening Modeling for Interfaces between Geosynthetics

토목섬유 interface의 변형율 연화 모델 개발

  • Seo, Min-Woo (School of Civil, Urban & Geosystem Engineering, Seoul National University) ;
  • Park, Jun-Boum (School of Civil, Urban & Geosystem Engineering, Seoul National University) ;
  • Park, Inn-Joon (Dept. of Civil Engineering, Hanseo University) ;
  • Cho, Nam-Jun (Dept. of Civi and Environmental Engineering, Kookmin University)
  • Published : 2003.03.30
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Abstract

Strain-softening model is developed to characterize the interface behavior of geomembrane with geotextile and geosynthetic clay liner(GCL). The model proposed in this research is calibrated by using data from direct shear tests conducted on smooth and textured geomembrane. The research is divided into two regions, pre-peak and post-peak, to take into account of strain-softening effect. Although slight difference between measured and back calculated data is observed under high normal stress, good agreements, in general, are found from back calculations. Especially, good consistency is observed in the case of low normal stress. Based on the results, it can be concluded that the proposed model can be a reasonable constitutive law to figure out the behavior of strain-softening between interfaces of geomembrane. In addition, DSC(Disturbed State Concept) model is also presented for further application in geosynthetic interfaces.

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