화학적 영향을 고려한 토목섬유-흙 접촉면의 동적 전단거동

• 영문명: Cyclic Shear Behaviors of Geosynthetic-soil Interface considering Chemical Effects
• 발행기관: 한국방재학회
• 저자명: 곽창원(Kwak Chang won)
• 간행물 정보: 『3. 한국방재학회 학술대회논문집』2015년, 111~111쪽, 전체 1쪽
• 주제분류: 공학 > 기타공학
• 파일형태: PDF
• 발행일자: 2015.02.25

영문 초록

Geosynthetics have been widely applied in waste landfill site for reinforcement, filtration, drainage, protection, and separation. Geosynthetics inevitably contact soil particle directly, composing a geosynthetic-soil interface corresponding to external conditions. In this study, particularly, the effects of chemical aggressors on the geosynthetic-soil interface were investigated under cyclic shear loading, based on the experimental approach. The Multi-purpose Interface Apparatus (M-PIA) was newly manufactured and modified for better performance. The Disturbed State Concept (DSC) and disturbance function were introduced and employed to estimate shear stress degradation based on the experimental study, quantitatively. New disturbance functions and parameters were mathematically evaluated. Microscopic observation by Focused Ion Beam (FIB) was utilized to clarify the reason of the variation of interface damage subjected to the chemical conditions. As a result, the variation of the cyclic shear behavior at the geosynthetic-soil interface was due to the different damage patterns of the soil particle surface. Furthermore, the numerical back-prediction based on the DSC parametric study of the cyclic shear stress-strain behavior was performed and verified the accuracy and applicability of the DSC parameters. Consequently, a general methodology to estimate the cyclic shear stress degradation of geosynthetic-soil interface considering chemical effects has been established and verified.

키워드

Geosynthetic-Soil interface Chemical conditions Multi-Purpose Interface Apparatus (M-PIA) Cyclic simple shear tests Disturbed State Concept (DSC) Focused Ion Beam (FIB) Numerical back-prediction