Assessment of Combined Effect of Installation Damage and Creep Deformation of Geogrids

지오그리드의 시공 시 손상 및 크리프 변형의 복합효과 평가

  • 조삼덕 (한국건설기술연구원 지반연구부) ;
  • 이광우 (한국건설기술연구원 지반연구부) ;
  • 오세용 (한국건설기술연구원 지반연구부) ;
  • 이도희 (대우건설 경의선 전동차 사무소)
  • Published : 2005.07.01

Abstract

A series of installation damage tests and creep tests are performed to assess the combined effect of installation damage and creep deformation far the long-term design strength of geogrid reinforcement. Three types of geogrids are used to investigate the influence of the geogrid types. From the experimental results, it is shown that installation damage and creep deformation of geogrids significantly depends on the polymer types of the geogrids and the larger the installation damage, the more the combined effect of installation damage and creep deformation. In addition, The results of this study show that the tensile strength reduction factor, RF, considering the combined effect between installation damage and creep deformation is less than that calculated by the current design practice which calculates the long-term design strength of geogrids damaged during installation by multiplying two partial safety factors, $RF_{ID}$ and $RF_{CR}$.

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