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

Cho Sam-Deok (Geotechnical Eng. Research Dept., KICT)
Lee Kwng-Wu (Geotechnical Eng. Research Dept., KICT)
Oh Se-Yong (Geotechnical Eng. Research Dept., KICT)
Lee Do-Hee (Director, DAEWOO E&C)
Publication Information
Journal of the Korean Geotechnical Society / v.21, no.5, 2005 , pp. 153-161 More about this Journal
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 $RF_{CR}$.
Keywords
Creep deformation; Geogrid; Installation damage; Wide width tensile test;
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