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Interpretation of Reduction Factor by Creep Deformation Test of Geogrids  

Jeon Han Yong (Department of Textile Engineering, Inha University)
Mok Mun Sung (Department of Textile Engineering, Inha University)
Yoo Chungsik (Department of Civil and Environmental Engineering, Sungkyunkwan University)
Kim Eui Hwa (R & D Planning Coordination, Korea Institute for Knit Industry)
Publication Information
Textile Science and Engineering / v.42, no.3, 2005 , pp. 194-199 More about this Journal
Abstract
Reduction factor by creep deformation test of geogrids was interpreted to determine the long-term design strength. For this, limit creep strain of geogrids was analyzed to consider the material strain property. Limit creep strain of geogrids in this study was not over $10\%$ during 10000 hours. Sherby-Dorn plots were applied to compare the real limit strain criteria (GRI Test Method GG-4). Through Sherby-Dorn plots of creep deformation behaviors of geogrids. It was seen that the limit creep strain was $11\%$. This value is higher than the existing criteria of $10\%$. From this limit creep strain 11$\%$, reduction factor from the creep deformation test was 1.45 during 10,000 hours for geogrids. Finally, creep reduction factors of $10\%\;and\;11\%$ limit creep strains were compared and analyzed to interpretate the difference of reduction factor $0.06\~0.14.$
Keywords
reduction factor; geogrids; long-term design strength; limit creep strain; Sherby-Dorm plots; GRI Test Method GG-4;
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