Stress-Strain Properties of Geosynthetics by Confined Extension Tests

구속신장시험에 의한 토목섬유의 인장력-변형률거동 특성

  • Published : 2002.06.30


In this study. stress-strain relationships were investigated by performing the confined extension tests for seven types of geosynthetics such as geotextiles, composite geosynthetics and geogrids. A comparison was made between unconfined and confined moduli for each geosynthetic material to quantify the soil confinement effect on stress-strain properties. A comparison was also made between the increase of moduli at the same strain level with the types of the geosynthetics to demonstrate the different stress-strain responses. Based on the result of the extension tests, the higher the confining stress, the larger the secant modulus of geosynthetics. The secant modulus at 5% strain is twice as much as that of 10% strain, especially there is a noticeable increasing of secant modulus for the two nonwoven geotextiles.


geosynthetics;confined extension test;wide-width tensile tests;stress-strain relationship;secant modulus


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