한계 크리프 변형률과 파단에 의한 지오그리드의 크리프 거동 평가

Cause of conventional design results from consideration of a safety factor in terms of civil engineering and uncertainty of long-term property of materials. Total reduction factor that is used when calculating allowable tensile strength of geogrids is made by multiplying the installation damage reduction factor, chemical degradation reduction factor, and creep reduction factor etc. In this paper, creep property of geogrids was measured by 3 methods such as conventional test, TTS, SIM and the results were compared. All the three methods showed similar behavior but it turned out that it had more strain of SIM method at higher temperature. Reduction factors for creep rupture and limited strain were similar by each method.