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Çѱ¹Áö¹Ý°øÇÐȸ / v.19, no.5, 2003³â, pp.291-299
¿Âµµ ¹× ±¸¼ÓÀÀ·ÂÀ» °í·ÁÇÑ Åä¸ñ¼¶À¯ÀÇ Å©¸®ÇÁ°Åµ¿¿¡ °üÇÑ ¿¬±¸
( A Study on Creep Behavior of Geosynthetics Considering Effect of Temperature and Confining Stress )
¹æÀ±°æ;±èÈ«ÅÃ; ´ë¿ø°úÇдëÇÐ Åä¸ñ°ú;È«ÀÍ´ëÇб³ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â, Åä¸ñ¼¶À¯ÀÇ Å©¸®ÇÁ½ÃÇè½Ã ¿Âµµ ¹× Åä¸ñ¼¶À¯¿¡ °¡ÇØÁö´Â ±¸¼ÓÀÀ·ÂÀ» Á¦¾îÇÒ ¼ö ÀÖµµ·Ï °í¾ÈµÈ ¿ÂµµÁ¦¾î ±¸¼ÓÅ©¸®ÇÁ½ÃÇè(Temperature Dependent Confined Creep Test)À» ¼öÇàÇÏ¿´´Ù. ½ÃÇè°á°ú¸¦ Åä´ë·Î, ½ÃÇè¿Âµµ ¹× ±¸¼ÓÀÀ·ÂÀÇ Å©±â°¡ Åä¸ñ¼¶À¯ÀÇ Å©¸®ÇÁƯ¼º¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» Á¤·®ÀûÀ¸·Î ºÐ¼®ÇÏ¿´À¸¸ç, Àå±âÀûÀÎ Å©¸®ÇÁº¯À§¸¦ ¿¹ÃøÇϱâ À§ÇÏ¿© ½Ã°£-¿Âµµ Áßø¿ø¸®¸¦ ÀÌ¿ëÇÑ ÇÕ¼º°î¼±À» ÀÛµµÇÏ¿©, 1$ imes$$10^7$min.(Geomembrane D)¡­1$ imes$$10^{10}$min.(Geogrid T)±îÁöÀÇ Å©¸®ÇÁº¯À§¸¦ ¿¹ÃøÇÏ¿´´Ù. º» ÇÕ¼º°î¼±¿¡ ÀÇÇØ, Åä¸ñ¼¶À¯¿¡ °¡ÇØÁö´Â ±¸¼ÓÇÏÁß¿¡ µû¸¥ Åä¸ñ¼¶À¯ÀÇ À̵¿°è¼ö(shift factor)¸¦ µµÃâÇÏ¿´´Ù. ¿ÂµµÁ¦¾î ±¸¼ÓÅ©¸®ÇÁ½ÃÇèÀº ½ÃÆ®Çü Áö¿À±×¸®µå¿Í Áö¿À¸âºê·¹ÀÎÀ» ´ë»óÀ¸·Î ÇÏ¿´À¸¸ç, ½ÃÇè¿Âµµ´Â 5¡­4$0^{circ}C$ÀÇ ¹üÀ§·Î, ±¸¼ÓÇÏÁßÀÇ Å©±â´Â 0¡­9t/$cm^2$ÀÇ ¹üÀ§·Î ÇÏ¿´´Ù.
The effect of temperature and soil confining stress on geosyntheic creep behaviour was studied by performing the temperature dependent confined creep tests for HDPE geogrid and geomembrane specimen. The visco-elastic creep coefficients of the geosynthetics were evaluated by the test results and it was proposed that the simple expressions for the instantaneous and limit creep strain of geosynthetics was considered as a function of temperature and confining stress on geosynthetics. Based on the time-temperature superposition principle, a master curve has been drawn for extrapolating tensile creep strains to longer time intervals(1$ imes$10 $^7$min.¡­1$ imes$10$^{10}$min.). By using this master curves, the shift factors which can be used in establishing master curve considering confining stress on geosynthetics were carried out. Each tests was performed during 8,000¡­12,000 min., with temperature ranging between 5$^{circ}C$ and 4$0^{circ}C$ and with confining stress ranging between 0 t/$m^2$ and 9 t/$m^2$.
 
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Creep;Geosynthetics;Master curve;Shift factor;Time-temperature superposition;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.19, no.5, 2003³â, pp.291-299
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200311921979312)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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