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Çѱ¹Áö¹Ý°øÇÐȸ / v.20, no.6, 2004³â, pp.137-150
Aging È¿°ú¿¡ µû¸¥ ¸ð·¡ÀÇ ºñ¹è¼ö Á¤ÀûÀü´Ü°Åµ¿ Ư¼º
( Characteristics of Undrained Static Shear Behavior for Sand Due to Aging Effect )
±è¿µ¼ö;±è´ë¸¸; °æºÏ´ëÇб³ Åä¸ñ°øÇаú;°æºÏ´ëÇб³ Åä¸ñ°øÇаú;
 
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¸ð·¡ÀÇ aging Çö»óÀº Á¡¼ºÅä¿¡ ºñÇÏ¿© ¹«½ÃÇÒ Á¤µµ·Î ¸Å¿ì À۾Ƽ­ ÃÖ±Ù±îÁö ¿¬±¸µÇÁö ¾Ê¾Ò´Ù. ±×·¯³ª ÅðÀûÀ̳ª ±³¶õ ÈÄ ½Ã°£°æ°ú¿¡ µû¶ó °üÀÔÀúÇ×Ä¡ÀÇ Áõ°¡°¡ °üÂûµÇ¸é¼­ ÇöÀå½ÃÇèÀ» Áß½ÉÀ¸·Î ¸ð·¡ÀÇ aging È¿°ú¿¡ ´ëÇÏ¿© Ȱ¹ßÇÑ Á¶»ç°¡ ÀÌ·ç¾îÁ³°í, ÃÖ±Ù¿¡´Â ÇöÀå½ÃÇè»Ó¸¸ ¾Æ´Ï¶ó ½Ç³»½ÃÇè¿¡¼­µµ ¿©·¯ ¿¬±¸Àڵ鿡 ÀÇÇØ ¸ð·¡ÀÇ aging È¿°ú°¡ ±Ô¸í µÇ¾îÁö°í ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â ¸ð·¡ÀÇ ºñ¹è¼ö Á¤ÀûÀü´Ü°Åµ¿¿¡ ´ëÇÑ aging È¿°ú¸¦ »ìÆìº¸±â À§ÇØ ³«µ¿°­ ¸ð·¡¸¦ ÀÌ¿ëÇÏ¿© »ó´ë¹Ðµµ $(D_r)$, ¾Ð¹ÐÀÀ·Âºñ$(K_c)$ ±×¸®°í ¾Ð¹Ð½Ã°£À» ´Þ¸®ÇÏ¿© ºñ¹è¼ö Á¤Àû»ïÃà¾ÐÃà½ÃÇèÀ» ½Ç½ÃÇÏ¿´´Ù. ±× °á°ú ÀÀ·Â-º¯Çü·üÀÇ Åº¼º±¸°£³» ź¼º°è¼ö°¡ ¾Ð¹Ð½Ã°£ °æ°ú¿¡ µû¶ó Áõ°¡ÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç, ¶ÇÇÑ »óÀüÀÌÁ¡ °­µµ$(S_{PT})$¿Í ÇѰèÀÀ·ÂºñÁ¡ °­µµ$(S_{CSR})$µµ ¾Ð¹Ð½Ã°£ °æ°ú¿¡ µû¶ó Áõ°¡ÇÏ¿´´Ù. ±×·¯³ª °£±Ø¼ö¾Ðºñ$(u/{p_c}')$´Â ¾Ð¹Ð½Ã°£¿¡ ºñ·ÊÇÏ°Ô °¨¼ÒÇÏ´Â µî ¸ð·¡ÀÇ Á¤ÀûÀü´Ü¿¡¼­ ³ªÅ¸³ª´Â aging È¿°ú¸¦ °üÂûÇÒ ¼ö ÀÖ¾ú´Ù.
Aging effect of sands showed insignificant result in comparison with that of clay, so that it has not been studied so far. But, as penetration resistance increase has been observed with the lapse of time after deposition and disturbance, aging effect of sands has been actively investigated by field tests, and recently many researchers are performing not oª«y field tests but also laboratory tests on sands, so aging effects of sands have been also examined by laboratory tests. In this study, to observe the aging effect of undrained static shear behavior for Nak-Dong River sand, undrained static triaxial tests were performed with changing relative density$(D_r)$, consolidation stress ratio$(K_c)$, and consolidation time. These tests showed that modulus within elastic section increased as consolidation time increased, and in addition, phase transformation point strength$(S_{PT})$ and critical stress ratio point strength $(S_{CSR})$ also increased. But pore water pressure ratio$(u/{p_c}')$ decreased as consolidation time increased, so with this various result, aging effect of static shear for sands can be observed as well.
 
Ű¿öµå
Aging effect;Critical stress ratio;Elastic modulus;Failure line;Phase transformation line;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.20, no.6, 2004³â, pp.137-150
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200411922633905)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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