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Çѱ¹Áö¹Ý°øÇÐȸ / v.21, no.8, 2005³â, pp.13-26
Aging È¿°ú¿¡ µû¸¥ ³«µ¿°­ ¸ð·¡ÀÇ ºñ¹è¼ö ¹Ýº¹Àü´Ü°Åµ¿ Ư¼º
( Characteristics of Undrained Cyclic Shear Behavior for the Nak-dong River Sand Due to the Aging Effect )
±è´ë¸¸;±è¿µ¼ö;Á¤¼º°ü;¼­ÀνÄ; °æºÏ´ëÇб³ Åä¸ñ°øÇаú;°æºÏ´ëÇб³ Åä¸ñ°øÇаú;°æºÏ´ëÇб³ Á¶°æÇаú;°æµ¿Á¤º¸´ëÇÐ Åä¸ñ°ú;
 
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¸ð·¡ÀÇ agingÇö»óÀº Á¡¼ºÅä¿¡ ºñÇÏ¿© ¹«½ÃÇÒ Á¤µµ·Î ¸Å¿ì À۾Ƽ­ 1980³â´ë ÃʱîÁö´Â °ÅÀÇ ¿¬±¸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¸íµÇ¾îÁö°í ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â ¸ð·¡ÀÇ ºñ¹è¼ö ¹Ýº¹Àü´Ü°Åµ¿¿¡ ´ëÇÑ agingÈ¿°ú¸¦ »ìÆìº¸±â À§ÇØ ³«µ¿°­ ¸ð·¡¸¦ ÀÌ¿ëÇÏ¿© »ó´ë¹Ðµµ$(D_r)$, ¾Ð¹ÐÀÀ·Âºñ$(K_c)$ ±×¸®°í ¾Ð¹Ð½Ã°£À» ´Þ¸®ÇÏ¿© ºñ¹è¼ö ¹Ýº¹»ïÃà¾ÐÃà½ÃÇèÀ» ½Ç½ÃÇÏ¿´´Ù. ½ÃÇè°á°ú, ºñ¹è¼ö ¹Ýº¹Àü´Ü°­µµ$(R_f)$´Â ¾Ð¹Ð½Ã°£¿¡ µû¶ó Áõ°¡ÇÑ´Ù´Â »ç½ÇÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù. º» ½ÃÇè°á°ú¿¡¼­ ³ªÅ¸³­ aging ¿¡ µû¸¥ $R_f$ Áõ°¡À²À» ÀÌ¿ëÇÏ¿© ³«µ¿°­ ¸ð·¡Áö¹ÝÀÇ ÁöÁø±Ô¸ðº° ºñ¹è¼ö ¹Ýº¹Àü´Ü°­µµÀÇ ÇöÀåÀû¿ë ¹üÀ§¸¦ Á¦¾ÈÇÏ¿´´Ù.
It was known that the aging effect of sands is insignificant in comparison with clays, and hence the study on this effect had seldom been performed prior to the early 1980s. However, field tests for this effect have been actively carried out since it was investigated that penetration resistance of reformed sands increased with the lapse of time. Recently, the aging effect of sands has also been examined in laboratory testings. In this study, undrained static triaxial tests were performed to evaluate the effect on the Nak-dong River sands, with different .elative densities $(D_r)$, consolidation stress ratios $(K_c)$, and consolidation times. As a result of the tests, it was proved that the undrained cyclic shear strength $(R_f)$ increased with the aged time on the sands. The in situ range of Rf on the sands, which is applicable to the magnitude of earthquake in the Nak-dong River area, was proposed by using the test results.
 
Ű¿öµå
Aging effect;Consolidation stress ratio;Consolidation time;The Nak-dong River sand;Undrained cyclic shear strength;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.21, no.8, 2005³â, pp.13-26
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200507523322166)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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