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Çѱ¹Áö¹Ý°øÇÐȸ / v.22, no.1, 2006³â, pp.35-44
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½ÇÆ®Áú ¸ð·¡Áö¹ÝÀÇ ºñ¼±Çü °µµ ¹× °¼ºµµ ÃßÁ¤¹ý
( Estimation of Non-linear Strength and Stiffness for Silty Sands ) |
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| ÀϹÝÀûÀ¸·Î ÇöÀåÁö¹ÝÀº ´ëºÎºÐ ÀÏÁ¤·®ÀÇ ¼¼¸³ºÐÀ» Æ÷ÇÔÇϰí ÀÖÀ¸¹Ç·Î ¼¼¸³ºÐ ÇÔÀ¯·®À» °í·ÁÇÑ Áö¹Ý °Åµ¿¿¡ °üÇÑ ¿¬±¸°¡ ¿ä±¸µÈ´Ù. ÀÌ¿Í ´õºÒ¾î, ±âÃÊ Áö¹ÝÀº ÇÏÁßÃʱâ´Ü°èºÎÅÍ »ó´çÇÑ ºñ¼±Çü °Åµ¿Æ¯¼ºÀ» ³ªÅ¸³»°í ÀÖ¾î, ÀÀ·Â´Ü°è¿¡ µû¸¥ Áö¹ÝÀÇ ºñ¼±Çü¼º ¶ÇÇÑ ¸Å¿ì Áß¿äÇÑ °í·Á»çÇ×ÀÌ´Ù. º» ¿¬±¸¿¡¼´Â ÀÏ·ÃÀÇ ½Ç³»½ÃÇèÀ» ¼öÇàÇÏ¿© Áö¹ÝÀÇ Àü´Ü°µµ ¹× ºñ¼±Çü °¨¼è Ư¼ºÀ» µµÃâÇϰíÀÚ ÇÏ¿´À¸¸ç, ¼öÁ¤ Hyerbolic ¸ðµ¨À» Àû¿ëÇÏ¿© ºÐ¼®µÈ ½ÇÆ®Áú ¸ð·¡ Áö¹ÝÀÇ ºñ¼±Çü °Åµ¿Æ¯¼ºÀº ½ÇÆ®ÇÔÀ¯·®°ú »ó´ë¹Ðµµ¿¡ ÀÇÇØ Á¤·®ÈµÇ¾ú´Ù. ½ÇÆ®Áú ¸ð·¡ ½Ã·áÀÇ ÀÀ·Â-º¯Çü·ü °î¼±À» µµÃâÇϱâ À§ÇØ ¼¼¸³ºÐ ÇÔÀ¯·®À» º¯È½ÃÄѰ¡¸ç ÀÏ·ÃÀÇ »ïÃà¾ÐÃà½ÃÇèÀÌ ¼öÇàµÇ¾ú´Ù. ¶ÇÇÑ ºñ¼±Çü Ư¼ºÀÇ Á¤±ÔÈ¿¡ ¿ä±¸µÇ´Â ¹Ì¼Òº¯Çü·ü ±¸°£ÀÇ ÃʱâÀü´Üź¼º°è¼öÀÇ µµÃâÀ» À§Çؼ »ïÃà¾ÐÃà½ÃÇèÀÇ ½Ã·áÁ¶°Ç°ú À¯»çÇÑ ½Ã·á¿¡ ´ëÇØ °øÁøÁÖ½ÃÇèÀÌ ¼öÇàµÇ¾ú´Ù. ¶ÇÇÑ ½ÇÆ®ÇÔÀ¯·®º°·Î µµÃâµÈ ºñ¼±Çü Ư¼ºÄ¡´Â »ó´ë¹ÐµµÀÇ ¿µÇâÀÌ °¡Àå Å« °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç, »ó´ë¹Ðµµ Áõ°¡¿¡ µû¶ó ÆÄ±«½ÃÀÇ Åº¼º°è¼öÀÇ ºñÀÎ f°ªÀº °¨¼ÒÇϰí, Áö¹Ý°¼ºµµ °¨¼èÀ²À» ³ªÅ¸³»´Â 9ÀÇ °æ¿ì Áõ°¡ÇÏ´Â °æÇâÀ» ³ªÅ¸³»¾ú´Ù. ÀÌ¿Í ´õºÒ¾î ºñ¼±Çü Ư¼ºÄ¡¸¦ »ó´ë¹Ðµµ $D_R$À» °£±Øºñ·Î ȯ»êÇÑ Àý´ëÀû °£±Øºñ $e_{sk}$¿¡ µû¸¥ Á¤·®È °á°úÀÇ °æ¿ì, $e_{sk}$ÀÇ Áõ°¡¿¡ µû¶ó f°ªÀº Áõ°¡Çϰí g°ªÀº °¨¼ÒÇÏ´Â °æÇâÀ» ³ªÅ¸³»¾ú´Ù. |
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| In general typically granular soils contain a certain amount of fines. It is also widely recognized that foundation soils under working loads show highly non-linear behavior from very early stages of loading. In the present study, a series of laboratory tests with sands of different silt contents are conducted and methods to assess strength and stiffiness characteristics are proposed. Modified hyperbolic stress-strain model is used to analyze non-linearity of silty sands in terms of non-linear Degradation parameters f and g as a function of silt contents and Relative density Dr. Stress-strain curves were obtained from a series of triaxial tests on sands containing different amounts of silt. Initial shear modulus, which is used to normalize Degradation modulus of silty sands, was determined from resonant column test results. From the laboratory test results, it was observed that, as the Relative density increases, values of f decrease and those of g increase. In addition, it was found that values of f and g increase and decrease respectively as a Skeleton void ratio $(e_{sk})$ increases. |
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| Ű¿öµå |
| Degradation parameters;Hyperbolic model;Relative density;Silty sand;Skeleton void ratio; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.22, no.1, 2006³â, pp.35-44
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200612842603188)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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