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Çѱ¹Áö¹Ý°øÇÐȸ / v.23, no.4, 2007³â, pp.113-123
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º¸°Åä¿¡¼ÀÇ ¹è¼ö ¹× ºñ¹è¼ö Àι߷¿¡ ´ëÇÑ ¼öÄ¡ÇØ¼®
( Numerical Analysis on Drained and Undrained Pullout Capacity in Reinforced Soil ) |
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| Åõ¼ö°è¼ö°¡ ³·Àº µÚä¿ò ÈëÀ» »ç¿ëÇÏ´Â º¸°Åä´Â ºñ¹è¼ö »óÅ¿¡ ³õÀÏ °æ¿ì ±× ¾ÈÁ¤¼ºÀÌ ¿ì·ÁµÇ¹Ç·Î ºñ¹è¼ö Àι߷ÂÀÇ º¯È¸¦ »çÀü¿¡ ÆÄ¾ÇÇÏ¿© ¼³°è¿¡ ¹Ý¿µÇÏ´Â °ÍÀÌ Áß¿äÇÏ´Ù. º» ³í¹®Àº ½ÇÆ®Áú ¸ð·¡¿¡ »ðÀÔµÈ °º¸°Àç¿¡ ´ëÇÑ ¹è¼ö ¹× ºñ¹è¼ö Àι߽ÃÇè¿¡ ´ëÇÑ ¼öÄ¡ÇØ¼®À» ¼öÇàÇÏ¿© ±× ºÐ¼®°á°ú¸¦ ¼Ò°³Çϰí ÀÖ´Ù. ÇØ¼®¿¡ Àû¿ëµÈ ÈëÀº °¢°¢ 0%(¼ø¼ö¸ð·¡), 5%, 10%, ±×¸®°í 15% ½ÇÆ®Áú ¸ð·¡¿´À¸¸ç, »óÀçÇÏÁßÀº 30kPa, 100kPa°ú 200kPaÀÌ ¾ú´Ù. ÇØ¼®°á°ú ¹è¼ö Àι߷°ú ºñ¹è¼ö Àι߷ ¸ðµÎ ½ÇÆ® ÇÔÀ¯·®¿¡ ÀÇÇØ ¿µÇâÀ» ¹Þ°í, ÈëÀÇ ³»ºÎ¸¶Âû°¢°ú »óÀçÇÏÁßÀÌ Áõ°¡ÇÔ¿¡ µû¶ó Àι߷ ¶ÇÇÑ Áõ°¡ÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ºñ¹è¼ö ½ÃÇè¿¡¼´Â °úÀ×°£±Ø¼ö¾ÐÀÌ ¹ß»ýÇÔ¿¡ µû¶ó º¸°Àç¿¡ ÀÛ¿ëÇÏ´Â À¯È¿ÀÀ·ÂÀÌ °¨¼ÒÇÏ¿´À¸¸ç, ±× °á°ú ¹è¼ö Àι߷¿¡ ºñÇØ ºñ¹è¼ö Àι߷ÂÀÌ »óÀçÇÏÁß 30kPa¿¡¼ ¾à 57%, ±×¸®°í 100kPa°ú 200kPa¿¡¼ ¾à 70%·Î °¨¼ÒÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ÀÌ·¯ÇÑ ¼öÄ¡ÇØ¼®°á°ú´Â ±âÁ¸¿¡ °°Àº Á¶°Ç¿¡¼ ¼öÇàµÈ ½Ç³»¸ðµ¨½ÃÇè °á°ú¿Í Àß ÀÏÄ¡ÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. |
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| In order to ensure the stability of reinforced structures backfilled with low permeability soil, it is very important to determine the change in undrained pullout capacity compared to drained pullout capacity prior to design. In this research, a series of numerical analyses on laboratory pullout tests have been performed on different materials (clean sand, 5, 10, and 15% silty sand), different overburden pressures (30, 100 and 200 kPa), and different drainage conditions (drained and undrained) in order to compare drained pullout capacity with undrained pullout capacity. The results of numerical analysis also have been compared with the results of the laboratory pullout tests. The analysis results show that both drained and undrained pullout capacity are influenced by silt contents and increase with increase of friction angle of the soil and overburden pressure. In undrained condition, the effective stresses acting on the reinforcement decrease as excessive pore pressures are generated, resulting in decrease in pullout capacity; 57% for 30 kPa, and 70% for 100 and 200 kPa. These results show a good agreement with the results of the laboratory pullout tests performed under the same condition. |
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| Ű¿öµå |
| Drained;Numerical analysis;Pullout test;Reinforced soil;Undrained; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.23, no.4, 2007³â, pp.113-123
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200718411577270)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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