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Çѱ¹Áö¹Ý°øÇÐȸ / v.27, no.7, 2011³â, pp.47-57
3Â÷¿ø ¼öÄ¡ÇØ¼®À» ÀÌ¿ëÇÑ Á¡¼ºÅä Áö¹ÝÀÇ p-y °î¼± »êÁ¤
( Evaluation of p-y Curves of Piles in Soft Deposits by 3-Dimensional Numerical Analysis )
À̽ÃÈÆ;±è¼º·Ä;ÀÌÁÖÇü;Á¤¹®°æ; µ¿¾Æ´ëÇб³ Åä¸ñ°øÇаú;µ¿¾Æ´ëÇб³ Åä¸ñ°øÇаú;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø;
 
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¼öÆòÇÏÁßÀ» ¹Þ´Â ¸»¶Ò±âÃÊÀÇ ¼³°è¸¦ À§ÇÏ¿© p-y °î¼±À» ÀÌ¿ëÇÑ ÇØ¼®¹ýÀÌ ³Î¸® »ç¿ëµÇ°í ÀÖ´Ù. ÀÌ ¶§, ÅäÁú ¹× ±âÃÊÆ¯¼º¿¡ ÀûÇÕÇÑ p-y °î¼±ÀÇ ¼±Á¤ÀÌ Áß¿äÇÔ¿¡µµ ºÒ±¸Çϰí ÇöÀç p-y °î¼±¿¡ ´ëÇÑ ¿¬±¸´Â ¸Å¿ì ºÎÁ·ÇÑ ½ÇÁ¤ÀÌ´Ù. º» ¿¬±¸¿¡¼­´Â 3Â÷¿ø ¼öÁöÇØ¼®À» ÇÁ·Î±×·¥À» ÀÌ¿ëÇÏ¿© Á¡¼ºÅä Áö¹Ý¿¡ ±ÙÀÔµÈ ÇöÀ埼³¸»¶Ò¿¡ ´ëÇÑ p-y °î¼±À» »êÁ¤ÇÏ¿´´Ù. ¸ÕÀú ÇöÀåÀçÇϽÃÇèÀ¸·ÎºÎÅÍ ¾ò¾îÁø ´ÜÀϸ»¶ÒÀÇ p-y °î¼±°ú ¼öÄ¡ÇØ¼®À¸·ÎºÎÅÍ ¾ò¾îÁø p-y °î¼±À» ºñ±³ÇÏ¿© ¼öÄ¡ ¸ðµ¨¸µÀ» °ËÁõÇÏ¿´´Ù. ±×¸®°í, ´ÜÀϸ»¶Ò¿¡ ´ëÇÏ¿© ¸»¶ÒÁ÷°æ, ¸»¶Ò ź¼º°è¼ö, ¸»¶ÒµÎºÎ ±¸¼ÓÁ¶°Ç, ±×¸®°í ¹«¸®¸»¶Ò¿¡ ´ëÇÏ¿© ¸»¶Ò°£°ÝÀ» º¯È­½Ã°Å¸ç ¸Å°³º¯¼ö ¿¬±¸¸¦ ¼öÇàÇÏ¿´´Ù. ÃÖÁ¾ÀûÀ¸·Î, ´ÜÀϹ߶Ұú ¹«¸®¹ß¶ÒÀÇ p-y °î¼±À» ºñ±³ÇÏ¿© ¹«¸®¸»¶Ò È¿°ú¸¦ ³ªÅ¸³»´Â p-multiplier¸¦ »êÁ¤ÇÏ¿´´Ù. ±× °á°ú, ¸»¶Ò°£°Ý 3DÀÇ p-multiplier °ªÀº ù ¹øÂ° ¿­ 0.86, °¡¿îµ¥ ¿­ 0.69, ¸¶Áö¸· ¿­ 0.77·Î¼­ ±âÁ¸¿¡ Á¦¾ÈµÈ O'Neill and ReeseÀÇ °á°ú¿Í À¯½ÃÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¸»¶Ò°£°Ý 6D ÀÌ»óÀÎ °æ¿ì ¹«¸®¸»¶Ò È¿°ú´Â ¹«½ÃÇÒ ¼ö ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù.
The p-y curve has been used to design pile foundations subjected to lateral loading. Although the p-y curve has a large influence on the pile lateral behavior, p-y curves have not been clearly suggested. In this study, the p-y curve of clay was evaluated for drilled shafts in marine deposits by using 3-dimensional numerical analyses. First, the optimization study was performed to properly determine boundary extent, mesh size, and interface stiffness. The numerical modeling in the study was verified by comparing the calculated and the pile loading test results. Then, the p-y curves of single and group piles were evaluated from the parametric study. The selected parameters were pile diameter, pile Young's modulus and pile head fixed condition for a single pile, and pile spacing for group piles. Finally, the p-multiplier was evaluated by comparing the p-y curves of a single pile and group piles. As a result, the p-multiplier at pile spacing of 3D was 0.83, 0.67 and 0.78 for the front, middle, and back row piles, respectively, and showed values similar to those of O'Neill and Reese (1999). For the pile group with pile spacing larger than 60, the group effect can be ignorable.
 
Ű¿öµå
Drilled shafts;Group effect;Numerical analysis;P-multiplier;P-y curve;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.27, no.7, 2011³â, pp.47-57
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201128563052713)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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