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Çѱ¹Áö¹Ý°øÇÐȸ / v.26, no.8, 2010³â, pp.77-88
1g Áøµ¿´ë ½ÇÇèÀ» ÀÌ¿ëÇÑ »çÁúÅä Áö¹Ý¿¡¼­ÀÇ µ¿Àû ±º¸»¶Ò È¿°ú ºÐ¼®
( Evaluation of Dynamic Group Pile Effect in Sand by 1 g Shaking Table Tests )
¾çÀDZÔ;ÃÖÁ¤ÀÎ;ÇÑÁøÅÂ;±è¸í¸ð; GS °Ç¼³ Åä¸ñ±â¼ú¼³°èÆÀ;¼­¿ï´ëÇб³ °Ç¼³È¯°æ°øÇкÎ;¼­¿ï´ëÇб³ °Ç¼³È¯°æ°øÇкÎ;¼­¿ï´ëÇб³ °Ç¼³È¯°æ°øÇкÎ;
 
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º» ¿¬±¸¿¡¼­´Â ´Ù¾çÇÑ »ó´ë¹ÐµµÀÇ °ÇÁ¶, Æ÷È­ »çÁúÅä Áö¹ÝÀ» Á¶¼ºÇϰí, ±º¸»¶ÒÀÇ Á᫐ °£°ÝÀ» ¸»¶Ò Áö¸§ÀÇ 3¹è, 5¹è, 7¹è·Î Á¶Á¤Çϸç 1g Áøµ¿´ë ½ÇÇèÀ» ¼öÇàÇÏ¿´´Ù. ½ÇÇèÀ¸·Î ¾òÀº µ¿Àû p-y °î¼±À» ºÐ¼®ÇÏ¿©, ¸»¶ÒÁ߽ɰ£ °£°Ý, ±º¸»¶Ò ³»¸»¶ÒÀÇ À§Ä¡, Áö¹ÝÀÇ »ó´ë¹Ðµµ, ±×¸®°í Áøµ¿ Áß ¹ß»ýÇÏ´Â °úÀ×°£±Ø¼ö¾Ð¿¡ µû¶ó ±º¸»¶ÒÀÇ µ¿Àû p-y °î¼±ÀÌ ´Þ¶óÁö´Â °ÍÀ» È®ÀÎÇÏ¿´´Ù. Yang µî(2009)ÀÌ Á¦½ÃÇÑ ´Ü¸»¶ÒÀÇ µ¿Àû p-y ÁßÃß°î¼±°ú ±º¸»¶ÒÀÇ µ¿Àû p-y °î¼±À» ºñ±³ÇÏ¿© µ¿Àû p-½Â¼ö¸¦ »êÁ¤Çغ» °á°ú, ÀԷ°¡¼Óµµ ÁøÆø°ú Áö¹ÝÀÇ »ó´ë¹Ðµµ°¡ Áõ°¡ÇÒ¼ö·Ï p-½Â¼öÀÇ °ªÀÌ Áõ°¡ÇÏ¿´À¸¸ç, ¸»¶Ò Á᫐ °£°ÝÀÌ ¸»¶ÒÁö¸§ÀÇ 7¹è°¡ µÇ¾úÀ» °æ¿ì ±º¸»¶Ò È¿°ú°¡ »ç¶óÁö´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ±âÁ¸ÀÇ ¿¬±¸ÀÚµéÀÌ Á¦¾ÈÇÑ Á¤Àû, µ¿Àû p-½Â¼ö °ªµé°ú ¿ì¸®³ª¶ó ±âÁؼ­¿¡¼­ Á¦¾ÈÇϰí ÀÖ´Â p-½Â¼ö °ªµéÀº »ìÇè°ª°ú ºñ±³ÇÏ¿© ÃÖ´ë 0.7(¾à 70%) Á¤µµ±îÁö Â÷À̸¦ º¸¿´À¸¸ç ÀÌ¿¡ º» ¿¬±¸¿¡¼­´Â ¸»¶Ò Á᫐ °£°Ý°ú Áö¹ÝÀÇ »ó´ë¹Ðµµ¸¦ ±âÁØÀ¸·Î µ¿Àû p-½Â¼ö °ªÀ» »õ·Ó°Ô Á¦¾ÈÇÏ¿´´Ù.
In this study, 1 g shaking table group pile tests were performed for various conditions of subgrade and pile spacing. The pile spacing was changed from three to seven times of pile diameters. It could be confirmed that the dynamic p-y curves for the group pile observed as the results of a series of shaking table tests show difference according to the pile spacing, the pile location within the pile group, the relative density of subgrade and the excess pore pressure during earthquake. The dynamic p-multipliers were calculated by comparing the dynamic p-y backbone curves of a single pile suggested by Yang (2009) and dynamic p-y curves for the group pile. Dynamic p-multiplier values overall increase as the relative density of subgrade and amplitude of input acceleration increase. The dynamic group pile effect was neglected, if the pile spacing was seven times as large as pile diameters. It was found that the exisiting p-multiplier values suggested by various researchers for the static and dynamic loading, and the values recommended by globally used specifications show difference with the test results by up to 0.7 (approximately 70%). Therefore, the dynamic p-multipliers were newly suggested according to the pile spacing and the relative density of subgrade using the test results.
 
Ű¿öµå
Dynamic p-multiplier;Dynamic p-y curve;Dynamic p-y backbone curve;1 g shaking table test;Pile spacing;Pile location within the pile group;Relative density of subgrade;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.26, no.8, 2010³â, pp.77-88
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201033538932687)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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