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Çѱ¹Áö¹Ý°øÇÐȸ / v.27, no.9, 2011³â, pp.87-98
1g Áøµ¿´ë ½ÇÇèÀ» ÀÌ¿ëÇÑ ¾×»óÈ­ Áö¹Ý¿¡ ±ÙÀÔµÈ ¸»¶Ò¿¡ ÀÛ¿ëÇÏ´Â µ¿Àû Åä¾Ð ºÐ¼®
( Analysis of Dynamic Earth Pressure on Piles in Liquefiable Soils by 1g Shaking Table Tests )
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º» ¿¬±¸¿¡¼­´Â 1g Áøµ¿´ë ½ÇÇèÀ» ÅëÇØ ÁöÁø½Ã ¾×»óÈ­ Áö¹Ý¿¡ ±ÙÀÔµÈ ¸»¶Ò¿¡ ÀÛ¿ëÇÏ´Â µ¿Àû Åä¾ÐÀÇ Å©±â ¹× À§»ó º¯È­¸¦ ºÐ¼®ÇÏ¿´´Ù. °ÇÁ¶ »çÁúÅä Áö¹Ý¿¡ ¼³Ä¡µÈ ¸»¶ÒÀÇ °æ¿ì ¸»¶Ò »óºÎ ÇÏÁß °ü¼º·ÂÀÇ ¿µÇâÀ¸·Î ÁöÇ¥¸é °¡±îÀÌ¿¡¼­ µ¿Àû Åä¾ÐÀÌ Å©°Ô ÀÛ¿ëÇÏ°í ±íÀ̰¡ ±í¾îÁú¼ö·Ï µ¿Àû Åä¾ÐÀÌ °¨¼ÒÇÏ´Â µ¥ ºñÇØ, ¾×»óÈ­ Áö¹Ý¿¡ ¼³Ä¡µÈ ¸»¶ÒÀÇ °æ¿ì µ¿Àû Åä¾ÐÀÇ Å©±â ¹× ¹ß»ý ¾ç»óÀº Áö¹Ý ³»¿¡ ¹ß»ýÇÑ °úÀ×°£±Ø¼ö¾ÐÀÇ Å©±â ¹× ¹ß»ý ¾ç»ó°ú À¯»çÇÏ¿´À¸¸ç, °ü¼º·ÂÀÇ ¿µÇâÀº °ÅÀÇ ¾ø´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¶ÇÇÑ, °ÇÁ¶ »çÁúÅä ¹× Æ÷È­ »çÁúÅä¿¡¼­ ¾×»óÈ­°¡ ¹ß»ýÇÏÁö ¾Ê´Â °æ¿ì ¸»¶Ò¿¡ ÀÛ¿ëÇÏ´Â µ¿Àû Åä¾Ð°ú »óºÎ ÇÏÁßÀÇ °ü¼º·ÂÀº ¼­·Î ¹Ý´ë ¹æÇâÀ¸·Î ÀÛ¿ëÇÏ´Ù°¡, ¾×»óÈ­ ¹ß»ý½Ã¿¡´Â ÁöÇ¥¸é °¡±îÀÌ¿¡¼­ µ¿ÀÏÇÑ ¹æÇâÀ¸·Î ÀÛ¿ëÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç, ¾×»óÈ­ ÈÄ¿¡´Â °ü¼º·Â ¿µÇâÀÌ ¼Ò¸êµÇ¾î µ¿Àû Åä¾Ð Å©±â°¡ Å©°Ô °¨¼ÒÇÏ¿´´Ù. ³¡À¸·Î ¾×»óÈ­ ¹ß»ý½Ã ¸»¶Ò¿¡ ÀÛ¿ëÇÏ´Â µ¿Àû Åä¾ÐÀÇ Áøµ¿ ¼ººÐÀÇ Å©±â´Â ¾Èº® ±¸Á¶¹°ÀÇ µ¿Àû ¼ö¾ÐÀ» »êÁ¤ÇÏ´Â Westergaard ½ÄÀ¸·Î »êÁ¤ÇÑ °ªÀÇ ¾à 50% Á¤µµ¿´´Ù.
In this study, the magnitude and phase variation of dynamic earth pressure acting on a pile in liquefiable soils were analyzed using a series of 1g shaking table tests. In the case of a pile in dry sand, the value of the dynamic earth pressure was the highest near the surface due to the inertia force of the upper load on the pile and it decreased as the depth of the pile got lower. On the other hand, for a pile in liquefiable sand, the magnitude and shape of the dynamic earth pressure were similar to those of the excess pore pressure and was largely affected by the deformation of soils. Furthermore, the inertia force of the upper load and the dynamic earth pressure acted in opposite directions in cases of dry sand and saturated sand where low excess pore pressure had developed. However, after liquefaction, those force components near surface acted unfavorably in the same direction. Finally, the Westergaard¡¯s solution was modified and proposed as a method to evaluate the magnitude of dynamic earth pressure acting on a pile during liquefaction.
 
Ű¿öµå
1g Shaking table tests;Dynamic earth pressure;Liquefaction;Pile;Soil-pile interaction;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.27, no.9, 2011³â, pp.87-98
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201107654735966)
¾ð¾î : Çѱ¹¾î
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