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Çѱ¹Áö¹Ý°øÇÐȸ / v.27, no.5, 2011³â, pp.45-59
µµ½ÄÀû »ó.Çϰè¹ýÀ» ÀÌ¿ëÇÑ ºñ¹è¼ö Á¡ÅäÁö¹Ý¿¡¼­ ¾èÀº ±âÃÊÀÇ ÁöÁö·Â°è¼ö
( Bearing Capacity Factor of Shallow Foundation in Undrnined Clay Using the Diagrammatic Upper and Lower Bound Methods )
ÀÌ¿ëÁÖ; ±¹¸³¼­¿ï°úÇбâ¼ú´ëÇб³ °Ç¼³°øÇкÎ;
 
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º» ³í¹®Àº ºñ¹è¼ö Á¡ÅäÁö¹Ý¿¡¼­ ¾èÀº ±âÃÊÀÇ ÁöÁö·Â°è¼öÀÎ $N_c$°ªÀ» µµ½ÄÀû »ó°è¹ý°ú Çϰè¹ýÀ» ÀÌ¿ëÇØ ÀÌ·ÐÀûÀ¸·Î À¯µµÇϰí À̸¦ Prandtl(1921)ÀÌ Á¦¾ÈÇÑ °ª°ú ºñ±³ÇÏ¿´´Ù. ±× °á°ú, »ó°è¹ý°ú Çϰè¹ýÀÌ ÀÏÄ¡ÇÏ´Â °ªÀÌ Prandtl(1921)ÀÌ Á¦¾ÈÇÑ $N_c$ °ªÀÌ 5.14ÀÓÀ» È®ÀÎÇÏ¿´À¸¸ç, À¯ÇÑ¿ä¼ÒÇØ¼® °á°úµµ ¾èÀº ±âÃʰ¡ ÆÄ±«ÇÏÁß¿¡ µµ´ÞÇÒ ¶§ÀÇ $N_c$°¡ 5.14·Î ³ªÅ¸³µ´Ù. ÀÌ·¯ÇÑ À¯ÇÑ¿ä¼ÒÇØ¼® °á°ú´Â À¯ÇÑ¿ä¼Ò ÇüÅÂ(finite e1ement type)¿Í ¼ö, ±×¸®°í ÁõºÐ¼ö(increments)¿¡ Å©°Ô ÀÇÁ¸ÇÑ´Ù. º» ¿¬±¸¸¦ ÅëÇØ »ó°è¹ý¿¡¼­ ±¸ÇÑ °ª°ú Çϰè¹ý¿¡¼­ ±¸ÇÑ °ªÀÌ ¼­·Î ÀÏÄ¡ÇÒ ¶§ ºñ·Î¼Ò ÀÌ·ÐÀûÀ¸·Î Á¤È®ÇÑ °ªÀÓÀ» Á¤ÀÇÇÒ ¼ö ÀÖÀ¸³ª, ÀÏÄ¡ÇÏ´Â °ªÀ» À¯µµÇÏ´Â ÀÏÀº ¸Å¿ì ¾î·Á¿ì¸ç ÀϹÝÀûÀ¸·Î »ó°è¹ýÀÇ ÇØ¿Í Çϰè¹ý ÇØ »çÀÌ¿¡ Á¸ÀçÇÑ´Ù°í º¼ ¼ö ÀÖ´Ù.
This study introduces the diagrammatic Upper and Lower Bound (UB and LB) methods theoretically in order to derive the bearing capacity factor, $N_c$ in undrained clay and to compare with Prandtl's exact solution (1921). As a result of the theoretical study, an exact solution comes out when the UB and LB solutions are the same. In addition, the finite element analyses show that the failure loads approach to the bearing capacity factor of 5.14. Results of the FEA significantly depend on the finite element type, a number of elements, and a number of increments. From this study the exact solution defines that solutions from UB and LB are the same. However, this situation is very difficult to process, so we can confirm the exact solution as a range between UB and LB solutions.
 
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Bearing capacity factor;Diagrammatic Upper and Lower Bound (UB and LB) methods;Exact solution;Finite element analysis;Shallow foundation;Undrained clay;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.27, no.5, 2011³â, pp.45-59
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201121559391880)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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