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Çѱ¹Áö¹Ý°øÇÐȸ / v.23, no.1, 2007³â, pp.67-76
´ëº¯ÇüÀ» °í·ÁÇÑ flat DMTÀÇ 3Â÷¿ø °üÀÔ ÇØ¼®
( An Analysis of Flat DMT Penetration Based on a Large strain Formulation )
º¯À§¿ë;À̽·¡; Çѱ¹°úÇбâ¼ú¿ø °Ç¼³ ¹× ȯ°æ°øÇаú;Çѱ¹°úÇбâ¼ú¿ø °Ç¼³ ¹× ȯ°æ°øÇаú;
 
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´ëº¯ÇüÀ» °í·ÁÇÑ À¯ÇÑ¿ä¼Ò¹ýÀ» ÀÌ¿ëÇÏ¿© flat DMTÀÇ 3Â÷¿ø °üÀÔÀ» ¸ð»çÇÏ¿´´Ù. »ó¿ë ÇÁ·Î±×·¥À¸·Î ³Î¸® ¾Ë·ÁÁø ABAQUS/Explicit¸¦ ÀÌ¿ëÇÏ¿© flat DMTÀÇ 3Â÷¿ø °üÀÔ ÇØ¼®À» ¼öÇàÇÏ¿´À¸¸ç °üÀÔ µµÁß¿¡ ¹ß»ýµÇ´Â Å« ¿ä¼Ò º¯ÇüÀ» ÇØ°áÇϱâ À§ÇÏ¿© adaptive meshing ±â¹ýÀ» µµÀÔÇÏ¿´´Ù. ÇØ¼® °á°ú¸¦ ¹ÙÅÁÀ¸·Î, flat DMT ½ÃÇè¹æ¹ýÀ¸·ÎºÎÅÍ ¾ò¾îÁö´Â 3°¡Áö Áö¼ö Áß¿¡ ÇϳªÀÎ ¼öÆòÀÀ·ÂÁö¼ö($K_{D}$)¿Í Áö¹Ý ¼³°è Á¤¼öÀÎ ºñ¹è¼ö Àü´Ü°­µµ °£ÀÇ °ü°è¸¦ »ìÆìº¸¾Ò´Ù. ±× °á°ú $K_{D}=2$ Á¤±Ô¾Ð¹ÐÁö¹Ý¿¡¼­´Â Marchetti(1980)°¡ Á¦¾ÈÇÑ °æÇèÀû »ó°ü°ü°è½Ä°ú, $K_{D}$°¡ 2ÀÌ»óÀ¸·Î ¸ð»çµÇ´Â °ú¾Ð¹ÐÁö¹Ý¿¡¼­´Â Kamei & Iwasaki(1995)°¡ Á¦¾ÈÇÑ °æÇèÀû »ó°ü°ü°è½Ä°ú Àß ÀÏÄ¡ÇÏ´Â °á°ú¸¦ Á¦°øÇÏ¿´´Ù.
Flat DMT penetration was analyzed using a finite element model based on a large strain formulation. The ABAQUS/Explicit, a commercial finite element method, was used to study the flat DMT penetration in soils. Then, because the very large mesh distortion occurred due to the penetration of flat DMT, the adaptive meshing technique was utilized to maintain a high quality mesh configuration. The undrained shear strength obtained from the flat DMT is estimated using only the horizontal stress index ($K_{D}$) and so it became necessary to examine using the analysis results obtained from the penetration of the flat DMT. Analysis results show that in normally consolidated region of $K_{D}=2$, the results obtained from the correlations proposed by Marchetti show good agreement with those estimated from the finite element method. The present analysis also shows that in overconsolidated region of $K_{D}>2$, the results obtained from the relationships proposed by Kamei and Iwasaki show good agreement with those provided by the penetration analysis.
 
Ű¿öµå
Flat dilatometer test (DMT);Finite element method;Penetration;Undrained shear strength;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.23, no.1, 2007³â, pp.67-76
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200708508460815)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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