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Çѱ¹Áö¹Ý°øÇÐȸ / v.25, no.9, 2009³â, pp.5-17
¾Ð¹ÐħÇϸ¦ °í·ÁÇÑ ¸»¶ÒÀÇ ºÎ¸¶Âû·Â ¿¹Ãø ÇÁ·Î±×·¥ °³¹ß
( A Program Development for Prediction of Negative Skin Friction on Piles by Consolidation Settlement )
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ÀçÇÏ ÇÏÁß¿¡ ÀÇÇØ ¾Ð¹Ð µÇ´Â Áö¹Ý¿¡ °üÀÔ µÈ ¸»¶ÒÀÇ ÁöÁö·ÂÀ» ¿¹ÃøÇϰíÀÚ MATLABÀ» ÀÌ¿ëÇÑ GUIȯ°æ¿¡¼­ Pile NSF(Pile Negative Skin Friction)ÇÁ·Î±×·¥ÀÌ °³¹ßµÇ¾ú´Ù. º» ¿¬±¸¿¡¼­ Á¦¾ÈµÈ ¹æ¹ýÀº ÀÏÂ÷¿ø À¯ÇѺ¯À§ ¾Ð¹ÐÀÌ·ÐÀÌ Àû¿ëµÉ ¼ö ÀÖµµ·Ï ºñ¼±Çü ÇÏÁß ÀüÀ̹ý¿¡ ÀÇÇÑ ÀÏÂ÷¿ø ÅäÁú-¸»¶Ò ¸ðµ¨ ÇÁ·Î±×·¥ÀÎ OpenSees ¸¦ È®ÀåÇÏ¿´´Ù. °³¹ßµÈ ÇÁ·Î±×·¥Àº ¾Ð¹Ð°úÁ¤ Áß¿¡ ¹ß»ýÇÏ´Â ÅäÁú-¸»¶ÒÀÇ °æ°è¸é º¯È­´Â ¹°·Ð À¯ÇÑ Á¡ÅäÃþÀÇ Àú°¨ÀÌ °í·ÁµÇ´Â MikasaÀÇ À¯ÇѺ¯À§ÀÌ·ÐÀ» À¶ÇÕÇϴ Ư¼ºÀ» °¡Áö°í ÀÖ´Ù. ´õ ³ª¾Æ°¡ ¸»¶Ò Ÿ¼³ ÈÄ¿¡ ÀçÇϼºÅä¿¡ ÀÇÇØ ¹ß»ýÇÏ´Â Áö¹ÝÀÇ ¾Ð¹Ð»óŵµ ÇØ¼®½Ã¿¡ °í·ÁÇÒ ¼ö Àִ Ư¡À» Áö´Ï°í ÀÖ´Ù. º» ¿¬±¸¿¡¼­ Á¦¾ÈµÈ ¹æ¹ý¿¡ ÀÇÇÑ ÇÁ·Î±×·¥ ÇØ¼®Àº ºÎ¸¶Âû·ÂÀÌ ¹ß»ýÇÏ´Â ¸»¶Ò¿¡ ´ëÇÏ¿© ¸»¶Ò Àå±â½ÃÇè »ç·Ê °á°ú¿Í ºñ±³ÇÏ¿© Ÿ´ç¼ºÀÌ °ËÁõµÇ¾ú°í, ¾Ð¹ÐħÇϸ¦ ¹Ý¿µÇÑ ¸»¶ÒÀÇ ºÎ¸¶Âû·Â ¿¹ÃøÄ¡´Â ÃøÁ¤µÈ °á°ú¿Í Àß ÀÏÄ¡Çϰí ÀÖÀ½À» º¸¿©ÁÖ°í ÀÖ´Ù.
The microcomputer program PileNSF (Pile Negative Skin Friction) is developed by the authors in a graphical user interface (GUI) environment using $MATLAB^{(R)}$ for predicting the bearing capacity of a pile embedded in a consolidating ground by surcharge loading. The proposed method extends the one-dimensional soil-pile model based on the nonlinear load transfer method in OpenSees to perform an advanced one-dimensional consolidation settlement analysis based on finite strain. The developed program has significant features of incorporating Mikasa's finite strain consolidation theory that accounts for reduction in the thickness of the clay layer as well as the change of the soil-pile interface length during the progress of consolidation. In addition, the consolidating situation of the ground by surcharge filling after the time of pile installation can also be considered in the analysis. The program analysis by the presented method has been verified and validated with several case studies of long-term test on single piles subjected to negative skin friction. Predicted results of negative skin friction (downdrag and dragload) as a result of long from consolidation settlement are shown to be in good agreement with measured and observed case data.
 
Ű¿öµå
Finite strain consolidation theory;Negative skin friction;Nonlinear load transfer method;Piles;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.25, no.9, 2009³â, pp.5-17
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200934939599694)
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