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Çѱ¹Áö¹Ý°øÇÐȸ / v.18, no.5, 2002³â, pp.37-42
Àΰø½Å°æ¸ÁÀ» ÀÌ¿ëÇÑ Áö¹ÝÀÇ ¾×»óÈ­ °¡´É¼º ÆÇº°
( The Analysis of Liquefaction Evaluation in Ground Using Artificial Neural Network )
À̼Û;¹ÚÇü±Ô; ¼­¿ï½Ã¸³´ëÇб³ µµ½Ã°úÇдëÇÐ Åä¸ñ°øÇаú;¼­¿ï½Ã¸³´ëÇб³ µµ½Ã°úÇдëÇÐ Åä¸ñ°øÇаú;
 
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Àΰø½Å°æ¸ÁÀº º¹ÀâÇÑ »óÈ£°ü°è¸¦ °¡Áö´Â ¹®Á¦ÀÇ ÇØ°áÀ» À§ÇÑ È¿°úÀûÀÎ ÄÄÇ»ÅÍ Å×Å©´ÐÀ¸·Î½á ¸¹Àº ºÐ¾ß¿¡ Ȱ¹ßÈ÷ Ȱ¿ëµÇ°í ÀÖ´Ù. º» ³í¹®¿¡¼­´Â Áö¹ÝÀÇ ¾×»óÈ­ °¡´É¼ºÀ» ÆÇº°Çϱâ À§ÇÏ¿© Àΰø½Å°æ¸Á ÀÌ·ÐÀ» »ç¿ëÇÏ¿´À¸¸ç, À̸¦ À§ÇÏ¿© ¹Ýº¹»ïÃà¾ÐÃà½ÃÇè °á°ú¿Í Å伺ÀÚ·á, Áö¹ÝÁ¶»çÀÚ·á µîÀ» ÇнÀÀÎÀÚ·Î »ç¿ëÇÏ¿´´Ù. ÇнÀ°ú °ËÁõ¿¡ ¼­ÇؾÈÁö¿ªÀÇ 43°³ÀÇ ¹Ýº¹»ïÃà¾ÐÃà½ÃÇè µ¥ÀÌÅͰ¡ »ç¿ëµÇ¾ú´Ù. ¿©±â¼­ Àΰø½Å°æ¸ÁÀÇ ÇнÀÀº ¿¹ÃøµÈ CSR°ú ½ÇÃøÇÑ CSR »çÀÌÀÇ ¿ÀÂ÷°¡ Àû¾îÁöµµ·Ï ½Å°æ¸ÁÀÇ °¡ÁßÄ¡¸¦ ¼öÁ¤ÇÏ´Â °ÍÀ¸·Î ÀÌ·ç¾îÁø´Ù. Àüü ½Å°æ¸Á¿¡ ´ëÇÑ Æò±ÕÁ¦°öÀÇ ¿ÀÂ÷°¡ Çã¿ëÄ¡ À̳»·Î °¨¼ÒÇÒ ¶§±îÁö ÇнÀÀº ¹Ýº¹µÇ¾î ÁøÇàµÇ¸ç ÀϹÝÀûÀ¸·Î 15,000 ÀÌ»óÀÇ ÇнÀÀÌ ¿ä±¸µÇ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ´Ù¾çÇÑ ³ëµå¼ö¸¦ °¡Áö´Â ½Å°æ¸Á¿¡ ´ëÇÑ ÇнÀÀ» ¼öÇàÇÑ °á°ú, 1¹øÂ° Àº´ÐÃþÀÇ ¼ö°¡ 20°³À̰í 2¹øÂ° Àº´ÐÃþÀÇ ¼ö°¡ 10°³ÀÎ ½Å°æ¸ÁÀÌ 72~98%¿¡ ÇØ´çµÇ´Â Á¤¹Ðµµ¸¦ °¡Áö°í ÇØ´ç Àü´Üº¯Çü·ü°ú ¹Ýº¹È½¼ö¿¡¼­ÀÇ CSR°ªÀ» ¿¹ÃøÇÒ ¼ö ÀÖ¾ú´Ù. ¿©±â¼­ NOC(Number of Cycle)¿Í$D_10$, ($N_1$)$_60$ µîÀÇ ÀԷº¯¼ö°¡ Áö¹ÝÀÇ ¾×»óÈ­ °Åµ¿¿¡ ÁÖ¿äÇÑ ¿µÇâÀÎÀÚ·Î ³ªÅ¸³µ´Ù. ¿¬±¸°á°ú Àΰø½Å°æ¸ÁÀ» ÀÌ¿ëÇÑ Áö¹ÝÀÇ ¾×»óÈ­ °Åµ¿ÀÇ ¿¹ÃøÀÌ ºñ±³Àû Á¤È®ÇÏ°Ô »êÁ¤µÊÀ» ¾Ë ¼ö ÀÖ¾úÀ¸¸ç, CSR°ú ($N_1$)$_60$, NOC¿ÍÀÇ °ü°è°¡ ±âÁ¸ÀÇ ¿¬±¸ °á°ú¿¡ ºÎÇÕÇÏ¿© ³ªÅ¸³²À» ¾Ë ¼ö ÀÖ¾ú´Ù.
Artificial neural networks are efficient computing techniques that are widely used to solve complex problems in many fields. In this paper a liquefaction potential was estimated by using a back propagation neural network model applicated to cyclic triaxial test data, soil parameters and site investigation data. Training and testing of the network were based on a database of 43 cyclic triaxial test data from 00 sites. The neural networks are trained by modifying the weights of the neurons in response to the errors between the actual output values and the target output value. Training was done iteratively until the average sum squared errors over all the training patterns were minimized. This generally occurred after about 15,000 cycles of training. The accuracy from 72% to 98% was shown for the model equipped with two hidden layers and ten input variables. Important effective input variables have been identified as the NOC,$D_10$ and (N$_1$)$_60$. The study showed that the neural network model predicted a CSR(Cyclic shear stress Ratio) of silty-sand reasonably well. Analyzed results indicate that the neural-network model is more reliable than simplified method using N value of SPT
 
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Artificial neural network;Back-propagation;CSR;Liquefaction potential;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.18, no.5, 2002³â, pp.37-42
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921407709)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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