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Çѱ¹Áö¹Ý°øÇÐȸ / v.24, no.5, 2008³â, pp.27-35
Áö¹Ý½Å·Ú¼º ¼³°è¸¦ À§ÇÑ ¼³°èº¯¼öÀÇ Æ¯¼ºÄ¡ ¿¬±¸
( Characteristic Values of Design Parameters for Geotechnical Reliability Design )
À±±æ¸²;À±¿©¿ø;±èÈ«¿¬; Çѱ¹Çؾ翬±¸¿ø Ç׸¸.¿¬¾È°ø°£¿¬±¸»ç¾÷´Ü;¾ÈÇÏ´ëÇб³ Åä¸ñ°øÇаú;Çѱ¹Çؾ翬±¸¿ø Ç׸¸.¿¬¾È°ø°£¿¬±¸»ç¾÷´Ü;
 
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½Å·Ú¼º ¼³°è¸¦ À§ÇÑ ¼³°èº¯¼öÀÇ Æ¯¼ºÄ¡¿¡ ´ëÇÏ¿© ±¹³» ÇØ¾çÅäÁúÀ» ÀÌ¿ëÇÏ¿© ¿¬±¸ÇÏ¿´´Ù. Ư¼ºÄ¡ »êÁ¤¿¡ ´ëÇÑ ¿¬±¸°á°ú, Student/Ovesen, Schneider ¹× EN 1990 ¹æ¹ýÀÇ ¼øÀ¸·Î Æò±ÕÄ¡¿¡ ±ÙÁ¢ÇÑ °ÍÀ¸·Î ³ªÅ¸³µ°í, EN 1990 ¹æ¹ýÀº Áö¹ÝƯ¼ºÄ¡ »êÁ¤¹æ¹ýÀÇ ½Å·Ú¼º Â÷¿ø¿¡¼­ ºÎÀûÇÕÇÑ °ÍÀ» È®ÀÎÇÏ¿´´Ù. ±×¸®°í Á¦½ÃµÈ ³×°¡Áö Ư¼ºÄ¡ »êÁ¤¹æ¹ýÀº ÅäÁúÀÇ º¯µ¿¼ºÀÌ Ä¿Áü¿¡ µû¶ó Ư¼ºÄ¡¸¦ º¸¼öÀûÀ¸·Î Æò°¡ÇÏ´Â °æÇâÀ» º¸¿´´Ù. ¶ÇÇÑ ÀÌ·¯ÇÑ »êÁ¤µÈ Ư¼ºÄ¡°¡ ½Ç ¼³°è¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ÆÄ¾ÇÇϱâ À§ÇÏ¿© ¹æÆÄÁ¦¿¡ ´ëÇÏ¿© ÀÓÀÇ ÇÏÁßÇÏ¿¡¼­ ¹Ì°³·® Áö¹ÝÀÇ ÁöÁö·Â ¹× ħÇÏÆ¯¼ºÀ» °ËÅäÇÏ¿´´Ù. Schneider ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿© »êÁ¤ÇÑ °á°ú¿Í ÅäÁúÁ¤¼öÀÇ »ê¼úÆò±ÕÄ¡¸¦ ÀÌ¿ëÇÑ °á°ú¸¦ ºñ±³ÇÑ °á°ú, Çã¿ëÁöÁö·Â/ÀÛ¿ëÇÏÁߺñÀÇ °æ¿ì ÀüÀÚ°¡ ÈÄÀÚÀÇ 65%·Î ³ªÅ¸³µ°í, ħÇÏ·®ÀÇ °æ¿ì¿¡´Â 13.6%¸¦ Á¦½ÃÇÏ¿© °ú¼ÒÆò°¡ÇÑ °á°ú¿´´Ù. ±×¸®°í °ú°Å ¼³°è»ç·Ê¿¡¼­ »ê¼úÆò±ÕÄ¡·Î °áÁ¤µÈ ´ëǥġ¿¡ ÀÇÇÑ °Í°ú º» ³í¹®¿¡¼­ °¢ Áö¿ªÀÇ ÀÚ·á·ÎºÎÅÍ »êÁ¤ÇÑ Æ¯¼ºÄ¡¿¡ µû¸¥ ¼³°è°á°ú¸¦ ºñ±³ÇÑ °á°ú, »ê¼úÆò±ÕÄ¡·Î °áÁ¤µÈ ´ëǥġ¿¡ ÀÇÇÑ ¼³°è´Â ´ëºÎºÐ °ú´ëÆò°¡ÀÇ °á°ú¸¦ Á¦½ÃÇÏ¿´´Ù.
Geotechnical characteristic values for reliability-based design were analyzed using domestic marine clays. Analysis results indicate that there were close to mean values in oder of Student/Ovesen, Schneider and EN 1990's approach. However, it was found that the EN 1990's approach is inappropriate far estimating geotechnical characteristic value due to low reliability of estimation results. Four approaches had a trend of evaluating characteristic value conservatively with increasing of soil variability. Also, stability and settlement of breakwater subjected to nominal stress with unimproved soft grounds were computed to investigate the effects of estimated characteristic values. In case of using the Schneider's approach, the ratio of allowable bearing capacity/acting loads suggested 65% of that obtained from using the arithmetic mean approach, and showed underestimated value of 13.6% of the settlement obtained from the latter. The comparison of case designs using a representative value from arithmetic mean approach with the proposed approaches, using characteristic value showed that the former was mostly overestimated.
 
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Characteristic value;Eurocode 7;LRFD;Marine clay;Reliability-based design;Variability;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.24, no.5, 2008³â, pp.27-35
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200816256327218)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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