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Çѱ¹Áö¹Ý°øÇÐȸ / v.11, no.1, 1995³â, pp.9-22
½Å·Úµµ¿¡ ±Ù°ÅÇÑ ¸»¶ÒÀÇ ÁöÁö·Â Æò°¡
( Reliability Based Pile Bearing Capacity Evaluation )
ÀÌÀθð;Á¶±¹È¯;ÀÌÁ¤ÇÐ; °í·Á´ëÇб³ Åä¸ñȯ°æ°øÇаú;µ¿ºÎ°Ç¼³(ÁÖ), °í·Á´ëÇб³ ºÎ¼³ »ý»ê±â¼ú¿¬±¸¼Ò;;
 
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º» ¿¬±¸ÀÇ ¸ñÀûÀº ½Å·ÚµµÇؼ®¿¡ ±Ù°ÅÇÑ ¸»¶ÒÀÇ ¿©·¯°¡Áö ÁöÁö·Â ¿¹Ãø¹æ¹ýµéÀÇ ¾ÈÀüÀ²À» Á¦½ÃÇϴµ¥ ÀÖ´Ù. °¢ ÁöÁö·Â °áÁ¤¹æ¹ýµéÀº ¿©·¯°¡Áö ºÒÂø½Ç¼ºÀ» Æ÷ÇÔÇϰí ÀÖÀ¸¸ç, ÀÌ·¯ÇÑ ¿ÀÂ÷¸¦ °í·ÁÇϱâ À§ÇØ ¸»¶ÒÀçÇϽÃÇè¿¡ ÀÇÇØ ÃøÁ¤µÈ ÁöÁö·Â°ú ¿¹ÃøµÈ ÁöÁö·Â°úÀÇ ºñ¸¦ ºÐÆ÷ÇÔ¼ö·Î Ç¥ÇöÇÒ ¼ö ÀÖ´Ù. ÀÌ ºÐÆ÷ÇÔ¼ö¸¦ ÀÌ¿ëÇÏ¿© ÆÄ±«È®·üÀÌ 10-3ÀÌÇϰ¡ µÉ ¼ö ÀÖ´Â ¸»¶ÒÁöÁö·ÂÀÇ ¾ÈÀüÀ²À» »êÁ¤ÇÒ ¼ö ÀÖ´Ù. Bayes' ÀÌ·ÐÀÇ Àû¿ëÀº Á¤¿ªÇÐÀû ÁöÁö·Â °ø½ÄÀ» Prior DistributionÀ¸·Î °¡Á¤ÇÏ°í µ¿¿ªÇÐÀû ÁöÁö·Â °ø½Ä ¹× WEAP, PDA¸¦ ÀÌ¿ëÇØ »êÁ¤µÈ ÁöÁö·ÂÀÇ ºÐÆ÷¸¦ Likelihood DistributionÀ¸·Î °¡Á¤ÇÏ¿© Àû¿ëÇÔÀ¸·Î½á ¸¹Àº ºÒÈ®½Ç¼ºÀ» ÁÙÀÏ ¼ö ÀÖ°Ô µÈ´Ù. º» ¿¬±¸°á°ú¿¡¼­ º¸¸é µ¿¿ªÇÐÀû ÁöÁö·Â °ø½ÄÀÇ ¾ÈÀüÀ²Àº ´ë·« 7.4 Á¤µµ·Î S.P.T.¸¦ ÀÌ¿ëÇØ »êÁ¤µÈ ÁöÁö·Â°ú ÇÔ²² ºÒÈ®½Ç¼ºÀÌ Å©¸ç, ÆÄµ¿¹æÁ¤½ÄÀ» ÀÌ¿ëÇÑ ÁöÁö·Â °áÁ¤¹æ¹ýÀÎ PDA¿¡ ÀÇÇØ »êÁ¤µÈ ÁöÁö·ÂÀÇ ¾ÈÀüÀ²Àº ¾à 2.7Á¤µµ·Î °¡Àå ½Å·Úµµ°¡ ³ôÀ½À» ¾Ë ¼ö ÀÖ´Ù. ¶ÇÇÑ Bayes' ÀÌ·ÐÀ» Àû¿ëÇÏ¿© º» °á°ú ¾ÈÀüÀ²À» ÁÙÀÏ ¼ö ÀÖ¾úÀ¸¸ç ¸»¶ÒÀÇ ÁöÁö·Â »êÁ¤½Ã ÀÌÀÇ ÀÀ¿ëÀº ÃÖÀû¼³°èÀÇ °üÁ¡¿¡¼­ ¸¹Àº µµ¿òÀ» ÁÙ ¼ö ÀÖÀ» °ÍÀÌ´Ù.
The purpose of this study is to propose safety factors of pile bearing capacity based on the reliability analysis. Each prediction method involves various degrees of uncertainties. To account for these uncertainties in a systematic way, the ratios of the measured bearing capacity from pile load tests to the predicted bearing capacity are represented in the form of a probability density function. The safety factor for each design method is obtained so that the probability of pile foundation failure is less than 10-3. The Bayesian theorem is applied in a way that the distribution using static formulae is assumed to be the A-prior and the distribution using dynamic formulae or wave equation based methods is assumed to be the likelihood, and these two are combined to obtain the posterior which has the reduced uncertainty. The results of this study show that static formulae of the pile bearing capacity using the 5.p.7. N-value as well as dynamic formulae are highly unreliable and have to have the safety factor more than 7.4 : the wave equation analysis using PDA(Pile Driving Analyzer) system the most reliable with the safety factor close to 2.7. The safety factor could be reduced certain amount by adoption the Bayes methodology in pile design.
 
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Çѱ¹Áö¹Ý°øÇÐȸÁö:Áö¹Ý / v.11, no.1, 1995³â, pp.9-22
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-215X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511920445822)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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