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Çѱ¹Áö¹Ý°øÇÐȸ / v.24, no.1, 2008³â, pp.119-130
È®·üº¯¼öÀÇ ºÐÆ÷Ư¼ºÀ» °í·ÁÇÑ ¾èÀº±âÃÊ ½Å·Ú¼º ¼³°è
( Reliability-Based Design of Shallow Foundations Considering The Probability Distribution Types of Random Variables )
±è⵿;±è¼öÀÏ;ÀÌÁØÈ¯;±èº´ÀÏ; (ÁÖ)ÀÌÁ¦ÀÌÅØ Åä¸ñ¼³°èºÎ;¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;(ÁÖ)ÀÌÁ¦ÀÌÅØ ±â¼ú¿¬±¸¼Ò;
 
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¾èÀº±âÃÊ ¼³°è½Ã ÀÌ¿ëµÇ´Â Áö¹ÝÀÇ ¹°¸®Àû °øÇÐÀû ¼³°èº¯¼öµéÀº °íÀ¯º¯µ¿¼º(inherent variability) ¹× ÃøÁ¤ ¿ÀÂ÷(measurement error) µî°ú °°Àº ¿©·¯ °¡Áö ¿äÀÎÀ¸·Î ÀÎÇÏ¿© ºÒÈ®½Ç¼ºÀÌ ÇÊ¿¬ÀûÀ¸·Î ³»Æ÷µÇ¾î ÀÖ´Ù. º» ³í¹®¿¡¼­´Â ¾èÀº±âÃÊ ¼³°è½Ã ±âÁ¸ÀÇ °áÁ¤·ÐÀû ¹æ¹ý¿¡¼­ °í·ÁÇÏÁö ¸øÇÏ´Â Áö¹Ý ºÒÈ®½Ç¼º µîÀ» Æ÷ÇÔÇÑ ¼³°è ÆÄ¶ó¹ÌÅÍÀÇ ºÐ»êÀ» °í·ÁÇÒ ¼ö ÀÖ´Â È®·ü·ÐÀû ¹æ¹ýÀÇ ½Å·Ú¼º ¼³°è »ç·Ê¸¦ Á¦½ÃÇÏ¿´´Ù. ±ØÇÑÁöÁö·Â »êÁ¤½Ã È®·üº¯¼ö(random variable)ÀÎ ´ÜÀ§Áß·®, Á¡Âø·Â ¹× ³»ºÎ¸¶Âû°¢ ±×¸®°í ħÇÏ·® »êÁ¤½Ã ź¼º°è¼ö¿¡ ´ëÇÏ¿© ±¹³» Áö¹Ý¿¡ ´ëÇÑ ÀûÁ¤ È®·üºÐÆ÷ ÇüÅ ¹× Åë°èÀû Ư¼ºÄ¡¸¦ °áÁ¤ÇÏ¿´´Ù. °¢ È®·üº¯¼öº°·Î äÅÃµÈ ºÐÆ÷¸¦ Àû¿ëÇÏ¿© ÁöÁö·Â°ú ħÇÏ·®¿¡ °üÇÑ ½Å·ÚÁö¼ö¿Í ÆÄ±«È®·üÀ» °áÁ¤ÇÏ¿´À¸¸ç, ¸ñÇ¥ ½Å·ÚÁö¼ö ¶Ç´Â È®·ü¿¡ ´ëÇÑ ±âÃÊÆøÀ» °áÁ¤ÇÏ¿´´Ù. ¾èÀº±âÃÊÀÇ ½Å·Ú¼º ¼³°è¿¡ À־ Á¤±ÔºÐÆ÷ÀÇ ÀϰýÀû Àû¿ëº¸´Ù´Â °¢ È®·üº¯¼ö¿¡ ÇØ´çÇÏ´Â ÀûÇÕÇÑ ºÐÆ÷ÇüŸ¦ Àû¿ë, ºÐ¼®ÇÏ´Â °ÍÀÌ ¹Ù¶÷Á÷ÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù.
Uncertainties in physical and engineering parameters for the design of shallow foundations arise from various aspects such as inherent variability and measurement error. This paper aims at investigating and reducing uncertainty from deterministic method by using the reliability-based design of shallow foundations accounting for the variation of various design parameters. A probability distribution type and statistics of random variables such as unit weight, cohesion, infernal friction angle and Young's modulus in geotechnical engineering are suggested to calculate the ultimate bearing capacities and immediate settlements of foundations. Reliability index and probability of failure are estimated based on the distribution types of random variables. Widths of foundation are calculated at target reliability index and probability of failure. It is found that application and analysis of the best-fit distribution type for each random variables are more effective than adoption of the normal distribution type in optimizing the reliability-based design of shallow foundations.
 
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Probability distribution type;Random variable;Reliability-based design;Shallow foundation;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.24, no.1, 2008³â, pp.119-130
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200810737054659)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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ȸ»ç¼Ò°³ ±¤°í¾È³» ÀÌ¿ë¾à°ü °³ÀÎÁ¤º¸Ãë±Þ¹æÄ§ Ã¥ÀÓÀÇ ÇѰè¿Í ¹ýÀû°íÁö À̸ÞÀÏÁÖ¼Ò ¹«´Ü¼öÁý °ÅºÎ °í°´¼¾ÅÍ
   

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