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Çѱ¹¼öÀÚ¿øÇÐȸ / v.43, no.11, 2010³â, pp.967-976
ÆÄ±«È®·ü°ú ´ÙÁ߯ı«À¯ÇüÀ» ÀÌ¿ëÇÑ ¿ì¼ö°üÀÇ ¾ÈÀü¼º ºÐ¼®
( Safety Analysis of Storm Sewer Using Probability of Failure and Multiple Failure Mode )
±ÇÇõÀç;ÀÌöÀÀ; ûÁÖ´ëÇб³ Åä¸ñȯ°æ°øÇаú;°­¿ø´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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¿ì¼ö°üÀÇ ¼º´ÉÀÌ ÇѰè»óÅÂ(performance limit state)¿¡ µµ´ÞÇÒ È®·üÀ» Á¤·®ÀûÀ¸·Î »êÁ¤ÇÒ ¼ö ÀÖ´Â FORM(First-Order Reliability Model)ÀÇ AFDA(Approximate Full Distribution Approach) ½Å·Ú¼º ¸ðÇüÀ» °³¹ßÇÏ¿´´Ù. ¿ì¼ö°ü¸Á¿¡¼­ °¢°¢ÀÇ °üÀ¸·Î À¯ÀÔÇÏ´Â À¯·®ÀÌ ±× °üÀÇ Çã¿ë °¡´É ¹èÃâ·®À» ÃʰúÇÏ¿© ¼º´ÉÇѰè»óÅ¿¡ µµ´ÞÇÒ ¶§ À̸¦ ÆÄ±«»óÅÂ(failure state)¶ó Á¤ÀÇÇÏ¿© ½Å·ÚÇÔ¼ö¸¦ ¼ö¸³ÇÏ¿´´Ù. ¿ì¼ö°ü°Å·ÎÀÇ À¯ÀÔ·®Àº ÇÕ¸®½Ä, À¯Ãâ·®Àº ManningÀÇ °ø½ÄÀ» Àû¿ëÇÏ¿´´Ù. ¶ÇÇÑ ½Å·Ú¼º ÇØ¼®À» À§ÇÑ °ü·Ã È®·üº¯¼öµé¿¡ ´ëÇÑ Åë°èÀû Ư¼º°ú ºÐÆ÷ÇÔ¼ö¿¡ ´ëÇÑ ÇØ¼®ÀÌ ¼öÇàµÇ¾ú´Ù. °­¿ìÀÚ·áÀÇ ºÒÈ®½Ç¼º ÇØ¼®¿¡¼­ ¿ì¸®³ª¶ó ¿©·¯ Áß¼Òµµ½Ã¿¡ ´ëÇÑ ¿¬ ÃÖ´ë°­¿ì°­µµÀÇ È®·üºÐÆ÷°¡ Gumbel ±ØÄ¡ºÐÆ÷ÇÔ¼ö¿Í ÀÏÄ¡ÇÔÀ» È®ÀÎÇÏ¿´´Ù. °³¹ßµÈ ½Å·Ú¼º ¸ðÇüÀ» YÀÚÇü ¿ì¼ö°ü¸Á¿¡ Àû¿ëÇÏ¿© ¼º´ÉÇѰè»óŰ¡ ¹ß»ýÇÒ È®·ü, Áï ÆÄ±«È®·ü(probability of failure)À» Á¤·®ÀûÀ¸·Î »êÁ¤ÇÏ¿´´Ù. ManningÀÇ °ø½ÄÀ» ÀÌ¿ëÇÏ¿© ¿ì¼ö°üÀÇ Á÷°æ º¯È­¿¡ µû¸¥ ÆÄ±«È®·üÀÇ °Åµ¿Æ¯¼ºÀ» ºÐ¼®ÇÏ¿´´Ù. ƯÈ÷ ¹®°æ°ú ´ëÀüÀÇ 50³â ÀçÇö±â°£À» °®´Â ¼³°è °­¿ì°­µµ¿¡ ´ëÇÑ ¿ì¼ö°üÀÇ ÆÄ±«È®·üÀ» »êÁ¤ÇÑ °á°ú¿¡ ÀÇÇϸé, °üÀÇ Á÷°æÀÌ Æ¯Á¤¼öÄ¡ ÀÌÇÏÀÏ °æ¿ì ÆÄ±«È®·üÀÌ ±Þ°ÝÈ÷ Ä¿Áö´Â °ÍÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù. ÀÌ´Â ½ÇÁ¦ ¿ì¼ö°üÀÇ À¯È¿Á÷°æÀÌ ¼³°èÁ÷°æ¿¡ °¡±õµµ·Ï Ç×»ó °ü³» ºÒ¼ø¹°À» Á¦°ÅÇÏ´Â °ÍÀÌ ÆÄ±«È®·üÀ» ÁÙÀÌ´Â ÃÖ¼±ÀÇ ¹æ¹ýÀÓÀ» ÀǹÌÇÏ´Â °ÍÀÌ´Ù. ¶ÇÇÑ ¿ì¼ö°ü ½Ã½ºÅÛÀÇ °æ¿ì ¿©·¯ °³ÀÇ °üÀÌ ¸ð¿© ÇϳªÀÇ °üÀ¸·Î Èê·¯ µé¾î°¡´Â °æ¿ì°¡ ¸¹À¸¸ç ÀÌ °æ¿ì ´ÙÁ߯ı«À¯Çü(multiple failure mode)À» Àû¿ëÇÏ¿© ½Ã½ºÅÛÀÌ ÆÄ±«»óÅ¿¡ µµ´ÞÇÒ È®·üÀ» Á¤·®ÀûÀ¸·Î »êÁ¤ÇÏ¿´´Ù. º» ¿¬±¸¿¡¼­ °³¹ßµÈ ½Å·Ú¼º ¸ðÇüÀº ¿ì¼ö°üÀÇ ¿î¿ë, °ü¸®, °¨µ¶Àº ¹°·Ð ¼³°è¿¡ Ȱ¿ëÀÌ °¡´É ÇÒ °ÍÀÌ´Ù.
AFDA (Approximate Full Distribution Approach) model of FORM (First-Order Reliability Model) which can quantitatively calculate the probability that storm sewer reach to performance limit state was developed in this study. It was defined as a failure if amount of inflow exceed the capacity of storm sewer. Manning's equation and rational equation were used to determine the capacity and inflow of reliability function. Furthermore, statistical characteristics and distribution for the random variables were analyzed as a reliability analysis. It was found that the statistical distribution for annual maximum rainfall intensity of 10 cities in Korea is matched well with Gumbel distribution. Reliability model developed in this study was applied to Y shaped storm sewer system to calculate the probability that storm sewer may exceed the performance limit state. Probability of failure according to diameter was calculated using Manning's equation. Especially, probability of failure of storm sewer in Mungyeong and Daejeon was calculated using rainfall intensity of 50-year return period. It was found that probability of failure can be significantly increased if diameter is decreased below the original diameter. Therefore, cleaning the debris in sewer pipes to maintain the original pipe diameter should be one of the best ways to reduce the probability of failure of storm sewer. In sewer system, two sewer pipes can flow into one sewer pipe. For this case, probability of system failure was calculated using multiple failure mode. Reliability model developed in this study can be applied to design, maintenance, management, and control of storm sewer system.
 
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´ÙÁ߯ı«À¯Çü;¼º´ÉÇѰè»óÅÂ;ÆÄ±«È®·ü;½Å·Ú¼º ¸ðÇü;¿ì¼ö°ü;multiple failure mode;performance limit state;probability of failure;reliability model;storm sewer;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.43, no.11, 2010³â, pp.967-976
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201001039068359)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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