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Çѱ¹µµ·ÎÇÐȸ / v.9, no.3, 2007³â, pp.39-50
¼ÒÇüÇ¥ÁöÆÇ ÁöÁÖ¿Í Â÷·®ÀÇ Ãæµ¹Çؼ®¿¡ °üÇÑ ¿¬±¸
( Study on the Analysis of Vehicle Impact to Small Sign Support )
°í¸¸±â;±è±âµ¿;¼ºÁ¤°ï;À±´ö±Ù; °øÁÖ´ëÇб³ °Ç¼³È¯°æ°øÇкÎ;°øÁÖ´ëÇб³ °Ç¼³È¯°æ°øÇкÎ;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø µµ·Î¿¬±¸ºÎ;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø µµ·Î¿¬±¸ºÎ;
 
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¿øÇü ȤÀº HÇü ´Ü¸éÀÇ Ç¥ÁöÆÇÁöÁÖ¿¡ ¼ÒÇüÂ÷°¡ Ãæµ¹ÇÒ ¶§ Â÷·® ¹× ÁöÁÖÀÇ °Åµ¿À» È®ÀÎÇϱâ À§ÇÏ¿© Barrier VII ÇÁ·Î±×·¥À» ÀÌ¿ëÇÑ ½Ã¹Ä·¹À̼ÇÀ» ½Ç½ÃÇÏ¿´´Ù. ÀÌ ÇÁ·Î±×·¥Àº ¿¬¼º º£¸®¾î¿¡ Ãæµ¹ÇÏ´Â Â÷·®ÀÇ ¿îµ¿°ú º£¸®¾îÀÇ º¯À§¸¦ ÇØ¼®ÇÏ´Â ÇÁ·Î±×·¥À̳ª, ÁöÁÖ¸¦ ¼öÆò ºö ¿ä¼Ò·Î ÇÏ°í °¢ ³ëµå¿¡ °­¼ºÀ» Á¶ÀýÇÑ ±âµÕ ¿ä¼Ò·Î ¿¬°áÇÔÀ¸·Î½á ¼ÒÇüÁöÁÖ¿¡ ´ëÇÑ Ãæµ¹Çؼ®ÀÌ °¡´ÉÇÔÀ» º¸¿´´Ù. 0.9ton ¼ÒÇüÂ÷°¡ ±âÃÊ¿Í °­°áµÈ ÆÄÀÌÇÁÇüÅÂÀÇ ¼ÒÇü ÁöÁÖ¿¡ 30km/h, 60km/h, 70km/h 110km/hÀÇ ¼Óµµ·Î Ãæµ¹ÇÏ´Â °æ¿ì, 0.9ton ¼ÒÇüÂ÷¿Í 1.35ton ÁßÇüÂ÷°¡ ±âÃÊ¿¡ °­°áµÈ HÇü ´Ü¸é ÁöÁÖ¿¡ 110km/hÀÇ ¼Óµµ·Î Ãæµ¹ÇÏ´Â °æ¿ì, ±×¸®°í 0.9ton ¼ÒÇüÂ÷°¡ ºÐ¸®µÇ´Â(slip base) ÇüÅ·Π±âÃÊ¿¡ ¿¬°áµÈ ÆÄÀÌÇÁÇüÅÂÀÇ ¼ÒÇü ÁöÁÖ¿¡ 110km/hÀÇ ¼Óµµ·Î Ãæµ¹ÇÏ´Â °æ¿ì µî ÃÑ 7°¡Áö °æ¿ì¿¡ ´ëÇÑ ½Ã¹Ä·¹À̼ÇÀ» ½Ç½ÃÇÏ¿© ÁöÁÖÀÇ º¯Çü°ú Ãæµ¹Â÷·®ÀÇ °Åµ¿À» ºÐ¼®ÇÏ¿´´Ù. ½Ã¹Ä·¹À̼ÇÀ» ÅëÇÏ¿© °í¼ÓÃæµ¹ ½Ã ±âÃÊ¿¡ °­°á µÈ ¿øÇüÁöÁÖÀÇ °æ¿ì °ú´ÙÇÑ ÈÚ º¯ÇüÀ¸·Î Ç¥ÁöÆÇ°ú Â÷·® Àü¸éºÎ¿ÍÀÇ Ãæµ¹À§Ç輺ÀÌ ÀÖ°í HÇü ÁöÁÖ¿Í °°ÀÌ ºñ±³Àû Å« Ç¥ÁöÆÇ¿ë ÁöÁÖ´Â ¼ÒÇüÂ÷ Ãæµ¹ ½Ã ÁöÁÖÀÇ º¯ÇüÀº °ÅÀÇ ¾ø°í Â÷·®¿¡ °¡ÇØÁö´Â Ãæ°Ý·Â, ÁöÁÖ°¡ °ú´ÙÇÏ°Ô Â÷ü ¾ÈÀ¸·Î ħÅõÇÒ À§Ç輺ÀÌ Å©´Ù´Â »ç½Ç°ú breakaway ÀåÄ¡·Î ´ÜºÎ󸮸¦ ÇÏ´Â °æ¿ì À§ÇèÀÌ ÁÙ¾îµé ¼ö ÀÖÀ½À» È®ÀÎÇÏ¿´´Ù.
Barrier VII program is normally used for the design of flexible barrier, but if modelled properly it can be used for the analysis of vehicle impact to small sign posts. In this paper sign post is shown to be modelled as flexible barrier by combining beam and column elements at each beam node. Simulations with the Barrier VII program have been made for 7 impact cases composed of sign posts of circular and H section with rigidly connected support and breakaway support system. The impact speed used for the simulation ranged from 30km/h to 110km/h. The study shows that in the vehicle impacts to a circular sign post with high speed, the large deflection and high inertia force causes the sign plate to hit the windshield leading to a hazard to the occupants. It is also shown that impact to H section post results in small deflection of the post and abrupt velocity change and high deceleration of the impact vehicle causing severe damage to both the vehicle and occupants. Simulation study also shows that breakaway support system eliminates the potential danger of the vehicle impact to the rigidly connected small sign posts by reducing deflection of the post, abrupt change in velocity and deceleration level.
 
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¼ÒÇüÁøÁÖ;Ãæµ¹Çؼ®;breakaway ÁöÁִܺÎ;small sign support;impact analysis;breakaway support;barrier VII;
 
Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.9, no.3, 2007³â, pp.39-50
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200735836675233)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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