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Çѱ¹µµ·ÎÇÐȸ / v.9, no.4, 2007³â, pp.11-20
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Æ÷Àå°¡¼Ó½ÃÇèÀ» ÀÌ¿ëÇÑ ¾Æ½ºÆÈÆ® ¾ÈÁ¤Ã³¸®ÃþÀÇ ÇǷθðÇü °³¹ß
( Development of Fatigue Model for Asphalt Black Base by Accelerated Pavement Testing ) |
| ¿©Àμö;¼¿µÂù;¹®¼ºÈ£; Çѱ¹µµ·Î±³ÅëÇùȸ;ÇѾç´ëÇб³ ±³Åë°øÇаú;Çѱ¹µµ·Î°ø»ç µµ·Î±³Åë±â¼ú¿ø;
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| º» ³í¹®¿¡¼´Â Æ÷Àå°¡¼Ó½ÃÇè±â¸¦ ÀÌ¿ëÇÏ¿© ¾Æ½ºÆÈÆ® ¾ÈÁ¤Ã³¸®ÃþÀÇ ÇǷθðÇüÀ» °³¹ßÇÏ¿© ±âÁ¸ÀÇ ½Ç³»½ÇÇè°á°ú¿ÍÀÇ »ó°ü°ü°è¸¦ ºÐ¼®ÇÏ¿´´Ù. ¾Æ½ºÆÈÆ® ¾ÈÁ¤Ã³¸®ÃþÀÇ ÇǷθðÇüÀº Miner(1945)ÀÇ ´©ÀûÆÄ¼Õ(Cumulative Damage)°¡¼³À» Àû¿ëÇÏ¿´´Ù. Æ÷Àå°¡¼Ó½ÃÇè¿¡ »ç¿ëµÈ ¾Æ½ºÆÈÆ® ¾ÈÁ¤Ã³¸®ÃþÀº °ñÀçÃÖ´ëÀÔ°æ 25mm(BB-3)ÀÇ Àç·á¸¦ »ç¿ëÇÏ¿´´Ù. Æ÷Àå°¡¼Ó½ÃÇè°á°ú ÇǷθðÇüÀÇ º¯¼öÀÎ Æ÷ÀåÇϺÎÀÇ ÃÖ´ëÀÎÀåÀÀ·ÂÀº ÇÏÁßÀçÇÏȸ¼ö°¡ Áõ°¡ÇÒ¼ö·Ï Áõ°¡ÇÏ´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾úÀ¸¸ç Æ÷ÀåÃþÀÇ Åº¼º°è¼ö´Â Á¡Â÷ ÀÛ¾ÆÁö´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. ¾Æ½ºÆÈÆ® ÇǷθðÇüÀÇ ±âº»½Ä $N_f=k_1(frac{1}{epsilon})^{k_2}$¿¡¼ º¯Çü·ü°è¸¦ ÅëÇÏ¿© ¾òÀº ÀÎÀ庯Çü·üÀ» ÅëÇÏ¿© $k_1=1.29{ imes}10^{-6}$, $k_2=3.02$ÀÇ °ªÀ» µµÃâÇÏ¿´À¸¸ç, °°Àº ÀÎÀ庯Çü·ü¿¡¼ÀÇ ÇǷμö¸íÀº ½Ç³»½ÇÇèÀ» ÅëÇÑ ¸ðÇüº¸´Ù Å©°Ô ³ªÅ¸³µ´Ù. ¶ÇÇÑ, ºñÆÄ±«½ÇÇèÀÎ FWD¸¦ ÀÌ¿ëÇÏ¿© Æ÷ÀåÀÇ ÀÜÁ¸¼ö¸íÀ» ÃßÁ¤ÇÏ´Â ³í¸®¸¦ °³¹ßÇÏ¿´´Ù. |
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| This thesis develops a fatigue model for the asphalt black base using the APT(Accelerated Pavement Testing) and analyzes the correlation of the APT analysis result with results of previous laboratory tests. For the APT testing, aggregate of the maximum grain size of 25mm(BB-3) was used as the material for the asphalt black base. The result of the APT revealed that the variable of the fatigue model, i.e. the maximum tensile stress on the bottom part of the pavement, increased as the number of loading increased while the modulus of elasticity for the pavement layer decreased gradually. The tensile strain was obtained from a strain gauge, and it was used to derive the values of $k_1=1.29{ imes}10^{-6}$ and $k_2=3.02$ from the basic equation of the asphalt fatigue model, $N_f=k_1(frac{1}{epsilon})^{k_2}$. The fatigue life predicted from the asphalt fatigue model was greater than that obtained from laboratory experiments, given the same tensile strain. Additionally, a theory to estimate the remaining life of the pavement was developed using FWD, a non-destructive experiment. |
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| Æ÷Àå°¡¼Ó½ÃÇè;¾Æ½ºÆÈÆ® ÇǷθðÇü;ÀÜÁ¸¼ö¸í;accelerated pavement testing;fatigue model;FWD;remaining life; |
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.9, no.4, 2007³â, pp.11-20
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200706414147666)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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