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Çѱ¹µµ·ÎÇÐȸ / v.11, no.1, 2009³â, pp.187-194
±âÃþÀÇ À̹漺 °Åµ¿ÀÌ ¾Æ½ºÆÈÆ® µµ·Î ¼³°è¼ö¸í¿¡ ¹ÌÄ¡´Â ¿µÇâ
( Influence of Anisotropic Behavior of Aggregate Base on Flexible Pavement Design Life )
±è¼ºÈñ; ¹Ì±¹ Southern Polytechnic State University °ø°ú´ëÇÐ °Ç¼³°øÇаú;
 
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ÀÌ ³í¹®¿¡¼­´Â ¾Æ½ºÆÈÆ® µµ·Î ¼³°è¿¡ ÇÊ¿äÇÑ ±âÃþ°ñÀç Àç·áÀÇ ºñ¼±Çü À̹漺À» °í·ÁÇÑ ¿¬°áÇÔ¼ö¸¦ °³¹ßÇÏ¿´´Ù. ±âÃþÀÌ ºñ¼±Çü À̹漺 °Åµ¿À¸·Î ÇØ¼®µÇ¾îÁ³À» °æ¿ì, ¼±Çü µî¹æ¼º °Åµ¿À¸·Î ÇØ¼®µÇ¾îÁú ¶§ ³ªÅ¸³ª´Â ±âÃþ ÇϺγ»ÀÇ ÀÎÀå·ÂÀ» °¨¼Ò½ÃÄÑ º¸´Ù Çö½ÇÀûÀÎ ÀÀ·ÂºÐÆ÷¸¦ º¸ÀÌ°Ô µÈ´Ù. ±×·¯³ª ÇöÀç±îÁö °³¹ßµÈ ¿¬°áÇÔ¼öµéÀº ´ëºÎºÐ ±âÃþÀÌ ¼±Çü µî¹æ¼º °Åµ¿À¸·Î ÇØ¼®ÇÏ¿© °³¹ßµÈ °ÍÀ̹ǷÎ, ºñ¼±Çü À̹漺 °Åµ¿À» ±Ù°£À¸·Î ÇÏ´Â ¿¬°áÇÔ¼öÀÇ °³¹ßÀÌ Çö½ÇÀûÀÎ µµ·Î ¼³°è¸¦ À§ÇØ ÇÊ¿äÇÏ´Ù. ÀÌ ³í¹®¿¡¼­ °³¹ßµÈ ¿¬°áÇÔ¼ö¸¦ ÀÌ¿ëÇÏ¿© µµ·Î¸¦ ¼³°èÇÑ °á°ú AASHTOÀÇ ¿¬°áÇÔ¼ö¸¦ ÀÌ¿ëÇÏ¿© ¼³°èÇßÀ» °æ¿ìº¸´Ù, ±âÃþ µÎ²²°¡ 25mm °¨¼ÒµÇ´Â °á°ú¸¦ º¸¿´À¸¸ç, ÀÌ´Â AASHTO µµ·Î ¼³°è°¡ º¸¼öÀûÀÎ ¼³°è¶ó´Â °ÍÀ» ÀÔÁõÇÏ¿´´Ù.
This paper presents the development of transfer function accounting for cross-anisotropic behavior of aggregate base material for the pavement thickness design. The stress distributions predicted by nonlinear cross-anisotropic finite element program were realistic by eliminating excessive tensile stress at the bottom of the base layer and the critical pavement responses predicted by nonlinear cross-anisotropic model are higher than those predicted by linear or nonlinear isotropic models (Kim, 2004, Kim et at., 2005). Since the previously developed transfer functions such as Asphalt Institute and Chevron models, etc. were based on the critical responses obtained from linear isotropic model, those equations are not appropriate for the thickness design nonlinear cross-anisotropic base behavior. Therefore, the development of usable transfer functions for nonlinear cross-anisotropic model is ever more important. When the newly developed transfer functions were compared with AASHTO method for the thickness design, the newly developed transfer functions produce approximately 25mm reduced UAB thickness in AASHTO thickness design and this illustrates that linear isotropic model results in more conservative pavement design.
 
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±âÃþ;À̹漺;À¯ÇÑ¿ä¼Ò¹ý;unbound aggregate base;anisotropy;finite element method;
 
Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.11, no.1, 2009³â, pp.187-194
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200911850421616)
¾ð¾î : ¿µ¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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