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Çѱ¹µµ·ÎÇÐȸ / v.10, no.2, 2008³â, pp.81-89
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( Stiffness Test of Dowel Bar for fainted Concrete Pavement ) |
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| º» ¿¬±¸¿¡¼´Â ÄÜÅ©¸®Æ®Æ÷ÀåÀÇ µðÀ£¹Ù Àü´Ü½ÃÇè ÀýÂ÷¿Í ½ÇÇè°á°ú¸¦ ÀÌ¿ëÇÏ¿© PC ½ºÇÁ·¹µå½ÃÆ®¿¡¼ ´ÙÀ£¹ÙÀÇ ÁöÁö·Â°è¼ö¿Í Àü´Ü ½ºÇÁ¸µ °¼º°è¼ö¸¦ »êÁ¤ÇÏ´Â ÀýÂ÷¸¦ Á¦½ÃÇÏ¿´´Ù. ¼¼ °³ÀÇ ½ÃÇèü¸¦ ÅëÇØ AASHTOÀÇ ´ÙÀ£¹Ù Àü´Ü½ÃÇèÀ» ¼öÇàÇÏ¿© ÄÜÅ©¸®Æ® Æ÷ÀåÀÇ ºÒ¿¬¼Ó¸é¿¡¼ÀÇ Àü´Ü°Åµ¿À» ¸ð»çÇÏ¿´´Ù. ¿¹ºñ½ÇÇèÀ» ÅëÇØ ¹ß»ýÇÑ ºñƲ¸² º¯ÇüÀ» ÃÖ¼ÒÈÇϱâ À§ÇØ Ãø¸é °íÁ¤´ë »ç¿ëÇÏ¿© ½ÇÇèÇÏ¿´´Ù. ÃʱâÇÏÁß¿¡¼ÀÇ ÇÏÁßÀÇ ÀçÇÏ(loading), Á¦ÇÏ(unloading), ÀçÀçÇÏ(reloading)¸¦ ¹Ýº¹¼öÇàÇÑ °á°ú ź¼ºÀûÀÎ °Åµ¿À» º¸¿©ÁØ´Ù. ±×·¯³ª Àüü ÇÏÁß ¹üÀ§¿¡¼´Â ´ÙÀ£¹ÙÀÇ ÁöÁö·Â°è¼ö ¶Ç´Â Àü´Ü ½ºÇÁ¸µ °¼º°è¼ö´Â ½½·¡ºêÀÇ »ó´ë óÁü ¶Ç´Â ÀçÇÏÇÏÁß¿¡ µû¶ó ºñ¼±ÇüÀ¸·Î °Åµ¿ÇÔÀ» º¸¿©ÁØ´Ù. º» ½ÇÇè¿¡¼ ¾ò¾îÁø ´ÙÀ£ÀÇ ÁöÁö·Â°è¼ö´Â 550-880GN/m3À¸·Î¼ Yoder¿Í WitczakÀÌ Á¦¾ÈÇÏ´Â 407GN/m3º¸´Ù´Â 1.4-2.2¹è°¡ Å©°Ô »êÁ¤µÇ¾ú´Ù. ÀÌ´Â Ãø¸é °íÁ¤´ë¸¦ »ç¿ëÇÔÀ¸·Î¼, ½ÇÇè½Ã ¿¹»óµÇ´Â ºñƲ¸² º¯ÇüÀÌ ±âÁ¸ÀÇ ½ÇÇè¿¡ ºñÇØ Àû¾ú´ø °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. º» ½ÇÇè¿¡¼ ¾ò¾îÁø ´ÙÀ£ÀÇ ÁöÁö·Â°è¼ö ¶Ç´Â Àü´Ü ½ºÇÁ¸µ °¼º°è¼ö´Â ´ÙÀ£¹Ù¸¦ ÀÌ¿ëÇÑ ÄÜÅ©¸®Æ® ºÒ¿¬¼Ó¸éÀÇ ±¸Á¶Çؼ® ½Ã Âü°íÀÚ·á·Î Ȱ¿ëµÉ ¼ö ÀÖ´Ù. |
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| Shear test procedure for concrete-dowel interaction was proposed along with determination of dowel support reaction factor or shear spring stiffness constant using the spreadsheet example. For this task, three AASHTO-type standard specimens were prepared to simulate behavior of the jointed concrete pavement. A side support system was adopted to minimize twisting of the test specimen which had been observed in a preliminary test. A typical elastic behavior of the dowel-concrete interaction was observed from several test loops of loading, unloading and reloading procedures. However load versus slab displacement represents to be nonlinear. Test results show that the dowel support reaction factor ranges from 550-880 GN/m3, which is 1.4-2.2 times greater than 407GN/m3 proposed by Yoder and Witczak. This is because less torsional distraction was occurred with the help of a side support system adopted in this experiment. The dowel support reaction factor or shear spring stiffness constant obtained from the procedures proposed in this paper may be used as a reference data for the structural analysis of jointed concrete pavement. |
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| ´ÙÀ£;Àü´Ü½ÃÇè;ÁöÁö·Â°è¼ö;Àü´Ü ½ºÇÁ¸µ °¼º°è¼ö;»ó´ë óÁü;dowel;shear test;dowel support reaction factor;shear spring stiffness constant;relative displacement; |
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.10, no.2, 2008³â, pp.81-89
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200824556528985)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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