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Çѱ¹°ÇÃà½Ã°øÇÐȸ / v.9, no.6, 2009³â, pp.141-149
Âɰ·ÆÄ±«µÈ GFRP ÇϺαٰú »óºÎ±ÙÀÇ Á¤Âø±æÀÌ »êÁ¤½Ä ºñ±³
( Comparison of Development Length Equation of Bottom and Top GFRP Bars with Splitting Failure )
ÇÏ»ó¼ö;À±Áؼ±; °­³²´ëÇб³ °ÇÃà°øÇаú;°­³²´ëÇб³ °ÇÃà°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â GFRP ÇϺαٰú »óºÎ±ÙÀÇ Á¤Âø±æÀÌ ¼³°è½ÄÀ» Á¦¾ÈÇϱâ À§ÇÏ¿© ½ÇÇèÀû ¿¬±¸¸¦ ¼öÇàÇÏ°í ½ÇÇè°á°úÀÇ Åë°èÀû ºÐ¼®À» ½Ç½ÃÇÏ¿´´Ù. »óºÎ±Ù°ú ÇϺα٠°¢°¢ 52°³ÀÇ ¼öÁ¤Àι߽ÇÇèÀ» °èȹÇÏ¿´À¸¸ç, ½ÇÇ躯¼ö´Â º¸°­±ÙÀÇ ¹¯Èû±æÀÌ(º¸°­±Ù Áö¸§ÀÇ 15, 30, 45¹è), ¼øÇǺ¹µÎ²²(º¸°­±Ù Áö¸§ÀÇ 0.5-2.0¹è), »óºÎ±Ù È¿°ú, º¸°­±Ù Á¾·ù(±¹³»»ê 2Á¾, ±¹¿Ü»ê 1Á¾ µî 3Á¾) ¹× º¸°­±ÙÁö¸§(D10, D13, D16)ÀÌ´Ù. ÇϺαٰú ÇϺα٠°¢°¢¿¡ ´ëÇÏ¿© ¼öÁ¤Àι߽ÇÇèÀ» ÅëÇÏ¿© Æò±ÕºÎÂø°­µµ¸¦ °áÁ¤Çϰí, Æò±ÕºÎÂø°­µµ¿¡ ´ëÇÑ 2º¯¼ö ¼±Çüȸ±ÍºÐ¼®À» ½Ç½ÃÇÏ¿´´Ù. 2º¯¼ö ¼±Çü ȸ±ÍºÐ¼®ÀÇ °á°ú¿¡ ´ëÇÏ¿© 5% ºÐÀ§¼ö¸¦ Àû¿ëÇÏ¿© º¸¼öÀûÀÎ ¹æ¹ýÀ¸·Î Á¤Âø±æÀÌ ¼³°è½ÄÀ» Á¦¾ÈÇÏ¿´´Ù. 2º¯¼ö ¼±Çü ȸ±ÍºÐ¼®¿¡ ÀÇÇÑ ÇϺαٰú ÇϺαÙÀÇ Á¤Âø±æÀÌ ¼³°è½ÄÀ» Á¦¾ÈÇÏ°í »óºÎ±Ù°ú ÇϺαÙÀÇ Á¤Âø½ÄÀ» ºñ±³Çϰí, ACI 440.1R-06 ½Ä°ú ºñ±³ÇÏ¿´´Ù.
The objective of this study was to propose a development length equation for bottom and top GFRP bars. Including the bottom and top GRPP bars, a total of 104 modified pullout tests were completed. The test variables were embedment length (15, 30, 45db), net cover thickness (0.5~2.0db), different GFRP bar types, and bar diameters (10, 13, 16mm). The average bond stresses were determined based on the modified pullout test results. Two variable linear regression analyses were performed on the results of the average bond stresses. Utilizing the 5% fractile concept, a conservative development length design equation was derived. The design equation of the development length for bottom and top GFRP bars was proposed and the design equation derived in this study was compared to the ACI 440.1R-06 committee equation.
 
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GFRP º¸°­±Ù;Á¤Âø±æÀÌ;¼öÁ¤Àι߽ÇÇè;2º¯¼ö ¼±Çüȸ±ÍºÐ¼®;GFRP bar;development length;modified pullout test;two variable linear regression analysis;
 
Çѱ¹°ÇÃà½Ã°øÇÐȸÁö / v.9, no.6, 2009³â, pp.141-149
Çѱ¹°ÇÃà½Ã°øÇÐȸ
ISSN : 1598-2033
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200919038644029)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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