³í¹®¸í |
±¸Á¶ ¼º´É¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â ½ºÇöóÀ̽º ½½¸®ºêÀÇ ¸®ºê ¹× ±æÀÌ¿¡ °üÇÑ Çؼ®Àû ¿¬±¸ / Analytical Study on Ribs and Lengths of Splice Sleeve Influencing Structural Performance |
ÀúÀÚ¸í |
ÀÌ»ó¼·(Lee, Sang-Sup) ; ºÎÀ±¼·(Boo, Yoon-Seob) ; ½Å»ó¹Î(Shin, Sang-Min) |
¼ö·Ï»çÇ× |
´ëÇÑ°ÇÃàÇÐȸ³í¹®Áý, Vol.39 No.8 (2023-08) |
ÆäÀÌÁö |
½ÃÀÛÆäÀÌÁö(235) ÃÑÆäÀÌÁö(9) |
ÁÖÁ¦¾î |
ÇÏÀ̺긮µå ½ºÇöóÀ̽º ½½¸®ºê; ¸®ºê °£°Ý; ¸®ºê ´Ü¸é Çü»ó; ½½¸®ºê ±æÀÌ; À¯ÇÑ¿ä¼ÒÇؼ® ; Hybrid splice sleeve; Spacing of rib; Profile of rib; Length of sleeve; Finite element analysis |
¿ä¾à1 |
ÀÌ ¿¬±¸´Â ÇÏÀ̺긮µå ½ºÇöóÀ̽º ½½¸®ºêÀÇ ¸®ºê¿Í ±æÀÌ°¡ ö±ÙÀÌÀ½ ¼º´É¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¾Ë¾Æº¸±â À§ÇÑ À¯ÇÑ¿ä¼ÒÇؼ®¿¡ °üÇÑ °ÍÀÌ´Ù. ³ª»ç½Ä°ú ±×¶ó¿ìÆ®½ÄÀÌ È¥ÇÕµÈ ±â°è½Ä ÀÌÀ½ ¹æ½ÄÀÎ ¿øÅëÇü ÇÏÀ̺긮µå ½ºÇöóÀ̽º ½½¸®ºê´Â ÀçÁúÀÌ SM45CÀÌ°í, ³»°æÀÌ 31.2 mmÀ̸ç, µÎ²²°¡ 4.3 mm·Î ¼±¹Ý °¡°øÀ¸·Î Á¦À۵Ǿú´Ù. Çؼ®¿¡ »ç¿ëµÈ ö±ÙÀÇ °Á¾Àº SD600 D22À̾ú°í, ±×¶ó¿ìÆ®ÀÇ °µµ´Â 100 MPaÀ̾ú´Ù. Çؼ®Àº Abaqus/ExplicitÀ» »ç¿ëÇÏ¿´°í, ö±ÙÀÇ ºñ¼±Çü °Åµ¿°ú ÆÄ´ÜÀ» ¸ð»çÇϱâ À§ÇØ ÁøÀÀ·Â°ú ¿¬¼º ¼Õ»ó Á¶°ÇÀÌ Æ÷ÇÔµÈ Àç·á ¸ðµ¨À» »ç¿ëÇÏ¿´À¸¸ç, ö±Ù-±×¶ó¿ìÆ®-½½¸®ºê »çÀÌÀÇ Á¢ÃË »óŸ¦ ¸ðµ¨¸µÇϱâ À§ÇØ Áö¼öÇÔ¼ö·Î Ç¥ÇöµÇ´Â ¸é¾Ð-°ú¹ÐÂø °ü°è¿Í ¿îµ¿ ¸¶ÂûÀ» Àû¿ëÇÏ¿´´Ù. Çؼ®º¯¼ö´Â ½½¸®ºê ¸®ºêÀÇ °£°Ý ¹× ´Ü¸é Çü»ó, ±×¸®°í ½½¸®ºêÀÇ ±æÀÌÀ̾ú´Ù. Çؼ®°á°ú ö±ÙÀÌ ÆĴܵǴ Æı«¸ðµå¸¦ ¾ò±â À§ÇØ ½½¸®ºê ¸®ºê °£°ÝÀº ö±Ù ¸®ºê °£°ÝÀÇ 2¹è ÀÌÇÏ·Î ÇÏ°í, ½½¸®ºêÀÇ ±æÀ̴ ö±Ù Á¤Âø±æÀÌ°¡ 6.0d ÀÌ»óÀ¸·Î ÇÏ´Â °ÍÀÌ ¹Ù¶÷Á÷ÇÏ¿´À¸¸ç, ½½¸®ºê ¸®ºê Çü»óÀº ¹Ý¿øÇü, »ç´Ù¸®²Ã, Á÷»ç°¢ÇüÀÇ ¼ø¼·Î ½½¸®ºê-±×¶ó¿ìÆ® »çÀÌÀÇ ½½¸³¿¡ ÀúÇ×ÇÏ´Â ¼º´ÉÀÌ ¿ì¼öÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. |
¿ä¾à2 |
This study aims to examine how the performance of mechanical rebar splices is impacted by the ribs and length of hybrid sleeves, utilizing the finite element (FE) method. The cylindrical hybrid splice sleeve is crafted through machining, composed of SM45C material, featuring an inner diameter of 31.2 mm and a thickness of 4.3 mm. In the FE models, the rebar¡¯s steel grade is SD600 with a diameter of 22 mm (D22), while the grout¡¯s compressive strength is set at 100 MPa. To simulate the nonlinear behavior and fracture of the rebars, the analysis employs the true stress-strain relationship and ductile damage conditions. Moreover, contact interactions between the rebar, grout, and sleeve surfaces are modeled in Abaqus/Explicit using an exponential pressure-overclosure relationship and kinetic friction. The analysis parameters under scrutiny encompass the spacing and profile of the sleeve rib and the sleeve length. Results indicate that the sleeve rib spacing should not exceed twice the rebar rib spacing, and the sleeve length should be more than 6.0d to induce rebar fracture as the failure mode. When considering the profile of the sleeve rib, the ability to resist slippage between the sleeve and grout is most effective in the sequence of semicircular, trapezoidal, and rectangular shapes. |