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{A study for Anchor Bolt embed length requirement in Steel Structure}

By


RYU CHANGMYONG
(·ùâ¸í)
PROFESSIONAL ENGINEER IN MECHANICAL
(°Ç¼³±â°è±â¼ú»ç/»ê¾÷±â°è¼³ºñ±â¼ú»ç)


AND

PES ENGINEERING
(ÇÇÀÌ¿¡½º±â¼ú»ç»ç¹«¼Ò ´ëÇ¥)
MECHANICAL ENGINEERING CONSULTATION
ADVISER/FOUNDER
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ÃÖÃÊ ÀÛ¼ºÀÏÀÚ : 2014³â 05¿ù24ÀÏ
ÃÖÁ¾ ¼öÁ¤ÀÏÀÚ : 2014³â 11¿ù12ÀÏ




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ÁÖÁ¦¾î : ¾ÞÄ«º¼Æ®¹¯Èû±æÀÌ, ö±¸Á¶¹°, ¾ÞÄ«±âÃʺ¼Æ®, ANCHOR BOLT, STEEL STRUCTURE

ABSTRACT: This paper has been prepared by PES-ENG for the guidance in decision of required embed Anchor bolt length. that are cast into reinforced concrete foundations in order to "Anchor" steel structures to those foundation. The guide its of a general nature, explaining the manner in which anchor bolts behave and therefore should be designed, the materials and installation methods that should be specified and used in their manufacture, and common problems with design, manufacture and installation. The basic principles of structure action are described, with only a small number of relevant equations, Because of the infinite variety of foundation types, reinforcing arrangements and edge distance. It is not possible to provide "equations" to cover all situation. However, if the fundamental action are understood and allowed for in the design of the bolt embedment and the foundation, a dependable anchorage can be achieved. Thus, this paper shows that simple theory of required Anchor bolt embed length based on considering anchor bolt"s axial force against concrete"s bearing force between two force equilibrium equation, that of concrete bearing force is no more than maximum tensile stress of anchor bolt.

1. ¾ÞÄ«º¼Æ® ±æÀÌ ¼±Á¤½Ã Àû¿ë ¹®Á¦Á¡ °íÂû
Anchor Bolt ¼Ò¿ä ±æÀÌ ¼±Á¤½Ã ¼³°èÀû °í·Á »çÇ× Áß ÁÖ¿ä ¹®Á¦Á¡À» ³ª¿­ÇÏ¸é ´ÙÀ½ÀÇ ¿¹¸¦ µé ¼ö ÀÖ´Ù.
1) ºÒÇÕ¸®ÇÑ °è»ê °úÁ¤
2) ¼³°èÀû Àû¿ë ±âÁØ°ú ÄÜÅ©¸®Æ® °¡ÀåÀÚ¸®¿ÍÀÇ ÀÌ°Ý °Å¸®¿¡ ´ëÇÑ ±âÁØÀÌ ºÒÅõ¸í
3) Anchor Bolt »ç¿ë ÀçÁú°ú ÄÜÅ©¸®Æ® Ư¼º°úÀÇ ºÒÀÏÄ¡
4) Anchor Bolt °£°Ý°ú ÄÜÅ©¸®¸®Æ® ±¸Á¶¿ÍÀÇ °ü°è¿¡ ´ëÇÑ »ç¾çÀÌ ºÒÈ®½Ç
5) Anchor Bolt¿Í Àû¿ë Washer¿ÍÀÇ ¿ªÇÐÀûÀÎ °ËÅä Àû¿ë ±âÁØ ¹ÌÈ®¸³
6) Anchor Bolt »çÀÌÁî ¼±Á¤½Ã Washer¿Í Base Plate¿ÍÀÇ ¿ëÁ¢ Á¶°ÇÀÌ ¹Ì¹Ý¿µ
7) Anchor Bolt »çÀÌÁî ¼±Á¤½Ã Anchor Bolt Root Çü»óÀÌ °í·ÁµÇÁö ¾ÊÀ½
8) Anchor Bolt »çÀÌÁî ¼±Á¤½Ã ÄÜÅ©¸®Æ® ¸Å¸ô ±æÀÌ°¡ ¹Ý¿µµÇÁö ¾Ê°í, Anchor Bolt´Â Àü´Ü Æı« Á¶°ÇÀ¸·Î¸¸ °í·ÁÇÔ
9) Anchor Bolt ±æÀÌ ¼±Á¤½Ã À¯È¿ ¸Å¸ô ±æÀÌ¿Í ÄÜÅ©¸®Æ®±¸Á¶¿ÍÀÇ °ü°è Çؼ® ±âÁØÀÌ ¹ÌÈ®¸³
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2. ¾ÞÄ«º¼Æ® ÇÏÁß ¹× ÀÀ·Â °Åµ¿
(º» ÀÚ·á´Â SESOC DESIGN GUIDE (Author : John Scarry, Edited By Barry Davidson)¸¦ ÀοëÇÏ¿´À¸¸ç, ¾ÞÄ«º¼Æ®¿¡ Àû¿ëµÇ´Â ÀÎÀå,Àü´Ü,±ÁÈû¸ð¸àÆ®¿¡ ´ëÇÑ ÀÀ·Â °Åµ¿À» ³ªÅ¸³»°í ÀÖ´Ù)
Fig 1 : Ãà¾ÐÃàÀÀ·ÂÀÌ Áö¹è
Fig 2 : º¥µù ¸ð¸àÆ®°¡ Áö¹è
Fig 3 : ÃàÀÎÀåÀÀ·ÂÀÌ Áö¹è
Fig 4 : ÃàÀÎÀåÀÀ·Â°ú º¥µù¸ð¸àÆ®°¡ Áö¹è
Fig 5 : ¸ôŸ¸£ Ãø¸é º£¾î¸µ ÇÏÁßÀÌ Áö¹è
Fig 6 : Base Plate¿Í ÄÜÅ©¸®Æ®¿¡ º¼Æ® º£¾î¸µ ÇÏÁß ¹× º¼Æ® º¥µù ÇÏÁßÀÌ Áö¹è
Fig 7 : ¾ÞÄ«º¼Æ®¿¡ º¥µù ¸ð¸àÆ®°¡ Áö¹è


















3. ¾ÞÄ«º¼Æ® ÀÀ·Â °Åµ¿ ½Ã¹Â·¹ÀÌ¼Ç ½ÃÇè °á°ú
º» ½ÃÇèÀº Czech Technical University in Prague¿¡¼­ M24 ¾ÞÄ«º¼Æ®ÀÇ ÀÎÀå·Â¿¡ µû¸¥ ÄÜÅ©¸®Æ®¿Í ¾ÞÄ«º¼Æ®ÀÇ ÆÄÁö·ÂÀÇ º¯À§ °Åµ¿À» ½ÃÇèÇÑ °á°ú¸¦ ³ªÅ¸³½ °ÍÀ¸·Î¼­, º¼Æ®¿¡ ÀÎÀå ÀÀ·ÂÀÌ °É¸± ¶§ º¼Æ®ÀÇ Åº¼º ÇÑ°è´Â Ãà ¹æÇâ º¯À§ °ªÀÌ 0.5mm ¹üÀ§·Î ³ªÅ¸³­´Ù. ÀÌ´Â 5.4Ç׿¡¼­ ¸Å¼³±æÀÌ 250mm Á¶°Ç¿¡¼­ ÃÖ´ë º¯Çü·®ÀÌ 0.494 mm¿Í °ÅÀÇ ÀÏÄ¡ÇÑ´Ù°í º¼ ¼ö ÀÖ´Ù.













4. ¾ÞÄ«º¼Æ® ÀÎÀå/¾ÐÃà Ãà·Â¿¡ µû¸¥ ¿ä±¸ ¸Å¼³ ±æÀÌ
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5. ¾ÞÄ«º¼Æ® Ãà·Â¿¡ µû¸¥ ÃÖ´ë º¯Çü·®
1) ¾ÞÄ«º¼Æ® »çÀÌÁî M20ÀÇ ÃÖ´ë ÀÎÀå ÀÀ·Â(400Mpa), Áï M20 º¼Æ® ´Ü¸éÀû¿¡ ´ëÇÑ ÃÖ´ë Ãà·Â(12,566 kgf)¿¡¼­ ¸Å¼³±æÀÌ 160mm Á¶°Ç¿¡¼­ ÃÖ´ë º¯Çü·®À» »êÃâÇÑ °á°úÀ̸ç, 0.3139 mm·Î ³ªÅ¸³²À» ¾Ë ¼ö ÀÖ´Ù.


















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4) ¾ÞÄ«º¼Æ® »çÀÌÁî M20ÀÇ ÃÖ´ë ÀÎÀå ÀÀ·Â(400Mpa), Áï M20 º¼Æ® ´Ü¸éÀû¿¡ ´ëÇÑ ÃÖ´ë Ãà·Â(12,566 kgf)¿¡¼­ ¸Å¼³±æÀÌ 250mm Á¶°Ç¿¡¼­ ÃÖ´ë º¯Çü·®À» »êÃâÇÑ °á°úÀ̸ç, 0.494 mm·Î ³ªÅ¸³²À» ¾Ë ¼ö ÀÖ´Ù.


















6. ¾ÞÄ«º¼Æ® ÃÖ´ë À¯È¿ ±æÀÌ
1) ¾ÞÄ«º¼Æ® ¸Å¼³±æÀÌ 650mm¿¡ ´ëÇÑ ÃÖ´ë À¯È¿ ±æÀÌ »êÃâ °á°úÀ̸ç, ÃÖ´ë À¯È¿ ±æÀÌ´Â 80.5mm(¾ÞÄ«º¼Æ® Á÷°æÀÇ ¾à 4¹è)·Î ³ªÅ¸³²À» ¾Ë ¼ö ÀÖ´Ù.











2) ¾ÞÄ«º¼Æ® ¸Å¼³±æÀÌ 350mm¿¡ ´ëÇÑ ÃÖ´ë À¯È¿ ±æÀÌ »êÃâ °á°úÀ̸ç, ÃÖ´ë À¯È¿ ±æÀÌ´Â 80.5mm(¾ÞÄ«º¼Æ® Á÷°æÀÇ ¾à 4¹è)·Î ³ªÅ¸³²À» ¾Ë ¼ö ÀÖ´Ù.













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¾ÞÄ«º¼Æ® À¯È¿ ¹¯Èû±æÀÌ : Le
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¾ÞÄ«º¼Æ®ÀÇ ´Ü¸éÀû: A
¾ÞÄ«º¼Æ®ÀÇ Á÷°æ : d
ÀÀ·Âºñ(c) =¥ò1/¥ò2
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¾ÞÄ«º¼Æ® À¯È¿ ¹¯Èû±æÀÌ(Le)=A*c/R=314mm^2*16.6/3.14*20m=83mm
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Âü°í¹®Çå
1) HERON Vol, 53(2008) No.1/2, Frantisek Wald, Czech Technical University, Faculty of Civil Engineering, Prague, Czech Republic.
2) Akiyama H. : Seismic Design of Steel Column for Architecture. In Japanese, Gibodokupan, Tokyo 1985.
3) Eurocode 3, ENV-1993-1-1, Design of Steel Structure-General Rule and Rules for Buildings. CEN, Brussels 1992, including Part 1.1, A2: Design of Steel Structures-General Rules and Rules for Building, Annex J, European Pre-norm, CEN, Brussels 1998.
4) Melchers R.E. : Modelling of Column-Base Behaviour. In Connections in Steel Structures, Behaviour, Strength and Design, Proceedings, ed. Bjorhovde R., Brozzetti J., Colson A., Elsevier Applied Science, London 1987, pp. 150-157
5) NZS 3101:1995 Concrete Structures Standard, STandards New Zealand.
6) Design Standard for Steel Structure 1979, The Architectural Institute of Japan.
7) ACI 318-05, " Building Code Requirements for Structure Concrete", ACI 2005.







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