한국강구조학회 논문집 (Journal of Korean Society of Steel Construction)

한국강구조학회 (Korean Society of Steel Construction)
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대직경 스터드 전단연결재의 정적거동

Static Behavior of Large Stud Shear Connectors

  • 투고 : 2003.08.13
  • 심사 : 2003.10.13
  • 발행 : 2003.12.27
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초록

강합성교량에서 19mm 또는 22mm 직경을 갖는 전단연결재가 일반적으로 사용되고 있다. 강교 상세의 단순화와 향후 바닥판 제거의 용이성 및 프리캐스트 바닥판 전단포켓의 효율적인 배치를 위해서는 대직경 스터드 전단연결재가 필요하다. 현재의 전단연결재 설계범위를 넘어서는 대직경 스터드 전단연결재에 대한 push-out 실험을 통해서 정적거동에 관한 항목들을 검토하고 기존 설계식과의 비교를 수행하였다. 25, 27, 30mm 직경의 스터드에 대한 전단실험을 통해서 탄성영역에서의 전단강성을 평가하고 세 개의 직선으로 구성된 하중-상대변위 곡선을 제안하였다. 파괴시의 극한상대변위를 평가하고 극한강도를 유로코드-4의 설계식과 비교하여 설계의 안전율을 평가하였다. 또한 30mm 스터드의 경우는 용접과 콘크리트 지압능력의 개선이 필요한 것으로 나타났다.

Shear studs with a diameter of 19mm or 22mm are typically used in steel-concrete composite bridge. For the simplification of details in steel bridges, the convenience of removing concrete slab, and the efficient distribution of shear pockets for precast decks, large studs can be an excellent alternative. Through push-out tests on large stud shear connectors that transcend the limitation of current design codes, static behavior was investigated and comparisons with design equations performed. The shear stiffness of the connectors in elastic range and trilinear load-slip curves were proposed after shear tests on 25mm, 27mm, and 30mm studs. The ultimate slip capacity and ultimate strength of large studs were also evaluated, with the test results revealing conservative values for the design shear strength in Eurocode-4. For 30mm stud shear connectors, the welding quality and bearing capacity of concrete slab should be improved.

키워드

과제정보

연구 과제 주관 기관 : 과학기술부

참고문헌

  1. 대한토목학회논문집 v.19 no.I-4 합성교량 스터드 전단연결부의 극한한계상태 장승필;심창수;윤석구
  2. J. of Bridge Engineering v.7 no.3 Large Shear Studs for Composite Action in Steel Bridge Girders Badie, S.S.;Tadros, M.K.;Kakish, H.F.;Splittgerber, D.L.;Baishya, M.C.
  3. Eurocode 4, Design of composite steel and concrete structures, Part 2: Composite bridges (ENV 1994-2)
  4. Tech. Rept. Osaka University v.33 no.1733 Effects of concrete placing direction on static and fatigue strengths of stud shear connectors Maeda, Y.;Matsui, S.
  5. Concrete no.Sept. Shear connectors in steel-concrete composite beams for bridges. 1: Static and fatigue tests on push-out specimens Mainstone, R.J.;Menzies, J.B.
  6. Strudural Engineer v.49 no.Mar. CP117 and shear connectors in steel-concrete composite beams with made with normal-density and lightweight concrete Menzies, J.B.
  7. Composite Steel and Concrete Structural Members, Fundamental Behavior Oehlers, D.J.;Bradford, M.A.
  8. Journal of Constructional Steel Research v.6 The shear stiffness of stud shear connections in composite beams Oehlers, D.J.;Coughlan, C.G.
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  10. Engineering Journal of American Institute of Steel Construction v.8 no.Apr. Shear Strength of stud connectors in light-weight and normal- weight concrete Ollgaard, J.G.(et al.)
  11. The Institution of Civil Engineers v.140 no.Jan. The Behavior of Shear Connection in Composite Beam with Full-Depth Precast Slab, Structures and Buildings Shim, C.S.;Kim, J.H.;Chung, C.H.;Chang, S.P.
  12. Test Results and Design Recommendations for Composite Beams, Fritz Engineering Laboratory, Lehigh University, Report 297.10 Slutter, R.G.;Driscoll, G.C.