Steel and Composite Structures

  • 제19권6호
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  • Pages.1581-1598
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  • 2015
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Structural behavior of inverted V-braced frames reinforced with non-welded buckling restrained braces

  • Kim, Sun-Hee (Department of Architectural Engineering, University of Seoul) ;
  • Choi, Sung-Mo (Department of Architectural Engineering, University of Seoul)
  • 투고 : 2015.02.16
  • 심사 : 2015.08.03
  • 발행 : 2015.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

A concentric braced steel frame is a very efficient structural system because it requires relatively smaller amount of materials to resist lateral forces. However, primarily developed as a structural system to resist wind loads based on an assumption that the structure behaves elastically, a concentric braced frame possibly experiences the deterioration in energy dissipation after brace buckling and the brittle failure of braces and connections when earthquake loads cause inelastic behavior. Consequently, plastic deformation is concentrated in the floor where brace buckling occurs first, which can lead to the rupture of the structure. This study suggests reinforcing H-shaped braces with non-welded cold-formed stiffeners to restrain flexure and buckling and resist tensile force and compressive force equally. Weak-axis reinforcing members (2 pieces) developed from those suggested in previous studies (4 pieces) were used to reinforce the H-shaped braces in an inverted V-type braced frame. Monotonic loading tests, finite element analysis and cyclic loading tests were carried out to evaluate the structural performance of the reinforced braces and frames. The reinforced braces satisfied the AISC requirement. The reinforcement suggested in this study is expected to prevent the rupture of beams caused by the unbalanced resistance of the braces.

키워드

과제정보

연구 과제 주관 기관 : Korea Institute of Energy Technology Evaluation and Planning(KETEP)

참고문헌

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피인용 문헌

  1. Local and global buckling condition of all-steel buckling restrained braces vol.23, pp.2, 2017, https://doi.org/10.12989/scs.2017.23.2.217
  2. Seismic performance evaluation of buckling restrained braced frames (BRBF) using incremental nonlinear dynamic analysis method (IDA) vol.13, pp.6, 2015, https://doi.org/10.12989/eas.2017.13.6.531
  3. The effects of beam-column connections on behavior of buckling-restrained braced frames vol.28, pp.3, 2015, https://doi.org/10.12989/scs.2018.28.3.309
  4. Behavior of three-tube buckling-restrained brace with circumference pre-stress in core tube vol.30, pp.2, 2015, https://doi.org/10.12989/scs.2019.30.2.081