Inelastic Buckling Behavior of Column and Beam-Column

기둥과 보-기둥 구조물의 비탄성 좌굴거동

  • 이동식 (서울대학교 지진공학센터) ;
  • 오순택 (서울산업대학교 구조공학과)
  • Received : 2003.11.12
  • Accepted : 2004.04.02
  • Published : 2004.04.27

Abstract

The inelastic lateral-torsional buckling behavior of the beam-columns and the columns was investigated in this paper. The energy method was deployed to study the inelastic buckling behavior of the beam-columns and columns. which requires the iterative solution of a fourth-order eigenproblem. Hitherto, the patterns of residual stress that satisfies the I-section manufacturing in Korea is not available, therefore the pattern of residual stress used in this study is a 'well-known' simplified pattern. The simplified pattern of the residual stresses is incorporated with the flow theory of plasticity to model the inelastic response. Firstly, this study investigates the inelastic lateral-torsional buckling behavior of the I-section beam-columns under a concentric axial compressive force and uniform bending, and the effect of residual stress on the inelastic buckling behavior of beam-columns is studied. The study is then extended to the inelastic buckling of the columns by eliminating a bending moment. These results are compared it with the design method in the Korean Steel Designers Manual (KSDM 1995). This study has found that design method in KSDM (1995) is excessively conservative.

에너지법을 이용하여 보-기둥 및 기둥의 비탄성 좌굴거동을 해석하였다. 미국에서 생산되는 I 형강에 적용되는 단순형 잔류응력 모델을 우리나라에서 생산되는 I 형강에 적용하였다. 먼저, 집중 압축 축하중과 균등 휨을 동시에 받는 I 형강에 대하여 비탄성 횡-비틀림 좌굴거동을 알아보고 보-기둥에서의 잔류응력의 영향을 해석하였다. 또한 기둥의 경우에 대하여 해석하였으며 얻어진 결과를 강구조편람에 의한 설계 시의 값과 비교하였다. 결론적으로 강구조편람에 의한 설계는 과설계가 됨을 알 수 있었다.

Keywords

References

  1. Publications, IABSE v.33-II Inelastic Lateral Torsional Buckling of Beam Columns Abdel-Sayed, G.;Aglan, A.A.
  2. Journal of Constructional Steel Research v.42 no.2 Lateral-Distortional Buckling of Continuously Restrained Columns Bradford, M.A.
  3. Engineering Structures v.4 Distortional Buckling of Thin-Web Beam-Columns Bradford, M.A.;Trahair, N.S.
  4. Journal of Structural Engineering v.110 no.6 Plate Instability of W Shapes Dawe, J.L.;Kulak, G.L.
  5. Journal of the Structural Division v.92 no.ST2 Inelastic Lateral-Torsional Buckling of Beam-Columns Fukumoto, Y.;Galambos, T.V.
  6. Journal of the Engineering Mechanics Division v.83 no.EM2 Plate Buckling in the Strain-Hardening Range Haaijer, G.
  7. Transactions v.100 Plastic Deformation of Wide-Flange Beam-Columns Ketter, R.L.;Kaminsky, E.L.;Beedle, L.S.
  8. Korean Steel Designers' Manual (KSDM), vol. 3, Design of Steel Structure Korean Society of Steel Construction
  9. Distortional Buckling of I-Sections Lee, D.S.
  10. Codified Design of I-Beam Under Uniform Bending Lee, D.S.;Oh, S.T.
  11. Journal of the Engineering Mechanics Division v.91 no.EM6 Inelastic Lateral-Torsional Buckling of Beam-Columns Miranda, C.;Ojalvo, M.
  12. Transactions v.108 Numerical Procedure for Computing Deflections, Moments, and Buckling Loads Newmark, N.M.
  13. Theory of Elastic Stability Timoshenko, S.P.;Gere, J.M.
  14. Theory of Plates and Shells Timoshenko, S.P.;Woinowsky-Krieger, S.
  15. Flexural-Torsional Buckling of Structures Trahair, N.S.
  16. Journal of the Structural Division v.98 no.ST11 Buckling of Inelastic I-Beams Under Uniform Moment Trahair, N.S.;Kitipornchai, S.