한국구조물진단유지관리공학회 논문집 (Journal of the Korea institute for structural maintenance and inspection)

  • 제21권3호
  • /
  • Pages.102-113
  • /
  • 2017
  • /
  • 2234-6937(pISSN)
  • /
  • 2287-6979(eISSN)
한국구조물진단유지관리공학회 (Korea Institute for Structural Maintenance Inspection)
권호 표지
DOI QR코드

DOI QR Code

변형에너지에 기반한 비정형 판부재의 좌굴강도 평가기법

Evaluation of Buckling Strength of Non-structured Plates by Using the Deformation Energy

  • 투고 : 2017.03.07
  • 심사 : 2017.04.18
  • 발행 : 2017.05.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

비정형 판 부재의 탄소성 좌굴 강도를 평가할 수 있는 새로운 지표를 제안하였다. 부재 경계면에 작용하는 하중 또는 경계면의 변화에 따른 외부일 또는 변형에너지를 부재의 평형 변형경로에 따라 계산하고, 이 에너지의 이차 변분량의 부호가 양에서 음으로 바뀌는 시점을 안정한계로 제안하였다. 판 부재의 단면력을 등분포 또는 선형으로 근사한 상태로 단면력을 사용하여 좌굴한계를 평가하는 현 기법과는 반대로 단면력의 변화가 비선형적인 복잡한 경우에도 간단히 좌굴한계를 평가할 수 있다. 선형탄성 문제에 대해서는 본 기법의 결과와 전통적인 방법이 동일한 결과를 도출한다.

A new index for the buckling strength of non-structured plates is proposed. The external work or the deformation energy caused by the external loads or the boundary displacement controled by a load parameter is calculated along an equilibrium path of the member under consideration. If the second variation of the energy with respect to the parameter loses its positiveness, it defined as the limit of the stability. In contrast to the current method given in codes where the stability limit is evaluated by using only representative internal forces, the evaluation of the stability limit is always consistent even with the change of the distribution of the internal forces on the boundary. If the elasticity is concerned, the result from this proposed approach becomes identical to that from the classical methods.

키워드

참고문헌

  1. Do, H. M., Lee, J. R., and Yeom, C. U. (2016), The State of Arts on the Evaluation of the Buckling Strength of Sea Trust-Holdan, Bulletin of The Society of Naval Architects of Korea, The Society of Naval Architects of Korea, 45(4), 18-22.
  2. ABAQUS (2005) Version 6.5 User's Manual, Hibbitt: Karlson & Sorensen Inc.
  3. Bazant, Z. P., and Cedolin, L. (1991), Stability of Structures: Elastic, Inelastic, Fracture, and Damage Theories, Oxford University Press, New York.
  4. DNV-RP-C201 (2010), Buckling Strength of Plated Structures, DetNorskeVeritas.
  5. DNV-RP-C202 (2013), Buckling Strength of Shells, DetNorskeVeritas.
  6. DNV-RP-C208 (2013), Determination of Structural Capacity by Nonlinear FE Analysis Methods, DetNorskeVeritas
  7. EN 1993-1-5 (2006) Eurocode 3: Design of Steel Structures - Part 1-5: General Rules - Plated Structural Elements, European Committee for Standardization.
  8. Jain, A. K (1997), Nonlinear Coupled Response of Offshore Tension Leg Platforms to Regular Wave Forces, Ocean Engineering, 24(7), 577-592.
  9. Jang, B. S., and Cho, H. Y. (2009), Comparison of Buckling Check Formulas and Optimal Design, Journal of Ocean Engineering and Technology, The Korean Society of Ocean Engineers, 23(5), 71-78.
  10. Kim, S. Y., Moon, Y. S., Lee, S. J., Choi, G. G., and Zi, G. S. (2015), Buckling Strength Evaluation of Non-linear Behavior of TLP, KSCE 2015 Convention 2015 Civil Expo & Conference, Korean Society of Civil Engineers, 45-46.
  11. Kim, U. N., Jang, J. T., and Joung, J. H. (2011), Development of a Stability Evaluation System based on Marine Structural Design Codes, Conference Proceeding of the Society of Naval Architects of Korea, The Society of Naval Architects of Korea, 1048-1055.
  12. Lee, S. J., Yoon, Y. C., Cho, W. Y., Yu, S. M., and Zi, G. S. (2009), Large Deformation Inelastic Analysis of API-X80 Steel Linepipes, Journal of the Computational Structural Engineering Institute of Korea, Computational Structural Engineering Institute of Korea, 22(4), 363-370.
  13. Minoru Harada, Masahiko Fujikubo (2002), Estimation of Buckling and Ultimate Strength of a Rectangular Plate with Cutout, The Twelfth International Offshore and Polar Engineering Conference, The International Society of Offshore and Polar Engineers, 630
  14. Paik, J. K., Kim, B. J., Seo, J. K., (2008), Methods for Ultimate Limit State Assessment of Ships and Ship-Shaped Offshore Structures: Part II Stiffened Panels, Ocean Engineering, Elsevier, 35(2), 271-280. https://doi.org/10.1016/j.oceaneng.2007.08.007
  15. Pham, CH, and Hancock, GJ (2012), Tension Field Action for Cold-formed Sections in Shear, Journal of Constructional Steel Research, 72, 168-178. https://doi.org/10.1016/j.jcsr.2011.12.001