Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
권호 표지
DOI QR코드

DOI QR Code

Local Buckling Behaviors of Flat-Type Stiffeners in Stiffened Plate System

보강판시스템에 적용되는 판형보강재의 국부좌굴거동

  • Received : 2013.10.30
  • Accepted : 2013.12.05
  • Published : 2013.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

Elastic and nonlinear ultimate strength analyses were conducted to examine the effects of the stiffness and slenderness of flat-type stiffeners on ultimate in-plane strengths of a stiffened plate system. Although it is not feasible to consider local buckling in the stiffeners in elastic analysis, it was confirmed that the in-plane strengths of the stiffened plate system can be achieved by antisymmetric buckling mode when a certain level of stiffness in the stiffeners is provided. Nonlinear ultimate strength analysis, in which initial imperfection and residual stress are incorporated, showed that the ultimate strengths are sensitively affected by the mode shapes for initial imperfections. The slenderness limit for flat-type stiffeners in KHBDC (Korean Highway Bridge Design Code) was evaluated as conservative compared to the analysis results.

판형보강재의 강성 및 세장비의 영향이 보강판시스템의 면내압축강도에 미치는 영향을 살펴보기 위해 탄성 및 비탄성 극한강도해석이 수행되었다. 탄성좌굴해석에서는 보강재의 국부좌굴현상이 고려될 수 없지만 보강재의 강성이 일정정도 확보되면 역대칭모드 좌굴형상이 발생되면서 보강판의 면내압축강도가 확보되는 것으로 파악되었다. 초기결함 및 잔류응력이 고려된 극한강도해석에서는 초기결함의 모드형상이 극한강도에 민감하게 영향을 미친다는 사실이 확인되었다. 도로교설계기준에서 제시하는 판형보강재의 세장비제한은 해석 결과와 비교하였을 때 보수적인 수치로 평가되었다.

Keywords

References

  1. Yoo, C. H., Choi, B. H., and Ford E. M. "Stiffness requirements for longitudinally stiffened box-girder flanges," Journal of Structural Engineering, 127(6): 705-711, 2001. DOI: http://dx.doi.org/10.1061/(ASCE)0733-9445(2001)127:6(705)
  2. Bleich, F. Buckling strength of metal structures, McGraw-Hill Book Co., New York, NY. 1952.
  3. Timoshenko, S. P. and Gere, J. N. Theory of elastic stability, McGraw-Hill Book Co., New York, NY. 1961.
  4. Shin, D. K., Le, V. A. and Kim, K. "In-plane ultimate compressive strengths of HPS deck panel system stiffened with U-shaped ribs," Thin-Walled Structures, 63(2013): 70-81, 2013. https://doi.org/10.1016/j.tws.2012.10.001
  5. Kim, J. S., Lee, H. S. and Kim, K. "Ultimate strength evaluation for wide-type box girders in cable-supported bridges," 36th IABSE (International Association for Bridge and Structural Engineering) Symposium, September 2013.
  6. Thang, D. D., Koo, M. and Jeong Y. "Stiffness requirement for flat=bar longitudinal stiffener of box-girder compression flanges," International Journal of Steel Structures, 9(2009): 115-122, 2009. https://doi.org/10.1007/BF03249486
  7. Ministry of Land, Infrastructure and Transport. Korea highway bridge design code, 2012. (in Korean).
  8. American Association of State Highway and Transportation Officials. LRFD Bridge design specifications, Washington, D. C. 2012.
  9. Federal Highway Administration Officials of Research and Development. Proposed design specifications for box girder bridges, Report No. FHWA-TS-80-205, Washington, D. C. 1980.
  10. Abaqus Inc., ABAQUS standard user's manual. Version 6.8.-2, 2008.
  11. Khedmati, M. R., Pedram, M. and Rigo, P. "The effects of geometrical imperfections on the ultimate strength of aluminium stiffened plates subjected to combined uniaxial compression and lateral pressure," Ships and Offshore Structures, 2012(8): 1-22, 2012. DOI: http://dx.doi.org/10.1080/17445302.2012.726761
  12. Fukumoto Y., Usami T. and Okamoto Y. "Ultimate compressive strength of stiffened plates," Proceedings of specialty conference on Metal Bridge, pp. 201-230, St. Louis, MO. 1974.

Cited by

  1. Buckling Behavior of Plates Stiffened with the New Type Ribs vol.30, pp.1, 2018, https://doi.org/10.7781/kjoss.2018.30.1.059
  2. In-plane compressive strength of hybrid steel stiffened plate with single stiffener vol.31, pp.1, 2019, https://doi.org/10.7781/kjoss.2019.31.1.065