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http://dx.doi.org/10.5762/KAIS.2016.17.8.456

Effects of flange and web slenderness ratios on elastic flange local buckling of doubly symmetric I-girders  

Lee, Jeong-Hwa (School of Civil, Environmental and Architectural Engineering, Korea University)
Lee, Kee-Sei (Research Institute for Mega Structure Technology, Korea University)
Byun, Nam-Joo (School of Civil, Environmental and Architectural Engineering, Korea University)
Kang, Young-Jong (School of Civil, Environmental and Architectural Engineering, Korea University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.17, no.8, 2016 , pp. 456-464 More about this Journal
Abstract
Increasing the strength of structural materials allows their self-weight to be reduced and this, in turn, enables the structures to satisfy esthetic requirements. The yield strength of high-performance steel is almost 480 MPa, which is approximately 50% higher than that of general structural steel. The use of high strength materials, however, makes the sections more slender, which can potentially result in significant local stability problems. The strength of slender element sections might be governed by their elastic buckling behavior, and the elastic buckling strength is very sensitive to the boundary conditions. Because the web provides the boundary conditions of the compressive thin-flange, the stiffness of the web can affect the elastic buckling strength of the flange. In this study, therefore, the effects of the flange and web slenderness ratios on the elastic flange local buckling of I-girders subjected to a pure bending moment were evaluated by finite element analysis (FEA). The analysis results show that the elastic local buckling strength and buckling modes were affected not only by the web support conditions, but also by the flange and web slenderness ratios.
Keywords
Elastic buckling; Finite element analysis; Flange local buckling; Flange-web interaction; Elastic buckling coefficient;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 AASHTO, AASHTO LRFD Bridge Design Specifications, American Association of State Highway and Transportation Officials, Inc., Washington, D. C., 2014.
2 AISC, Specification for structural Steel Buildings, American Institute of Steel Construction, 2010.
3 Korean Ministry of Construction and Transportation, Standard Specifications for Highway Bridges, Korea, 2012.
4 C. H., Lee, K. H., Han, D. K., Kim, C. H., Park, J. H., Kim, S. E., Lee and T. H., Ha, Local Buckling and Inelastic Behavior of 800 MPa High-Strength Steel Beams, Journal of Korean Society of Steel Construction, vol. 24, no. 4, pp. 479-490, 2012. DOI: http://dx.doi.org/10.7781/kjoss.2012.24.4.479   DOI
5 D. L., Johnson, An investigation into the interaction of flanges and webs in wide-flange shapes, in: Proccedings 1985 Annual Technical Session, 1985.
6 E. Y., Cho and D. K., Shin, Flexural Strength of HSB Steel Girders Due to Inelastic Lateral-Torsional Buckling-Sections with Slender Web, Journal of Korean Society of Steel Construction, KSSC, vol. 24, no. 2, pp. 217-231, 2012. DOI: http://dx.doi.org/10.7781/kjoss.2012.24.2.217   DOI
7 J. H., Kim, K. Y., Kim, J. H., Lee, K. S., Kim, Y. J., Kang, Flange Local Buckling(FLB) for Flexural Strength of Plate Girders with High Performance Steel(HSB 800), Journal of Korean Society of Steel Construction, KSSC, vol. 26, no. 2, pp. 91-103, 2014. DOI: http://dx.doi.org/10.7781/kjoss.2014.26.2.091   DOI
8 J. H., Lee, K. S., Lee, J. N., Byun, Y. J., Kang, Characteristics of Elastic Flange Local Buckling of Doubly Symmetric I-girder subjected to bending moment, Conference of Korean Society for Advanced Composite Structures, 2016.
9 S. P. Timoshenko, J. M. Gere, Theory of Elastic Stability, Dover Publications, Inc, N.Y., 1961.