Ultimate strength interaction of stiffening steel box girder in cable-supported bridges
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Bibliographic Details
| Author(s): |
Jong Seo Kim
Hae Sung Lee Kyungsik Kim |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Symposium: Engineering for Progress, Nature and People, Madrid, Spain, 3-5 September 2014 | ||||
| Published in: | IABSE Symposium Madrid 2014 | ||||
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| Page(s): | 1611-1617 | ||||
| Total no. of pages: | 7 | ||||
| Year: | 2014 | ||||
| DOI: | 10.2749/222137814814068157 | ||||
| Abstract: |
Wide flange box type steel cross-sections are widely adopted as stiffening girders in cable- supported long span bridges due to their relatively light self-weight, superb torsional rigidity and aero-elastic performance. Those stiffening girders are supposed to resist externally applied bending moment as well as compressional forces in longitudinal direction transmitted from inclined cables. Ultimate strengths are interactively determined as ultimate flexural strength is affected by applied axial compressive forces and ultimate compressive strength is affected by applied flexural moment. Effect of strength interaction between bending and compression are investigated for wide flange type steel box girders in this study. Wide flanges are stiffened with U-shaped stiffeners that are also called U-ribs. To evaluate the interaction effect, nonlinear incremental analysis techniques are fully utilized for hypothetical numerical models. Initial imperfections and residual stresses are also incorporated in the analysis. Strength interaction curves are compared with existing codes for the purpose of practical strength design for wide flange steel box girders in cable-supported bridges. |
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| Keywords: |
effective width cable-supported bridges wide flange type steel box girders ultimate strength interaction stiffened plates U-rib
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