Buckling Resistance of Steel Curved Bridge Girder Webs
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Bibliographic Details
| Author(s): |
Philippe Van Bogaert
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | 18th IABSE Congress: Innovative Infrastructures – Towards Human Urbanism, Seoul, Korea, 19-21 September 2012 | ||||
| Published in: | IABSE Congress Seoul 2012 | ||||
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| Page(s): | 980-987 | ||||
| Total no. of pages: | 8 | ||||
| DOI: | 10.2749/222137912805111401 | ||||
| Abstract: |
A numerical research is conducted about the effect of curvature of web plates of closed section bridge girders. An identical beam has been considered, while the web plates take increasing curvature. Linear elastic calculations show a rather surprising increase of the buckling resistance with curvature. Both, the GMNAnalysis and GMNIA confirm a slightly higher ultimate bending moment for curved webs. In particular GMNIA shows there is no critical sensitivity to imperfections, although two types have been considered and the amplitude was varied, well beyond the recommendations of EN 1993-1-6. Actually, the imperfection shape corresponding to the linear buckling mode results in more critical behaviour than a perfectly evident long wave pattern. Although the model being used includes a certain amount of shear force, an increase of shear might influence the results. This, together with testing on accurately scaled models is future steps in the research. |
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| Keywords: |
Steel web plates curved web types of imperfections imperfection amplitude non-linear numerical simulation
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