CAPACITY OF MONO-SYMMETRIC GIRDERS WITH SLENDER WEBS IN PLATE GIRDER COMPOSITE BRIDGES | ||||
| Journal of the Egyptian Society of Engineers | ||||
| Article 4, Volume 50, Issue 3, September 2011, Page 9-2 PDF (1.25 MB) | ||||
| Document Type: Scientific and technological | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Ghada M. El-Mahdy* | ||||
| Associate Research Professor, Structures and Metallic Construction Research Institute, Housing and Building National Research Center (HBRC), Egypt | ||||
| Abstract | ||||
| Mono-symmetric plate girders are often used in simply supported composite bridges to eliminate local plate buckling in the compression flange during construction. This causes the neutral axis of the plate girder to shift downwards subjecting more of the web to compressive stresses due to bending. In slender webs this increases the possibility of local buckling in the compression part of the web during construction. However, depending on the slenderness (width-to-thickness ratio) of the web, the post-buckling reserve capacity may accommodate this local buckling within the elastic limit of the web for during construction loads. Hence, this would allow for the use of more slender webs in composite plate girder construction without the need for longitudinal web stiffeners or the reduction of the overall composite section due to local plate buckling in the web. Recommended values of stress level are given for mono-symmetric plate girders in the non-composite stage based on the results of a non-linear finite element analysis | ||||
| Keywords | ||||
| : composite bridges; effective width; finite element analysis; local plate buckling; mono-symmetric sections; plate girders; stress gradient; stress level | ||||
| References | ||||
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