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The optimal moment capacity of plate girders: Parameter research on a plate girder under pure bending and a design strategy
Author(s) -
Abspoel Roland
Publication year - 2019
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.1126
Subject(s) - flange , girder , structural engineering , buckling , stiffness , bending moment , bending , moment (physics) , engineering , bending stiffness , physics , classical mechanics
In a material driven economy, the lever arm between the flanges and the flange area have to increase to create a cross‐sectional class 4 section with an optimal moment resistance for a specific amount of steel. This leads to a higher moment resistance than based on a section of class 1 up to 3 with equal cross‐sectional area and the stiffness of such plate girder increases too. The increase in stiffness means that high strength steels can be used leading to a large reduction of the steel consumption. The web slenderness of the plate girder increases too and so flange induced buckling has to be verified. Eurocode 3 restricts the maximum web slenderness to avoid flange induced buckling, originally derived by Basler. Experimental research conducted at the Stevin II laboratory of Delft University of Technology, shows that this requirement related to flange induced buckling is too conservative. Ten unstiffened plate girders with a web slenderness up to 800 are tested and analysed. This paper presents the results of a parameter research and finally, a design strategy to design plate girders with a maximum web slenderness and so with an optimal moment resistance is presented.