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16.07: Flange buckling resistance of trapezoidal web girders: Experimental and numerical study
Author(s) -
Jáger Bence,
Kövesdi Balázs,
Dunai László
Publication year - 2017
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.465
Subject(s) - flange , girder , buckling , structural engineering , parametric statistics , engineering , mathematics , statistics
Girders with trapezoidally corrugated web are widely used structural elements in the civil engineering praxis due to their numerous advantages. However, there is a relatively small number of previous investigations focusing on the determination of the flange buckling resistance of the corrugated web girders. Previous experimental and numerical investigations confirmed that the flange buckling resistance model provided by the EN1993‐1‐5 [2] predicts often unsafe results. Therefore, the current paper collects all the previous proposals on the flange buckling resistance and introduces an experimental research program investigating the flange buckling behaviour of trapezoidally corrugated web girders. Based on the test results an advanced FE model is developed, validated and presented. An intensive numerical parametric study is performed on this model to investigate the buckling coefficient and the relationship between the relative slenderness and the reduction factor for corrugated web girders. Based on the experimental and numerical results the current paper introduces an enhanced design method for the determination of the flange buckling resistance. This design method consists of proposal to determine the critical load amplifier of the flange outstand and it also contains a new buckling curve which considers the specialties of the structural behaviour coming from the corrugation profile.