Grillage Analogy for Multigirder Bridges

by Celal N. Kostem, Lehigh Univ, Bethlehem, United States,
Steven C. Ragazzo, Lehigh Univ, Bethlehem, United States,

Document Type: Proceeding Paper

Part of: Computing in Civil and Building Engineering


Grillage analogy is a method frequently used to simulate the structural response of highway bridges with reinforced concrete deck and steel girders. This approach saves substantial efforts in the development of the 'model' to simulate the bridge superstructure. The effort required for this approach is about 10% of the effort required for a true finite element modeling. However, the accuracy of this approach has not been thoroughly verified. The paper summarizes the findings of a parametric investigation on the use of grillage analogy. It is observed that although the approach gives acceptable results for the flexure of the loaded girders, the remainder of the predictions leaves much to be desired.

Subject Headings: Girder bridges | Highway bridges | Finite element method | Steel bridges | Concrete bridges | Bridge decks | Superstructures

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