Orthotropic Plate Model for Estimating Deflections in Filled Grid Decks
Publication: Journal of Bridge Engineering
Volume 9, Issue 6
Abstract
Concrete filled grid bridge decks exhibit orthogonal elastic properties and significant two-way bending action enabling orthotropic plate theory to determine structural response for these elements. Current American Association of State Highway and Transportation Officials load and resistance factor design (LRFD) specifications employ an orthotropic plate model to predict live load moment in concrete filled grid bridge decks but provide no guidance for computing displacement, a potentially important serviceability consideration. This paper presents equations to approximate the maximum deflection in concrete filled grid bridge decks based on orthotropic plate theory, multiple patch loads, LRFD design truck and tandem load cases, the influence of multiple spans, and the two most common deck orientations.
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References
1.
American Association of State Highway and Transportation Officials (AASHTO). (1994). LRFD bridge designs specification, Washington, D.C.
2.
Heins, C.P. (1976). Applied plate theory for the engineer, Lexington Books, Lexington, Mass.
3.
Higgins, C. (2003). “LRFD orthotropic plate model for live load moment in filled grid decks.” J. Bridge Eng., 8(1), 20–28.
4.
Mangelsdorf, C.P., Baker, T.H., and Swanson, J.A. (2002). “Predicting deflections in concrete-filled grid deck panels.”Transp. Res. Rec., No. 02-2286, Transportation Research Board Washington, D.C., 17–24.
5.
Timoshenko, S., and Woinowski-Krieger, S. (1959). Theory of plates and shells, McGraw-Hill, New York.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 9 • Issue 6 • November 2004
Pages: 599 - 605
Copyright
Copyright © 2004 ASCE.
History
Published online: Oct 15, 2004
Published in print: Nov 2004
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