Post-Tensioned Slab Bridges on Isolated Supports

by Roger Green, Assoc. Prof.; Dept. of Civ. Engrg., Univ. of Waterloo, Waterloo, Ontario, Canada,

Serial Information: Journal of the Structural Division, 1975, Vol. 101, Issue 1, Pg. 233-247

Document Type: Journal Paper


The results of an elastic model study of a post-tensioned three-span slab bridge are presented. The model is a 1/36-scale version of a typical straight slab bridge on isolated supports. Loading cases considered for the model included both gravity loading and longitudinal prestress. The in-plane and bending stresses resulting from these loading cases were obtained. The observed data were compared with a finite element analysis. Longitudinal moments are generally predictable using elementary beam theory. A two-dimensional finite element analysis is required for transverse moment prediction and support moment prediction. Close agreement was found between the observed and computed data.

Subject Headings: Gravity loads | Finite element method | Longitudinal loads | Tension | Slabs | Bridges | Structural models | Two-dimensional analysis

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