Analysis of Curved, Prestressed, Segmental Bridges

by Stefanus F. van Zyl, (A.M.ASCE), Assoc.; Bruinette, Kruger, Stoffberg, Consulting Engrs., Cape Town, South Africa,
Alexander C. Scordelis, (F.ASCE), Prof.; Dept. of Civ. Engrg., Univ. of California at Berkeley, Berkeley, Calif.,

Serial Information: Journal of the Structural Division, 1979, Vol. 105, Issue 11, Pg. 2399-2417

Document Type: Journal Paper


A method for the time-dependent analysis of curved, concrete box-girder bridges with nonprismatic cross section has been developed. The bridge can consist of precast segments, cast-in-place segments or any other form of staged or conventional construction. Time-dependent effects allowed for are creep and shrinkage of concrete, changes in material properties, temperature variations, and relaxation of prestressing steel. A computer program was developed to carry out the analysis. Input consists of a description of the bridge geometry, prestressing tendon details, material data, environmental data, and the construction sequence. Results are plotted for two examples. In the first, the axial stress of a curved bridge is compared with experimental results. In the second, the deflection history of a segmentally erected bridge is compared to experimental results.

Subject Headings: Infrastructure construction | Concrete bridges | Curvature | Prestressing | Bridge tests | Time dependence | Construction materials | Axial forces

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