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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Spliced Segmental Recast Concrete Bridges Using Staged Post-Tensioning
Author(s): D. I. Harvey
Publication: Special Publication
Appears on pages(s): 721-736
Keywords: box beams; bridge anchorages; bridges (structures);
continuity (structural); diaphragms (concrete); girders; I-beams;
post-tensioning; precast concrete; prestressing steels;
pretensioning; segmental construction; splicing
Abstract:Precast concrete I-girder sections are widely used in bridge construction in British Columbia. A good deal of attention has been paid to methods of splicing girder segments to achieve structural continuity or to extend the span range to which the girders can be applied. A promising development has been the hybrid girder design, whereby pretensioned I-girders are spliced and post-tensioned in the field to achieve con-tinuity. The same technique can be used for precast box-girders which are especially suited to bridges where plan curvature is involved. More structural efficiency and deck durability can be achieved by applying additional post-tensioning after construc-tion of the cast-in-place concrete deck. Four examples of recent bridges using this technique are reviewed, while the limitations and scope for future development are discussed.
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