Title:
Spliced Segmental Recast Concrete Bridges Using Staged Post-Tensioning
Author(s):
D. I. Harvey
Publication:
Symposium Paper
Volume:
93
Issue:
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
DOI:
10.14359/6325
Date:
9/1/1986
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.