DESIGN, FABRICATION, AND ERECTION OF A CURVED, PRESTRESSED CONCRETE BRIDGE WITH CONTINUOUS GIRDERS

A five-span, prestressed concrete bridge has been constructed for the Pennsylvania Department of Transportation at the Philadelphia Airport. The five curved, post-tensioned, box girder for the bridge are continuous over two and three spans, respectively. Approximate lengths are 139 and 126 ft. for the two-span girders and 92, 135, and 92 ft. for the three-span girders. Radius of curvature is 478 ft. for the two-span girders and 326 ft. for the three-span girders. Curvature of the girders was achieved by incremental chords 20 ft. long, and field splicing was done only at piers with cast-in-place diaphragms. The bridge was analyzed assuming that the girders and diaphragms act as a two-dimensional grid system. A conventional program based on a matrix method of analysis was used to find the bending moments, shear forces, torsional moments, and displacements. Post-tensioning forces were analyzed using a space frame matrix method of analysis. Girders were prefabricated in lengths corresponding to the five spans and were transported by truck to the job site. Each span length of the girder was partly post-tensioned for shipment, and final post-tensioning for cotninuity over the piers was done in the field. The design, fabrication, transportation, erection, and final post-tensioning of the continuous curved girders are described in this paper. Details of the composite deck are also discussed.

Media Info

  • Media Type: Print
  • Features: Figures; Photos;
  • Pagination: pp 136-140
  • Monograph Title: Second bridge engineering conference. volumes 1 and 2
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00390857
  • Record Type: Publication
  • ISBN: 03090036593
  • Files: TRIS, TRB
  • Created Date: Dec 30 1984 12:00AM