In the last decade most highway grade separation structures consisted of simple span I-beams with a cast-in-place deck slab. Typically, the spans were supported by two end abutments, a central pier, and a pair of intermediate shoulder piers. However, with the new emphasis on safety, the two intermediate piers are no longer permitted. This new regulation coupled with the need for longer spans, means that the standard AASHO-PCI types III and IV beams cannot be used. Nevertheless, it is still possible to use the AASHO-PCI beams on longer spans if the beams are used as segments to be spliced and post-tensioned together at the construction site. The author presents a design procedure for designing such long-span precast segmental bridges. Two fully-worked numerical examples are presented to show the application of the design method and several tables and charts are included to facilitate the design process. (Author)

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    Prestressed Concrete Institute

    205 West Wacker Drive
    Chicago, IL  United States  60606
  • Publication Date: 1973-9

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  • Accession Number: 00054759
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 24 1974 12:00AM