PREFABRICATED PRESS-FORMED STEEL T-BOX GIRDER BRIDGE SYSTEM

An all-steel, all-welded box-girder system for short-span highway bridges designed for HS20-44 loading has been presented. For spans up to 65 ft, the proposed superstructure is light and weighs only about 40-45 psf, as compared with over 100 psf for a conventional slab-stringer bridge system. The system is developed from the viewpoints of segmental assemblage, low initial and maintenance costs, and ease of future expansion. As an alternative to the steel plate deck, a design with precast, prestressed concrete deck that acts compositely with the steel section is also presented. This system weighs about 85 psf. It is lighter than the conventional slab-stringer system, and lends itself better to modular construction. Six different girder sections have been designed with a maximum span capacity of 65 ft. The girders have widths of 6 and 8 ft and depths of 30, 36, and 42 in. A suitable combination of these sections can be used to achieve the required bridge width. By increasing the depth of the girders, the system can be used for long spans. The proposed system has been designed under the constraints of 6 and 8-ft wide girder units, from the viewpoint of modular systems. However, further optimization can be achieved by increasing the flange widths to 10 or 12 ft. This would decrease the unit superstructure weight to about 35 psf. With deeper girders and thicker webs and flanges, the system is adaptable to longer spans. (Author)

  • Availability:
  • Corporate Authors:

    American Institute of Steel Construction

    101 Park Avenue
    New York, NY  USA  10017
  • Authors:
    • Taly, N
    • GangaRao, HVS
  • Publication Date: 1979

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 75-83
  • Serial:
    • Engineering Journal
    • Volume: 16
    • Issue Number: 3
    • Publisher: American Institute of Steel Construction
    • ISSN: 0013-8029

Subject/Index Terms

Filing Info

  • Accession Number: 00308048
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 11 1980 12:00AM