FIELD TESTING OF HORIZONTALLY CURVED STEEL GIRDER BRIDGES: FOURTH INTERIM REPORT

Experimentally determined response of a symmetrical, two-span, continuous, horizontally curved steel box-girder bridge is compared with a theoretical analysis represenging the same structure as a planar grid. The structure evaluated is a three-girder bridge with a centerline span length and radius of 112.7 and 290 ft, respectively. Field measurements consisted of strains, deflections, rotations, and crosssection deformations in one span of the structure. Test results show that the experimental in-plane bending moments for dead and static live loads were approximately 86 percent of their respective theoretical values. Comparisons with the proportion of total load carried by the individual girder, however, were within 6 percent. The maximum live-load distribution factor for this structure is smaller than the value used in design of straight box-girder structures. Increased torsional stiffness resulting from the closely spaced internal diaphragms is believed to have caused this favorable effect. /FHWA/

  • Supplemental Notes:
    • Prepared in cooperation with the U.S. Department of Transportation, Federal Highway Administration.
  • Corporate Authors:

    New York State Department of Transportation

    Engineering Research and Development Bureau, 1220 Washington Avenue
    Albany, NY  USA  12232
  • Authors:
    • Kissane, R J
    • Beal, D B
  • Publication Date: 1975-5

Subject/Index Terms

Filing Info

  • Accession Number: 00125336
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: NYSDOT-ERD-75-RR27 Intrm Rpt.
  • Contract Numbers: Res Project 42-1
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Dec 16 1975 12:00AM