METHODS OF ANALYSIS OF CONCRETE BOX GIRDER BRIDGES

Six methods (equivalent beam, beam on elastic foundation, equivalent grid, folded plate, finite strip, and finite element) for the analysis of box-girder bridges are presented, and their application to a series of four example structures of increasing complexity is compared. The longitudinal and transverse stresses and deflections for all applications are analyzed. The finite element method consistently gave the best agreement with experimental results. Similar accuracy was achieved by the folded plate and finite strip methods. However, some exceptions were observed when close to concentrated loads. Improvements can be achieved by spreading the load over a small but finite area and increasing a number of harmonics in the load series "The approximate" methods-equivalent grid and beam on elastic foundation gave similar results from widely different physical models. Although not as accurate as the previous methods, the results are adequate for straight boxes or those with slight curvature. The equivalent beam model was the least accurate method.

  • Availability:
  • Supplemental Notes:
    • Volume 1, Bridge Seminar 1978.
  • Corporate Authors:

    National Roads Board, New Zealand

    P.O. Box 12-041
    Wellington,   New Zealand 
  • Authors:
    • Buckle, I G
    • Priestley, MJN
  • Publication Date: 1979

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00311083
  • Record Type: Publication
  • Report/Paper Numbers: RRU Bulletin 41
  • Files: TRIS, ATRI
  • Created Date: Jun 9 1980 12:00AM