THE DEVELOPMENT OF THE ONTARIO HIGHWAY BRIDGE DESIGN CODE

At the end of 1975, the Ontario Ministry of Transportation and Communications decided to develop a Code for designing Ontario's highway bridges. Structural research in the Ministry, which began in 1969, has been successful in clarifying several aspects of structural behavior and load-carrying capacity. The activities concentrated on proof-testing existing bridges of questionable strength, inspecting and recording a large number of structures for various common faults; many the result of inadequate design practices. The resulting Ontario Highway Bridge Design Code is based on the existing AASHTO Specifications, but with most provisions for working stress design eliminated. For both serviceability and ultimate limit states, an upper-bound representation of all commercial vehicles observed in Ontario through various load surveys is employed. The use of deflection and stiffness criteria has been re-evaluated for each structural material. Impact and dynamic response is treated as a function of resonance frequencies. While introducing provisions for 0.3% deck reinforcement, crack control is made mandatory. The Code will discourage the use of single load path structures. New provisions on hydrology, drainage and various dimensional requirements are intended to achieve low maintenance structures. New sections are devoted to nontraditional analysis, soil-steel structures and the evaluation of existing bridges. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 1-12
  • Monograph Title: Bridge Engineering. Volume 2
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00183774
  • Record Type: Publication
  • ISBN: 0309026970
  • Files: TRIS, TRB
  • Created Date: Dec 12 1978 12:00AM