INFLUENCE SURFACES FOR ORTHOTROPIC STEEL BRIDGE DECKS

An analytical method to produce influence surfaces for stiffened steel bridge decks is described. It uses dynamic relaxation to solve the finite difference form of the orthotropic small deflexion plate equations and employs A variable orthogonal mesh to ensure maximum economy of computer time and storage. The theoretical influence surfaces show good agreement with ones derived experimentally on quarter scale models of the two most common types of steel deck. Both the experimental and theoretical results show also that the use of torsionally strong stringers rather than torsionally weak stringers can reduce the maximum stringer bending stresses by up to 50% for decks of approximately the same weight. It is suggested that the computerized method presented can be used to produce design charts which could significantly reduce the time taken by designers in the design and analysis of orthotropic steel bridge decks. (A) /TRRL/

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 149-168
  • Serial:
    • Volume: 59
    • Issue Number: 2

Subject/Index Terms

Filing Info

  • Accession Number: 00127917
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Dec 29 1975 12:00AM