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/

• Corporate Authors:

  Institution of Civil Engineers

  One Great George Street, Westminster
  London,   United Kingdom  SW1P 3AA
• Authors:
  • DOWLING, P J
  • Bawa, A S
• Conference:
  • Institution of Civil Engineers, Proceedings
• Publication Date: 1975-3

Language

• English

Media Info

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

Subject/Index Terms

• TRT Terms: Bridge decks; Computers; Cross sections; Deflection; Design; Digital computers; Finite differences; Mathematical models; Methodology; Orthotropic; Orthotropic plates; Steel; Stiffener plates; Stringers; Tests
• Uncontrolled Terms: Models
• Old TRIS Terms: Stiffener
• ITRD Terms: 3482: Bridge deck; 6404: Cross section; 9011: Design (overall design); 8673: Digital computer; 6460: Finite difference method; 6205: Model (not math); 3490: Orthotropic plate; 4542: Steel; 3435: Stiffener (bridge); 6255: Test
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

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