MODEL ANALYSIS OF TORSIONALLY STIFF BRIDGE DECK

A computer program has been written using equations derived from a method based on the Cusens and Parma (1969) analytical approach for multicell deck structures. A scale model deck made of an epoxy resin has been used to compare predictions with observed deflections for three load positions. The approach is applicable to both torsionally stiff and flexurally stiff decks. Constants can be set to obtain values for the isotropic case and the articulated bridge deck. The FORTRAN program, listed in the paper, can be converted for concentrated loads by allocating a very small value to the patch load dimensions. Computed deflections converge at the fifth harmonic although calculations have been made up to 10 harmonics. Values seem to converge slowly at the centre of the deck. The analytical approach is an effective method for the computation of bending moments, twisting moments, shear forces and deflections due to rectangular path loads placed over a torsionally stiff multicell deck. Computed values, although slightly higher, compare well with measured deflections. Using the program, results for 35 stations can be obtained in 25 minutes for one load position. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1790571
• Corporate Authors:

  Indian Roads Congress

  Jamnagar House, Shahjahan Road
  New Delhi,   India  110 011
• Authors:
  • Yadav, V K
• Publication Date: 1982-10

Media Info

• Features: Figures; References;
• Pagination: p. 29-51
• Serial:
  • Indian Highways
  • Volume: 10
  • Issue Number: 10
  • Publisher: Indian Roads Congress
  • ISSN: 0376-7256

Subject/Index Terms

• TRT Terms: Bending moments; Bridge decks; Computer programs; Concentrated loads; Deflection; Epoxy resins; Equations; Loads; Mathematical models; Scale models; Shear strength; Shear stress; Stiffness; Structural models; Torsion
• Identifier Terms: FORTRAN (Computer program language)
• Uncontrolled Terms: Shear forces
• ITRD Terms: 3482: Bridge deck; 5587: Concentrated loading; 5586: Deflection; 5567: Load; 6473: Mathematical model; 6205: Model (not math); 5531: Shear; 8645: Software; 5931: Stiffness; 5512: Torsion
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00379894
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Mar 30 1984 12:00AM