LIVE LOAD ANALYSIS OF BRIDGES MODELLED AS PLANE FRAMEWORKS . DEVELOPMENTS IN STRUCTURAL ENGINEERING. PROCEEDINGS OF THE FORTH RAIL BRIDGE CENTENARY CONFERENCE, HERIOT-WATT UNIVERSITY, ENDINBURGH, SCOTLAND, AUGUST 21-23, 1990. VOLUMES 1 AND 2

This paper presents the results of a parametric study which compares the bending moment influence lines at pier supports for a 3-span, concrete box girder superstructure, supported by concrete wall piers. The study was accomplished by the use of two FORTRAN 77 microcomputer programs compiled on an IBM PC compatible computer. The first, Program, INFLU, generates bending moment influence lines at specific joints for either continuous beam or plane frame structures. The influence line value is computed at tenth points for each structural member. The second program, BOX, generates analysis results for continuous beam or plane frame prestressed concrete box girder bridges, or degenerate cases thereof. Several design parameters were analysed as continuous beam and as plane frames by using these programs. Analysis results include axial forces, shearing forces, bending moments, deflections and concrete stresses at the extreme top and bottom fibres for each structural member at twentieth points. It was found that for shorter span bridges, the difference in bending moments of continuous beams versus plane frames is greater than for longer span bridges and that this difference is significant for shorter spans. (Author/TRRL)

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  • Corporate Authors:

    Spon (E and FN) Limited

    11 New Fetter Lane
    London EC4P 4EE,   England 
  • Authors:
    • Fafitis, A
    • McKellar, J R
  • Publication Date: 1990

Language

  • English

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Filing Info

  • Accession Number: 00609508
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 0-419-15240-7
  • Files: ITRD, TRIS
  • Created Date: Jun 30 1991 12:00AM