SENSITIVITY ANALYSIS FOR SHORT-SPAN STEEL BRIDGES . 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

The effects of several variables on the optimum design configurations of composite and noncomposite steel bridges are studied in this paper. Spans of up to 100 feet long and different bridge widths were considered. Several graphs and tables are provided to guide designers towards the least costly design. A Vax 11/785 computer is used to obtain data and a Lotus 123 program is used to create bar graphs with an HP plotter. The effect of the following variables on optimum cost are studied: (a) spacing between the beams; (b) influence of different loading types (the HS20, the HS25 and the permit load); (c) concrete strength; (d) the influence of using different types of steel on optimum configuration (two different yield strengths of steel were considered: 36 ksi and 50 ksi); (e) the degree of interaction between concrete and steel; and (f) the influence of provision of lateral bracing. The influence of variation in costs on optimum design were also studied. (TRRL)

  • Availability:
  • Corporate Authors:

    Spon (E and FN) Limited

    11 New Fetter Lane
    London EC4P 4EE,   England 
  • Authors:
    • Mafi, M
  • Publication Date: 1990

Language

  • English

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Filing Info

  • Accession Number: 00609507
  • 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