SOME THOUGHTS ON CABLE BRIDGE DESIGN . 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 attempts to show that suspension bridges can still compete with girder and cable stayed bridges for smaller span ranges. A comparison of cable stayed and suspension bridges is made, listing some advantages and disadvantages of both. The asset of greater stiffness attributed to the cable stayed bridge, like its higher resistance to concentrated loads, is irrelevant except for the railway bridges. In cable stayed bridges, these are accompanied by alternating stresses in the stay cables which reach magnitudes that far exceed those occurring in the main cables of extension bridges. Even the main supporting cables of suspension bridges can be designed for replacement under traffic loading. Where the deformation of the suspension bridge under concentrated loads do constitute a problem, it can be effectively strengthened by providing additional stay cables. The real asset of the cable stayed bridge is that it can be erected by free cantilevering while still remaining self anchored in respect of the horizontal components of the cable forces. Economically, therefore, suspension bridges only compare favourably to cable stayed bridges where conditions are such that the conventional mode of falsework construction is neither prohibitively expensive nor unacceptable because of undue interference with traffic. These conditions are usually met for foot bridges. Examples of short span suspension bridge designs are provided, and include: (a) Rosenstein Park footbridges, Stuttgart; (b) the Max-Eyth Bridge over the river Neckar, Stuttgart; (c) 487 m span Williamsburg bridge, New York, and (d) various footbridges in Stuttgart, Berching, and Bad Windshem. (TRRL)

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  • Corporate Authors:

    Spon (E and FN) Limited

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

Language

  • English

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Filing Info

  • Accession Number: 00609499
  • 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