HAUNCHED BRIDGES AND THE SUCKER DECK PRINCIPLE: BENEFICIALLY VARYING DECK DEPTH TO MATCH HEADROOM OVER OBSTACLE CROSSED

The paper shows how sucker deck bridge haunches may be so arranged as to locate the minimum deck depth over the highest point of the headroom envelope of the obstacle crossed by the bridge. As this minimum deck depth is less than the depth of a conventional uniform depth deck crossing the same obstacle, the sucker deck bridge gains through reduced rise and length, with attendant economies. After the advantages of bridge rise reduction have been demonstrated, the paper describes the moment and stress savings associated with sucker decks. It then shows how appropriate forms of sucker decks can be fashioned for various headroom envelopes to effect savings in bridge rises to advantage. The further benefits of weight savings associated with sucker decks, which are usually more efficient and easier to construct than voided decks, together with the aesthetic gains possible, are also described. The paper is illustrated with examples of sucker bridges, particularly UK motorway overbridges.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 39-50
  • Serial:
    • Volume: 104
    • Issue Number: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00663271
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Aug 24 1994 12:00AM