FATIGUE ASSESSMENT OF STEEL BRIDGE DECKS . GROUND ENGINEERING AND BRIDGE RESEARCH. PAPERS PRESENTED AT STRUCTURES 90, TRANSPORT AND ROAD RESEARCH LABORATORY, CROWTHORNE, 25-26 APRIL, 1990

In the UK there are eight long span bridges with steel decks, although few in number, they represent a substantial capital investment, and are of strategic importance to the road network. For steel structures generally, it is estimated that fatigue is a significant factor in 80% of failures. Several factors combine to make orthotropic decks prone to fatigue cracking. These are: (1) high live load stresses; (2) thin plates: and (3) the presence of welded joints. The design requirement is to optimise plate thickness, stiffen shape, and the size and spacing of the stiffeners. The fatigue assessment of orthotropic decks is not covered by the UK bridge design code BS 5400 Part 10/see IRRD 245610), because of the difficulties of defining the relevant stress and the fatigue strength of the welded joints. The Transport and Road Research Laboratory (TRRL) has developed an assessment procedure applicable to orthotropic decks, based on a method given in the design code. Research carried out at TRRL, described in this paper, has concentrated on two areas: (a) stress measurement to determine the local stress at welded joints under traffic loading; and (b) the fatigue classification of welded joints. (TRRL)

  • Availability:
  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • CUNINGHAME, J R
  • Publication Date: 1990

Language

  • English

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Filing Info

  • Accession Number: 00612236
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Aug 31 1991 12:00AM