In recent years, welded steel bridges seem to have experienced more unexpected and damaging fractures than have other types of bridge structures. One problem occurs when cracks beginning at small imperfections grow slowly to a critical size and then grow very rapidly, causing a fracture. Intensive investigations and research have shown that one of several causes of this problem is fatigue cracking at welded steel details and that fatigue crack growth is influenced by many factors, including the range of stress between minimum and maximum loading, the quality of welding and the care with which details and local displacements are considered in design. /Author/

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  • Accession Number: 00179730
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 12 1978 12:00AM