High Performance Steel Enhances the Fatigue and Fracture Resistance of Steel Bridge Structures

Studies on the use of high performance steel with higher yield strength suggest that fatigue is one of the barriers to effective use of high performance steel, primarily due to fatigue-susceptible details. This review article summarizes the available studies on the fatigue and fracture behavior of high performance steel. The authors focus on test results from two high performance steels: HPS-A485W and HSLA-80. The test results on these steels are compared with studies on carbon-manganese steels. The results demonstrate the applicability of the existing fatigue design provisions as the fatigue limit state remains essentially the same. However, the high fracture resistance of HPS steels is shown to eliminate traditional cleavage (brittle) fracture. Fatigue enhancement of traditional low fatigue resistant details such as attachments and coverplates is a feasible means of increasing the fatigue resistance of HPS steels. Earlier improvement techniques such as air-hammer peening and gas tungsten arc remelting have demonstrated that these procedures can greatly enhance the fatigue resistance of fatigue-damaged bridge members with coverplated beams. The authors briefly comment on new shapes, using corrugated or composite webs, that are being evaluated on full-scale prototype HPS steel members.

  • Authors:
    • Fisher, John W
    • Wright, William J
  • Publication Date: 2001-6

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01042715
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 10 2007 9:48AM