A SIMPLE APPROACH TO TRUSS DEFLECTIONS

Axial-load fatigue tests over stress ranges of 40 and 50 ksi (276 and 345 MPa) were conducted on specimens having a laminar midthickness discontinuity that terminated either in plain material or in a transverse double-vee-groove weld. A few comparison tests were conducted on specimens of the same material not having an apparent midplane discontinuity, and data from previous tests on material with approximately the same tensile strength were reviewed. Although the discontinuity was severe, no failures were initiated by extension of the discontinuity. For both the welded and the unwelded specimens, the fatigue life of specimens with and without a discontinuity was similar. The fatigue life of both types of welded and unwelded specimens was slightly less than that determined in previous tests, but the scatter bands from the various sets of data overlap. A laminar discontinuity does not appear to significantly affect the fatigue life of a plate loaded in tension parallel with the discontinuity.

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  • Find a library where document is available. Order URL: http://worldcat.org/issn/00138029
• Corporate Authors:

  American Institute of Steel Construction

  101 Park Avenue
  New York, NY  United States  10017
• Authors:
  • Tsai, W T
• Publication Date: 1976

Media Info

• Features: Figures; References;
• Pagination: p. 76-81
• Serial:
  • Engineering Journal
  • Volume: 13
  • Issue Number: 3
  • Publisher: American Institute of Steel Construction
  • ISSN: 0013-8029

Subject/Index Terms

• TRT Terms: Axial loads; Fatigue (Mechanics); Fatigue strength; Fatigue tests; Laminar flow; Structural plates; Tensile strength; Trusses
• Uncontrolled Terms: Discontinuity; Fatigue life; Plates
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00150432
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 27 1977 12:00AM