FATIGUE STRENGTH OF UNSYMMETRICAL PLATE GIRDERS NO. 328.15

STATIC TEST RESULTS OF TWO FULL-SCALE UNSYMMETRICAL PLATE GIRDER SPECIMENS ARE USED FOR THE ANALYSIS OF THE WEB STRESSES WHICH ARE EXPECTED TO DEVELOP IN A GIRDER REPEATED LOADING. THE SIGNIFICANCE OF THESE STRESSES FOR THE FATUGUE LIFE OF UNSYMMETRICAL PLATE GIRDERS IS EVALUATED ON THE BASIS OF AN APPROXIMATE S-N RELATIONSHIP PREVIOUSLY OBTAINED FOR SYMMETRICAL GIRDERS. A METHOD IS DESCRIBED FOR CALCULATING THE PLATE BENDING STRESSES CAUSED BY THE CHANGE IN LATERAL DEFLECTION OF THE WEB. THE MODIFIED SLENDERNESS RATIO OF THE WEB PLATE OF UNSYMMETRICAL PLATE GIRDERS IS PROPOSED AS A TENTATIVE CRITERION FOR LIMITING THE WEB SLENDERNESS. NUMERICAL VALUE FOR THE SLENDERNESS RATIO IS RECOMMENDED TO BE THE SOME AS THAT GIVEN FOR THE SLENDERNESS RATIO OF SYMMETRICAL PLATE GIRDERS; IT IS A FUNCTION OF THE YIELD STRESS OF THE WEB. IT IS ALSO FOUND THAT THE LOAD HISTORY OF THE PANEL INFLUENCES ITS FATIGUE STRENGTH. A STUDY OF THE EFFECT OF CERTAIN GEOMETRICAL AS WELL AS LOADING PARAMETERS ON THE FATIGUE STRENGTH OF PLATE GIRDERS IS RECOMMENDED IN ORDER TO REFINE THIS CRITERION. /AUTHOR/

  • Supplemental Notes:
    • 66-3, Hpr-1 (5)
  • Corporate Authors:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    Lehigh University

    Bethlehem, PA  United States  18015

    Pennsylvania Department of Transportation

    1215 Transportation and Safety Building
    Harrisburg, PA  United States  17120
  • Authors:
    • Parsanejad, S
    • Ostopenko, A
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00207963
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Oct 19 1970 12:00AM