STUDY OF TRUCK WEIGHTS AND THE CORRESPONDING INDUCED BRIDGE GIRDER STRESSES. PROGRESS REPORT: LOADING HISTORY OF HIGHWAY BRIDGES

EXAMINATION OF THE FIELD DATA, INDUCED GIRDER STRAINS, AND CORRESPONDING VEHICLE TYPE AND GROSS WEIGHT FROM THE TESTING OF A SINGLE GIRDER IN EACH OF FIVE SIMPLY SUPPORTED GIRDER SLAB BRIDGES HAS YIELDED A SERIES OF EMPIRICAL EQUATIONS RELATING INDUCED STRESSES AND VEHICLE GROSS WEIGHTS. THESE EQUATIONS WERE THEN EMPLOYED IN CONJUNCTION WITH LINEAR DAMAGE THEORY AND ESTIMATED VEHICLE WEIGHT AND VOLUME DATA TO PREDICT THE FATIGUE LIFE OF THE FIVE BRIDGE STRUCTURES. A WIDE VARIATION IN PROBABLE FATIGUE LIFE OF THE FIVE BRIDGE GIRDERS RESULTED FROM THIS ANALYSIS. IT SHOULD BE NOTED THAT THE EMPIRICAL EQUATIONS ARE APPLICABLE TO ONLY THOSE GIRDERS WHICH WERE TESTED. THE METHODOLOGY FOR USING THE COLLECTED LOAD HISTORY DATA TO DEVELOP EQUATIONS, WHICH CAN BE USED IN FATIGUE ANALYSIS, IS PROMISING. ADDITIONAL DATA ARE CERTAINLY REQUIRED IN ORDER TO PROVIDE SOME DEGREE OF CONFIDENCE IN THESE EMPIRICAL EQUATIONS. FURTHER FIELD TESTS OF ALL GIRDERS OF A BRIDGE, WOULD PERMIT EMPIRICAL RELATIONSHIPS BETWEEN GIRDER AND SYSTEM RESPONSE. ALSO, TESTS ON BRIDGES WITH LONGER SPANS AND BRIDGES WHICH ARE SUBJECTED TO GREATER TRAFFIC VOLUMES SHOULD BE PURSUED. /AUTHOR/

  • Corporate Authors:

    University of Maryland, College Park

    Department of Civil and Environmental Engineering
    College Park, MD  USA  20742
  • Authors:
    • Khosa, R L
    • Heins, C P
  • Publication Date: 1971-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 90 p.
  • Serial:
    • Issue Number: 40

Subject/Index Terms

Filing Info

  • Accession Number: 00209724
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 3 1972 12:00AM