Service stresses in a composite steel and concrete girder bridge, 11.3 M in span, have been monitored continuously for 117 days. The major results of this study and, more particularly, the dynamic behaviour of the bridge are briefly discussed. It describes also a special impact study. It is shown that stresses due to live load may be as high as 2.32 times those calculated by a static analysis, and that high impact values may occur for both light and heavy vehicles. Many of the service records include high amplitudes of stress fluctuation at a frequency of 10-12 hz, corresponding to the first natural frequency of the bridge. It is believed that these are due to axle hop. Smoothing of the records to remove this component still leaves high impact values in some cases. Rain flow counts and strain rates are also reported. (TRRL)

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 192-196
  • Serial:
    • Issue Number: 83/3

Subject/Index Terms

Filing Info

  • Accession Number: 00387147
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 0-85825-183-3
  • Files: ITRD, TRIS, ATRI
  • Created Date: Aug 30 1984 12:00AM