FRACTURE SENSITIVITY OF DYNAMICALLY LOADED GIRDERS

The effect of dynamic traffic loads on the brittleness of steel highway bridge girders is found to be considerable if fracture initiation is taken as the criterion of brittleness. The effect on propagation of these fractures is less dramatic. A universal beam section was used for the experiment. It was found that a strain rate increase from 30 x 10 to the minus 6th power per sec to 30 x 10 to the minus 3th power per sec caused a shift of 25 deg C (45 deg F) in the highest temperature for fracture initiation, while the highest temperature for complete fracture at certain strain levels was shifted by only 10 deg C (18 deg F).

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 2523-35
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00129061
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11754 Proceeding
  • Files: TRIS
  • Created Date: Mar 10 1976 12:00AM