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).

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Mansell, D S
  • Dobos, P
• Publication Date: 1975-12

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 2523-35
• Serial:
  • Journal of the Structural Division
  • Volume: 101
  • Issue Number: ST12
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Brittleness; Dynamic loads; Fracture mechanics; Girder bridges; Highway bridges; Mechanical strain; Traffic loads
• Uncontrolled Terms: Fracture; Strain rate
• Subject Areas: Bridges and other structures; Freight Transportation; Highways;

Filing Info

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