HEAT-STRAIGHTENING OF DAMAGED STRUCTURAL STEEL IN BRIDGES

A 3-year research effort related to the study of heat-straightening repair for damaged steel bridge girders is summarized. Two major areas are emphasized: laboratory behavior of heat-straightened plates and rolled shapes. During the laboratory investigation of flat plates, a number of parameters were studied, including vee angle, depth of vee, heating temperature, plate thickness, and jacking forces. The msot important parameters influencing the amount of straightening per heating cycle were vee angle, temperature, and jacking force. The patterns of behavior during the straightening process are plotted to illustrate the effects of each of these parameters. In a similar fashion, a laboratory study of rolled sections was conducted. In addition to the same parameters as those affecting plate behavior, this study showed that cross-section shape affects heat-straightening behavior--a factor heretofore unreported in the literature. It appears that rolled shapes can be grouped into three basic modes of behavior depending on the shape and location of the vee. Results of these tests are plotted showing how the shape of the member can affect the straightening process. Recommendations are given for factors to consider in the heat-straightening repair of bridge girders.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1991/1319/1319-010.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=HEAT-STRAIGHTENING+OF+DAMAGED+STRUCTURAL+STEEL+IN+BRIDGES&author=R.+Avent&author=G.+Fadous&author=R.+Boudreaux&publication_year=1991
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1319, Bridge and Hydrology Research 1991. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Avent, R Richard
  • Fadous, George M
  • Boudreaux, Randy J
• Publication Date: 1991

Media Info

• Features: Figures; References;
• Pagination: p. 86-93
• Monograph Title: Bridge and hydrology research 1991
• Serial:
  • Transportation Research Record
  • Issue Number: 1319
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Cross sections; Force; Girders; Heating (Structures); Jacks (Mechanical equipment); Laboratory tests; Recommendations; Repairing; Shape; Straightening; Structural plates; Structural steel; Temperature
• Uncontrolled Terms: Jacking
• Old TRIS Terms: Flat plates; Rolled sections
• Subject Areas: Highways; Maintenance and Preservation; Research; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00621492
• Record Type: Publication
• ISBN: 0309051576
• Files: TRIS, TRB, ATRI
• Created Date: Apr 30 1992 12:00AM