BEHAVIOR OF COMPOSITE STEEL BRIDGE BEAMS SUBJECTED TO VARIOUS POSTTENSIONING SCHEMES

An initial investigation phase of research on strengthening continuous composite bridges by posttensioning has been completed; results are summarized. The effects of various posttensioning schemes were investigated on a one-third-scale continuous three-span composite bridge model. Although various tests performed on the bridge model verified that positive and negative moment regions of continuous composite bridges could be strengthened by posttensioning, the model size prevented the testing of different tendon profile shapes and the necessary hardware. Thus, the primary objective of this research was to investigate the effectiveness of various posttensioning schemes applicable to the negative moment regions of continuous composite bridges through the testing of a full-scale laboratory model. The model was subjected to four different posttensioning tendon configurations with and without the use of strengthening angles. Data from the various tests were compared to the unstrengthened model to determine the more effective posttensioning arrangement. Data from the various tests were also used to determine the extent of composite action remaining after the concrete deck cracked.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1989/1223/1223-008.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=BEHAVIOR+OF+COMPOSITE+STEEL+BRIDGE+BEAMS+SUBJECTED+TO+VARIOUS+POSTTENSIONING+SCHEMES&author=W.+Wiley&author=F.+Klaiber&author=K.+Dunker&publication_year=1989
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1223, Bridge Design and Performance and Composite Materials. 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:
  • Wiley, William E
  • Klaiber, F Wayne
  • Dunker, Kenneth F
• Publication Date: 1989

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 63-72
• Monograph Title: Bridge design and performance and composite materials
• Serial:
  • Transportation Research Record
  • Issue Number: 1223
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Beams; Bridges; Composite materials; Continuous structures; Measures of effectiveness; Posttensioning; Scale models; Strength of materials; Structural strengthening
• Uncontrolled Terms: Composite beams; Effectiveness; Model tests; Negative moment region
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00494745
• Record Type: Publication
• ISBN: 0309048206
• Files: TRIS, TRB
• Created Date: Jun 30 1990 12:00AM