PRESTRESSING FORCE INCREMENT OF TWO-SPAN STEEL GIRDER

This paper analyzes the influence of prestsressing force increment and the induced negative bending moment in two-span girder bridges prestressed by external tendons (cables of high strength steel). The proposed analysis is based on the flexibility method. The deformations are calculated by the virtual work method. The analysis is limited to elastic stage only. The equations for calculating the prestressing force increment and the bending moment at the middle support are derived. Numerical examples are solved and the results are compared with those of similar nonprestressed girders. The influence lines are prepared and evaluated for a continuous girder of two equal spans of 60 m in length.

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  • Corporate Authors:

    National Research Council of Canada

    Research Journals
    Ottawa, Ontario K1A 0R6,   Canada 
  • Authors:
    • Troitsky, M S
    • Zielenski, Z A
    • Rabbani, N F
  • Publication Date: 1991-4

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Filing Info

  • Accession Number: 00609924
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Jun 30 1991 12:00AM