Flexural Behavior of Two-Span Continuous Prestressed Concrete Girders With Highly Eccentric External Tendons

The flexural strength of beams prestressed with external tendons is comparatively lower than that of members with internal bonded tendons. One possible method of increasing the flexural strength of such beams is to place the tendons at high eccentricity. This article reports on a study of single-span and two-span continuous beams. The study was undertaken to obtain an insight into the flexural behavior of beams with highly eccentric tendons. The test variables include external tendon profile, loading pattern on each span, casting method, and confinement reinforcements. The results showed that continuous girders with linearly transformed tendon profiles exhibit the same flexural behavior irrespective of tendon layout. The presence of confinement reinforcement enhances the ductility behavior but does not increase the ultimate flexural strength. The degree of moment redistribution is affected by the tendon layout and the loading pattern on each span. The authors discuss the implications of these results for design methodology and codes.

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  • Authors:
    • Aravinthan, Thiru
    • Witchukreangkrai, Eakarat
    • Mutsuyoshi, Hiroshi
  • Publication Date: 2005-5

Language

  • English

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Filing Info

  • Accession Number: 01000384
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 25 2005 8:26AM