HORIZONTALLY CURVED CONTINUOUS POST-TENSIONED CONCRETE BEAMS

Torsional effects are highly significant in beams which are curved in plane, even when the applied loading is symmetrical about the centerline of the beam. In a sharply curved beam, the induced torsional moments may in fact control the cross-sectional dimensions or the shear reinforcement in the beam. Two methods are presented whereby torsional moments in curved, continuous, post- tensioned concrete beams may be controlled. The first method entails a redistribution of induced torsional moments by the use of torque-free, eccentric, internal supports. The second method relates to the introduction of radial eccentricity in the profile of the prestressing cables. In both methods the eccentricity is considered with respect to the centerline of the beam. The overall effect is to "balance out" a predetermined portion of the torsional moments induced by the permanent service loading.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08879672
• Corporate Authors:

  Prestressed Concrete Institute

  20 North Wacker Drive
  Chicago, IL  United States  60606
• Authors:
  • Campbell, T I
  • Chitnuyanondh, L
• Publication Date: 1975-3

Media Info

• Pagination: p. 58-71
• Serial:
  • PRECAST/PRESTRESSED CONCRETE INSTITUTE. JOURNAL
  • Volume: 20
  • Issue Number: 2
  • Publisher: Precast/Prestressed Concrete Institute
  • ISSN: 0887-9672

Subject/Index Terms

• TRT Terms: Beams; Concrete; Continuous structures; Curvature; Curved beams; Eccentricity; Loads; Posttensioning; Torsion
• Uncontrolled Terms: Concrete beams; Continuous beams; Horizontal curvature; Loading
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00097036
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 27 1975 12:00AM