DISPLACEMENTS AND LOSSES IN MULTISTAGE PRESTRESSED MEMBERS

This paper presents a numerical procedure to calculate the loss of prestress the strain at centroid, and the curvature in concrete beams prestressed in a number of stages. The loss calculated is caused by instantaneous deformations, relaxation of steel, shrinkage, and creep of concrete. Account is made of the elastic and creep recoveries of concrete and the effect of variation of stress level on the relaxation of steel. Included is an application to find the losses and deflections of a prestressed concrete bridge built by the cantilever method (consecutive segments cast and prestressed in multistages).

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Ghali, A
  • Sisodiya, R G
  • Tadros, G S
• Publication Date: 1974-11

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 2307-22
• Serial:
  • Journal of the Structural Division
  • Volume: 100
  • Issue Number: ST11
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Beams; Curvature; Dislocation (Geology); Elasticity (Mechanics); Mechanical relaxation; Numerical analysis; Prestressed concrete; Prestressing; Shrinkage
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00264777
• Record Type: Publication
• Report/Paper Numbers: Proc. Paper 10968
• Files: TRIS
• Created Date: Feb 11 1975 12:00AM