PRESTRESSING: PART 3. LOSS OF PRESTRESS. CURRENT PRACTICE SHEET 2P/19/1, NO 43

Losses in the prestressing force applied to a structural member occur during and after the stressing operation for various reasons. It is considered that the sources of loss of prestress can be conveniently divided into two groups; those which occur during the stressing operation, and those which are time-dependent during the subsequent life of the structure. Bearing in mind that the sources of loss are known, this article outlines the current techniques employed to quantify such losses. Losses during stressing are discussed by reference to friction in the jack and Anchorage, friction in the duct, lock-off and elastic shortening. Losses after stressing are considered by reference to steel relaxation, concrete creep and concrete shrinkage. Parts 1, 2 and 4 of this current practice sheet appear in the May, June and AUgust 1929 Issues of Concrete (Lond). (TRRL)

  • Availability:
  • Corporate Authors:

    Cement and Concrete Association

    Wexham Spring
    Slough SL3 6PL, Buckinghamshire,   England 
  • Publication Date: 1979-7

Media Info

  • Features: Figures;
  • Pagination: p. 31-2
  • Serial:
    • CONCRETE
    • Volume: 13
    • Issue Number: 7
    • Publisher: THE CONCRETE SOCIETY
    • ISSN: 0010-5317

Subject/Index Terms

Filing Info

  • Accession Number: 00310295
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jul 22 1980 12:00AM