CREEP, SHRINKAGE AND ELASTIC STRAIN IN CONCRETE BRIDGES IN THE UNITED KINGDOM, 1963-71

Long-term creep and shrinkage measurements carried out on concrete bridges in England in the period 1963-71 are summarized. The concretes used were mainly of the 50 n/sq mm class. Typically, on the full scale, shrinkage was shown to be about 0.0002 and the creep factor, defined as the ratio of creep to elastic strain to time infinity at the centroid of a prestressed concrete member for a decaying prestressing force, to be about 2.0. The most likely cause of cracking soon after casting was shown to be the early-age thermal movement caused by the hydration of the cement. Results show that creep and shrinkage usually increase linearly with the logarithm of time, with cyclic seasonal variations. The effect of the seasons upon the calculation of movements is discussed. /Author/TRRL/

  • Availability:
  • Corporate Authors:

    An Foras Forbartha

    St Martin's House, Waterloo Road
    Dublin 4,   Ireland 
  • Authors:
    • TYLER, R G
  • Publication Date: 1976-6

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 55-84
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00147499
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Jun 22 1977 12:00AM