ANALYSIS OF ACCIDENTS OCCURRING DURING OR AFTER PRESTRESSING /IN FRENCH/

THE ECONOMIC FACTORS LEADING TO THE SELECTION OF HIGH- STRENGTH STEEL CAPABLE OF WITHSTANDING VERY HIGH INITIAL TENSILE STRESSES AND HIGH COMPRESSIVE STRENGTH CONCRETE IN THE MANUFACTURE OF PRESTRESSED CONCRETE ELEMENTS ARE RECALLED. DETAILS ARE GIVEN OF POSSIBLE MISHAPS DURING PRETENSIONING: RUPTURE OF WIRES OR CABLES, CRUSHING OF CONCRETE UNDER ANCHORAGE SYSTEMS, LONGITUDINAL CRACKING OF THE END OF THE BEAM, AND MOVEMENTS OF PRESTRESSING CABLES TO AN OFF-CENTER POSITION. PREVENTIVE MEASURES ARE OUTLINED. DELAYED MISHAPS OCCURRING DURING THE SERVICE LIFE OF STRUCTURES ARE ALSO MENTIONED, AND THE DIFFICULTY OF SOLVING THE PROBLEM OF DELAYED DEFORMATIONS CAUSED BY COMBINED CREEP AND RELAXATION IS DISCUSSED TOGETHER WITH THE DAMAGE RESULTING FROM INSUFFICIENT PRESTRESSING, FREEZING WATER IN DUCTS SUBJECTED TO GROUTING, DEFECTIVE GROUTING, AND TENSILE CORROSION OF THE PRESTRESSING STEEL. /LCPC/RRL/

  • Supplemental Notes:
    • No 40, pp 7-12, 8 PHOT
  • Authors:
    • Hossard, C
  • Publication Date: 1969-9

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Filing Info

  • Accession Number: 00215005
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Feb 12 1971 12:00AM