FATIGUE CHARACTERISTICS OF PRESTRESSING STRAND

THIS PAPER PRESENTS THE RESULTS OF 189 FATIGUE TESTS CARRIED OUT ON 12.7 MM DIAMETER THERMALIZED SEVEN-WIRE PRESTRESSING STRAND. THE EFFECT OF TEST LENGTH AND/OR LATERAL PRESSURE ON THE FATIGUE LIFE AT VARIOUS STRESS AMPLITUDES IS REPORTED TOGETHER WITH AN INVESTIGATION OF THE EFFECTS OF ABRASION. THE STATISTICAL TESTS CARRIED OUT, THE STATISTICAL SIGNIFICANCE OF THE RESULTS, AND THE REGRESSION ANALYSES PERFORMED ON EACH OF THE NINE SERIES OF TESTS ARE PRESENTED. THE DIFFERENT TYPES OF INITIATION OF WIRE FRACTURE ARE REPORTED AND THEIR INCIDENCE IS EXAMINED IN CONJUNCTION WITH THE FATIGUE LIFE OBTAINED. A REDUCTION OF UP TO 57% OF THE FATIGUE LIFE OF STRAND TESTED FREE IN AIR WAS OBTAINED BY SUITABLY ADJUSTING THE TEST LENGTH AND APPLYING A LATERAL PRES- SURE IN A SIMILAR MANNER TO THAT TO WHICH STRANDS IN BEAMS MIGHT BE SUBJECTED. /AUTHOR/TRRL/

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 323-36
  • Serial:
    • Volume: 53

Subject/Index Terms

Filing Info

  • Accession Number: 00210208
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Oct 9 1973 12:00AM