FATIGUE TESTS ON PARTIALLY PRESTRESSED CONCRETE BEAMS

This report presents the results of constant cycle and cumulative damage fatigue tests which were carried out on six partially prestressed concrete flexural members. The main test variable was the repeated load cycle. A significant change in beam response in the post-cracking range was observed to occur as the result of fatigue loading. Increases in flexural deformation (curvature) strains and midspan deflections, of the order of 30 to 40 per cent, occurred between the first load cycle and the first steel fracture. Overall beam stiffness was reduced correspondingly. Hysteretic effects were significant in the early load cycles, and were greatest in the first loading-early load cycles, and were greatest in the first loading-unloading cycle. Fatigue failure took place by successive fracture of the elements of tensile steel reinforcement, the prestressing steel, or of both steels. None of the beams failed by fatigue of the compressive concrete. (Author/TRRL)

• Corporate Authors:

  University of Adelaide

  Department of Civil and Environmental Engineering
  Adelaide, South Australia  Australia  5005
• Authors:
  • Foo, M H
  • WARNER, R F
• Publication Date: 1984-3

Media Info

• Features: Figures; References; Tables;
• Pagination: 62 p.
• Serial:
  • Issue Number: R 64

Subject/Index Terms

• TRT Terms: Accelerated tests; Beams; Bridge members; Concrete; Deflection; Deformation; Fatigue tests; Flexure; Fracture mechanics; Hysteresis; Material reinforcement; Mechanical strain; Prestressed concrete; Prestressing; Repeated loads; Steel; Stiffness
• Uncontrolled Terms: Fracture; Partial prestressing
• Old TRIS Terms: Prestressed steels; Strains
• ITRD Terms: 3472: Beam; 5211: Cracking; 1614: Damage; 5586: Deflection; 5595: Deformation; 2870: Degree of curvature; 5579: Fatigue (mater); 5449: Hysteresis; 5410: Moment (force); 4796: Prestressed concrete; 5588: Repetitive loading; 4542: Steel; 5931: Stiffness; 6255: Test
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00389919
• Record Type: Publication
• Source Agency: ARRB
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS, ATRI
• Created Date: Nov 30 1984 12:00AM