FATIGUE STRENGTH OF COLD-WORKED NON-PRESTRESSED REINFORCEMENT IN PRESTRESSED CONCRETE BEAMS

Fourteen identical beams with limited prestress were tested to fatigue failure under different ranges of cyclic loading and the results used to derive the modified Goodman diagram for a 10 mm cold-worked deformed bar acting as non-prestressed reinforcement. The diagram was checked against the results of tests of two beams with different amounts of reinforcement and prestress. Two further beams which were tested under service loading conditions had not failed nor developed excessive deflection or width of cracks after 2 million cycles of load. The implications of the results for the design of "class 3" prestressed concrete members are discussed. /Author/TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00249831
• Corporate Authors:

  Cement and Concrete Association

  Wexham Spring
  Slough SL3 6PL, Buckinghamshire,   England 
• Authors:
  • Bennett, E W
  • Joynes, H W
• Publication Date: 1979-3

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 13-18
• Serial:
  • MAGAZINE OF CONCRETE RESEARCH
  • Volume: 31
  • Issue Number: 106
  • Publisher: Thomas Telford Limited
  • ISSN: 0024-9831

Subject/Index Terms

• TRT Terms: Beams; Cold working; Cracking; Failure; Fatigue strength; Fracture mechanics; Loads; Material reinforcement; Mechanical fatigue; Metal bars; Prestressed concrete; Prestressing; Reinforcing materials; Repeated loads; Steel; Tests; Width
• ITRD Terms: 3461: Bar; 3472: Beam; 5211: Cracking; 5520: Failure; 5579: Fatigue (mater); 5567: Load; 4796: Prestressed concrete; 3471: Reinforcement (in mater); 5588: Repetitive loading; 4542: Steel; 6255: Test
• Subject Areas: Bridges and other structures; Design; Highways; Materials; Planning and Forecasting; I24: Design of Bridges and Retaining Walls; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00196921
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Sep 15 1979 12:00AM