FLEXURAL FATIGUE BEHAVIOUR OF PLAIN CONCRETE

The paper describes simple flexural fatigue tests carried out on small concrete beams, simply supported and loaded at the middle third points. Three different types of concrete were used. Preliminary tests were carried out to determine the effect of rate of loading on fatigue performance. The programme covered ages at time of loading up to 5 years with comparable information on static loading up to 10 years. It was concluded that the results of the tests, which covered a wide range of moisture conditions and age, suggest that fatigue behaviour reflects closely the behaviour under conventional "static" loading. For example, increase of strength and stiffness with age result in a proportionate increase in fatigue performance. On the other hand, a decrease in strength resulting from surface drying results in a decrease in fatigue performance. Equally, concrete mixes having an inherently higher flexural strength also have a proportionately higher fatigue strength. The effects of a wide range of mix variables and test conditions can be approximated by a single mean endurance curve in which the fatigue loading is expressed as a proportion of the static flexural strength under the same conditions. This approach can form the basis of a useful practical method of predicting the fatigue performance of concrete under particular combinations of conditions, from a knowledge of its static behaviour under the same conditions. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01604112
• Corporate Authors:

  Pergamon Press, Incorporated

  Headington Hill Hall
  Oxford OX30BW,    
• Authors:
  • Raithby, K D
• Publication Date: 1979

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 269-278
• Serial:
  • Fatigue of Engineering Materials and Structures
  • Volume: 2
  • Publisher: Pergamon Press, Incorporated
  • ISSN: 0160-4112

Subject/Index Terms

• TRT Terms: Admixtures; Age; Aging (Materials); Beams; Compression; Concrete; Concrete curing; Deflection; Fatigue (Mechanics); Fatigue strength; Fatigue tests; Flexural strength; Flint; Limestone; Loads; Modulus of elasticity; Moisture content; Static loads; Stiffness; Strength of materials; Tests
• Uncontrolled Terms: Concrete beams; Flexural fatigue; Loading rate
• ITRD Terms: 5292: Ageing; 3472: Beam; 5532: Compression; 4755: Concrete; 4702: Curing (concrete); 5586: Deflection; 5579: Fatigue (mater); 4170: Flint; 4131: Limestone; 5919: Modulus of elasticity; 5920: Moisture content; 5544: Strength (mater); 6255: Test
• Subject Areas: Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00345028
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jan 29 1982 12:00AM