EFFECTS OF RATE LOADING ON FLEXURAL STRENGTH AND FATIGUE PERFORMANCE OF CONCRETE

Results are given of an investigation into the relationship between the flexural strength and the rate of increase of extreme fibre stress of small beam specimens of two concretes. In additiona, a limited investigation was made to determine the effect of rate of loading upon the fatigue performance, and the latter was related to the flexural strength at comparable stressing rates. The flexural strength was shown to be highly dependent upon rate of loading. At rates of loading approximating to the rates at which stress is applied in fatigue tests at 20 hz, flexural strengths were about 50 percent higher than those obtained under loading rates specified in the current British standard flexural tests. No significant differecne in fatigue performance was found in repeated loading tests on one concrete at loading frequencies of 4 hz and 20 hz. /Author/

• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • Galloway, J W
  • Raithby, K D
• Publication Date: 1973

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Beams; Concrete; Concrete tests; Deflection; Durability; Fatigue (Mechanics); Flexural strength; Loads; Stresses
• Uncontrolled Terms: Concrete beams; Loading rate
• ITRD Terms: 4755: Concrete; 5586: Deflection; 5910: Durability; 5579: Fatigue (mater); 6997: Frequency; 5567: Load; 5588: Repetitive loading; 5544: Strength (mater); 5575: Stress (in material); 6255: Test
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00081942
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: No. LR 547 R&D Rpt.
• Files: ITRD, TRIS
• Created Date: Apr 22 1975 12:00AM