AN IMPROVED EFFECTIVE CRACK MODEL FOR THE DETERMINATION OF FRACTURE TOUGHNESS OF CONCRETE

This paper presents improved expressions for the calculation of effective notch depth in three-point bend notched specimens used for the determination of the fracture toughness of plain concrete. The improvement is achieved in two ways. First, by using the exact elasticity solution for the midspan deflection of an unnotched beam. Second, by calculating the additional midspan deflection due to the presence of the notch from the corresponding expression for the stress intensity factor of a three-point bend specimen. The predictions of the improved effective crack model are shown to be in good agreement with those of the two-parameter model.(a)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Karihaloo, B L
  • Nallathambi, P
• Publication Date: 1989-7

Language

• English

Media Info

• Pagination: p. 603-610
• Serial:
  • Cement and Concrete Research
  • Volume: 19
  • Issue Number: 4
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Beams; Concrete; Cracking; Deflection; Failure; Forecasting; Mathematical models; Strength of materials
• ITRD Terms: 3472: Beam; 4755: Concrete; 5211: Cracking; 5586: Deflection; 5520: Failure; 132: Forecast; 6473: Mathematical model; 5544: Strength (mater)
• Subject Areas: Materials; Planning and Forecasting;

Filing Info

• Accession Number: 00498620
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM