Computers and Concrete

  • 제22권1호
  • /
  • Pages.39-51
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  • 2018
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

An efficient algorithm for scaling problem of notched beam specimens with various notch to depth ratios

  • Karamloo, Mohammad (Department of Civil Engineering, Shahid Rajaee Teacher Training University) ;
  • Mazloom, Moosa (Department of Civil Engineering, Shahid Rajaee Teacher Training University)
  • 투고 : 2017.12.12
  • 심사 : 2018.04.13
  • 발행 : 2018.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

This study introduces a new algorithm to determine size independent values of fracture energy, fracture toughness, and fracture process zone length in three-point bending specimens with shallow to deep notches. By using the exact beam theory, a concept of equivalent notch length is introduced for specimens with no notches in order to predict the peak loads with acceptable precisions. Moreover, the method considers the variations of fracture process zone length and effects of higher order terms of stress field in each specimen size. In this paper, it was demonstrated that the use of some recently developed size effect laws raises some concerns due to the use of nonlinear regression analysis. By using a comprehensive fracture test data, provided by Hoover and Bazant, the algorithm has been assessed. It could be concluded that the proposed algorithm can facilitate a powerful tool for size effect study of three-point bending specimens with different notch lengths.

키워드

참고문헌

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