Numerical investigation of the bilinear softening law in the cohesive crack model for normal-strength and high-strength concrete

X. Guo, R.K.L. Su, Ben Young

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)


A powerful methodology in concrete fracture research is the cohesive crack model with a bilinear softening law, where both the energy and the stress ratios play important roles. Here a direct numerical approach based on the intrinsic cohesive crack model was employed in fracture analysis of normal-strength and high-strength concrete specimens. The best-fit energy ratio is found to be consistent with that reported by Bazant and Becq-Giraudon while varying over a narrower range. The best-fit stress ratio is found to be larger than all of the results from the inverse analysis. It is recommended that the softening law for high-strength concrete had a larger stress ratio.
Original languageEnglish
Pages (from-to)373-387
Number of pages15
JournalAdvances in Structural Engineering
Issue number3
Publication statusPublished - 1 Mar 2012
Externally publishedYes


  • bilinear softening law
  • concrete fracture
  • energy ratio
  • intrinsic cohesive crack model
  • stress ratio

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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