Cohesive crack modeling of influence of sudden changes in loading rate on concrete fracture

S. Tandon*, K. T. Faber, Zdeněk P. Bažant, Yuan N. Li

*Corresponding author for this work

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

The results of an experimental study of a sudden change in loading rate on the fracture behavior of normal- and high-strength concrete specimens of three different sizes are reported. Geometrically similar three-point bend specimens were subjected to either a sudden 1000-fold increase or a 10-fold decrease of the loading rate. It was observed that for a large increase of the loading rate, the post-peak softening can be reversed to hardening followed by a second peak of the stress-strain diagram. A sudden decrease of the loading rate initially causes, a steeper softening slope of this diagram. The results are similar for normal and high strength concrete specimens. The viscoelastic cohesive crack model with the rate-dependent softening law is used to model the experimental results.

Original languageEnglish (US)
Pages (from-to)987-997
Number of pages11
JournalEngineering Fracture Mechanics
Volume52
Issue number6
DOIs
StatePublished - Dec 1995

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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