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

doi:10.1016/0013-7944(95)00080-F

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

Civil and Environmental Engineering

Research output: Contribution to journal › Article › peer-review

23 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 language	English (US)
Pages (from-to)	987-997
Number of pages	11
Journal	Engineering Fracture Mechanics
Volume	52
Issue number	6
DOIs	https://doi.org/10.1016/0013-7944(95)00080-F
State	Published - Dec 1995

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1016/0013-7944(95)00080-F

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title = "Cohesive crack modeling of influence of sudden changes in loading rate on concrete fracture",

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.",

author = "S. Tandon and Faber, {K. T.} and Ba{\v z}ant, {Zden{\v e}k P.} and Li, {Yuan N.}",

note = "Funding Information: Acknowledgements--This experimental work was supported by the Center for Advanced Cement-Based Materials at Northwestern University. Further support for the theoretical formulation has been obtained under NSF grant MSS 9114476 for Northwestern University.",

year = "1995",

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doi = "10.1016/0013-7944(95)00080-F",

language = "English (US)",

volume = "52",

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T1 - Cohesive crack modeling of influence of sudden changes in loading rate on concrete fracture

AU - Tandon, S.

AU - Faber, K. T.

AU - Bažant, Zdeněk P.

AU - Li, Yuan N.

N1 - Funding Information: Acknowledgements--This experimental work was supported by the Center for Advanced Cement-Based Materials at Northwestern University. Further support for the theoretical formulation has been obtained under NSF grant MSS 9114476 for Northwestern University.

PY - 1995/12

Y1 - 1995/12

N2 - 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.

AB - 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.

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

Abstract

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