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Cohesive crack modeling of influence of sudden changes in loading rate on concrete fracture
The results of an experimental study of a sudden chance 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 increase 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 experimental results.
Cohesive crack modeling of influence of sudden changes in loading rate on concrete fracture
The results of an experimental study of a sudden chance 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 increase 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 experimental results.
Cohesive crack modeling of influence of sudden changes in loading rate on concrete fracture
Die Analyse der Auswirkung plötzlicher Änderungen der Belastungsgeschwindigkeit auf das Bruchverhalten von Beton mittels des Modells kohäsiver Risse
Tandon, S. (author) / Faber, K.T. (author) / Bazant, Z.P. (author) / Li, Y.N. (author)
Engineering Fracture Mechanics ; 52 ; 987-997
1995
11 Seiten, 8 Bilder, 2 Tabellen, 24 Quellen
Article (Journal)
English
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