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Fracture Mechanics of an Elastic Softening Material like Concrete
TLDR
In this article, a discrete crack is considered with softening zones at the crack tips, and closed stresses are applied to the crack faces in the softening zone, described by a power function.Abstract:
Concrete is modelled as a linear elastic softening material and introduced into fracture mechanics. A discrete crack is considered with softening zones at the crack tips. Following the approach of Dugdale/Barenblatt, closing stresses are applied to the crack faces in the softening zone. The stresses are described by a power function. Relations are worked out between the remote stress on a cracked plate, the tensile strength of the material and the size of the softening zone. The finite width of a plate is considered and so are various stress distributions of the softening zone. Experiments were performed to estabilish the stress-strain behaviour of concrete in deformation-controlled uniaxial tensile loading. Furthermore, it was investigated whether cyclic loading affects the static envelope curve. A qualitative model is presented which illustrates the effect of prepeak cyclic loading on deformation and stress distribution in a specimen. The results show that nonlinear fracture mechanics can be applied to concrete. The loadbearing capacity of a cracked plate can be predicted with reasonable accuracy. As appears from the experiments, the application of this approach to cyclic loading is very promising.read more
Citations
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Journal ArticleDOI
Plastic-Damage Model for Cyclic Loading of Concrete Structures
Jeeho Lee,Gregory L. Fenves +1 more
TL;DR: In this paper, a new plastic-damage model for concrete subjected to cyclic loading is developed using the concepts of fracture-energy-based damage and stiffness degradation in continuum damage mechanics.
Strain-softening of concrete under multiaxial loading conditions
TL;DR: A submitted manuscript is the author's version of the article upon submission and before peer-review as mentioned in this paper, and the final published version features the final layout of the paper including the volume, issue and page numbers.
Experimental determination of crack softening characteristics of normalweight and lightweight concrete
TL;DR: In this paper, the authors compared the fracture behavior of normal weight and lightweight concrete with respect to their envelope curves, material stiffness and degradation during post-peak cycles, and residual compressive deformation on crack closure.
Pacific earthquake engineering research center
Matías A. Hube,Khalid M. Mosalam +1 more
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References
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Journal Article
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Journal ArticleDOI
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