Plasticity models for the biaxial behaviour of concrete at elevated temperatures, Part I: Failure criterion

Khennane, Amar; Baker, G. P.

doi:10.1016/0045-7825(92)90183-k

Cited by 16 publications

(2 citation statements)

References 13 publications

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“…Several researchers have studied the biaxial compressive strength of both normal strength (NSC) and high strength concretes (HSC) and found that it depends on concrete composition, on temperature, and on strain rate . The ratio of concrete biaxial compressive strength to its uniaxial compressive strength when the lateral stress is equal to the vertical one, denoted hereafter, λ b 1 , is found to vary between 1.15 and 1.35 as reported by Guo .…”

Section: Introductionmentioning

confidence: 83%

Numerical study of the biaxial compressive strength of high strength concrete based on a yield design micromechanical approach

Naija

Hassen

Limam

et al. 2020

Num Anal Meth Geomechanics

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Summary This paper presents a numerical study of high strength concrete microstructure effects on its uniaxial and biaxial compressive strengths. Concrete is first represented as a set of angular aggregates interacting within a cement paste matrix. Then, a yield design kinematic approach is conducted at the mesoscopic scale in order to determine the concrete compressive strength for a given loading path. The proposed model, having a low computational cost, is able to capture the main microstructure effects already observed in literature on concrete uniaxial compressive strength, in particular, the aggregates volume fraction and maximal size effects. Finally, the proposed model also predicts the biaxial failure envelope of high strength concrete and confirms some experimental trends observed in literature.

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Section: Introductionmentioning

confidence: 83%

Numerical study of the biaxial compressive strength of high strength concrete based on a yield design micromechanical approach

Naija

Hassen

Limam

et al. 2020

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

“…With regard to previous computational modelling in thermomechanics, there have been a number of works investigating thermo-plasticity for concrete at elevated temperatures, e.g. de Borst & Peeters (1989), Khennane & Baker (1992a-c, 1993) and more recently, Heinfling et al (1997Heinfling et al ( , 1998. Schrefler et al (1997), Ulm et al (1998) and Consolazio & Chung (2004) have appropriately coupled considerations of vapour diffusion and/or chemical degradation, but without necessarily the strong thermomechanical interaction at high stress and temperature.…”

Section: Introductionmentioning

confidence: 99%

An anisotropic thermomechanical damage model for concrete at transient elevated temperatures

Baker

Borst

2005

Phil. Trans. R. Soc. A.

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The behaviour of concrete at elevated temperatures is important for an assessment of integrity (strength and durability) of structures exposed to a high-temperature environment, in applications such as fire exposure, smelting plants and nuclear installations. In modelling terms, a coupled thermomechanical analysis represents a generalization of the computational mechanics of fracture and damage. Here, we develop a fully coupled anisotropic thermomechanical damage model for concrete under high stress and transient temperature, with emphasis on the adherence of the model to the laws of thermodynamics. Specific analytical results are given, deduced from thermodynamics, of a novel interpretation on specific heat, evolution of entropy and the identification of the complete anisotropic, thermomechanical damage surface. The model is also shown to be stable in a computational sense, and to satisfy the laws of thermodynamics.

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Influence of damage evolution on the failure surface of concrete

Luo

Wei

2006

Wuhan Univ. J. Nat. Sci.

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Plasticity models for the biaxial behaviour of concrete at elevated temperatures, Part I: Failure criterion

Cited by 16 publications

References 13 publications

Numerical study of the biaxial compressive strength of high strength concrete based on a yield design micromechanical approach

Numerical study of the biaxial compressive strength of high strength concrete based on a yield design micromechanical approach

An anisotropic thermomechanical damage model for concrete at transient elevated temperatures

Influence of damage evolution on the failure surface of concrete

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