Simulating the behaviour of fresh concrete with the Distinct Element Method – Deriving model parameters related to the yield stress

Mechtcherine, Viktor; Shyshko, Sergiy

doi:10.1016/j.cemconcomp.2014.08.004

Cited by 68 publications

(26 citation statements)

References 22 publications

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“…The commercially available DEM code PFC 3D is used for the study. PFC 3D has been previously used to model the effect of missile impact on concrete, for modelling the uniaxial compression test in concrete specimens, as well as self‐compacting concrete and slump in fresh concrete . The 2D version of the code has been used to study size effect under uniaxial compression and in the Brazilian split cylinder test.…”

Section: Modelling the Meso‐structurementioning

confidence: 99%

“…PFC 3D has been previously used to model the effect of missile impact on concrete, 24 for modelling the uniaxial compression test in concrete specimens, 25 as well as self-compacting concrete 26 and slump in fresh concrete. 27 The 2D version of the code has been used to study 28 size effect under uniaxial compression and in the Brazilian split cylinder test. For the present simulations, additional user subroutines had to be written and linked to the main PFC3D code in order to implement capabilities not inbuilt to PFC3D, as will be discussed in Section 5.4.…”

Section: Modelling the Meso-structurementioning

confidence: 99%

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Effect of meso‐structure on strength and size effect in concrete under tension

Murali

Deb

2017

Num Anal Meth Geomechanics

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SummaryThe effect of heterogeneity in meso level geometric and material properties on tensile strength and size effect in split cylinder specimens is investigated. Critical meso geometric parameters are identified by studying their influence on the evolution of the fracture process zone. A statistical analysis is used to account for dependencies between the parameters. A reversal of the size effect, important for the strength of field specimens, is observed for certain meso geometries. Meso level explanations for this are proposed, and meso geometries likely to show such a reversal are identified. For moderately sized specimens, major trends in the size effect are seen to be almost entirely explained by heterogeneity in the meso geometry. KEYWORDS concrete, discrete element method, meso-structure, size effect

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Section: Modelling the Meso‐structurementioning

confidence: 99%

Section: Modelling the Meso-structurementioning

confidence: 99%

Effect of meso‐structure on strength and size effect in concrete under tension

Murali

Deb

2017

Num Anal Meth Geomechanics

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“…In addition, material responses of the 3D simulation become more ductile compared with the results of 2D simulation and the stress fluctuations are relatively smaller due to a higher coordination number (Nitka and Tejchman 2015). Recently, 3D asphalt concrete simulation systems based on the Burger's model (Chen et al 2011;Liu et al 2012) and 3D fresh concrete simulation systems based on the Bingham model (Shyshko and Mechtcherine 2013;Remond and Pizette 2014;Mechtcherine and Shyshko 2015) or the linear-spring dashpot model (Tan et al 2015) have been gradually built up. But due to the lack of relatively appropriate constitutive models, the 3D simulation achievements for ordinary concrete are still very few.…”

Section: Introductionmentioning

confidence: 99%

Simulating Tensile and Compressive Failure Process of Concrete with a User-defined Bonded-Particle Model

Ren

Tian

2018

Int J Concr Struct Mater

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A user-defined bonded-particle model (UBM) which is based on the modified parallel bond was established in this paper to investigate the tensile and compressive failure mechanism of concrete on the three-dimensional (3D) level. The contact constitutive relation and the failure criterion of the UBM can be added to the commercial discrete element software PFC 3D by compiling them as a dynamic link library file and loading it into PFC 3D whenever needed. In addition, the aggregate particles can be generated according to the volume fraction and the shape of each aggregate is irregular. Then, by comparing the results of numerical simulation with the results of laboratory tests, it is found that this bonded-particle model can simulate the tensile and compressive failure process of concrete well to a certain extent. Specifically, the two have basically similar failure patterns and stress-strain responses no matter under tension or compression loading condition. All results indicate that this UBM is a promising tool in understanding and predicting the tensile and compressive failure process of concrete. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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“…The same calculations for the velocity gradients can be used to determine the orientation of the fibres during the pouring of fresh concrete into a trench. Mechtcherine and Shyshko (2015) described a numerical approach based on the distinct-element method as a means of simulating the fresh concrete during its different working processes. Ponikiewski et al (2015) investigated the correlation between the location of concrete casting points and the fibre spacing in a hardened SFRSCC element.…”

Section: Notationmentioning

confidence: 99%

Numerical simulation of the distribution and orientation of steel fibres in the SCC

Bao

et al. 2017

Magazine of Concrete Research

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Currently, steel-fibre-reinforced self-compacting concrete (SFRSCC) is widely used in infrastructure construction. The distribution and orientation of the fibres could directly determine the mechanical properties and behaviours of the SFRSCC component. This paper presents a new numerical simulation that can be used to calculate the distribution and orientation of the fibres in the SCC during the casting procedure. The casting procedure of the SFRSCC is investigated by using the computational fluid dynamics software CFX, based on the finite-volume method. The motion of the fibres can be simplified into translation and rotation, and the Matlab program simulates the procedure. To verify the method's accuracy, a casting procedure for a SFRSCC beam was simulated and the fibres' density in three orthogonal planes was investigated. The calculation results show good agreement with the experimental results, and the method is effective in analysing the distribution and orientation of fibres in SCC. To further analyse the orientation of fibres, the angles between three axes and fibre projection in three different planes are discussed. The beam can be divided into six parts according to the variation of the angle between the X axis and the projection of fibres in the XY plane.

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Simulating the behaviour of fresh concrete with the Distinct Element Method – Deriving model parameters related to the yield stress

Cited by 68 publications

References 22 publications

Effect of meso‐structure on strength and size effect in concrete under tension

Effect of meso‐structure on strength and size effect in concrete under tension

Simulating Tensile and Compressive Failure Process of Concrete with a User-defined Bonded-Particle Model

Numerical simulation of the distribution and orientation of steel fibres in the SCC

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