Computational technology for analysis of 3D meso-structure effects on damage and failure of concrete

Wang, Xiaofeng; Zhang, Mingzhong; Jivkov, Andrey P.

doi:10.1016/j.ijsolstr.2015.11.018

Cited by 198 publications

(124 citation statements)

References 36 publications

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“…To this end, the well-known Walraven's conversion equation used by several researchers is employed in the present work [32]. e existing studies indicate that the shape of coarse aggregate a ects the mechanical behaviors of concrete, especially the mesoscale fracture mechanism [24]. Regarding HFGC, there are mainly two types of coarse aggregates: the gravel stone and the crushed stone.…”

Section: Mesostructure Generation Of Hfgc and Wet-screened Concretementioning

confidence: 99%

“…On the contrary, since the mechanical behaviors of concrete on the structural scale (macroscale) are greatly controlled by its components and their interactions taking place on a ner scale (mesoscale) [22,23], several mesoscale models have been developed to provide tools for a better understanding of the extremely complicated mechanical behaviors of concrete, especially fracturing [24]. Roughly, there are two types of mesoscale models, namely, the continuum model [25][26][27][28] and the lattice model [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Comparisons of Tensile Fracturing Behaviors of Hydraulic Fully Graded and Wet‐Screened Concretes: A Mesoscale Study

Jin

Jing

et al. 2018

Advances in Materials Science and Engineering

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e widely used wet-screening method in the experimental testing of hydraulic fully graded concrete inevitably results in a gap between the real mechanical parameters of hydraulic fully graded concrete specimens and those of the corresponding wet-screened specimens and therefore necessitates the comparative study on their mechanical behaviors. To this end, a two-dimensional mesoscale modeling methodology is developed for simulating the tensile fracturing behaviors of hydraulic fully graded and wet-screened concretes, and extensive Monte Carlo simulations are performed. e individual effects of specimen size variation, variation of gradation and volume fraction of coarse aggregates, and the weaker interfacial transition zones surrounding the large coarse aggregates to be removed by wetscreening are detailed followed by the discussion on the combined effect of these three main factors. All the mean values of the macroscopic mechanical parameters related to tensile fracturing behaviors are found to show significant change in response to wetscreening, and the underlying differentiation mechanism and governing factor(s) are identified. Furthermore, it is shown that the randomness of the investigated parameters can be roughly described by the Gaussian distribution, and the dispersion of each of the investigated parameters of hydraulic fully graded concrete is higher than that of the corresponding wet-screened concrete.

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Section: Mesostructure Generation Of Hfgc and Wet-screened Concretementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparisons of Tensile Fracturing Behaviors of Hydraulic Fully Graded and Wet‐Screened Concretes: A Mesoscale Study

Jin

Jing

et al. 2018

Advances in Materials Science and Engineering

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“…In this stage, dissipation of energy in the form of plastic behavior and/or surface separation during micro cracking Wang [5]. As the energy is dissipated occurred concrete is no longer in the elastic range and cannot be considered as homogenous continuum, and its behavior will be governed by the sub-material of the composite concrete and a new scale of analysis is required to overcome this problem.…”

Section: Introductionmentioning

confidence: 99%

“…The direct method gives more flexibility in the analysis of a meso structures. It takes into account the major parameters of the multi phases material such as shape, size, gradation and distribution of the aggregate particles, interface between aggregate particles and cement mortar, and their effect on the mechanical behavior of the concrete Wang [5]. On the other hand, the indirect method dose not comprise the modeling of concrete multi phases explicitly.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Concrete Beam under Flexural Stresses Using Meso-Scale Model

Al-Zuhairi

Taj

2018

CivileJournal

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Two dimensional meso-scale concrete modeling was used in finite element analysis of plain concrete beam subjected to bending. The plane stress 4-noded quadrilateral elements were utilized to model coarse aggregate, cement mortar. The effect of aggregate fraction distribution, and pores percent of the total area -resulting from air voids entrapped in concrete during placement on the behavior of plain concrete beam in flexural was detected. Aggregate size fractions were randomly distributed across the profile area of the beam. Extended Finite Element Method (XFEM) was employed to treat the discontinuities problems result from double phases of concrete and cracking that faced during the finite element analysis of concrete beam. Cracking was initiated at a small notch located at the middle of the bottom face of the concrete beam. The response of plain concrete beam subjected to pure bending via two point load application was detected using (XFEM) analysis of meso-scale concrete model. Assuming full bond between aggregate particles, and mortar at interfacial zone, the flexural strength of plain concrete beam is increased when aggregate particles size is increased, so that bending and shear stress were affected by void percentage and aggregate particles distribution. The maximum deflection at midspan was increased when the aggregate particles size decreases.

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“…Many numerical methods, such as the digital image processing (DIP) method (Barbosa et al 2011;Başyiğit et al 2012) and the parameterization modeling (PM) method (Qin et al 2013;Xu, Chen 2016;Yin et al 2015;Zhang et al 2016), were developed for modeling heterogeneous concrete with aggregates and mortar matrix. Recently, air voids were also contained in some numerical models created with the DIP (Huang et al 2016) and PM (Ren, Sun 2017;Wang et al 2015Wang et al , 2016 methods to assess the effects of the characteristic parameters of air voids on the fracture properties of concrete. A cohesive crack model with a bilinear constitutive law, quadratic nominal stress cracking criterion, and linear damage evolution criterion was introduced to simulate the fracture processes (Yang et al 2009;Yin et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Air-Void-Affected Zone in Concrete Beam Under Four-Point Bending Fracture

Zhang

Yang

Gao

2018

Journal of Civil Engineering and Management

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Abstract.A series of numerical simulations were performed on prenotched four-point bending (FPB) concrete beams containing air voids of different sizes and locations by using the finite element method combined with the cohesive crack model. The void-affected zone was proposed for characterizing the effect of a void on a fracture, and its size was determined by moving an air void horizontally until the crack path changed. As a function of air void location and size, the dimensionless affected-zone radius was fitted according to the numerical results. Finally, the fracture processes of the prenotched FPB concrete beams with randomly distributed voids were simulated numerically, and the affected-zone radius was used to explain the choice of crack paths to verify the prediction. It was found that the prediction is accurate for an isolated affected zone and is roughly approximate for an overlapped one.

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Computational technology for analysis of 3D meso-structure effects on damage and failure of concrete

Cited by 198 publications

References 36 publications

Comparisons of Tensile Fracturing Behaviors of Hydraulic Fully Graded and Wet‐Screened Concretes: A Mesoscale Study

Comparisons of Tensile Fracturing Behaviors of Hydraulic Fully Graded and Wet‐Screened Concretes: A Mesoscale Study

Finite Element Analysis of Concrete Beam under Flexural Stresses Using Meso-Scale Model

Air-Void-Affected Zone in Concrete Beam Under Four-Point Bending Fracture

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