Improved Random Aggregate Model for Numerical Simulations of Concrete Engineering Simulations of Concrete Engineering

Qin, Yuan; Jaturapitakkul, Chai; Dang, Faning

doi:10.3846/13923730.2012.760481

Cited by 12 publications

(2 citation statements)

References 19 publications

(23 reference statements)

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“…A number of traditional viewpoints (Tian et al 2009;Qin et al 2013) hold that the damage process of concrete specimens can be divided into three stages: the elastic stage, crack development stage, and complete damage stage. However, Figure 6 shows that these traditional viewpoints may not entirely be accurate.…”

Section: Resultsmentioning

confidence: 99%

A Quasi Real-Time Approach to Investigating the Damage and Fracture Process in Plain Concrete by X-Ray Tomography

Qin

Jaturapitakkul

Wang

et al. 2015

Journal of Civil Engineering and Management

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In most concrete-related computer tomography (CT) experiments, detailed information on the damage and fracture process is obtained using nonreal-time approaches, with the CT method constantly regarded as a qualitative method. This study develops a quasi real-time method with the use of experimental instruments. The average CT number is used to analyse the damage and fracture process in concrete specimens and the theory that underlies concrete damage and fracture is improved. Various characteristics of the fracture form in different loading cases are investigated at the macro and micro levels. This study provides a convenient and fast method for qualitatively and quantitatively analysing concrete. qin yuAn. PhD, the Institute of Water Resources and Hydro-electric Engineering of Xi'an University (China). His research interests: the mechanical property of concrete and concrete technology. chai Junrui. Professor at the Institute of Water Resources and Hydro-electric Engineering of Xi'an University of Technology (China) and College of Civil and Hydropower Engineering of China Three Gorges University (China). His research interests: the mechanical property of concrete and non-linear seepage problem for dam engineering. ding WeihuA. Associate Professor at the Civil Engineering and Architecture of Xi'an University of Technology (China). His research interests: the CT experiment of concrete material and the problems of engineering geological. dang fAning. Professor at the Civil Engineering and Architecture of Xi'an University of Technology (China). His research interests: the mechanical property of concrete and seepage problem for dam engineering. lei mAn. Master in the Civil Engineering and Architecture of Xi'an University of Technology (China). Her research interests include the CT experiment of concrete material and meso-damage process for concrete material. Xu ZengguAng. Lecturer of the Institute of Water Resources and Hydro-electric Engineering of Xi'an University (China). His research interests: the environmental and non-linear seepage problem for civil engineering.

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Section: Resultsmentioning

confidence: 99%

A Quasi Real-Time Approach to Investigating the Damage and Fracture Process in Plain Concrete by X-Ray Tomography

Qin

Jaturapitakkul

Wang

et al. 2015

Journal of Civil Engineering and Management

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“…Over the past several decades, computer performance has improved significantly, so that it became reality to simulate fracture behaviors of heterogeneous concrete at the mesoscale level. 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.…”

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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Visualization and Transparentization of the Structure and Stress Field of Aggregated Geomaterials Through 3D Printing and Photoelastic Techniques

Xie³

et al. 2017

Rock Mech Rock Eng

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Improved Random Aggregate Model for Numerical Simulations of Concrete Engineering Simulations of Concrete Engineering

Cited by 12 publications

References 19 publications

A Quasi Real-Time Approach to Investigating the Damage and Fracture Process in Plain Concrete by X-Ray Tomography

A Quasi Real-Time Approach to Investigating the Damage and Fracture Process in Plain Concrete by X-Ray Tomography

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

Visualization and Transparentization of the Structure and Stress Field of Aggregated Geomaterials Through 3D Printing and Photoelastic Techniques

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