An efficient computational framework for generating realistic 3D mesoscale concrete models using micro X-ray computed tomography images and dynamic physics engine

Huang, Yujie; Guo, Fanghong; Zhang, Hui; Yang, Zhenjun

doi:10.1016/j.cemconcomp.2021.104347

Cited by 36 publications

(5 citation statements)

References 59 publications

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“…Such a situation would require deeper consideration of the model and its possible modification. One of the possible directions for improving the results is the development of a mesoscopic model based on realistic aggregate models for which it is possible to define their specific orientation [46].…”

Section: Discussionmentioning

confidence: 99%

Mesoscale Modeling of Polymer Concrete Dynamic Properties

Dunaj

2023

Polymers

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There is a constant need to predict the dynamic properties of composite materials already at the design stage. A particularly attractive tool for achieving this goal is mesoscale finite element modeling. This paper presents the mesoscale modeling of the dynamic properties of polymer concrete. The method is based on finite element modeling and substructural identification. Substructural identification is a model updating technique based on frequency response functions. It enables the identification of model dynamic properties considering damping. The presented method is used to model the dynamic properties of a polymer concrete beam. In the first step, the mesoscale finite element model is built and then it is decoupled into substructures: a polymer matrix, aggregates, and an interfacial transition zone (ITZ). Next, the dynamic properties of the polymer matrix substructure are updated, and the model is reassembled. Then, second-stage updating takes place, which consists of determining the parameters of the aggregates and the ITZ. The use of substructural identification made it possible to determine the parameters of substructures that do not exist in an independent, isolated form like the ITZ. Moreover, it allows for determining the amount of damping that ITZ brings to the structure.

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Section: Discussionmentioning

confidence: 99%

Mesoscale Modeling of Polymer Concrete Dynamic Properties

Dunaj

2023

Polymers

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“…Further analysis of the obtained data using machine-learning methods will make it possible to establish the dependence of the rate of the corrosion process on temperature, humidity and radiation exposure [4,21,27,39,60]. In addition, it will allow developing methods for assessing the service life and condition of concrete in reinforced concrete structures of deep-burial storage facilities for a long service life under the influence of temperature, humidity and radiation.…”

Section: Future Directionsmentioning

confidence: 99%

“…Existing methods for concrete carbonation process research at various stages of the building structure's life cycle make it possible to carry out model tests of concrete in the shortest possible time by simulating the main operational factors influencing the development of corrosion processes [28,34,[37][38][39]. However, specific impacts characteristic of the operation of structures of deep-burial storage facilities (in particular, elevated temperatures and radiation exposure) are rarely taken into account in such research [4,7,8].…”

Section: Introductionmentioning

confidence: 99%

Concrete Carbonation of Deep Burial Storage Constructions under Model Aging Conditions

Medvedev,

Pustovgar,

Adamtsevich

et al. 2023

Buildings

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To ensure the safe operation of concrete structures of deep-burial storages, it is necessary to research the degradation mechanisms of such structures. Concrete carbonation is one of the key factors determining the service life of concrete structures. Existing methods for the concrete carbonation process research at various stages of the building structure life cycle make it possible to conduct model tests in the shortest possible time by simulating the operational factors influencing the corrosion process development. The authors carried out model tests of concrete of deep-burial storages using the method of accelerated concrete carbonation and by taking into account the effects of elevated temperatures. When exposed to elevated temperatures during carbonation, concrete samples exhibit a decrease in compressive strength in the first 56 days of testing by an average of 1.6 MPa. However, by the end of the tests (168 days), the strength of concrete samples at elevated temperatures is on average 4 MPa higher. The microstructure and carbonation dynamics were studied by XRD, TGA and SEM. The data obtained in the research can be used to develop models for predicting the service life of concrete structures of deep-burial storages.

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“…Past studies show that GPC can be produced using fly ash [58], metakaolin [59], silica fume [60], ground granulated blast furnace slag [61], and rice husk ash [62], among which fly ash is the most used waste material to produce GPC due to its superior engineering and durability properties [63]. Furthermore, it is pertinent to mention that both types of concrete are heterogeneous and their physical properties at meso-scale may also impact the behavior that can be studied utilizing micro X-ray computed tomography images [64].…”

Section: Introductionmentioning

confidence: 99%

Structural Performance of Energy Efficient Geopolymer Concrete Confined Masonry: An Approach towards Decarbonization

et al. 2023

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Geopolymer concrete is preferred over OPC due to its use of energy waste such as fly ash, making it more sustainable and energy-efficient. However, limited research has been done on its seismic characterization in confined masonry, highlighting a gap in sustainable earthquake-resistant structures. Our study compares the performance of alkali-activated fly-ash-based geopolymer concrete bare frame and confined masonry wall panels with conventional concrete. Experimental results showed that geopolymer concrete bare frame has 3.5% higher initial stiffness and 1.0% higher lateral load-bearing capacity compared to conventional concrete. Geopolymer concrete confined masonry exhibited 45.2% higher initial stiffness and 4.1% higher ultimate seismic capacity than traditional concrete. The experimental results were verified using a numerical simulation technique with ANSYS-APDL, showing good correlation. Comparison with previously tested masonry walls revealed that GPC confined masonry has similar structural behavior to cement concrete masonry. This study demonstrates that geopolymer concrete made from waste energy such as fly ash is a sustainable and low-energy substitute for OPC concrete, particularly in highly seismic-prone areas, for a cleaner environment.

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An efficient computational framework for generating realistic 3D mesoscale concrete models using micro X-ray computed tomography images and dynamic physics engine

Cited by 36 publications

References 59 publications

Mesoscale Modeling of Polymer Concrete Dynamic Properties

Mesoscale Modeling of Polymer Concrete Dynamic Properties

Concrete Carbonation of Deep Burial Storage Constructions under Model Aging Conditions

Structural Performance of Energy Efficient Geopolymer Concrete Confined Masonry: An Approach towards Decarbonization

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