Mesoscale numerical study of aggregate size in concrete by discrete element method

Zhu, Rong

doi:10.21012/fc10.235426

Cited by 2 publications

(7 citation statements)

References 13 publications

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“…When comparing the results reported in the literature (see Refs. [3][4][5][6][7][8][9][10][11]), a general trend can be observed whereby a decrease in member size results in higher load capacity. The influence of the size effect on crack resistance was the subject of interest for several researchers, for example, Bažant and Pfeiffer [3], Hillerborg, Modeer and Petersson [9], Zhu [10], Chandram and Galyon [11].…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5][6][7][8][9][10][11]), a general trend can be observed whereby a decrease in member size results in higher load capacity. The influence of the size effect on crack resistance was the subject of interest for several researchers, for example, Bažant and Pfeiffer [3], Hillerborg, Modeer and Petersson [9], Zhu [10], Chandram and Galyon [11]. It appears that size effect is the main factor influencing the crack resistance of concrete structures.…”

Section: Introductionmentioning

confidence: 99%

“…It is higher than the axial tensile concrete strength f ctm and, as stated in Refs. [3][4][5][6][7][8][9][10][11], the difference can be significant depending on many factors, primarily on the cross-section height of the member. The influence of member's dimensions on the so-called flexural tensile concrete strength f ct,f was analyzed by Hillerborg, Modeer and Peterson [9].…”

Section: Introductionmentioning

confidence: 99%

“…example, Bažant and Pfeiffer [3], Hillerborg, Modeer and Petersson [9], Zhu [10], Chandram and Galyon [11]. It appears that size effect is the main factor influencing the crack resistance of concrete structures.…”

Section: Introductionmentioning

confidence: 99%

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Crack Resistance of Lightly Reinforced Concrete Structures

Słowik,

Błazik-Borowa,

Sulewska

et al. 2024

Materials

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The crack resistance of concrete structures with low reinforcement ratios requires a broader examination. It is particularly important in the case of foundations working in changing subsoil conditions. Unfavorable phenomena occurring in the subsoil (e.g., ground subsidence, landslips, non-uniform settlement) can lead to unexpected cracking. Therefore, it is necessary to check the effectiveness of the low reinforcement provided. As there are limited studies on lightly reinforced concrete structures, we performed our own experimental investigation and numerical calculations. In the beams analyzed, the reinforcement ratio varied from 0.05% to 0.20%. It was found that crack resistance in concrete members depends on the reinforcement ratio and steel bar distribution. A comprehensive method was proposed for estimating the crack resistance of lightly reinforced concrete members in which both the reinforcement ratio and the reinforcement dispersion ratio were taken into account. Furthermore, the method considered the size effect and the fracture properties of concrete. The proposed method provides the basis for extrapolation of the test results obtained for small elements and conclusions for members with large cross-sections, such as foundations, which frequently use lightly reinforced concrete.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Crack Resistance of Lightly Reinforced Concrete Structures

Słowik,

Błazik-Borowa,

Sulewska

et al. 2024

Materials

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“…In general, smaller specimens exhibits greater stress at failure than larger ones. Some findings reported in the literature suggest that size effect exists also when testing other properties of concrete like tensile strength [ 13 , 14 , 15 , 16 ] and fracture energy [ 17 , 18 ]. Unfortunately, this problem is much less recognized and described, probably because test results of tensile strength and fracture energy are characterized by higher deviation than the results of compressive strength.…”

Section: Introductionmentioning

confidence: 99%

Length Effect at Testing Splitting Tensile Strength of Concrete

Słowik

Akram

2021

Materials

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Tensile strength of concrete is the basic property when estimating the cracking resistance of the structure and when analysing fracture processes in concrete. The most common way of testing tensile strength is the Brazilian method. It has been noticed that the shape and size of specimens influence the tensile splitting strength. The experiments were performed to investigate the impact of cylinder’s length on tensile concrete strength received in the Brazilian method. During the experiment the tensile concrete strength was tested on two different sizes cylindrical specimens: 150 mm × 150 mm and 150 mm × 300 mm. Experiments were performed in two stages, with two types of maximum aggregate size: 16 mm and 22 mm. The software “Statistica” was used to perform the broad scale statistical analysis. When comparing test results for shorter and longer specimens, the increase of tensile splitting strength tested on shorter cylinders was observed (approximately 5%). However, when performing deeper statistical analysis, it has been found that the length effect was not sensitive to the strength of the cement matrix and the type of aggregate but was influenced by the aggregate size. Further experiments are needed in order to perform a multi-parameter statistical analysis of scale effect when testing the splitting tensile strength of concrete.

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Mesoscale numerical study of aggregate size in concrete by discrete element method

Cited by 2 publications

References 13 publications

Crack Resistance of Lightly Reinforced Concrete Structures

Crack Resistance of Lightly Reinforced Concrete Structures

Length Effect at Testing Splitting Tensile Strength of Concrete

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