Steel Fibre Reinforced Concrete Meso‐Scale Numerical Analysis

Li, Zhengwei; Wu, Meizhong; Wu, Jiawei; Cui, Yu-Jun; Xue, Xingwei

doi:10.1155/2020/2084646

Cited by 6 publications

(4 citation statements)

References 46 publications

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“…A procedure written in GNU OCTAVE and LISP, similar to the method described in the publication [ 43 ], was used for random fiber generation. The number of fibers was determined based on the fiber content in the amount of

in a volume of 500 × 200 × 50 mm.…”

Section: Materials and Methodsmentioning

confidence: 99%

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Computational Fracture Evolution Analysis of Steel-Fiber-Reinforced Concrete Using Concrete Continuous Damage and Fiber Progressive Models

et al. 2023

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The process of concrete cracking is a common problem because the first micro-cracks due to the loss of moisture may appear even before the concrete is loaded. The application of fracture mechanics allows for a better understanding of this problem. Steel-fiber-reinforced concrete (SFRC) samples with a notch were subjected to a three-point bending test, and the results for crack energy were used to analyze the concrete’s material properties. In this paper, an experimental and numerical analysis of SFRC with rapid changes in the force (F) crack mouth opening displacement (CMOD) curve (F-CMOD) is presented. In order to obtain the relevant F-CMOD diagrams, three-point bending tests were carried out with non-standard samples with a thickness equal to one-third of the width of standard samples. For analysis purposes, crimped steel fibers were adopted. A probabilistic analysis of the most important parameters describing the material in question, such as peak strength, post-cracking strength, crack mouth opening displacement (CMOD), fracture energy, and the post-cracking deformation modulus, was conducted. The tests and the analysis of their results show that the quasi-static numerical method can be applied to obtain suitable results. However, significant dynamic effects during experiments that influence the F-CMOD curves are hard to reflect well in numerical calculations.

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in a volume of 500 × 200 × 50 mm.…”

Section: Materials and Methodsmentioning

confidence: 99%

“…The parabolic total strain crack model [ 42 , 43 ] represents another group of continuous mechanics approaches based on a fuzzy attempt to fracture energy. It is used in the analysis of concrete structures, assuming concrete as a non-linear, isotropic, homogeneous material.…”

Section: Introductionmentioning

confidence: 99%

Computational Fracture Evolution Analysis of Steel-Fiber-Reinforced Concrete Using Concrete Continuous Damage and Fiber Progressive Models

et al. 2023

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“…Extensive research has been conducted on the effect of steel fiber on concrete performance owing to the good performance of SFRC. It has been demonstrated that integrating steel fiber into concrete can improve compressive strength, the elastic modulus, and flexural strength [9][10][11][12]. Abbass et al [13] investigated the effect of steel fibers with different lengths and diameters on the mechanical properties of concrete.…”

Section: Introductionmentioning

confidence: 99%

“…The majority of existing research focused on the influence of different lengths, aspects, and shapes of steel fibers on the mechanical properties of concrete (e.g., [9][10][11][12][13][14][15][16][17][18]), the appropriate content of steel fiber (e.g., [19]), and the ratio of steel fiber length and aggregate size (e.g., [21][22][23]). Meanwhile, studies on the application of SFRC in tunnel linings have mainly focused on the structural form and design method of SFRC single-layer linings (e.g., [24][25][26]), as well as the effect of SFRC on the bearing capacity and toughness of the lining (e.g., [27][28][29][30][31][32][33]).…”

Section: Introductionmentioning

confidence: 99%

Cracking Pattern and Bearing Capacity of Steel Fiber-Reinforced Concrete Single-Layer Tunnel Lining

Zhou

et al. 2023

Sustainability

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In recent years, steel fiber-reinforced concrete (SFRC) single-layer linings have been used in tunnel engineering. Compared to plain concrete single-layer linings, SFRC single-layer linings demonstrate enhanced bearing capacity, durability, and sustainability. Existing studies primarily focused on the mechanical properties of SFRC; however, limited investigations have been conducted on the cracking pattern of SFRC linings. This study uses laboratory tests to examine the influence of steel fiber content and aspect ratio on the mechanical properties of concrete, such as compressive strength and elastic modulus. After the recommended content and aspect ratio of steel fiber are proposed through tests, the cracking pattern and safety performance of plain concrete and SFRC linings under surrounding rock pressure are studied using a similar model test. The test results indicate that the recommended steel fiber volume fraction and aspect ratio for CF35 SFRC are 0.58% and 70, respectively. Due to the effect of loose load, cracks initially develop on the inside of arch crowns in both plain concrete and SFRC single-layer linings. Subsequently, new cracks appear on the inside of the lining floor and the outside of the two wall feet. Numerous narrow cracks with rugged and winding expansion paths can be found on SFRC single-layer linings. Conversely, plain concrete single-layer linings exhibit fewer cracks with larger widths along a straighter path. The initial cracking load of a single-layer lining made of plain concrete is 0.027 MPa, whereas for a single-layer lining made of SFRC, it is 0.04 MPa. This indicates that SFRC can effectively enhance the initial cracking load of lining structures. In the event of damage to the lining, the most critical area for the plain concrete single-layer lining is at the two wall feet, where the minimum safety factor is 1.66. However, for the SFRC lining in the same location, the safety factor is 2.7, resulting in a 62.7% increase in safety.

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Mechanical behavior of steel fiber reinforced concrete at cryogenic temperatures: Characterization with 3D meso-scale modelling

Jin,

Jia,

Zhang

et al. 2024

Cold Regions Science and Technology

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Steel Fibre Reinforced Concrete Meso‐Scale Numerical Analysis

Cited by 6 publications

References 46 publications

Computational Fracture Evolution Analysis of Steel-Fiber-Reinforced Concrete Using Concrete Continuous Damage and Fiber Progressive Models

Computational Fracture Evolution Analysis of Steel-Fiber-Reinforced Concrete Using Concrete Continuous Damage and Fiber Progressive Models

Cracking Pattern and Bearing Capacity of Steel Fiber-Reinforced Concrete Single-Layer Tunnel Lining

Mechanical behavior of steel fiber reinforced concrete at cryogenic temperatures: Characterization with 3D meso-scale modelling

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