Model Test on Bearing Characteristics of Basalt Fiber‐Reinforced Concrete Lining

Wang, Dao‐yuan; Qi, Jia-suo; Cui, Guangyao; Yang, Yijie; Chang, Jie

doi:10.1155/2020/3891343

Cited by 7 publications

(6 citation statements)

References 20 publications

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“…At present, some scholars have studied the anti-fault measures, which mainly propose two ways of anti-seismic joints and flexible joints, to study the anti-fault measures in tunnels. Current scholars on the application of fiber concrete in tunnel lining have been part of the study, such as Wang [8], etc. Through the reinforced concrete and basalt fiber concrete lining indoor mechanical properties model test, the study of basalt fiber concrete lining bearing characteristics found that basalt fibers help to improve the lining of the initial bearing performance, compared with reinforced concrete, which is more conducive to controlling the deformation of the tunnel of the weak surrounding rock.…”

Section: Introductionmentioning

confidence: 99%

Study on the Fracture Resistance of Mixed Fiber Concrete Lining in a Reverse Fault Tunnel

Wang,

Huang,

Wang

et al. 2023

Applied Sciences

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With the increasing complexity of engineering environments in tunnel construction, some projects are located in areas with adverse geological conditions, including areas prone to fault movements and other geological hazards. Fiber-reinforced concrete can significantly enhance structural performance in such challenging conditions. Currently, the application of high-performance steel-polypropylene fiber in tunnel linings and its anti-fault performance are quite limited. Therefore, this paper focuses on studying the application of steel-polypropylene mixed fiber-reinforced concrete in tunnel lining under reverse fault movements. In this paper, the constitutive relationship of mixed fiber-reinforced concrete is modified based on literature data. Utilizing the Najar formula, fiber-related variables were designed, and a three-dimensional numerical simulation model of a reverse fault tunnel was established. By designing various parameter combination cases, the structural response of tunnel linings was calculated and studied. then the influence patterns of mixed fiber parameters on the anti-fault performance of tunnel linings are summarized, the relationships between main variables are explored, and a reasonable value range for the two fibers is determined, which can provide guidance for practical engineering.

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Section: Introductionmentioning

confidence: 99%

Study on the Fracture Resistance of Mixed Fiber Concrete Lining in a Reverse Fault Tunnel

Wang,

Huang,

Wang

et al. 2023

Applied Sciences

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“…Compared with steel fiber and carbon fiber, BF has the advantages of excellent mechanical properties, outstanding thermal properties, stable chemical properties, and excellent compatibility. Therefore, the study of BFRC has certain theoretical significance and practical value, and also plays an important guiding role in improving the performance of concrete [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Quantifying Computed Tomography of Basalt Fiber-Reinforced Concrete under Unconfined Compression

et al. 2022

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The macroscopic aspects of adding basalt fiber (BF) to concrete has been the subject of studies that document great increases in compression strength. Research into the microscopic aspects of the reinforcement mechanism is still in an exploratory stage, and the quantitative analysis and visual observation of fibers in the concrete matrix are difficult. In this paper, the reinforcement effect of fiber on concrete is studied by means of computed tomography (CT) scanning technology and digital image processing (DIP) technology, combined with the macro-mechanical properties obtained from the unconfined compression strength test, and quantitative analysis from the micro point of view. At the same time, the fiber visualization is realized with the help of Avizo. The results show that with the increase in fiber dosage, the peak stress of concrete first increases and then decreases. When the fiber dosage is 3 kg/m3, the peak stress is 44.4 MPa, which is 41.85% higher than that of ordinary concrete. Additionally, the proportion of macropores is the least, which is the best fiber dosage. It is found that when the fiber dosage is 3 kg/m3, the angular distribution of φ is relatively uniform, and the uniform distribution of fibers forms a dense network structure, which significantly increases the peak stress of concrete. However, when the fiber dosage is too high, it will lead to the accumulation of fibers and produce macropores, and these excess fibers mainly appear in the horizontal direction and do not contribute to the compression strength.

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“…ere are three main types of approaches for the analysis of seismic performance of underground structures: field investigations, model tests, and numerical simulations [8][9][10][11][12][13]. Numerical simulation methods have been widely used to analyse the dynamic response of tunnel structure in some bad conditions, but the computational ability of computers and the mechanical models needs to be studied further in the existing software.…”

Section: Introductionmentioning

confidence: 99%

Application of the Modified Mohr–Coulomb Yield Criterion in Seismic Numerical Simulation of Tunnels

Sui

Shen

Wen

et al. 2021

Shock and Vibration

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To solve the classical problem that the Mohr–Coulomb yield criterion overestimates the tensile properties of geotechnical materials, a modified Mohr–Coulomb yield criterion that includes both maximum tensile stress theory and smooth processing was established herein. The modified Mohr–Coulomb constitutive model is developed using the user-defined material subroutine (UMAT) available in finite element software ABAQUS, and the modified Mohr–Coulomb yield criterion is applied to construct a numerical simulation of a shaking table model test. Compared with the measured data from the shaking table test, the accuracies of the classical Mohr–Coulomb yield criterion and the modified Mohr–Coulomb yield criterion are assessed. Compared to the shaking table test, the classical Mohr–Coulomb model has a relatively large average error (−6.98% in peak acceleration values, −8.47% in displacement values, −23.93% in axial forces), while the modified Mohr–Coulomb model has a smaller average error (+2.71% in peak accelerations value, +3.19% in displacements value, +7.56% in axial forces). The results of numerical simulation using the modified Mohr–Coulomb yield criterion are closer to the measured data.

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Model Test on Bearing Characteristics of Basalt Fiber‐Reinforced Concrete Lining

Cited by 7 publications

References 20 publications

Study on the Fracture Resistance of Mixed Fiber Concrete Lining in a Reverse Fault Tunnel

Study on the Fracture Resistance of Mixed Fiber Concrete Lining in a Reverse Fault Tunnel

Quantifying Computed Tomography of Basalt Fiber-Reinforced Concrete under Unconfined Compression

Application of the Modified Mohr–Coulomb Yield Criterion in Seismic Numerical Simulation of Tunnels

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