Mechanical testing and numerical simulation of intelligent terminal structure of rockbolt used as a deformable support and for safety monitoring in rock engineering

Sun, Huan; Liu, Hao; Liu, Xiaoli; Ye, Zhenni

doi:10.1016/j.tust.2024.105769

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…In order to measure and record the deformation field on the surface of the specimen during loading, speckle interferometry is used in the experiment, so it is necessary to preprocess the surface of the test piece. The specific steps are as follows: (1) uniformly spraying a layer of white ordinary particle paint on the surface of the specimen to form a coating, and then naturally air drying to form a white base layer; (2) properly spraying a layer of black particle paint on the white coating to form random black speckle points, as shown in the specific process in Fig. 1.…”

Section: B Uniaxial Compression Testmentioning

confidence: 99%

“…The failure and cracking process on small-scale specimens, as well as the phenomenon of instability and failure at the engineering scale, such as in large-scale hydraulic engineering, deep underground engineering, protective engineering, marine engineering projects, etc., are often caused by excessive deformation of rock masses. [1][2][3] The deformation process of rock masses generally undergoes homogeneous deformation, non-uniform deformation, and the occurrence of strain concentration. When the strain concentration reaches a certain degree, obvious localized strain features appear, resulting in the formation of multiple localized strain bands.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and experimental study of strain localization phenomenon based on phase transition theory

Yan,

Wang,

Liu

et al. 2024

Physics of Fluids

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In the study of large-scale localized strain features, localized strain can lead to energy release and seismic effects. From the macroscopic process of localized strain, it is found that localized deformation is accompanied by structural weakening, which is due to phase changes in rocks. The phase change corresponds to the secondary phase transition process in physics. The present study illustrates this phenomenon from the perspective of secondary phase transition theory in statistical physics, combining the localized strain features on a large scale. Theoretical analysis and experimental studies were carried out using three brittle rocks, including marble, granite and red sandstone. First, two perturbation methods, i.e., Krylov–Bogoliubov method and Poincare method, are used to calculate the higher-order control equations in analytical model. The influences of control equation coefficients on the strain localization process are analyzed. Then the uniaxial compression tests are carried out on the three rocks to record the strain process. Finally, the theoretical and experimental results are compared to analyze the strain localization phenomenon. The comparison results show that both the Krylov–Bogoliubov solution and the Poincare solution in the analytical model can well describe the evolution characteristics of localized strain. It indicates that the theoretical model is valid and has high accuracy. The Poincare method better simulates the nonlinear phenomenon of strain localization. The present study provides a new theoretical method to better understand the strain localization phenomenon.

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Section: B Uniaxial Compression Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental study of strain localization phenomenon based on phase transition theory

Yan,

Wang,

Liu

et al. 2024

Physics of Fluids

Self Cite

View full text Add to dashboard Cite

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Analyzing the Impact of Deep Excavation on Retaining Structure Deformation Based on Element Tracking

Tan,

Lei,

Wang

et al. 2024

Buildings

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In the simulation of foundation pit excavation, the traditional element birth–death method commonly used tends to encounter issues such as uncoordinated deformation and changes in the constitutive model, affecting the accuracy of the prediction results. To address these issues, this study proposes the use of element tracking. By duplicating elements for temporary supports or structures requiring changes in material properties and appropriately activating or deactivating them at the right moments, the simulation of the foundation pit excavation process can be achieved more precisely. Using the construction process of the Tangxi Passenger Transport Station’s comprehensive transportation hub foundation pit as an example, this study applied the proposed simulation method and compared the results with actual measurements, demonstrating its effectiveness. This research offers a more accurate approach for simulating foundation pit excavation and provides a reference for similar numerical simulation problems.

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Mechanical testing and numerical simulation of intelligent terminal structure of rockbolt used as a deformable support and for safety monitoring in rock engineering

Cited by 2 publications

References 23 publications

Theoretical and experimental study of strain localization phenomenon based on phase transition theory

Theoretical and experimental study of strain localization phenomenon based on phase transition theory

Analyzing the Impact of Deep Excavation on Retaining Structure Deformation Based on Element Tracking

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