Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Laboratory test and numerical simulations for 3D printed irregular columnar jointed rock masses under biaxial compression
Abstract The columnar jointed rock mass (CJRM) has irregular structures, which significantly influence its mechanical properties and failure characteristics. Previously, it is difficult to produce CJRM specimens with the same structure for multiple repeated tests. Thus, in this study, the 3D printed (3DP) block models of CJRM with different inclination angles were reconstructed. In addition, the digital image processing (DIP) was applied to conduct 3D analysis of the failure processes. By carrying out laboratory tests and numerical calculations, the failure modes and mechanical properties of irregular CJRM under different biaxial compression conditions were determined. In laboratory tests, when the biaxial pressure was 0.5 MPa and the inclination angles were different, the 3DP block models of CJRM underwent tensile failure, tensile-shear failure, shear-slip failure, and disintegration failure along the axial joint surface, respectively. Meanwhile, according to the numerical simulations, the failure modes of the numerical model at biaxial pressures of 2 MPa and 5 MPa were similar to those of 0.5 MPa in general. Under different inclination angles, the mechanical parameters of the CJRMs were closely correlated with the biaxial pressure. The peak strength increased as the biaxial pressure increased, and the relationship curve between the peak strain and biaxial pressure was approximately U-shaped. In addition, the anisotropy coefficients (ACs) of the mechanical parameters constantly decreased and approached stability as the biaxial pressure increased. The numerical models and 3DP block models were consistent in terms of the failure modes, acoustic emission (AE), and mechanical properties.
Laboratory test and numerical simulations for 3D printed irregular columnar jointed rock masses under biaxial compression
Abstract The columnar jointed rock mass (CJRM) has irregular structures, which significantly influence its mechanical properties and failure characteristics. Previously, it is difficult to produce CJRM specimens with the same structure for multiple repeated tests. Thus, in this study, the 3D printed (3DP) block models of CJRM with different inclination angles were reconstructed. In addition, the digital image processing (DIP) was applied to conduct 3D analysis of the failure processes. By carrying out laboratory tests and numerical calculations, the failure modes and mechanical properties of irregular CJRM under different biaxial compression conditions were determined. In laboratory tests, when the biaxial pressure was 0.5 MPa and the inclination angles were different, the 3DP block models of CJRM underwent tensile failure, tensile-shear failure, shear-slip failure, and disintegration failure along the axial joint surface, respectively. Meanwhile, according to the numerical simulations, the failure modes of the numerical model at biaxial pressures of 2 MPa and 5 MPa were similar to those of 0.5 MPa in general. Under different inclination angles, the mechanical parameters of the CJRMs were closely correlated with the biaxial pressure. The peak strength increased as the biaxial pressure increased, and the relationship curve between the peak strain and biaxial pressure was approximately U-shaped. In addition, the anisotropy coefficients (ACs) of the mechanical parameters constantly decreased and approached stability as the biaxial pressure increased. The numerical models and 3DP block models were consistent in terms of the failure modes, acoustic emission (AE), and mechanical properties.
Laboratory test and numerical simulations for 3D printed irregular columnar jointed rock masses under biaxial compression
Zhao, Danchen (Autor:in) / Xia, Yingjie (Autor:in) / Zhang, Chuanqing (Autor:in) / Zhou, Hui (Autor:in) / Tang, Chun’an (Autor:in) / Liu, Ning (Autor:in) / Chen, Jun (Autor:in) / Wang, Peng (Autor:in) / Wang, Chenglong (Autor:in)
2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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Permeability Anisotropy of Columnar Jointed Rock Masses
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Anisotropic characteristic of irregular columnar-jointed rock mass based on physical model test
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