The Influence of Different Shear Directions on the Shear Resistance Characteristics of Rock Joints
Auteur(s): |
Xipeng Lai
Wei Yuan Wei Wang Ruifeng Sun Pengzhao Du Hang Lin Xiaodong Fu Qinghe Niu Chao Yin |
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Médium: | article de revue |
Langue(s): | anglais |
Publié dans: | Buildings, 10 octobre 2023, n. 10, v. 13 |
Page(s): | 2556 |
DOI: | 10.3390/buildings13102556 |
Abstrait: |
The joint roughness coefficient JRC of rock joints is an important parameter for measuring the geometric morphology of rock joints. However, the parameter obtained from traditional calculation methods has certain limitations in reflecting the differences in shear strength of rock joints in different shear directions with the same orientation. Firstly, native joint surface test blocks were cast using three-dimensional reverse reconstruction technology. Subsequently, direct shear tests were conducted under different normal stress and shear direction conditions, followed by numerical simulations using the finite difference software Flac3d. The JRC coefficient calculation method proposed by Yuan was modified and extended by considering the percentage of climbing sections and the effective contact area during the ramping process. This study indicates that the numerical simulation results are in good agreement with the shear test results. The introduction of the shear climbing rate SCR and the curvature coefficient of profile CCP is used to reflect the geometric differences of the joint surfaces in different shear directions. These two parameters are nonlinearly fitted with the experimental results, leading to a calculation formula that characterizes the shear strength characteristics of the joint surfaces in different shear directions. This novel formula is an extension of the JRC–JCS model. |
Copyright: | © 2023 by the authors; licensee MDPI, Basel, Switzerland. |
License: | Cette oeuvre a été publiée sous la license Creative Commons Attribution 4.0 (CC-BY 4.0). Il est autorisé de partager et adapter l'oeuvre tant que l'auteur est crédité et la license est indiquée (avec le lien ci-dessus). Vous devez aussi indiquer si des changements on été fait vis-à-vis de l'original. |
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10744584 - Publié(e) le:
28.10.2023 - Modifié(e) le:
07.02.2024