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Title: | Investigation into the Multistage Mechanical Damage Behavior of Columnar Jointed Basalts with Different Meso-Constitutive Relations and Model Sizes |
Authors: | Wang, Y Gong, B Yang, X Tang, C |
Keywords: | columnar jointed basalts;damage behavior;acoustic emission;rock meso-constitutive relation;size effect;numerical simulation |
Issue Date: | 20-Oct-2023 |
Publisher: | GeoScienceWorld |
Citation: | Wang, Y. et al. (2023) 'Investigation into the Multistage Mechanical Damage Behavior of Columnar Jointed Basalts with Different Meso-Constitutive Relations and Model Sizes', Lithosphere, 2023 (1), 8711959, pp. 1 - 24. doi: 10.2113/2023/8711959. |
Abstract: | Copyright © 2023, Yongyi Wang et al. The mechanical characteristics of columnar jointed basalts (CJBs) are generally considered to be subject to size effects. They display complex mechanical behaviors under lateral pressure, which may be related to the variation in the rock's mesoproperties. In this study, many nonuniform CJB models with various rock meso-constitutive relations and model sizes were established, and their influences on the strength and deformation properties, multistage mechanical damage behavior, and acoustic emission characteristics of CJBs were investigated. The results show that, as the residual strength coefficient increases, the compressive strength of CJBs rises, and the equivalent deformation modulus of CJBs decreases or increases slightly; with an increase in the model size, the compressive strength slightly decreases at first and then varies moderately, and the equivalent deformation modulus shows a fluctuating trend. Furthermore, the macro stress–strain relationships can be divided into different stages according to the corresponding damage behaviors. The strains and energy accumulations before peak stress was reached were further analyzed. The results greatly improve our understanding of the collapse process of CJBs and the instability precursors of related structures. |
Description: | Data Availability: The datasets generated and/or analyzed during the current study are available from the corresponding author upon reasonable request. |
URI: | https://bura.brunel.ac.uk/handle/2438/26104 |
DOI: | https://doi.org/10.2113/2023/8711959 |
ISSN: | 1941-8264 |
Other Identifiers: | ORCID iD: Bin Gong https://orcid.org/0000-0002-9464-3423 8711959 |
Appears in Collections: | Dept of Civil and Environmental Engineering Research Papers |
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FullText.pdf | Copyright © 2023. Yongyi Wang et al. Exclusive Licensee GeoScienceWorld. Distributed under a Creative Commons Attribution License (CC BY 4.0). | 9.15 MB | Adobe PDF | View/Open |
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