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Geomechanics and Engineering Volume 16, Number 5, December10 2018 , pages 471-482 DOI: https://doi.org/10.12989/gae.2018.16.5.471 |
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A systematic approach to the calibration of micro-parameters for the flat-jointed bonded particle model |
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Changtai Zhou, Chaoshui Xu, Murat Karakus and Jiayi Shen
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| Abstract | ||
| A flat-jointed bonded-particle model (BPM) has been proved to be an effective tool for simulating mechanical behaviours of intact rocks. However, the tedious and time-consuming calibration procedure imposes restrictions on its widespread application. In this study, a systematic approach is proposed for simplifying the calibration procedure. The initial relationships between the microscopic, constitutive parameters and macro-mechanical rock properties are firstly determined through dimensionless analysis. Then, sensitivity analyses and regression analyses are conducted to quantify the relationships, using results from numerical simulations. Finally, four examples are used to demonstrate the effectiveness and robustness of the proposed systematic approach for the calibration procedure of BPMs. | ||
| Key Words | ||
| discrete element method; bonded-particle model; flat-jointed model; micro-parameters; macro-rock properties; intact rocks | ||
| Address | ||
| Changtai Zhou and Murat Karakus: School of Civil, Environmental and Mining Engineering, The University of Adelaide, Adelaide, Australia Chaoshui Xu: 1.) School of Civil, Environmental and Mining Engineering, The University of Adelaide, Adelaide, Australia 2.) School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, China Jiayi Shen: Institute of Port, Coastal and Offshore Engineering, Zhejiang University, Hangzhou, China | ||