Simultaneous pattern and size optimisation of rock bolts for underground excavations
Article
Article Title | Simultaneous pattern and size optimisation of rock bolts for underground excavations |
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ERA Journal ID | 3466 |
Article Category | Article |
Authors | Nguyen, Tin (Author), Ghabraie, Kazem (Author) and Tran-Cong, Thanh (Author) |
Journal Title | Computers and Geotechnics |
Journal Citation | 66, pp. 264-277 |
Number of Pages | 14 |
Year | 2015 |
Publisher | Elsevier |
Place of Publication | Kidlington, OX. United Kingdom |
ISSN | 0266-352X |
1873-7633 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.compgeo.2015.02.007 |
Abstract | Designing a rock bolt reinforcement system for underground excavation involves determining bolt pattern, spacing, and size. In this paper, a topology optimisation technique is presented and employed to simultaneously optimise these design variables. To improve rock bolt design, the proposed technique minimises a displacement based function around the opening after bolt installation. This optimisation technique is independent of the material model and can be easily applied to any material model for rock and bolts. It is also extremely flexible in that it can be applied to any mechanical analysis method. To illustrate the capabilities of this method, numerical examples with non-linear material models and discontinuities in the host rock are presented. It is shown that the complexity of systems optimised using this approach is only restricted by limitations of the method used to analyse mechanical system responses. |
Keywords | layout optimisation; rock bolts; size optimisation; topology optimisation; tunnel reinforcement; underground excavation |
ANZSRC Field of Research 2020 | 400502. Civil geotechnical engineering |
401902. Geomechanics and resources geotechnical engineering | |
490412. Topology | |
Public Notes | Copyright 2015 Elsevier Ltd. Permanent restricted access to published version due to publisher copyright policy. |
Byline Affiliations | Computational Engineering and Science Research Centre |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2xxx/simultaneous-pattern-and-size-optimisation-of-rock-bolts-for-underground-excavations
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