Applying bi-directional evolutionary structural optimisation method for tunnel reinforcement design considering nonlinear material behaviour
Article
Article Title | Applying bi-directional evolutionary structural optimisation method for tunnel reinforcement design considering nonlinear material behaviour |
---|---|
ERA Journal ID | 3466 |
Article Category | Article |
Authors | Nguyen, T. (Author), Ghabraie, K. (Author) and Tran-Cong, T. (Author) |
Journal Title | Computers and Geotechnics |
Journal Citation | 55, pp. 57-66 |
Number of Pages | 10 |
Year | 2014 |
Publisher | Elsevier |
Place of Publication | Oxford, United Kingdom |
ISSN | 0266-352X |
1873-7633 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.compgeo.2013.07.015 |
Abstract | In the empirical methods for reinforcement design of underground excavations, an even distribution of rock bolts is generally recommended. This work proves that this design is not necessarily optimal and shows how the state-of-the-art reinforcement design could be improved through topology optimisation techniques. The Bidirectional Evolutionary Structural Optimisation (BESO) method has been extended to consider nonlinear material behaviour. An elastic perfectly-plastic Mohr-Coulomb model is utilised for both original rock and reinforced rock. External work along the tunnel wall is considered as the objective function. Various in situ stress conditions with different horizontal stress ratios and different geostatic stress magnitudes are investigated through several examples. The outcomes show that the proposed approach is capable of improving tunnel reinforcement design. Also, significant difference in optimal reinforcement distribution for the cases of linear and nonlinear analysis results proves the importance of the influence of realistic nonlinear material properties on the final outcome. |
Keywords | BESO method; nonlinear material behaviour; topology optimisation; tunnel reinforcement |
ANZSRC Field of Research 2020 | 400510. Structural engineering |
490412. Topology | |
401706. Numerical modelling and mechanical characterisation | |
Public Notes | © 2013 Elsevier Ltd. Published version deposited in accordance with the copyright policy of the publisher. |
Byline Affiliations | Computational Engineering and Science Research Centre |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2100/applying-bi-directional-evolutionary-structural-optimisation-method-for-tunnel-reinforcement-design-considering-nonlinear-material-behaviour
1916
total views7
total downloads0
views this month0
downloads this month