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Applying bi-directional evolutionary structural optimisation method for tunnel reinforcement design considering nonlinear material behaviour

Nguyen, T., Ghabraie, K. and Tran-Cong, T. 2014, Applying bi-directional evolutionary structural optimisation method for tunnel reinforcement design considering nonlinear material behaviour, Computers and geotechnics, vol. 55, pp. 57-66, doi: 10.1016/j.compgeo.2013.07.015.

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Title Applying bi-directional evolutionary structural optimisation method for tunnel reinforcement design considering nonlinear material behaviour
Author(s) Nguyen, T.
Ghabraie, K.ORCID iD for Ghabraie, K. orcid.org/0000-0002-1043-3403
Tran-Cong, T.
Journal name Computers and geotechnics
Volume number 55
Start page 57
End page 66
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2014-01
ISSN 0266-352X
Keyword(s) topology optimisation
BESO method
nonlinear material behaviour
tunnel reinforcement
Summary 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.
Language eng
DOI 10.1016/j.compgeo.2013.07.015
Field of Research 010303 Optimisation
090506 Structural Engineering
090501 Civil Geotechnical Engineering
091308 Solid Mechanics
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2013, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30087023

Document type: Journal Article
Collection: School of Engineering
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