Shape and reinforcement optimization of underground tunnels

Ghabraie, K, Xie, Y, Huang, X and Ren, G 2010, 'Shape and reinforcement optimization of underground tunnels', Journal of Computational Science and Technology, vol. 4, no. 1, pp. 51-63.

Document type: Journal Article
Collection: Journal Articles

Title Shape and reinforcement optimization of underground tunnels
Author(s) Ghabraie, K
Xie, Y
Huang, X
Ren, G
Year 2010
Journal name Journal of Computational Science and Technology
Volume number 4
Issue number 1
Start page 51
End page 63
Total pages 13
Publisher The Japan Society of Mechanical Engineers
Abstract Design of support system and selecting an optimum shape for the opening are two important steps in designing excavations in rock masses. Currently selecting the shape and support design are mainly based on designer's judgment and experience. Both of these problems can be viewed as material distribution problems where one needs to find the optimum distribution of a material in a domain. Topology optimization techniques have proved to be useful in solving these kinds of problems in structural design. Recently the application of topology optimization techniques in reinforcement design around underground excavations has been studied by some researchers. In this paper a three-phase material model will be introduced changing between normal rock, reinforced rock, and void. Using such a material model both problems of shape and reinforcement design can be solved together. A well-known topology optimization technique used in structural design is bi-directional evolutionary structural optimization (BESO). In this paper the BESO technique has been extended to simultaneously optimize the shape of the opening and the distribution of reinforcements. Validity and capability of the proposed approach have been investigated through some examples.
Subject Civil Geotechnical Engineering
Keyword(s) underground excavation
tunnel reinforcement
topology optimization
shape optimization
finite element analysis
DOI - identifier 10.1299/jcst.4.51
Copyright notice Copyright 2010 JMSE
ISSN 18816894
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