Performance-Based Evaluation of a Double-Deck Tunnel and Design Optimization

Kyung-Nam Kang, Sang-Hyun Lee, Ki-Il Song, Lang Liu , Shervin Motamedi

Research output: Contribution to journalArticle

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Abstract

The double-deck tunnel is well known as smart infrastructure because multiple sections can be used for various purposes. Although the stability of a double-deck tunnel is mainly governed by the intermediate slab, the effect of various governing factors on tunnel structural stability has not been fully investigated. In this study, performance-based evaluation method for a double-deck tunnel is suggested as a three-dimensional matrix considering the life cycle of a double-deck tunnel. Moreover, a customized software for design and maintenance of a double-deck tunnel is developed. A structural analysis solver based on a beam–spring model for a double-deck tunnel was embedded in this code. The effects of connection type as well as depth of tunnel, ground stiffness and traffic load on structural behavior of tunnel were investigated. From the analysis, it was found that the connection type between segment lining and intermediate slab significantly affects the behavior of segment lining: simply connected condition causes lesser stress and moment than fully fixed condition. The deeper the tunnel depth, the greater the member force of segment lining. In addition, as both the tunnel depth and the ground stiffness increase, the influence of connection type on the structural stability of the double-deck tunnel becomes insignificant.
Original languageEnglish
Article number201
Number of pages20
JournalSustainability
Volume11
Issue number1
DOIs
Publication statusPublished - 3 Jan 2019

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Tunnels
tunnel
evaluation
performance
structural analysis
life cycle
Linings
traffic
infrastructure
cause
Design optimization
stiffness
slab
Stiffness
Structural analysis
Life cycle
Loads (forces)
software
matrix

Bibliographical note

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

Keywords

  • Double-deck tunnel
  • Performance-based evaluation
  • Beam–spring analysis
  • Intermediate slab

Cite this

Performance-Based Evaluation of a Double-Deck Tunnel and Design Optimization. / Kang, Kyung-Nam; Lee, Sang-Hyun; Song, Ki-Il; Liu , Lang; Motamedi, Shervin.

In: Sustainability, Vol. 11, No. 1, 201, 03.01.2019.

Research output: Contribution to journalArticle

Kang, Kyung-Nam ; Lee, Sang-Hyun ; Song, Ki-Il ; Liu , Lang ; Motamedi, Shervin. / Performance-Based Evaluation of a Double-Deck Tunnel and Design Optimization. In: Sustainability. 2019 ; Vol. 11, No. 1.
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