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Z.X. Fan¹, Y. Yuan^1,2 and Y.S. Yang³

¹Department of Geotechnical Engineering, Tongji University, Shanghai, China
²State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China
³Shanghai Construction No.4 (Group) Co., Ltd., China

doi:10.4203/ccc.6.3.1

Z.X. Fan, Y. Yuan, Y.S. Yang, "Seismic Analysis of Twin Tunnels Situated in Liquefiable Grounds using the Domain Reduction Method", in P. Ivanyi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Seventeenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 6, Paper 3.1, 2023, doi:10.4203/ccc.6.3.1

Keywords: earthquake, liquefaction, domain reduction method, finite element method, layered grounds, twin tunnels.

Abstract

This paper presents a novel numerical approach based on the domain reduction method (DRM) for the dynamic analysis of twin tunnels constructed in liquefiable double-layered grounds during earthquakes. The proposed method extends the DRM scheme into saturated layered fields, allowing for accurate reproduction of the seismic wavefield within a non-linear liquefiable subdomain. This novel approach is employed to conduct a parametric analysis of the internal force responses of tunnel linings, investigating the influence of the stiffness ratio of neighboring soil layers, the spacing-radius ratio of twin tunnels, and the angle of incident seismic waves. The results indicate that all three parameters have nonnegligible influences on the tunnel’s maximum internal forces.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 6 PROCEEDINGS OF THE SEVENTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: P. Ivanyi, J. Kruis and B.H.V. Topping Paper 3.1 Seismic Analysis of Twin Tunnels Situated in Liquefiable Grounds using the Domain Reduction Method Z.X. Fan¹, Y. Yuan^1,2 and Y.S. Yang³ ¹Department of Geotechnical Engineering, Tongji University, Shanghai, China ²State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China ³Shanghai Construction No.4 (Group) Co., Ltd., China doi:10.4203/ccc.6.3.1 Full Bibliographic Reference for this paper Z.X. Fan, Y. Yuan, Y.S. Yang, "Seismic Analysis of Twin Tunnels Situated in Liquefiable Grounds using the Domain Reduction Method", in P. Ivanyi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Seventeenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 6, Paper 3.1, 2023, doi:10.4203/ccc.6.3.1 Keywords: earthquake, liquefaction, domain reduction method, finite element method, layered grounds, twin tunnels. Abstract This paper presents a novel numerical approach based on the domain reduction method (DRM) for the dynamic analysis of twin tunnels constructed in liquefiable double-layered grounds during earthquakes. The proposed method extends the DRM scheme into saturated layered fields, allowing for accurate reproduction of the seismic wavefield within a non-linear liquefiable subdomain. This novel approach is employed to conduct a parametric analysis of the internal force responses of tunnel linings, investigating the influence of the stiffness ratio of neighboring soil layers, the spacing-radius ratio of twin tunnels, and the angle of incident seismic waves. The results indicate that all three parameters have nonnegligible influences on the tunnel’s maximum internal forces. download the full-text of this paper (PDF, 2171 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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