2D numerical investigation of segmental tunnel lining under seismic loading |
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| Institution: | 1. Hanoi University of Mining and Geology, Faculty of Civil Engineering, Department of Underground and Mining Construction, Hanoi, Vietnam;2. Grenoble Alpes University, Laboratory 3SR, 38401 Grenoble Cedex 9, France;3. Politecnico of Torino, Department of Environmental, Land and Infrastructural Engineering, Torino, Italy;4. University of Lyon, INSA of Lyon, Laboratory LGCIE, Villeurbanne, France;1. Faculty of Civil Engineering, University of Tabriz, Iran;2. Faculty of Engineering, Azarbaijan Shahid Madani University, Iran;3. Department of Mining Engineering, Sahand University of Technology, Tabriz, Iran;1. Department of Geotechnical Engineering, Tongji University, Shanghai, China;2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, China;3. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China;4. Department of Civil and Environmental Engineering, University of California, Berkeley, Berkeley, CA 94720-1710, USA;5. Civil, Structural and Environmental Engineering, University College Cork, Cork, Ireland;1. ETH Zurich, Switzerland;2. Basler & Hofmann AG, Switzerland;1. College of Civil Engineering, Tongji University, Shanghai, China;2. State Key Laboratory for Hazard Reduction in Civil Engineering, Tongji University, Shanghai, China;3. College of Civil Engineering, Ningbo University, Ningbo, China |
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| Abstract: | Segmental tunnel linings are now often used for seismic areas. However, the influence of segment joints on the segmental lining behavior under seismic loading has not been thoroughly considered in the literature. This paper presents a numerical study, which has been performed under seismic circumstance, to investigate the factors that affect segmental tunnel lining behavior. Analyses have been carried out using a two-dimensional finite difference element model. The proposed model allows studying the effect of the rotational joint stiffness, radial stiffness and the axial stiffness of the longitudinal joints. The numerical results show that a segmental lining can perform better than a continuous lining during earthquake. It has been seen that the influence of the joint distribution, the joint rotational stiffness, the joint axial stiffness, Young?s modulus of the ground surrounding the tunnel, the lateral earth pressure factor and the maximum shear strain should not be neglected. Some important differences of the segmental tunnel lining behavior under static and seismic conditions have been highlighted. |
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| Keywords: | Seismic analyses Earthquake effect on tunnel Segmental tunnel lining Joint stiffness Numerical model Structural lining forces |
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