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• W4214551036 endingPage "107202" @default.
• W4214551036 startingPage "107202" @default.
• W4214551036 abstract "The influences of the tunnel settlement on vibrations of the saturated poroelastic ground and on the additional forces of the tunnel lining are investigated numerically in this paper. A three-dimensional finite element model incorporating the metro train, the tunnel lining and the saturated ground has been established. The ground settlement is introduced into the computational model by a specifically developed vehicle-rail interaction (VRI) element, through which the metro train can be dynamically coupled to the track. The ground is considered as a saturated poroelastic medium that is discretized by a self-developed saturated-soil element based on Biot's theory. Moreover, at truncation boundaries of the ground model, an absorbing boundary condition termed multi-transmitting formula (MTF) that is specially developed for the saturated soil element is applied to meet the far-filed radiation condition. With the inputs of ground settlement data from in-situ measurement, amplifications in the ground vibration and the lining forces have been quantitatively determined by comparing to the settlement-free case. It is found that the ground vibrational velocity and acceleration can reach 40–60 times the responses when there is no differential settlement of the tunnel; the dynamic internal forces including the axial force, the shear force and the bending moment of the tunnel lining can be 7–20 times higher than their static counterparts. • The ground vibrational velocity and acceleration can be as high as 40–60 times the responses when there is no differential settlement of the tunnel. • The differential settlement of the tunnel has negligible influence on the vibration amplification zone at the ground surface. • The differential settlement of the tunnel not only induce static internal forces to the lining structure, but also prompt the wheel/rail interaction and considerably amplify the dynamic internal forces of the lining." @default.
• W4214551036 created "2022-03-02" @default.
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• W4214551036 date "2022-05-01" @default.
• W4214551036 modified "2023-10-18" @default.
• W4214551036 title "Numerical investigations on influences of tunnel differential settlement on saturated poroelastic ground vibrations and lining forces induced by metro train" @default.
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• W4214551036 doi "https://doi.org/10.1016/j.soildyn.2022.107202" @default.
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