Vibration analysis of a circular tunnel with jointed liners embedded in an elastic medium subjected to seismic waves

Dong-Sheng Jeng, Jian-Fei Lu

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    1 Citation (Scopus)

    Abstract

    This paper presents a frequency domain analysis of a circular tunnel with piecewise liners subjected to seismic waves. In our model, the surrounding medium of the tunnel is considered as a linear elastic medium and described by the dynamic elasticity theory, while piecewise liners and connecting joints are treated as curved beams and described by a curved beam theory. Scattered wave field in the surrounding elastic medium are obtained by the wave function expansion approach. The governing equations for vibrations of a curved beam are discretized by the general differential quadrature method. We use domain decomposition methods to establish the global discrete dynamic equations for piecewise liners. Boundary least squares collocation methods, based on the continuity conditions of stresses and displacements between surrounding soil and the piecewise liners, are used to determine the response of the liners and the surrounding medium. Numerical results conclude that the presence of the joints significantly changes the distributions of the tunnel internal force, and dramatically increase shear forces and moment of the tunnel liners around joints.
    Original languageEnglish
    JournalJournal of Vibration and Acoustics
    Volume131
    Issue number2
    DOIs
    Publication statusPublished - Apr 2009

    Keywords

    • Tunnel liner
    • Curved beam
    • Centeral Differential Quadrature method
    • Frequency domain

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