Rheological Analysis of Tunnel Excavation by Means of Coupled Finite Element (FEM) - Boundary Element (BEM) Analysis

G. Swoboda, W. Mertz, Gernot Beer

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To facilitate the practical numerical analysis of tunnel structures by means of the finite element method in the case of viscoplastic properties of the rock mass and viscoelastic properties of the shotcrete, this method is coupled to boundary elements. In this way, the unchanged properties of the boundary element region provide enormous savings in computing time. In order to improve the numerical stability of such calculations, a variable time‐step analysis was employed for each time step with an iterative correction method. Characteristic values are obtained from measured values by back‐analysis.
Original languageEnglish
Pages (from-to)115-129
JournalInternational Journal for Numerical and Analytical Methods in Geomechanics
Issue number2
Publication statusPublished - 1987

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