[en] A numerical model is presented to predict vibrations in the free field from excitation due to metro trains in tunnels. The three-dimensional dynamic tunnel–soil interaction problem is solved with a subdomain formulation, using a finite element formulation for the tunnel and a boundary element method for the soil. The periodicity of the geometry in the longitudinal direction of the tunnel is exploited using the Floquet transform, limiting the discretization to a single-bounded reference cell. The responses of two different types of tunnel due to a harmonic load on the tunnel invert are compared, both in the frequency–wavenumber and spatial domains. The first tunnel is a shallow cut-and-cover masonry tunnel on the Paris metro network, embedded in layers of sand, while the second tunnel is a deep bored tunnel of London Underground, with a cast iron lining and embedded in the London clay.
Disciplines :
Mechanical engineering
Author, co-author :
Degrande, Geert; Katholieke Universiteit Leuven - KUL > Departement Burgerlijke Bouwkunde
Clouteau, Didier; Ecole Centrale Paris > Laboratoire des Sols, Structures et Matériaux
Othman, Ramzi; Ecole Centrale Paris > Laboratoire des Sols, Structures et Matériaux
Arnst, Maarten ; Ecole Centrale Paris > Laboratoire des Sols, Structures et Matériaux
Chebli, Hamid; Ecole Centrale Paris > Laboratoire des Sols, Structures et Matériaux
Klein, Ralf; Katholieke Universiteit Leuven - KUL > Departement Burgerlijke Bouwkunde
Chatterjee, Pranesh; Katholieke Universiteit Leuven - KUL > Departement Burgerlijke Bouwkunde
Janssens, Bram; Katholieke Universiteit Leuven - KUL > Departement Burgerlijke Bouwkunde
Language :
English
Title :
A numerical model for ground-borne vibrations from underground railway traffic based on a periodic finite element–boundary element formulation
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