NDLI: Numerical modelling of centrifuge dynamic tests of circular tunnels in dry sand

Content Provider	Springer Nature Link
Author	Conti, Riccardo Viggiani, Giulia M. B. Perugini, Francesco
Copyright Year	2013
Abstract	This paper describes the numerical simulation of two dynamic centrifuge tests on reduced scale models of shallow tunnels in dry sand, carried out using both an advanced bounding surface plasticity constitutive soil model and a simple Mohr–Coulomb elastic-perfectly plastic model with embedded nonlinear and hysteretic behaviour. The predictive capabilities of the two constitutive models are assessed by comparing numerical predictions and experimental data in terms of accelerations at several positions in the model, and bending moment and hoop forces in the lining. Computed and recorded accelerations match well, and a quite good agreement is achieved also in terms of dynamic bending moments in the lining, while numerical and experimental values of the hoop force differ significantly with one another. The influence of the contact assumption between the tunnel and the soil is investigated by comparing the experimental data and the numerical results obtained with different interface conditions with the analytical solutions. The overall performance of the two models is very similar indicating that at least for dry sand, where shear-volumetric coupling is less relevant, even a simple model can provide an adequate representation of soil behaviour under dynamic conditions.
Starting Page	597
Ending Page	612
Page Count	16
File Format	PDF
ISSN	18611125
Journal	Acta Geotechnica
Volume Number	9
Issue Number	4
e-ISSN	18611133
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-10-31
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Centrifuge test Constitutive model Earthquake Interface friction Numerical analyses Tunnel Geoengineering, Foundations, Hydraulics Continuum Mechanics and Mechanics of Materials Geotechnical Engineering & Applied Earth Sciences Soil Science & Conservation Soft and Granular Matter, Complex Fluids and Microfluidics Structural Mechanics
Content Type	Text
Resource Type	Article
Subject	Geotechnical Engineering and Engineering Geology

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