DEM Simulations of the Seismic Response of Tunnels Embedded in Granular Deposits
Publication: Geo-Congress 2024
ABSTRACT
The study examines the seismic response of tunnels constructed in a layer of cohesionless soil of depths more than 20 m. The soil assembly and tunnel lining were modeled using three-dimensional discrete-element method (DEM) simulations. Soil particles were modeled as rigid spherical particles that may overlap at contact locations. The tunnel lining was modeled as a flexible structure composed of particles bonded together with cementitious bonds to mimic the physical features of a real tunnel. Free-field boundaries were utilized at the model’s lateral sides to prevent the propagating wave’s reflections back to the domain and employ the free-field motion. The DEM computational framework was validated using published centrifuge test results, and the numerical simulation results reveal good agreement with the experimental test results when subjected to the same input motion.
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Information & Authors
Information
Published In
Geo-Congress 2024
Pages: 152 - 161
History
Published online: Feb 22, 2024
ASCE Technical Topics:
- Cohesionless soils
- Construction engineering
- Construction methods
- Discrete element method
- Earthquake engineering
- Engineering fundamentals
- Engineering materials (by type)
- Geomechanics
- Geotechnical engineering
- Linings
- Materials engineering
- Methodology (by type)
- Models (by type)
- Numerical methods
- Particles
- Seismic effects
- Seismic tests
- Soil mechanics
- Soils (by type)
- Tests (by type)
- Three-dimensional models
- Tunnels
Authors
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