CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Coupled simulation of wave propagation and water flow in soil induced by high-speed trains

Per Kettil (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Bernd Lenhof (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Kenneth Runesson (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Nils-Erik Wiberg (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik)
International Journal for Numerical and Analytical Methods in Geomechanics (0363-9061). Vol. 32 (2008), 11, p. 1311-1319.
[Artikel, refereegranskad vetenskaplig]

The purpose of this paper is to simulate the coupled dynamic deformation and water flow that occur in saturated soils when subjected to traffic loads, which is a problem with several practical applications. The wave propagation causes vibrations leading to discomfort for passengers and people in the surroundings and increase wear on both the vehicle and road structure. The water flow may cause internal erosion and material transport in the soil. Further, the increased pore water pressure could reduce the bearing capacity of embankments. The saturated soil is modelled as a water-saturated porous medium. The traffic is modelled as a number of moving wheel contact loads. Dynamic effects are accounted for, which lead to a coupled problem with solid displacements, water velocity and pressure as primary unknowns. A finite element program has been developed to perform simulations. The simulations clearly demonstrate the induced wave propagation and water flow in the soil. The simulation technique is applicable to railway as well as road traffic.

Nyckelord: coupled, dynamic, porous media, deformation, water flow, wave propagation, high-speed train, finite element



Denna post skapades 2009-01-09. Senast ändrad 2015-06-12.
CPL Pubid: 84798