000013290 001__ 13290
000013290 005__ 20161114160335.0
000013290 04107 $$aeng
000013290 046__ $$k2009-06-22
000013290 100__ $$aGupta, S.
000013290 24500 $$aNumerical modelling of vibrations from a thalys high speed train in the groene hart tunnel

000013290 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013290 260__ $$bNational Technical University of Athens, 2009
000013290 506__ $$arestricted
000013290 520__ $$2eng$$aThis paper presents a numerical study of vibrations due to a Thalys high speed train in the Groene Hart tunnel. The Groene Hart tunnel is part of the high speed link South between Amsterdam and Antwerp and is the world’s largest bored tunnel with an external diameter of 14 m. A coupled periodic finite element-boundary element model is used to predict the free field response due to the passage of a Thalys high speed train in the Groene Hart tunnel. A subdomain formulation is used, where the track and the tunnel are modelled using a finite element method, while the soil is modelled as a layered half space using a boundary element method. The tunnel and the soil are assumed to be invariant in the longitudinal direction, but modelled as a periodic structure using the Floquet transformation. A general analytical formulation to compute the response of three-dimensional periodic media excited by moving loads is adopted. The Groene Hart area is marshy and therefore completely saturated. The top soil consists of layers of peat and clay which have a very low density and shear wave velocity. The numerical model allows to understand the effect of these soft layers on vibration levels, resulting in an amplification of the horizontal response and a large contribution of the quasi-static forces at high train speeds. Vibration levels are assessed using the Dutch SBR guidelines and the possibility of annoyance to people in the Groene Hart area is investigated. It is concluded from the study that the operation of high speed railway traffic in the Groene Hart tunnel is not expected to cause serious vibration problems. This study prospers a better understanding in the generation and propagation of vibrations due to a passage of a high speed train in a tunnel and demonstrates the use of advanced numerical models for analyzing complex engineering problems.

000013290 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013290 653__ $$aHigh speed train induced vibrations – Groene Hart tunnel – coupled periodic finite element-boundary element model – dynamic vehicle-track interaction – dynamic track-tunnelsoil interaction Abstract. This paper presents a numerical study of vibrations due to a Thalys high speed train in the Groene Hart tunnel. The Groene Hart tunnel is part of the high speed link South between Amsterdam and Antwerp and is the world’s largest bored tunnel with an external diameter of 14 m. A coupled periodic finite element-boundary element model is used to predict the free field response due to the passage of a Thalys high speed train in the Groene Hart tunnel. A subdomain formulation is used, where the track and the tunnel are modelled using a finite element method, while the soil is modelled as a layered half space using a boundary element method. The tunnel and the soil are assumed to be invariant in the longitudinal direction, but modelled as a periodic structure using the Floquet transformation. A general analytical formulation to compute the response of three-dimensional periodic media excited by moving loads is adopted. The Groene Hart area is marshy and therefore completely saturated. The top soil consists of layers of peat and clay which have a very low density and shear wave velocity. The numerical model allows to understand the effect of these soft layers on vibration levels, resulting in an amplification of the horizontal response and a large contribution of the quasi-static forces at high train speeds. Vibration levels are assessed using the Dutch SBR guidelines and the possibility of annoyance to people in the Groene Hart area is investigated. It is concluded from the study that the operation of high speed railway traffic in the Groene Hart tunnel is not expected to cause serious vibration problems. This study prospers a better understanding in the generation and propagation of vibrations due to a passage of a high speed train in a tunnel and demonstrates the use of advanced numerical models for analyzing complex engineering problems.

000013290 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013290 720__ $$aGupta, S.$$iVan den Berghe, H.$$iLombaert, G.$$iDegrande, G.
000013290 8560_ $$ffischerc@itam.cas.cz
000013290 8564_ $$s1002942$$uhttps://invenio.itam.cas.cz/record/13290/files/CD432.pdf$$yOriginal version of the author's contribution as presented on CD, section: Dynamic effects on high-speed railway tracks - iii (MS).
000013290 962__ $$r13074
000013290 980__ $$aPAPER