A 2.5D coupled FE–BE methodology for the dynamic interaction between longitudinally invariant structures and a layered halfspace

François, Stijn; Schevenels, Mattias; Galvín, P.; Lombaert, Geert; Degrande, Geert

doi:10.1016/j.cma.2010.01.001

Cited by 191 publications

(182 citation statements)

References 23 publications

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“…A dynamic soil-structure interaction problem with 2D geometry is solved for each frequency ω and wavenumber k y by means of a coupled FE-BE methodology and the 3D solution is obtained by an inverse Fourier transformation with respect to the wavenumber k y . The reader is referred to the literature for a comprehensive overview of this methodology [56].…”

Section: Methodsologymentioning

confidence: 99%

Efficacy of a sheet pile wall as a wave barrier for railway induced ground vibration

Dijckmans

Ekblad

Smekal

et al. 2016

Soil Dynamics and Earthquake Engineering

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This paper investigates the effectiveness of a sheet pile wall to reduce railway induced vibration transmission by means of field measurements and numerical simulations. At Furet, Sweden, a sheet pile wall has been installed in the soil near the track to reduce train induced vibrations in houses close to the track. The depth of the sheet piles is 12 m with every fourth pile extended to 18 m. The efficacy of the wall is determined from in situ measurements of free field vibrations during train passages before and after installation of the sheet pile wall. The field test shows that the sheet pile wall reduces vibrations from 4 Hz upwards. Up till 16 − 20 Hz, the performance generally increases with frequency and typically decreases with increasing distance behind the wall. The performance is further studied by means of two-and-a-half-dimensional coupled finite element -boundary element models. The sheet pile wall is modeled as an orthotropic plate using finite elements, while the soil is modeled as a layered halfspace using boundary elements. The sheet pile wall acts as a stiff wave barrier and the efficacy is determined by the depth and the stiffness contrast with soil. The reduction of vibration levels is entirely due to the relatively high axial stiffness and plate bending stiffness with respect to the horizontal axis of the sheet pile wall; the plate bending stiffness with respect to the vertical axis is too low to affect the transmission of vibrations. Therefore, it is important to take into account the orthotropic behaviour of the sheet pile wall. It is concluded that a sheet pile wall can effectively act as a wave barrier in soft soil conditions provided that the wall is sufficiently deep.

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Section: Methodsologymentioning

confidence: 99%

Efficacy of a sheet pile wall as a wave barrier for railway induced ground vibration

Dijckmans

Ekblad

Smekal

et al. 2016

Soil Dynamics and Earthquake Engineering

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“…The track-soil-wall interaction problem is solved by means of a coupled FE-BE methodology [31]. The track and heavy masses are modelled by means of finite elements, while boundary elements on the soilstructure interfaces are used to model the layered soil domain.…”

Section: Methodsologymentioning

confidence: 99%

“…The track and heavy masses are modelled by means of finite elements, while boundary elements on the soilstructure interfaces are used to model the layered soil domain. A weak variational formulation of the equilibrium of the track (structure j = 1) and the wall (structure j = 2) results in the following set of coupled FE-BE equations [31]:…”

Section: Methodsologymentioning

confidence: 99%

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Mitigation of railway induced ground vibration by heavy masses next to the track

Dijckmans

Coulier

Jiang

et al. 2015

Soil Dynamics and Earthquake Engineering

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The effectiveness of heavy masses next to the track as a measure for the reduction of railway induced ground vibration is investigated by means of numerical simulations. It is assumed that the heavy masses are placed in a continuous row along the track forming a wall. Such a continuous wall could be built as a gabion wall and also used as a noise barrier. Since the performance of mitigation measures on the transmission path strongly depends on local ground conditions, a parametric study is performed for a range of possible designs in a set of different ground types. A two-and-a-half dimensional coupled finite element -boundary element methodology is used, assuming that the geometry of the problem is uniform in the direction along the track. It is found that the heavy masses start to be effective above the mass-spring resonance frequency which is determined by the dynamic stiffness of the soil and the mass of the wall. At frequencies above this resonance frequency, masses at the soil's surface hinder the propagation of surface waves. It is therefore beneficial to make the footprint of the masses as large and stiff as possible. For homogeneous soil conditions, the effectiveness is nearly independent of the distance behind the wall. In the case of a layered soil with a soft top layer, the vibration reduction strongly decreases with increasing distance from the wall.

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“…The 2.5D models can be applied for longitudinally invariant structures, obtaining the 3D solution by numerical discretization of the cross-section combined with the Fourier transformation of the domain along the orthogonal direction. In addition to these three last researches, similar models have also been applied for the study of several railway lines both in surface and in tunnels [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Degradation of Shear Modulus of Soil on Predicted Railway Vibrations in Tunnels Excavated With Tbm: A Numerical Analysis

Ruiz¹,

Costa²,

Lopes³

et al. 2015

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Abstract. In this paper the influence of the stress state within the soil on predicted railway vibrations in tunnels is studied, regarding Gs modulus degradation that occurs when the tunnel is excavated with Tunnel Boring Machine (TBM). The adopted procedure is uncoupled, using a 2D FEM model to simulate the process of tunnelling which incorporates the constitutive model known as Hardening Soil with small strain stiffness (HS-small

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A 2.5D coupled FE–BE methodology for the dynamic interaction between longitudinally invariant structures and a layered halfspace

Cited by 191 publications

References 23 publications

Efficacy of a sheet pile wall as a wave barrier for railway induced ground vibration

Efficacy of a sheet pile wall as a wave barrier for railway induced ground vibration

Mitigation of railway induced ground vibration by heavy masses next to the track

The Influence of Degradation of Shear Modulus of Soil on Predicted Railway Vibrations in Tunnels Excavated With Tbm: A Numerical Analysis

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