Effect of soil stiffness in the attenuation of Rayleigh-wave motions from field measurements

Athanasopoulos, George; Pelekis, Panagiotis; Anagnostopoulos, George

doi:10.1016/s0267-7261(00)00009-9

Cited by 59 publications

(31 citation statements)

References 3 publications

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“…Primary and secondary suspensions are defined with the help of spring and dashpot elements in parallel: (k 1 , d 1 ) for the wheel set/bogie connection, and (k 2 , d 2 ) for the car body/bogie connection. The equations of motion are derived using virtual power principles and are included in the track/foundation model using Equation (9). The corresponding degrees of freedom are 30 for a 3-carriage train set.…”

Section: Free-field Ground Vibration Resultsmentioning

confidence: 99%

“…According to Hertz's theory, it can be calculated using Equation (9) by considering small variations d around the nominal value d 0…”

Section: Comparison Between Linear and Nonlinear Wheel/rail Contact Mmentioning

confidence: 99%

“…[9,10] Furthermore, their modelling is challenging due to the natural uncertainties in soil properties. Similarly, track configuration (embankment condition) affects the soil response.…”

Section: Introductionmentioning

confidence: 99%

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Railway ground vibrations induced by wheel and rail singular defects

Kouroussis

Connolly

Alexandrou

et al. 2015

Vehicle System Dynamics

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Railway local irregularities are a growing source of ground-borne vibration and can cause negative environmental impacts, particularly in urban areas. Therefore, this paper analyses the effect of railway track singular defects (discontinuities) on ground vibration generation and propagation. A vehicle/track/soil numerical railway model is presented, capable of accurately predicting vibration levels. The prediction model is composed of a multibody vehicle model, a flexible track model and a finite/infinite element soil model. Firstly, analysis is undertaken to assess the ability of wheel/rail contact models to accurately simulate the force generation at the wheel/rail contact, in the presence of a singular defect. It is found that, although linear contact models are sufficient for modelling ground vibration on smooth tracks, when singular defects are present higher accuracy wheel/rail models are required. Furthermore, it is found that the variation in wheel/rail force during the singular defect contact depends on the track flexibility, and thus requires a fully coupled vehicle/track/foundation model. Next, a parametric study of ground vibrations generated by singular rail and wheel defects is undertaken. Six shapes of discontinuity are modelled, representing various defect types such as transition zones, switches, crossings, rail joints and wheel flats. The vehicle is modelled as an AM96 train set and it is found that ground vibration levels are highly sensitive to defect height, length and shape.

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Section: Free-field Ground Vibration Resultsmentioning

confidence: 99%

“…According to Hertz's theory, it can be calculated using Equation (9) by considering small variations d around the nominal value d 0…”

Section: Comparison Between Linear and Nonlinear Wheel/rail Contact Mmentioning

confidence: 99%

See 1 more Smart Citation

Railway ground vibrations induced by wheel and rail singular defects

Kouroussis

Connolly

Alexandrou

et al. 2015

Vehicle System Dynamics

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“…In the case of a homogeneous elastic soil, stiffness has mostly been investigated (see e.g. [3]): the effect of the shear modulus on the surface particles motion is often examined. The other dynamic parameters usually have a smaller influence on ground vibrations.…”

Section: Introductionmentioning

confidence: 99%

Investigating the influence of soil properties on railway traffic vibration using a numerical model

Kouroussis

Conti

Verlinden

2013

Vehicle System Dynamics

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This paper presents the influence of dynamic and geometrical soil parameters on the propagation of ground vibrations induced by external loads. The proposed approach is based on a three-dimensional model, focusing on realistic excitation sources like impulse loads and moving railway vehicles. For the latter, a complete vehicle/track model is developed. The simulation is performed in time domain, offering an interesting approach, compared with classic cyclic analyses. The ground is modelled initially as an elastic homogeneous half-space and additionally as a layered half-space. First, the effect of homogeneous soil properties on ground vibration is analysed. Soil stratification is then taken into account, using various configurations. Analysis reveals that as receiver distance increases ground wave reflection in a layered ground plays an important role in the reduction of ground surface motion. This effect is magnified when the phase velocity wavelength becomes large compared with the depth of the surface layer.

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“…The second concerns the possibility of using passive seismic measurements to characterize the anelastic properties of the subsoil. In general, measuring the damping of subsoil materials in situ is not an easy task (Tonn 1989; Athanasopoulos et al 2000; Rix et al 2000; Lai et al 2002; Xia et al 2002), and this explains why such estimates are not very common in current practice, despite their importance in seismic engineering. Thus, the possibility of using surface noise measurements to this end is very appealing.…”

Section: Introductionmentioning

confidence: 99%

On the seismic noise wavefield in a weakly dissipative layered Earth

Lunedei

Albarello

2009

Geophysical Journal International

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S U M M A R YProceeding on the assumption that the seismic noise wavefield mainly consists of surface waves generated by a random distribution of independent, point-like and harmonic sources, we modelled a set of relationships that allows us to interpret empirical H/V and apparent dispersion curves in terms of the dynamic properties of a viscoelastic layered Earth. This formalization can be used to determine the effect of material damping on the expected noise wavefield in cases where the sources are relatively distant from the receivers and where the frequencies taken into account are higher than the fundamental resonance frequency of the local subsoil. Numerical experiments indicate that such effects are significant on the H/V ratio curve, whereas the apparent dispersion curve appears to be less strongly influenced by damping. This finding opens new perspectives for the use of noise measurements to infer the in situ anelastic properties of subsoil from passive seismic measurements made at the surface.

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Effect of soil stiffness in the attenuation of Rayleigh-wave motions from field measurements

Cited by 59 publications

References 3 publications

Railway ground vibrations induced by wheel and rail singular defects

Railway ground vibrations induced by wheel and rail singular defects

Investigating the influence of soil properties on railway traffic vibration using a numerical model

On the seismic noise wavefield in a weakly dissipative layered Earth

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