Influence of ballast models in the dynamic response of railway viaducts

Rigueiro, Constança; Rebelo, Carlos; Silva, Luís Simões da

doi:10.1016/j.jsv.2010.02.002

Cited by 59 publications

(41 citation statements)

References 9 publications

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“…However, between 10 and 10.5 s the number of periods was 7.5 which gives a lower eigenfrequency of 15 Hz. Obviously the system stiffness decreases with higher amplitudes-a behaviour which was also observed in [4] and which can be explained by a Fig. 8.…”

Section: Test Resultssupporting

confidence: 60%

“…The investigations have been performed against the background that recent publications have discussed the important role played by the ballast in terms of stiffness/damping contribution and coupling effects [3,4]. Within their publications the authors compare results from field measurements with results from numerical analysis and come to the conclusion that nonlinear behaviour of the ballast with regard to stiffness and damping should be taken into consideration within dynamic analysis of ballasted railway bridges.…”

Section: Introduction and General Approachmentioning

confidence: 99%

See 1 more Smart Citation

On the prediction of the interaction effect caused by continuous ballast on filler beam railway bridges by experimentally supported numerical studies

Rauert

Bigelow

Hoffmeister

et al. 2010

Engineering Structures

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Section: Test Resultssupporting

confidence: 60%

Section: Introduction and General Approachmentioning

confidence: 99%

On the prediction of the interaction effect caused by continuous ballast on filler beam railway bridges by experimentally supported numerical studies

Rauert

Bigelow

Hoffmeister

et al. 2010

Engineering Structures

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“…• The influence of the track and the ballast, which can also affect the dynamic behaviour of the bridge [28][29][30][31][32], has been taken into account only by means of the associated dead masses. A detailed vehicle idealisation, that would cause a reduction in the vibration levels of the bridge [33,34] at resonance and of the ground [35], is also disregarded, and a moving load model has been used during the investigation.…”

Section: Approach Of the Investigationmentioning

confidence: 99%

Effect of soil properties on the dynamic response of simply-supported bridges under railway traffic through coupled boundary element-finite element analyses

Martínez-Rodrigo

Galvín

Doménech

et al. 2018

Engineering Structures

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Railway induced vibrations on short-to-medium span simply-supported (SS) bridges is addressed in this contribution. Such structures may experience high levels of vertical acceleration at the platform, leading to adverse consequences such as a premature degradation of the ballast layer and passenger discomfort. In the present study, the evolution of the bridge dynamic response when soil-structure interaction (SSI) is taken into account is investigated. To this end a coupled three-dimensional (3D) Boundary Element-Finite Element model (BEM-FEM) formulated in the time domain is implemented to reproduce the soil and structural behaviour, respectively. First, a set of soil-bridge systems of interest is defined, covering a wide range of lengths and natural frequencies for the structures, and an interval of expectable elastic properties and damping levels for the soil. Then, different types of analyses are performed on the soil-bridge systems extracting conclusions regarding the effect of including SSI in numerical models for predicting the bridge behaviour under railway traffic. In particular natural frequencies and modal damping levels are identified, and the structure amplification after the passage of a moving load in free vibration is investigated. Conclusions regarding how resonance and cancellation conditions may be affected by soil properties are extracted. Finally, the dynamic response of a real bridge, belonging to the Spanish railway network, is evaluated under the circulation of trains that induce second and third resonances of the bridge fundamental mode. The effect of the soil flexibility, soil material damping and the bridge resonance order are evaluated. Conclusions regarding the appropriateness of the results provided by common models which do not include SSI effects are extracted.

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“…• The influence of the track and the ballast, which can also affect the dynamic behaviour of the bridge [28][29][30][31][32], has been taken into account only by means of its associated dead mass. A detailed vehicle idealisation, that would cause a reduction in the vibration levels of the bridge [33,34] and the ground [35], is also disregarded, and a moving load model has been used during the investigation.…”

Section: Introductionmentioning

confidence: 99%

On the basic phenomenon of soil-structure interaction on the free vibration response of beams: Application to railway bridges

Doménech

Martínez-Rodrigo

Romero

et al. 2016

Engineering Structures

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The dynamic transverse response of beam type bridges under railway traffic is addressed in this contribution. In particular, how soil-structure interaction may affect the critical or resonant speeds and the associated vibratory amplitudes is evaluated in detail. Resonance in beams, due to the circulation of equidistant loads, is highly influenced by the free vibration response that every single load leaves after traversing the structure. On this basis a numerical investigation is carried out analysing the effects of the wave propagation problem on the free vibration response of simply-supported beams in a wide range of travelling speeds. To this end a coupled three-dimensional boundary element-finite element model formulated in the time domain is used to reproduce the soil and structural behaviour, respectively. A catalogue of bridge deck typologies is defined, covering lengths, associated linear masses and fundamental frequencies that may experience high levels of transverse accelerations under resonant conditions, for nowadays existing trains and design speeds. Lengths ranging from 12.5 to 25 m are evaluated, along with fundamental frequencies covering most common typologies. A homogeneous soil is considered with shear wave speeds in the interval 150 to 365 m/s. From the single load free vibration parametric analysis conclusions are derived regarding the conditions of maximum free vibration and cancellation of the deck response. These conclusions are used afterwards to justify how resonant amplitudes of the bridge under the circulation of railway convoys may be affected by the soil properties, leading to substantially amplified responses or to almost imperceptible ones, and a numerical example is included to show the aforementioned situations.

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Influence of ballast models in the dynamic response of railway viaducts

Cited by 59 publications

References 9 publications

On the prediction of the interaction effect caused by continuous ballast on filler beam railway bridges by experimentally supported numerical studies

On the prediction of the interaction effect caused by continuous ballast on filler beam railway bridges by experimentally supported numerical studies

Effect of soil properties on the dynamic response of simply-supported bridges under railway traffic through coupled boundary element-finite element analyses

On the basic phenomenon of soil-structure interaction on the free vibration response of beams: Application to railway bridges

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