Determination of the optimal span length to minimize resonance effects in bridges on high-speed lines

Cho, Jeong-Rae; Jung, Kwang‐Ik; Cho, Keunhee; Kwark, Jong-Won; Kim, Young Jin; Kim, Byung-Suk

doi:10.1177/0954409714542140

Cited by 10 publications

(10 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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. These simplifications, consistent with common design practices, have also been adopted in prior investigations of the resonance and cancellation phenomena in railway bridges [6,11,16,17], and it has been considered convenient in a first approach to the problem. Additionally, as it will be shown in what follows, vehiclebridge interaction and SSI will both lead to a reduction of the deck acceleration at resonance.…”

Section: Approach Of the Investigationmentioning

confidence: 99%

“…The phenomena of resonance and cancellation experienced by beams or bridges under the circulation of moving loads has been studied by several researchers [6,[10][11][12][13][14][15][16][17]. Nevertheless in the previous works, soil-structure interaction is always disregarded and classical boundary conditions are assumed for the bridge deck.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

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.

show abstract

Section: Approach Of the Investigationmentioning

confidence: 99%

Section: Introductionmentioning

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

View full text Add to dashboard Cite

show abstract

“…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. These simplifications, in line with common design practices, have also been adopted in prior investigations of the resonance and cancellation phenomena in railway bridges [11,13,17,18], and it has been considered convenient in a first approach to the problem.…”

Section: Introductionmentioning

confidence: 95%

“…In [17] the cancellation phenomenon is addressed considering heavily damped beams. Finally in [18] the authors investigate resonance and cancellation conditions in beams with different boundary conditions, and optimal span lengths for the supression of resonance are presented.…”

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

View full text Add to dashboard Cite

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.

show abstract

“…He concluded that the resonant speed reduces with the flexibility of the supports, but the cancellation velocity is not much affected. Other recent studies on the resonance and cancellation mechanisms on simply and elastically supported beams may be found in [12,13,14]. Generally speaking, the free vibration levels of beams or bridges under moving loads, and their effect on the amplification or cancellation of resonance have been evaluated in the past considering simple models for the bridge structure: generally SS beams, ES beams, and SS or ES plates [15,16], when the contribution of three-dimensional deformation modes of the deck needs to be considered.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effect of Soil-Structure Interaction on the Response of Railway Bridges using Boundary Element - Finite Element Methods

Monforte¹,

Rodrigo²,

Galvín³

et al.

Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance

View full text Add to dashboard Cite

The dynamic behaviour of short simply-supported railway bridges under convoy circulations and, especially, the effect of soil structure interaction (SSI) in the maximum expectable deck transverse response is the aim of this study. These structures due to their usually light weight may experience excessively high acceleration levels under resonant conditions. In order to approach this wave propagation problem, a coupled three-dimensional Boundary Element-Finite Element model formulated in the time domain is used to reproduce the soil and structural behaviour, respectively. As the resonant phenomenon in this application is highly influenced by the free vibration response of the deck, a sensitivity analysis is designed in order to first analyse how SSI affects the free vibration response of beams under the circulation of a single moving load in a wide range of velocities. A subset of beam bridges is defined considering span lengths ranging from 12.5 to 25 m, and fundamental frequencies covering associated typologies. A single soil layer is considered with shear wave velocities ranging from 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 response. These conclusions are used afterwards to justify how resonant amplitudes of the bridge under the circulation of railway convoys are affected by the soil properties, leading to substantially amplified responses or to almost cancelled ones, and numerical examples are included to show the aforementioned situations.

show abstract

Determination of the optimal span length to minimize resonance effects in bridges on high-speed lines

Cited by 10 publications

References 17 publications

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

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

Analysis of the Effect of Soil-Structure Interaction on the Response of Railway Bridges using Boundary Element - Finite Element Methods

Contact Info

Product

Resources

About