Mitigation of Ground Vibrations from Freight Trains

Vanhonacker, Patrick; Masoumi, Hamid Reza Fard

doi:10.1002/9781119307761.ch30

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…The pylon serves as part of a network for electrified railway lines 32 and is made from concrete with its properties listed in Table 1. As discussed in Ref., 33 vibrations from freight trains in the low frequency band around

20 H z

are generated by wheel and track defects and show negligible attenuation with distance. Thus, there is a high probability of resonance with nearby structures and structural systems.…”

Section: Numerical Examplesmentioning

confidence: 95%

Vibrations of flexible pylons with time‐dependent mass attachments under ground induced motions

Manolis

Dadoulis

2021

Earthq Engng Struct Dyn

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This work examines how mass attachments that vary with time influence the motion of flexible pylons undergoing ground-induced vibrations. Specifically, an analytical solution is derived for a time-dependent, lumped mass attachment placed at the top of a cantilevered pylon undergoing time-harmonic longitudinal vibrations. At first, the solution to the governing equation of motion entails the recovery of the eigenvalue problem in the presence of a fixed mass. This is then followed by a generalization of this solution to allow for mass variability with time. It is noted that modal analysis no longer yields an uncoupled system of equations for the generalized coordinates, this necessitating a second step modal analysis, which is complicated by the fact that the system matrices are now time dependent. Results are presented in terms of time histories and frequency plots for the pylon displacement amplitude at the top, resulting from harmonic base motion of unit amplitude. The aim is to identify the frequency range over which the presence of a time-varying mass is either beneficial or detrimental in minimizing the pylon's kinematic response. Since the rate of change of the mass can be either positive or negative, the special cases of constant mass and of no mass can be recovered from the solution. Finally, this methodology can be generalized to include transverse and rotational vibrations of flexible pylons.

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20 H z

are generated by wheel and track defects and show negligible attenuation with distance. Thus, there is a high probability of resonance with nearby structures and structural systems.…”

Section: Numerical Examplesmentioning

confidence: 95%

Vibrations of flexible pylons with time‐dependent mass attachments under ground induced motions

Manolis

Dadoulis

2021

Earthq Engng Struct Dyn

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show abstract

“…The value of 1 and 2 have been solved above, and the same method can be used to find out the value of and 2 , 22 ⋅ ⋅ ⋅ 2 both have linear relationship with wagon speed, respectively; according to (18), it is expressed in the form as follows:…”

Section: Determination Of Site Coefficientmentioning

confidence: 99%

“…The coefficients 1 , 2 , and 1 , 2 were calculated by fitting 1 , 21 ⋅ ⋅ ⋅ 1 , 2 , 22 ⋅ ⋅ ⋅ 2 and wagon speed, respectively, and then we can obtain the functional expression of Q' by substituting them in (18). Setting Q' into (2), PPV of any surface point at different speed and wagon weight can be obtained.…”

Section: Determination Of Site Coefficientmentioning

confidence: 99%

“…For the propagation and attenuation law of ground vibration, many scholars have put forward different prediction formulas. They can be broadly classified into two categories: one is the amplitude representation and the other is the vibration level representation [17][18][19]. Among them, Bornitz [20] put forward the attenuation formula of ground vibration amplitude when disturbance force acts on the surface of half space of soil, considering the geometric attenuation of the vibration propagation and the medium absorption attenuation and the influence of propagation distance of the vibration.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Analysis and Prediction of Ground Vibrations Due to Heavy Haul Railway Viaduct

Luo

2019

Mathematical Problems in Engineering

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The ground vibration wave induced by the viaduct section of the heavy freight wagons is transformed into the ground vibration problem under the condition of point source excitation after it is transmitted to soil through pier. When the speed and axle load of wagon become larger and larger, the impact on the surrounding buildings will also increase. In this paper, the ground vibration around Shenshan Village in section of Shuo-Huang railway line is monitored and numerical analyzed; the 3D numerical model of the Bridge-Pier-Field-House system is established. The relationship between peak vibration velocity (PPV) and the distance to the pier caused by heavy freight wagons at different speeds and different type of wagons is analyzed. The power function relationship between the two when measuring line perpendicular to the centerline of railway is verified. Based on the modified Sodev’s equation, the relationship between PPV of ground points and wagon speed, axle load, and soil properties is proposed, and the value of every parameter in the formula is discussed in detail. The concept of energy index is put forward for the first time in the formula, and the relationship between energy index and wagon speed and wagon weight is analyzed by regression analysis. The accuracy of the calculation model and prediction formula is verified by comparing field test results; an analytical method is proposed to predict the ground vibration induced by viaduct.

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Ground vibration from freight railway: environmental impact and potential mitigation measure at propagation path

Sun

Jiang

et al. 2022

Environ Sci Pollut Res

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Mitigation of Ground Vibrations from Freight Trains

Cited by 4 publications

References 6 publications

Vibrations of flexible pylons with time‐dependent mass attachments under ground induced motions

Vibrations of flexible pylons with time‐dependent mass attachments under ground induced motions

Experimental and Numerical Analysis and Prediction of Ground Vibrations Due to Heavy Haul Railway Viaduct

Ground vibration from freight railway: environmental impact and potential mitigation measure at propagation path

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