Prediction Model for Low Frequency Vibration From High Speed Railways on Soft Ground

Madshus, C.; Bessason, Bjarni; Harvik, L.

doi:10.1006/jsvi.1996.0259

Cited by 98 publications

(52 citation statements)

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“…As expected, we can see that the increase of the dynamic load with train speed affects the embankment vibration, so that a slightly higher intensities were obtained for increasing train speed. Madshus et al [18] had pointed out that the ground vibration will increase significantly as train speed exceeding the site Rayleigh wave velocity. Despite it was difficult for the designed speed of heavy haul railway to reach this critical value, according to the measured data during this field test, obviously the effect of train speed on the subgrade vibration should not be ignored.…”

Section: Train Typementioning

confidence: 99%

“…As well known, a moving train radiates vibrations as both body and surface waves in various directions, of which the Rayleigh surface wave carries most of the energy due to different geometric attenuation [17]. For the tracks on soft soil, Madshus et al [18] had experimentally observed that as a train traveled faster than the Rayleigh wave speed in the ground, very large increase in ground vibration amplitudes was aroused, which severely exacerbated the running conditions. Although this phenomenon was not yet common in majority of the practical running cases, the rapid extension of high speed railway all over the world still initiated a lot of investigations mainly on the influence of train speed on the vibration characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Field Testing and Analysis of Embankment Vibrations Induced by Heavy Haul Trains

Ling

Zhang

et al. 2017

Shock and Vibration

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This paper presents a field testing of track and ground-borne vibration generated by heavy haul trains. The test sites consisted of three embankments with height of 6.6, 8.1, and 11.9, respectively. The acceleration signals of the rail, sleeper, and embankment surface were recorded, and then the propagation characteristics of ground vibration with distance to track center were contrastively analyzed. The test results show that horizontal vibration was dominant for locations near the track but decreased rapidly and became comparable with the vertical levels as the distance from track center increases. The quasi-static excitation dominated the sleeper response, and the dominant frequency range was found in the low-frequency zone corresponding to the fundamental axle passage frequency. For embankment surface, another pronounced dominant frequency zone was observed between 30 and 80 Hz, which was attributed to the dynamic excitation. Moreover, these higher frequency components were more promptly attenuated than lowfrequency ones. The reason that vibration levels generated by locomotive were greater than wagon was attributed to the different bogie suspension mode. The relationship between normalized PPV and distance from track center in doubly logarithmic scales can be expressed with exponential function, and the vibration attenuation rates were restrained with increasing the embankment height.

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Section: Train Typementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Field Testing and Analysis of Embankment Vibrations Induced by Heavy Haul Trains

Ling

Zhang

et al. 2017

Shock and Vibration

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“…Therefore, the dynamic behaviors of cantilever mast structure and its monitoring system are needed to take into account during train operation and the occurrence of extreme environmental events. Although the effects of ground borne vibration generated by passing train on cantilever mast have been studied (Kurzeil, 1979;Madshus et al, 1996;Jonsson, 2000;Kouroussis et al, 2013Kouroussis et al, , 2014Kouroussis et al, , 2015Vogiatzis and Mouzakis, 2017), the effects of earthquake have not been introduced.…”

Section: Introductionmentioning

confidence: 99%

Far-Field Earthquake Responses of Overhead Line Equipment (OHLE) Structure Considering Soil-Structure Interaction

Ngamkhanong¹,

Kaewunruen²,

Baniotopoulos³

2018

Front. Built Environ.

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Overhead line equipment (OHLE) is the components for the electric train which supply the electric power to the train. For one or two tracks, OHLE is normally supported by cantilever mast. The cantilever mast, which is made of H-section steel, is slender and has a poor dynamic behavior by nature. Nonetheless, the mast structures, which located alongside the railway track, have not been fully studied on the dynamic behavior. This paper presents the effects of far-field excitations on cantilever mast and overhead contact wire. The five far-field earthquake records at various magnitudes between 6.5 and 8 Mw are considered. A three-dimensional mast structure with varying support stiffness is made using finite element modeling. It is interesting that support stiffness plays a role in the dynamic responses of OHLE during far-field earthquakes due to the change of its properties. Surprisingly, the earthquakes can cause damage to the overhead contact wire which lead to the failure of electric system. In this case, the train cannot run until the broken wire and electric system is cleared. This occurs when there are the losses of support stiffness due to the failure of support connection or soil degradation. Moreover, beating phenomenon, which normally occurs in the tall building, is obviously observed in OHLE during the occurrence of earthquake. This is the world first to demonstrate the effects of far-field earthquakes on the cantilever mast structure and the response of OHLE. The insight in this earthquake response of OHLE and its support has raised the awareness of engineers for better design of cantilever mast structure and its support condition. The outcome of this study will provide a new earthquake detection method using OHLE.

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“…Results of studies conducted in different countries published in (e.g. [1][2][3]) are not always comparable because of differences in the structures of trains and surface rail, the differences in soil conditions, and finally due to local differences of the buildings' construction receiving the vibration. Therefore, also in Poland, after purchasing the Pendolino trains, it was decided that test drives need to be performed within the test framework of vibration generated by the passing train (Fig.…”

Section: Introductionmentioning

confidence: 99%

Vibrations of free-field and building caused by passages of the Pendolino train

Stypuła¹,

Tatara²

2017

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The objective of the paper was to conduct dynamic measurements of free-field vibrations in three profiles and establish decay relations of propagating vibrations. The sources of vibrations were passages of the Pendolino train with dedicated speeds from 40 to 293 km/h. In each profile, soil properties tests were carried out. Based on the data for a few selected speeds of the Pendolino train' s passages, the Vibration Reduction Coefficients (VRC) were determined at selected points. The paper is also focused on the analysis of vibrations of the selected one-storey masonry residential building located in the vicinity of one of the profiles and their evaluation of the harmfulness on the building structure using standard scales of dynamic influence.Keywords: free-field vibrations, dynamic investigation, speed of passage of a train, building vibrations, harmfulness of vibrations Streszczenie W pracy przedstawiono wyniki analiz pomiarów drgań gruntu w trzech profilach oraz podano zależności tłumienia propagujących się w gruncie drgań, których źródłem były przejazdy pociągu Pendolino z dedykowanymi prędkościami 40-293 km/h. W każdym profilu określono właściwości gruntu. Na podstawie danych pomiarowych wyznaczono współczynniki redukcji drgań w wybranych punktach. W pracy przedstawiono także wyniki analiz pomierzonych drgań murowego, jednopiętrowego budynku mieszkalnego zlokalizowanego w sąsiedztwie jednego z profili pomiarowych prowadzonych pod kątem oceny ich szkodliwości na konstrukcję budynku. W ocenach wykorzystano normowe Skale Wpływów Dynamicznych.Słowa kluczowe: wstrząsy górnicze, przekazywanie drgań z gruntu na fundament budynku, transmisja spektrów odpowiedzi 86

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Prediction Model for Low Frequency Vibration From High Speed Railways on Soft Ground

Cited by 98 publications

References 0 publications

Field Testing and Analysis of Embankment Vibrations Induced by Heavy Haul Trains

Field Testing and Analysis of Embankment Vibrations Induced by Heavy Haul Trains

Far-Field Earthquake Responses of Overhead Line Equipment (OHLE) Structure Considering Soil-Structure Interaction

Vibrations of free-field and building caused by passages of the Pendolino train

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