Amplification of Vibrations in High-Speed Railway Embankments by Passive Ground Vibration Barriers

Khan, M. Roshan; Dasaka, Satyanarayana Murty

doi:10.1007/s40891-020-00217-y

Cited by 4 publications

(2 citation statements)

References 35 publications

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“…Hence, for estimating the vibration transmission characteristics of the soil at different frequencies, the linear elastic constitutive model was reasonably adopted for the soil. Infinite elements [38,39] were employed at the domain edges to prevent unwanted reflection of waves, as shown in Fig. 10.…”

Section: T R =mentioning

confidence: 99%

Impact of Footing Shape on Dynamic Properties and Vibration Transmission Characteristics of Machine Foundations

Surapreddi

Ghosh

2021

Int. J. of Geosynth. and Ground Eng.

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Due to immense infrastructure development activities, a study on the vibration generated by heavy machinery, construction activities, highway and railway traffic movements has gained importance in recent years. The present study investigates the influence of shape on the system and vibration transmission characteristics of block machine foundations under dynamic loading. A series of block vibration tests were conducted on model foundations laid on the local soil available at IIT Kanpur, India, to evaluate the system characteristics of machine foundations. The vibration transmission characteristics of the foundations were investigated using a 3D finite element (FE) analysis. Three different shapes of foundation (circular, square, and rectangular) were considered for the intended purpose. The effect of the loading intensity on various parameters such as natural frequency, soil stiffness, and damping coefficient was investigated. In addition, the shape effect of foundations on the dynamic shear strain, shear modulus, and the elastic uniform compression coefficient was suitably assessed. The efficiency of a wave barrier in mitigating the machine-induced vibration was investigated. It can be observed that the shape of foundations significantly influences the system characteristics. The circular and square foundations perform better than the rectangular foundation at higher loads. In contrast, the vibration transmission characteristics of block foundations are unaffected by the shape of the foundations. The transmission ratio decreases with an increase in the frequency at the pick-up points located away from the vibration source. It can be noted that the absolute damping varies significantly in the presence of the wave barrier at higher frequencies.

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Section: T R =mentioning

confidence: 99%

Impact of Footing Shape on Dynamic Properties and Vibration Transmission Characteristics of Machine Foundations

Surapreddi

Ghosh

2021

Int. J. of Geosynth. and Ground Eng.

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“…The dynamic transmission behavior of local sub-soil can be changed through a complex wave reflection and mode modification process by building a wave barrier using a wave impeding block [22]. Several works have been reported in the literature using geofoam as an infill material [15,19,[23][24][25][26]. Recently, the use of Crumb Rubber (CR) in the construction industry, such as highway construction, freeze and thaw-resistant concrete [27], has gained popularity.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Vibration Screening Using Geofoam and Sand–Crumb Rubber Mixture Infilled Trench

Sarkar

Barman

Bhowmik

2021

Int. J. of Geosynth. and Ground Eng.

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This study investigates the application of a composite layer of geofoam and sand-crumb rubber infilled trench (GSFT) as a wave barrier. Rubber is a waste material and its safe disposal is a matter of concern. A numerical investigation was carried out using a two-dimensional finite element method (FEM) in ABAQUS software. A machine foundation was considered as the source of vibration and the screening efficiency was evaluated by calculating the Amplitude Reduction Factor (A r ). The performance of the GSFT was evaluated by varying the loading frequency, location of the trench, trench geometry and the proportion of geofoam and sand-crumb rubber (SCR) mixture. The effect of slenderness ratio and cross-sectional area was found to be critical for trench design. The findings of this study were in good agreement with previous studies on Expanded polystyrene (EPS) geofoam infilled trench and SCR infilled trench. It was observed that GSFT performed similar to the EPS geofoam infilled trench and was better than SCR filled trench. Therefore, it is proposed that GSFT can be used as a potential alternative to the EPS geofoam wave barrier by not only cutting down the cost but also as an eco-friendly alternative.

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Impact of Train-Induced Vibrations on Residents’ Comfort and Structural Damages in Buildings

Seyedi

2024

J. Vib. Eng. Technol.

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The rapid growth of urbanization and the progress of industrialization have resulted in the construction of over or near-track buildings. Train-induced ground-borne vibrations have attracted attention because they can damage buildings and cause residents discomfort. This study conducted a series of finite element analyses on three 5-story concrete framed buildings, which were subjected to the passage of trains at various speeds. One of the buildings was modeled as an over-track building, whereas the other two buildings were located in close proximity to the track but at different distances. The present study investigated the impact of train speed and track-to-building distance on the acceleration and velocity responses of buildings. The comparison of residents’ comfort levels and the structural safety of buildings against potential damages was conducted using international standards as the controlling criteria. Furthermore, an efficient mitigation technique was implemented, involving the utilization of open trenches with different depths between buildings and the railway track. This approach was employed with the aim of minimizing the detrimental impacts caused by trains-induced vibrations. The findings indicated that the over-track building was impacted by the train-induced vibrations more than near-track buildings. Furthermore, it was shown that although the passage of high-speed trains can disturb the comfort of building residents and potentially cause some structural damage to buildings, it did not lead to any significant story drifts in the structures. Finally, the minimum required depth of open trenches to mitigate train-induced vibrations was computed for every type of buildings and train speeds.

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Amplification of Vibrations in High-Speed Railway Embankments by Passive Ground Vibration Barriers

Cited by 4 publications

References 35 publications

Impact of Footing Shape on Dynamic Properties and Vibration Transmission Characteristics of Machine Foundations

Impact of Footing Shape on Dynamic Properties and Vibration Transmission Characteristics of Machine Foundations

Numerical Investigation on Vibration Screening Using Geofoam and Sand–Crumb Rubber Mixture Infilled Trench

Impact of Train-Induced Vibrations on Residents’ Comfort and Structural Damages in Buildings

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