Vibration mitigation performance of embankments and cuttings in transversely isotropic ground under high-speed train loading

Gao, Guanghai; Bi, Junwei; Chen, Juan

doi:10.1016/j.soildyn.2020.106478

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…Under the vibration load of the train, the elastic modulus of the structure is generally high, and the deformation generated is low [27]. The elastic modulus of the surround-ing soil was relatively low, and its plastic characteristics need to be considered in the numerical calculation process.…”

Section: Numerical Simulation 231 Overview Of the Numerical Calculati...mentioning

confidence: 99%

Dynamic Response of Bridge–Tunnel Overlapping Structures under High-Speed Railway and Subway Train Loads

Xu,

Zhu

et al. 2024

Sustainability

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With the rapid development of high-speed railroads and subways, there has been an increasing number of bridge–tunnel overlapping structures. To study the dynamic response characteristics of bridge–tunnel structures under the synergistic effects of the vibration generated by high-speed railway and subway trains, the dynamic response characteristics of a bridge–tunnel structure under single-point vibration loading was analyzed by conducting numerical simulations and model tests, with the frequency response function and peak acceleration as the evaluation indices. The dynamic response characteristics of the overlapping structure under moving vibration loads of the high-speed railway and subway trains were further analyzed. The results showed that the dynamic response of the bridge–tunnel overlapping structure increased with the increase in the frequency under the full frequency domain single-point sweep vibration load. The dynamic response of the tunnel hance near the pile foundation side was significantly greater than the vault and invert. Compared with the effect of high-speed train loads alone, the dynamic response of the bridge–tunnel overlapping structure under the synergistic effects of high-speed railways and subways increased significantly and varied at different locations. This investigation provides theoretical support for the design and construction of bridge–tunnel overlapping structures under the synergistic effects of high-speed railways and subways, contributing to improving engineering quality and safety.

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Section: Numerical Simulation 231 Overview Of the Numerical Calculati...mentioning

confidence: 99%

Dynamic Response of Bridge–Tunnel Overlapping Structures under High-Speed Railway and Subway Train Loads

Xu,

Zhu

et al. 2024

Sustainability

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“…The growth of researchers' knowledge on numerical and analytical methodologies in recent years has contributed to the accurate prediction of the response of railway tracks and the subsoil's surface when subjected to HST-induced vibrations. Relevant investigations focus on wave propagation and surface vibrations [7] as well as on mitigation measures [8,9].…”

Section: Introductionmentioning

confidence: 99%

Protection of Buried Pipelines from High-Speed Train Vibrations with Expanded Polystyrene Geofoam

Lyratzakis,

Tsompanakis,

Psarropoulos

2024

Applied Sciences

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High-speed railway (HSR) lines commonly operate over hundreds of kilometers, crossing several other large-scale infrastructures, such as highways, tunnels, bridges, and pipelines. This fact makes adjacent infrastructure more vulnerable to high-speed train (HST)-induced vibrations; thus, their potential distress should be carefully examined. The current study aims to assess the level of traffic-induced vibrations on the surface of buried pipelines vertically crossing under an HSR line. Firstly, the necessity to reduce high vibration levels is highlighted, utilizing a three-dimensional (3D) finite element model in conjunction with the moving load approach. Subsequently, an efficient mitigation measure is proposed to minimize these vibrations. For this purpose, a low-weight, high-performance geosynthetic fill material, i.e., expanded polystyrene (EPS) geofoam blocks, has been implemented between the HSR line and the buried pipeline to minimize the impact of vibrations. In this manner, HST-induced vibrations are reflected on EPS blocks, preventing them from reaching the pipeline surface. Based on this detailed parametric study, useful conclusions are drawn regarding the mechanical properties and geometry of the EPS protection layer.

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“…The long‐term sedimentation process results in the stratification and transverse isotropy (TI) of soils. Gao et al 29 . established different TI ground models to discuss the dynamics of a beam due to moving train loads.…”

Section: Introductionmentioning

confidence: 99%

“…The long-term sedimentation process results in the stratification and transverse isotropy (TI) of soils. Gao et al 29 established different TI ground models to discuss the dynamics of a beam due to moving train loads. Based on the layered soil model, the beam vibrations induced by moving loads were studied by Sheng et al 30 and Lombaert et al 31 Li and his coworkers 32,33 investigated the behaviors of Euler-Bernoulli and Timoshenko beams resting on layered TI foundations using the modified Vlasov foundation model.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of an infinite beam resting on layered transversely isotropic saturated media subjected to moving harmonic loads

Wang

et al. 2023

Num Anal Meth Geomechanics

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This paper investigates the dynamic behavior of an infinite beam on layered transversely isotropic (TI) poroelastic media due to moving harmonic loads. Based on the Euler-Bernoulli beam theory and Biot theory, the governing equations of the beam and the layered TI poroelastic media are established. By introducing the compatibility conditions at the beam-subgrade interface, the equivalent stiffness of the layered TI saturated media is derived via the extended precise integration method (PIM) in the wavenumber domain. By means of the inverse Fourier transform algorithm, the physical solutions for the beamsaturated soil system are obtained after introducing the equivalent stiffness.Then, the accuracy of the proposed method is verified. Several numerical examples are presented to discuss the influences of the moving speed, beam bending rigidity, stratification, and soil anisotropy on the dynamic behavior of beams.

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Vibration mitigation performance of embankments and cuttings in transversely isotropic ground under high-speed train loading

Cited by 8 publications

References 17 publications

Dynamic Response of Bridge–Tunnel Overlapping Structures under High-Speed Railway and Subway Train Loads

Dynamic Response of Bridge–Tunnel Overlapping Structures under High-Speed Railway and Subway Train Loads

Protection of Buried Pipelines from High-Speed Train Vibrations with Expanded Polystyrene Geofoam

Dynamic analysis of an infinite beam resting on layered transversely isotropic saturated media subjected to moving harmonic loads

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