A 2.5D coupled FEM–SBM methodology for soil–structure dynamic interaction problems

Liravi, Hassan; Villamarín, Robert Arcos; Clot, Arnau; Conto, Kenny F.; Garbí, Jordi Romeu

doi:10.1016/j.engstruct.2021.113371

Cited by 16 publications

(19 citation statements)

References 41 publications

(60 reference statements)

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“…The aim of this paper is to present the application of the 2.5D FEM-SBM methodology presented in [9] to several calculation examples that are of interest in the type of railway-induced groundborne vibration problems that VIBWAY prediction tool aims to address. The calculation examples considered in this work are:…”

Section: Description Of the Calculation Examplesmentioning

confidence: 99%

“…For the sake of brevity, the proposed methodology will be only briefly outlined here but the interested reader can find more detailed explanations in [9]. On the one hand, the FEM is used to model the tunnel structure.…”

Section: Description Of the Calculation Examplesmentioning

confidence: 99%

“…The receptanes are computed at x = 0, being x the direction along which the system is invariant. As detailed in [9], the receptance is computed from the response of the system in the wavenumber-frequency domain.…”

Section: Description Of the Calculation Examplesmentioning

confidence: 99%

“…These discrepancies can be again attributed to the number of collocation points used, as it is expected that, when the number of nodes per wavelength is reduced, the accuracy of the FEM-SBM method decays faster than that of the FEM-BEM method. A more detailed study of these decays can be found in [9].…”

Section: Example 2: Circular Tunnels Embedded In a Homogeneous Half-s...mentioning

confidence: 99%

“…In order to simplify the use of the tool, the FEM mesh of the tunnel structure is generated using the Delaunay-based mesh generation algorithm presented [8]. The 2.5D SBM approach implemented in the tool is based on the formulation presented in [9]. The proposed methodology has been applied to three different calculation examples: two of them consider a circular tunnel and the other a cut-and-cover tunnel.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A 2.5D automatic FEM-SBM method for the evaluation of free-field vibrations induced by underground railway infrastructures

2023

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This paper presents an efficient method to predict underground railway-induced vibrations. The method uses the finite element method (FEM) to model the railway tunnel structure and the singular boundary method (SBM) to model the wave propagation in the surrounding soil. The FEM mesh and the distribution of SBM collocation points at the tunnel/soil interface are generated using an automatic meshing strategy. The presented method is one of the main components of VIBWAY, a user-friendly prediction tool to address railway-induced vibration problems. This paper presents three calculation examples in which the soil response due to forces applied on the tunnel structure are computed in terms of transfer functions. The results obtained for each one of the calculation examples are compared with those computed using a model based on a 2.5D FEM-BEM approach. The presented comparisons show that the proposed approach is a suitable strategy for predicting underground railway-induced vibrations, both in terms of accuracy and computational efficiency. Moreover, the use of an automatic meshing strategy and the SBM formulation not only eases the implementation of the approach but it also makes it easier to use, which is one of the key features of the VIBWAY tool.

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Section: Description Of the Calculation Examplesmentioning

confidence: 99%

Section: Description Of the Calculation Examplesmentioning

confidence: 99%

Section: Description Of the Calculation Examplesmentioning

confidence: 99%

Section: Example 2: Circular Tunnels Embedded In a Homogeneous Half-s...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A 2.5D automatic FEM-SBM method for the evaluation of free-field vibrations induced by underground railway infrastructures

2023

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Identification of line-source transfer mobility and force density by ground acceleration measurements

Tao

Wang

et al. 2023

Environ Sci Pollut Res

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Ground-borne vibration caused by railway traffic has been a research concern due to its possible side effects on nearby residences. The force density and line-source mobility can effectively characterize the generation and transmission of train-induced vibrations, respectively. This research proposed a frequencydomain method for identifying the line-source mobility and force density using measured vibrations at the ground surface. It was achieved by minimizing the difference of force densities formulated using measurements at two different locations, in which the genetic algorithm was adopted for solving the optimization problem. The proposed method was later applied to and validated by a case study at Shenzhen Metro in China, where a total of seven fixed-point hammer impacts with 3.3 m equal intervals were used to represent the vibration excitation from one vehicle. The fixed-point loads' assumption was validated by comparing the identifications with the predictions based on the train-track coupled dynamic model and theoretical derivation. Causes for different dominant frequencies can be traced by separating the dynamic characteristics of vibration excitation and transmission. It was found in the case study that at a location 3 m away from the track, the peak at 50 Hz was caused by excitations, while that at 63 Hz was attributed to transmission efficiency related to the soil properties. Finally, the identified line-source transfer mobility and force density levels were applied to the forward problem of making predictions. The predicted ground vibrations at different locations were compared to field measurements, with good agreement, which experimentally validated the identification method. The identification results of the case study can be employed by similar railway systems as a good reference.

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Underwater noise prediction and control of a cross-river subway tunnel: an experimental and numerical study

Song,

Yin,

Xiong

et al. 2023

Int. J. Environ. Sci. Technol.

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A 2.5D coupled FEM–SBM methodology for soil–structure dynamic interaction problems

Cited by 16 publications

References 41 publications

A 2.5D automatic FEM-SBM method for the evaluation of free-field vibrations induced by underground railway infrastructures

A 2.5D automatic FEM-SBM method for the evaluation of free-field vibrations induced by underground railway infrastructures

Identification of line-source transfer mobility and force density by ground acceleration measurements

Underwater noise prediction and control of a cross-river subway tunnel: an experimental and numerical study

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