Numerical Study on Dynamic Effects of Soil-Tunnel-Structure Interaction

Alielahi, Hamid; Feizi, Damoon

doi:10.1007/s40999-021-00642-8

Cited by 12 publications

(11 citation statements)

References 19 publications

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“…The stability of singular and twin tunnels has been studied in different kinds of soils [14][15][16][17][18] or rock masses [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

The Effect of GSI and mi on the Stability of 3D Twin Tunnel in Limestone

Zenah,

Görög

2024

Period. Polytech. Civil Eng.

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The Generalised Hoek-Brown (GHB) failure criterion is one of the most used criteria to study the behaviour of the rocks; affected parameters of the Hoek-Brown equation are Geological Strength Index (GSI), intact rock constant (mi), and Disturbance factor (D). GSI is one of the rock classification systems used to evaluate jointed rocks. In light of this equation, this paper studies the stability of unsupported twin tunnels in a weak rock by changing the mentioned parameters (GSI, mi) to find the relation between the stability and these parameters under different distances between the centres of the tunnels (L). The tunnels have a circular cross-section with a diameter (B), and they have been modelled in three dimensions using Rocscience software package (RS3). The results showed that the stability of the tunnels, which was represented by the strength reduction factor (SRF), increased as a result of increasing L/B or GSI in the studied range; for mi , the modelling results showed that the SRF value increased while mi value was increased.

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“…The stability of singular and twin tunnels has been studied in different kinds of soils [14][15][16][17][18] or rock masses [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

The Effect of GSI and mi on the Stability of 3D Twin Tunnel in Limestone

Zenah,

Görög

2024

Period. Polytech. Civil Eng.

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“…They confirmed that cavities significantly influenced ground motion at high frequencies. In this context, many researchers have explored the cavity or tunnel effect on seismic ground response under body waves through various methods, such as analytical methods [8][9][10], numerical simulations [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], and model tests [27][28][29][30]. Due to the complexity involved in wave propagation and limitations in modeling complicated systems of equations, numerical techniques are more effective compared to analytical and model tests for the parametric study of ground vibration problems [31].…”

Section: Introductionmentioning

confidence: 99%

A numerical study on effect of underground cavities on seismic ground response due to Rayleigh wave propagation

2023

Self Cite

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Recent studies found that some structural damage can be attributed to the effect of surface waves. A shallow underground structure may be heavily influenced by surface waves, which makes to lose energy over distance more slowly than body waves. This study deals with evaluating the effect of Rayleigh waves (R-waves) interaction with underground cavities on the seismic ground response and amplification pattern using the Finite Element Method (FEM). First, the FEM model was verified to ensure its accuracy. Then, the influences of the effective parameters, such as cavity burial depth, distance from the cavity axis, and dimensionless incident frequency were investigated. Parametric studies revealed that the amplitude of ground motion is greater in the presence of a cavity with respect to that in the free-field condition. It was indicated that shallow cavities cause more amplification than cases with a larger depth ratio. By moving away from the wave source, the response of receiver points has a declining trend. Due to the complex interaction of R-waves with a cavity, the right side of the cavity has less amplitude than the left side. Finally, by increasing the dimensionless incident frequency, the distribution of the surface displacements and wave diffraction patterns gradually becomes more complicated while the peak displacement components decrease. Consequently, in light of the importance of the R-wave interaction with subsurface spaces, the findings of this study can help improve seismic design procedures and seismic microzonation guidelines.

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“…The model test is also very useful for validating numerical tools, constitutive models, and the boundary-value problem [7]. In addition, many numerical studies have been conducted on the seismic failure mechanism of underground structures [10][11][12][13][14], but most studies lack validation by physical model tests. Therefore, model tests are critical to investigate the seismic response of complex underground structures.…”

Section: Introductionmentioning

confidence: 99%

“…The model tests on the seismic response of large-section underground structures are still rare, and there is still a lack of research on the additional deformation and internal forces of underground structures caused by earthquakes [6,16]. In addition, limited studies have been carried out to investigate the soil-structure interaction (SSI) effects [14,15].…”

Section: Introductionmentioning

confidence: 99%

Seismic Response of a Two-Story Three-Span Subway Structural Model under High-Accelerated Geotechnical Centrifuge Shaking Table Test

Zhao

Wang

2022

Infrastructures

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The seismic response of underground structures such as subway stations is critical. However, the complex underground structure experiments under a dynamic centrifuge shaking table are significantly limited. This study conducts a shaking table test of a two-story three-span underground structure under 50 g gravitational centrifuge acceleration to investigate soil–structure interaction effects (SSI). The test is performed on a sand soil-structural model using a laminar shear box with depths of 2.5 m, and the input motion is a Parkfield wave. The experimental results indicate that the central column of the two-story three-span underground structure is the weak component during the earthquake. In addition, the numerical simulations of the soil–structure system are carried out to study the effect of buried depth and foundation soil type on the seismic response of the underground structures. The experimental and numerical results proved that the performed centrifuge test can reproduce the key seismic response characteristics of the SSI in the prototype underground structure and provided guidelines to design a similar underground structure in the future development of the urban subway systems.

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Numerical Study on Dynamic Effects of Soil-Tunnel-Structure Interaction

Cited by 12 publications

References 19 publications

The Effect of GSI and mi on the Stability of 3D Twin Tunnel in Limestone

The Effect of GSI and mi on the Stability of 3D Twin Tunnel in Limestone

A numerical study on effect of underground cavities on seismic ground response due to Rayleigh wave propagation

Seismic Response of a Two-Story Three-Span Subway Structural Model under High-Accelerated Geotechnical Centrifuge Shaking Table Test

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