Seismic response of tunnel under normal fault slips by shaking table test technique

Fan, Ling; Chen, Jie-ling; Peng, Shuquan; Qi, Bin-xi; Zhou, Qi-wen; Wang, Fan

doi:10.1007/s11771-020-4368-0

Cited by 23 publications

(11 citation statements)

References 33 publications

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“…As for the interaction between tunnel and soil surrounding rock, no-thickness Goodman [7][8] unit is adopted herein. Such contact unit is set at the contact surface between slide-resistant pile and landslide mass, and its stress can be broken down into normal stress and tangential stress.…”

Section: Boundary Conditions and The Contact Surfacementioning

confidence: 99%

Study on Dynamic Property of Tunnels Crossing Rock Fracture Zone

Liu

Lai

Wang

2022

Advances in Transdisciplinary Engineering

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Fault, crushed zone, and other unfavorable geology may frequently appear in the construction of tunnels, so it is of course necessary to study on the dynamic properties of tunnels crossing rock fracture zone. Taking the tunnel crossing faults as the object, this paper discussed the dynamic constitutive relation satisfied by tunnel structures and researched the loading features and failure characteristics of the different tunnel crossing faults. It shows that: (1) tunnels in areas with high seismic intensity shall have reinforced concrete lining, to improve its ability of resisting tension failure, (2) the stress at the waist on both sides of the tunnel arch is the maximum, and tunnels in areas with high seismic intensity shall have reinforced concrete lining to improve its ability of resisting tension failure. This research is of great reference significance to the construction of tunnels crossing rock fracture zone.

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Section: Boundary Conditions and The Contact Surfacementioning

confidence: 99%

Study on Dynamic Property of Tunnels Crossing Rock Fracture Zone

Liu

Lai

Wang

2022

Advances in Transdisciplinary Engineering

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“…Many scholars have researched the mechanism behind damage to tunnel-crossing faults and achieved relevant results [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. For example, Mehdi Sabagh [14] conducted a 1:60 centrifuge test of a tunnel crossing an active normal fault, exploring the mechanism of tunnel failure and the process of crack development.…”

Section: Introductionmentioning

confidence: 99%

Longitudinal Seismic Response of Metro Tunnels Crossing a Fault with Multi-Slip Surfaces

Wang,

Yang,

Teng

et al. 2024

Buildings

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There are multiple seismic fault zones near Xi’an in China, among which the Li Piedmont Fault has multiple slip surfaces. A 3D finite element dynamic Soil–Fault–Tunnel model was established based on the engineering background of the Xi’an Metro tunnel orthogonally crossing the Li Piedmont Fault. The input seismic loads used the Chi-Chi, El-Centro, and artificial seismic waves, and the latter was artificially synthesized based on seismic conditions and site conditions of actual engineering. The Chi-Chi seismic wave with larger PGV/PGA and wider acceleration-sensitive area is a near-field seismic wave, while the others are far-field seismic waves. The seismic loads were transformed into the equivalent nodal force on the boundary nodes of the model, and nonlinear dynamic calculation was carried out to obtain the longitudinal seismic response of the structure. The main results show that the fault amplifies the seismic response of the tunnel, and the tunnel at the position of the fault slip surfaces is more vulnerable to failure, especially near the slip surface between the hanging wall and the fault, where the maximum acceleration, soil pressure, and internal force of the tunnel structure occur. In addition, the seismic response of the tunnel and soil caused by near-field seismic motion is significantly stronger than that caused by far-field seismic motion.

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“…Another reason is that the dissipated energy of the tunnel sharply increases under their subsequent actions, when compared to one of their actions [32]. The third reason is that the cumulative attenuation of the tunnel's overall stiffness induced by a normal fault creep slip increases the seismic dynamic response of the tunnel following subsequent earthquakes [33]. An adjustable flexible joint can not only improve the aseismic capability of the tunnel, but it can also impede the reduction of the overall tunnel stiffness by the concentration of shear tunnel displacement into the tunnel connection.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Dynamic Response of Fault-Crossing Tunnels under Strike-Slip Fault Creep-Slip and Subsequent Seismic Shaking

et al. 2023

Self Cite

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Tunnels built in geologically active areas are prone to severe damage due to fault dislocation and subsequent earthquakes. Using the Ngong tunnel in the East African Rift Valley as an example, the dynamic response of a fault-crossing tunnel and the corresponding sensitivity are numerically simulated by considering four factors, i.e., tunnel joint stiffness, isolation layer elastic modulus, strike-slip fault creep-slip and earthquakes. The results show that a valley-shaped propagation of peak displacement at the tunnel invert occurs in the longitudinal axis direction under an earthquake alone. Then, it transforms into an S-shaped under strike-slip fault creep-slip and subsequent seismic shaking. The tunnel invert in the fault zone is susceptible to tensile and shear failures under strike-slip fault creep-slip movements of less than 15 cm and subsequent seismic shaking. Furthermore, the peak tensile and shear stress responses of the tunnel invert in the fault zone are more sensitive to fault creep-slip than earthquakes. They are also more sensitive to the isolation layer elastic modulus compared to the joint stiffness of a segmental tunnel with two segments. The stress responses can be effectively reduced when the isolation layer elastic modulus logarithmic ratio equals −4. Therefore, the isolation layer is more suitable to mitigate the potential failure under small strike-slip fault creep-slip and subsequent seismic shaking than segmental tunnels with two segments. The results of this study can provide some reference for the disaster mitigation of fault-crossing tunnels in terms of dynamic damage in active fault zones.

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Seismic response of tunnel under normal fault slips by shaking table test technique

Cited by 23 publications

References 33 publications

Study on Dynamic Property of Tunnels Crossing Rock Fracture Zone

Study on Dynamic Property of Tunnels Crossing Rock Fracture Zone

Longitudinal Seismic Response of Metro Tunnels Crossing a Fault with Multi-Slip Surfaces

Numerical Investigation on the Dynamic Response of Fault-Crossing Tunnels under Strike-Slip Fault Creep-Slip and Subsequent Seismic Shaking

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