Structural damage assessment of mountain tunnels in fault fracture zone subjected to multiple strike-slip fault movement

Zhong, Zilan; Wang, Zhen; Zhao, Mi; Du, Xiuli

doi:10.1016/j.tust.2020.103527

Cited by 80 publications

(10 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The tangential mechanical behavior of the interface is based on Coulomb's law of friction, and the penalty stiffness algorithm is used to allow elastic slip deformation. When the tangential contact shear stress exceeds the critical value, the relative slip will occur between the primary support and the secondary lining, and the value of friction coefficient is 0.4 [18], and the friction contact coefficient between the fault fracture zones and the moving block is set as 0.1 [19].…”

Section: Finite Element Model and Parametermentioning

confidence: 99%

Study on Damage Evolution of Tunnel Lining under Strike-Slip Fault Movements

Yan

Sun

et al. 2023

Geofluids

View full text Add to dashboard Cite

For the purpose of investigating the damage mechanism and failure characteristics of tunnel lining under the strike-slip fault movements, a three-dimensional elastoplastic finite element model was established in the present study including a railway tunnel across an active strike-slip fault. With the assistance of this numerical model, the tensile and compressive damage, plastic strain development process, and shear failure of the secondary lining at different fault plane positions were analyzed, and further, the damage laws of the secondary lining at different fault displacement and tunnel-fault intersection angles were summarized. The simulation results showed that when the maximum imposed fault displacement is 30 cm, the most unfavorable fault plane appears at the junction between the moving block and the fracture zone, and serious tensile cracks and shear failures occur on each fault rupture plane. Besides, the maximum plastic strain and compressive damage are distributed in the vault and invert. In addition, with the increase of the fault displacement, the axial strain of the secondary lining increases as well, of which the main part shows the tensile strain. Interestingly, with the decrease of the crossing angle, the axial strain gradually changes from the tensile strain to the compressive strain, which is consistent with the direction of the fault angle. Furthermore, the tensile and compressive damage of the secondary lining increases with the increase of movement distance. At the same time, the tensile damage along the tunnel ring develops, and the compressive damage propagates mainly in tunnel vault and invert. With the decrease of the crossing angle, the degree of the tensile damage in the lining reduces, as well as its range. The compressive damage area of the lining develops from the vault and inverted arch to the tunnel wall on both sides, which has a trend of penetrating the side walls on both sides. The distribution area and maximum value of the overall lining damage indices in tensile (OLDT) and overall lining damage indices in compressive (OLDC) increase with the increase of fault movement distance. With the decrease of the crossing angle, the distribution range and maximum value of OLDT decrease, and the distribution range of OLDC increases, while the maximum value basically remains the same. The research results of the present work can provide reference for the antidislocation design of railway tunnels crossing strike-slip faults.

show abstract

Section: Finite Element Model and Parametermentioning

confidence: 99%

Study on Damage Evolution of Tunnel Lining under Strike-Slip Fault Movements

Yan

Sun

et al. 2023

Geofluids

View full text Add to dashboard Cite

show abstract

“…Related studies have analyzed the failure mechanism, forced response, and seismic performance of the integrated lining structure across the active fault structure (i.e. Zhang et al, 2018; Zhong et al, 2020), and many valuable conclusions have been obtained.…”

Section: Introductionmentioning

confidence: 99%

Response and failure mechanism of utility tunnel with flexible joints under reverse fault: An experimental, numerical, and analytical investigation

et al. 2023

View full text Add to dashboard Cite

Severe seismic damage occurs to tunnels across or adjacent to the active faults in a high-intensity earthquake area. Therefore, investigating the response and failure mechanism of the utility tunnel structure with flexible joints across the reverse fault is of significant importance. This paper conducts a model test of 1:30, modelling reverse fault rupture with a 45° dip angle and a utility tunnel with flexible joints embedded in the sand layer. The results show that the lining structure in the hanging wall area appears to have longitudinal cracks, concrete falls off, and there is continuous dislocation. Then, a nonlinear three-dimensional finite element model (FEM) is adapted to reveal the utility tunnel response under reverse faulting and to simulate the model test. The numerical results show that the tensile failure area of the lining caused by reverse faulting is larger than the compression failure area. The damage distribution has regional characteristics, and especially the joint area is seriously damaged. The settlement profile of the tunnel under reverse fault can be fitted reasonably by a complementary error function. Finally, an analytical solution of the longitudinal response of the tunnel under reverse fault based on the double-parameter Pasternak model is derived. The analytical solution results show good agreement with the numerical and experimental results. The longitudinal response of the tunnel under reverse fault can be divided into two parts: the influence zone and the non-influenced zone. The flexible joints significantly reduce the damage degree and the damaged area of the tunnel caused by reverse fault dislocation.

show abstract

“…The interaction of surface faults with surface structures (e.g., bridges, dams, and buildings) or underground structures (e.g., tunnels and pipelines) may cause significant damage to them (Livaoglu et al, 2019;Rajyaswori et al, 2020;Xuepeng et al, 2020;Zhong et al, 2020;Yi et al, 2022). In order to fully understand this phenomenon, a great deal of research has been carried out on the aspect of tunneling through faults.…”

Section: Introductionmentioning

confidence: 99%

Influence of fault forms on the evolution of concrete damage patterns in tunnels

Chen

Wu²,

Zhang³

et al. 2022

Front. Mater.

View full text Add to dashboard Cite

Quickly and accurately estimating the seismic weak surface of a fault tunnel is one of the most severe challenges in tunnel seismic design. Therefore, the strong nonlinear response of the Jinping II Hydropower Station under the dislocations of positive, reverse, and slip faults was investigated through the finite element method using a static elastoplastic model. The results reveal the damage and failure mechanism of tunnels under different faults. By using the IDA damage rating index, the damage initiation, evolution, and development process of tunnels under different types of faults are analyzed. The results showed that the affected area of fault dislocation is concentrated and intense, which is mainly distributed along the two sides of the fault surface. The damage of the positive and reverse faults to the tunnel extends from the arch waist to the vault and the invert of the arch, while the influence of the slip fault on the tunnel is the greatest at the vault and invert of the arch and then extends to the arch waist. In terms of the impact range, the reverse fault is the biggest, followed by the slip fault, while the positive fault is the lowest. This study contributes to the design and construction of tunnels through the faults.

show abstract

Structural damage assessment of mountain tunnels in fault fracture zone subjected to multiple strike-slip fault movement

Cited by 80 publications

References 31 publications

Study on Damage Evolution of Tunnel Lining under Strike-Slip Fault Movements

Study on Damage Evolution of Tunnel Lining under Strike-Slip Fault Movements

Response and failure mechanism of utility tunnel with flexible joints under reverse fault: An experimental, numerical, and analytical investigation

Influence of fault forms on the evolution of concrete damage patterns in tunnels

Contact Info

Product

Resources

About