Shaking table test on seismic performances of newly designed joints for mountain tunnels crossing faults

Yan, Gaoming; Gao, Bo; Shen, Yusheng; Zheng, Qing; Fan, Kaixiang; Huang, Haifeng

doi:10.1177/1369433219868932

Cited by 26 publications

(12 citation statements)

References 23 publications

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“…Substituting (10) into (6), the expansion direction can be determined by (8) and (9). In particular, when the material is isotropic and other affecting factors are not taken into account, σ ic � σ 0 , τ θc � τ 0 , E i � E 0 , and G θ � G 0 are all constants, and then (6) can be simplified to…”

Section: Sedr Principlementioning

confidence: 99%

“…e second aspect is the experimental researches on tunnel models. For instance, large shaking table model tests [5][6][7][8][9] were conducted, which have obtained fruitful achievements in the field of seismic affecting factors of lining structures. e third aspect is seeking breakthroughs in theoretical analyses, which focuses on establishing constitutive models to obtain the stress state of lining structures with seismic excitation [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Seismic Damage Prediction Method for Lining Structures Based on the SEDR Principle

Zheng

Xin

Shen

et al. 2021

Shock and Vibration

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The safety and stability of lining structures are core concerns of tunnel and underground engineering. It is crucial to determine whether a lining structure would crack and which direction the crack would expand with seismic excitation. In previous literature, the principle based on stress and strain has been widely used to predict the seismic damage of lining structures, whereas it cannot specify the cracking modes. Taking account of that deficiency, this paper introduces the strain energy density ratio (SEDR) principle and proposes a seismic damage prediction method for lining structures, which can precisely predict the crack positions and expansion directions. Moreover, numerical simulations of the typical seismic damage sections of two tunnels in the Great Wenchuan Earthquake and a calculating example of the theoretical equations are conducted to verify the proposed method. In summary, the numerical simulation results show that the arch springing cracks first, and the invert cracks next; then the cracks expand to the spandrel, and finally, they form oblique cracks, annular cracks, and longitudinal cracks, whose positions and patterns are in accordance with the field investigation results. In terms of the calculating example results, the obtained two-fold SEDR and cracking angle θ are 1.87 and −6.28°, respectively, which are consistent with the numerical simulation results. Therefore, one can see that the proposed seismic damage prediction method based on the SEDR principle is quite accurate. This method can be used to predict the seismic damage of lining structures and provide a reference for the research of the damage mechanism of tunnels.

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Section: Sedr Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic Damage Prediction Method for Lining Structures Based on the SEDR Principle

Zheng

Xin

Shen

et al. 2021

Shock and Vibration

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“…Lining. e mechanical parameters of composite lining were obtained from practical engineering [44]. After a series of material tests, water, plaster, diatomite, quartz sand, and barite were adopted to simulate the composite lining with the ratio of 1 : 0.6 : 0.2 : 0.1 : 0.4 [45].…”

Section: E Similar Materials Of Tunnelmentioning

confidence: 99%

“…A mixture of fly ash, river, sand, and machine oil was selected to simulate the similar materials of surrounding rocks [44][45][46]. e ratio of hard rock was fly ash:river sand:oil � 50 : 40 : 10, and the ratio of soft rock was fly ash:river sand:oil � 45 : 40 : 15.…”

Section: Similar Materials Of Surrounding Rockmentioning

confidence: 99%

Dynamic Response of Composite Lining Tunnel with Buffer Layer: An Analytical and Experimental Investigation

Fan

Shen

Wang

et al. 2020

Mathematical Problems in Engineering

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Composite lining is often designed for the mountainous tunnels in high-intensity earthquake areas. The application of the buffer layer will bring more advantages, while the shock-absorbing mechanism is still unclear currently. In this paper, based on the Fourier-Bessel series expansion method, the dynamic stress concentration factor of composite lining tunnel with buffer layer subjected to plane SV waves in the half-space is obtained. Then, the influence of geometric and mechanical parameters of the buffer layer on composite lining was systematically analyzed. Finally, the correctness of the analytical solutions is verified by series shaking table tests and numerical simulations. Results suggest that the buffer layer can play the role of “redistributing” the seismic load, and it can effectively reduce the dynamic responses of secondary lining but amplify in primary support. There is an optimal interval of the stiffness and thickness for the buffer layer. When the stiffness ratio of the buffer layer to surrounding rock is 1/10 ∼ 1/50 or the ratio of buffer layer thickness to inner diameters of secondary lining is 1/40 ∼ 1/20, the shock-absorbing performance is remarkable. The general damage observations in tests show that the crown, arch springing, and invert of composite lining in case of no buffer layer are prone to cracking under a strong earthquake. The invert of the composite lining is more susceptible to be damaged after adopting the buffer layer. In general, the analytical results were consistent with experimental and numerical results. The above study results may provide theoretical support and experimental data for the seismic design of composite lining tunnels.

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“…A large number of tunnel projects in China that are under construction or have already been built, are located in earthquake-prone areas, especially in the southwest. The seismic response of tunnels in areas of high earthquake intensity is a problem that must be faced in current tunnel construction, especially for tunnels through fault fracture zones [1][2][3]. The "5.12" Wenchuan earthquake indicated that tunnels with good engineering geological conditions show good seismic performance, while tunnels with complex geological conditions, including major changes of strata or poor rock properties, are more vulnerable to seismic damage.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response Analysis of Tunnel through Fault Considering Dynamic Interaction between Rock Mass and Fault

et al. 2021

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In order to explore the influences of fault dislocations on tunnel stability under seismic action, a nonlinear dynamic simulation method for the rock–fault contact system is proposed. First, considering the deterioration effect of seismic action on the ultimate bearing load of the contact interface between rock mass and fault, a mathematical model is established reflecting the seismic deterioration laws of the contact interface. Then, based on the traditional point-to-point contact type in a geometric mesh, a point-to-surface contact type is also considered, and an improved dynamic contact force method is established, which considers the large sliding characteristics of the contact interface. According to the proposed method, a dynamic finite element calculation for the flow of the rock–fault contact system is designed, and the accuracy of the method is verified by taking a sliding elastic block as an example. Finally, a three-dimensional (3D) calculation model for a deep tunnel through a normal fault is built, and the nonlinear seismic damage characteristics of the tunnel under horizontal seismic action are studied. The results indicate that the relative dislocation between the rock mass and the fault is the main factor that results in lining damage and destruction. The seismic calculation results for the tunnel considering the dynamic interaction between the rock mass and the fault can more objectively reflect the seismic response characteristics of practical engineering. In addition, the influences of different fault thicknesses and dip angles on the seismic response of the tunnel are discussed. This work provides effective technical support for seismic fortification in a tunnel through fault.

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Shaking table test on seismic performances of newly designed joints for mountain tunnels crossing faults

Cited by 26 publications

References 23 publications

Seismic Damage Prediction Method for Lining Structures Based on the SEDR Principle

Seismic Damage Prediction Method for Lining Structures Based on the SEDR Principle

Dynamic Response of Composite Lining Tunnel with Buffer Layer: An Analytical and Experimental Investigation

Seismic Response Analysis of Tunnel through Fault Considering Dynamic Interaction between Rock Mass and Fault

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