Effect of imperfect interfaces on dynamic response of a composite lining tunnel with an isolation layer under plane P and SV waves

Zhang, Ning; Yu, Zhongbo; Gao, Yufeng; Dai, Denghui; Huang, Changxi

doi:10.1016/j.soildyn.2021.106586

Cited by 23 publications

(3 citation statements)

References 43 publications

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“…The seismic response characteristics of the structure are related to the types and the incident angles of the seismic wave. Compared with P waves, the tunnel's damage caused by SV waves is more serious [23][24][25][26]. Savigamin et al [27] derived two analytical solutions to explore the structural axial direction response of the circular tunnel under the shear wave.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response and Damage Analysis of Shield Tunnel with Lateral Karst Cavity under Oblique SV Waves

Meng

Zhou

2023

Buildings

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The dynamic effects of the lateral karst cavity on the shield tunnels under different incident angles of seismic waves are investigated by numerical analysis in this paper, based on the Dalian Metro Line 5 project. The viscous-spring artificial boundary is applied and verified to guarantee the accuracy of seismic input. A simplified finite element model of shield tunnel is established based on the equivalent bending stiffness model. This paper compares the seismic response characteristics and damage states of the tunnel under different incident angles by analyzing the axial deformation, stress distribution, and damage severity, respectively. A new damage state classification criterion is proposed by introducing the relationship between cracks and tensile damage. The results show that the tunnel’s affected scope by the lateral karst cavity is twice the cavity diameter. As the incident angle increases, the tunnel’s displacement and stress increase and show the structural spatial difference, and the tunnel’s damage state is increasingly severe. The displacement and stress reach the max values when the incident angle is 30°. The cracks along the axial direction extend on the outer surface of the vault and bottom, and the crack width is greater than 0.2 mm, as that angle is 30°. The damage severity at the tunnel’s central zone is minimum along axial directions during seismic action, while the damage concentration occurs on the bottom at the end of seismic. The lateral karst cavity plays an energy dissipation and vibration reduction role to a certain extent, but it also aggravates the local damage. This paper can serve as a reference for the seismic design of tunnels in karst regions.

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Section: Introductionmentioning

confidence: 99%

Seismic Response and Damage Analysis of Shield Tunnel with Lateral Karst Cavity under Oblique SV Waves

Meng

Zhou

2023

Buildings

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“…Compared with single-layer lining and double-layer lining, the materials of the new composite lining structure are more diverse and the force transmission forms are more complex. There is a still lack of relevant research on force transmission among different layers of lining and the mechanism of load sharing (Mezger et al, 2017;Dong et al, 2021;Huang et al, 2021;Zhang et al, 2021;Zhou et al, 2021). In the past, it was seldom used to analyze the influence of structural parameters of "steel lining -SCC-segment" new composite lining by establishing an analytical model and analytical calculation method.…”

Section: Introductionmentioning

confidence: 99%

Study on Parameter Influence of New Composite Lining of Water Conveyance Tunnel Under High Internal Water Pressure

Zhu

Liu

2022

Front. Earth Sci.

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A new type of composite lining structure consisting of segments, steel pipes, and concrete lining can be adopted in the water conveyance tunnel to bear large internal water pressure. However, there is still no effective analysis model and calculation method for the parameter influence effect of this new composite lining. In this paper, the load structure method and the elasticity theory are adopted, the stress analysis model and theoretical calculation method of a new type of composite lining of water conveyance tunnel are given, and the influence law of lining structure parameters is studied. Each part of the shield assembled lining is regarded as a stressed spring, and a formula for calculating the equivalent elastic modulus of the overall structure at the joint of the lining under partial tension and partial compression is given. The stress and deformation of each layer of lining are deduced based on the theory of thick-walled cylinders. According to the actual project, the rationality of the calculation method is verified by comparing the results of finite element analysis, and the influence of the thickness of intermediate concrete lining and inner lining parameters on the distribution of force transmission among lining layers is further analyzed. The results show that the radial displacement and circumferential stress of each layer of lining structure decrease with increasing the thickness of the concrete lining. The larger the elastic modulus of the inner lining material is, the smaller the radial displacement of each lining structure will be, but the circumferential stress of the inner lining will increase. In addition, when the thickness of the steel pipe lining is reduced or the internal water pressure is increased, the circumferential stress and radial displacement generated by the inner lining will increase. This analysis model and method considering the deformation coordination relationship solves the problem of setting the parameters of the lining structure and has obvious advantages in the calculation of the stress and deformation of the new composite lining water conveyance tunnel structure, which can provide a theoretical basis for related engineering design.

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“…In addition, many other scholars have analytically studied the influence of tunnel shape [6][7][8]. However, numerous studies have been conducted on the effects excited by plane harmonic waves [3][4][5][6][7][8][9][10][11][12][13][14], while the incidence of near-source waves is still at a research stage. Most of the previous achievements of near-source effects consider incident waves to be line source cylindrical waves.…”

Section: Introductionmentioning

confidence: 99%

Propagation of Nonplanar SH Waves Emanating from a Fault Source around a Lined Tunnel

Zhang

Dai

et al. 2022

Sustainability

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An analytical solution is presented for scattering nonplanar SH waves emanating from a fault source using a lined tunnel. The lined tunnel is assumed to be an annular elastic solid in half-space. A simplified circular arc fault model is employed to represent the wave source. By means of the separation of variables method, all wave fields are given in terms of the wave function series with unknown coefficients. Taking advantage of the method of images, the zero-stress boundary condition on the horizontal ground surface is satisfied automatically. By applying Graf’s addition formula, a system of equations for seeking the unknowns is derived by taking advantage of the boundary conditions. The problem of wave scattering is finally solved after seeking solutions for the system of equations through standard matrix techniques. The effects of fault distance, fault curvature, and fault orientation are revealed with numerical results. It is found that the plane waves provide a good approximation to the fault-induced cylindrical waves when the source-receiver distance or fault radius of curvature is larger enough. Fault-induced topographic effects are strongly affected by source orientation.

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Effect of imperfect interfaces on dynamic response of a composite lining tunnel with an isolation layer under plane P and SV waves

Cited by 23 publications

References 43 publications

Seismic Response and Damage Analysis of Shield Tunnel with Lateral Karst Cavity under Oblique SV Waves

Seismic Response and Damage Analysis of Shield Tunnel with Lateral Karst Cavity under Oblique SV Waves

Study on Parameter Influence of New Composite Lining of Water Conveyance Tunnel Under High Internal Water Pressure

Propagation of Nonplanar SH Waves Emanating from a Fault Source around a Lined Tunnel

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