Assessment of the dynamic stability of the portals of the Dorukhan tunnel using numerical analysis

Geniş, Melih

doi:10.1016/j.ijrmms.2010.09.013

Cited by 57 publications

(20 citation statements)

References 14 publications

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“…In the process of dynamic calculation, the classic Mohr-Coulomb strength criterion is adopted and the yield function [34] is calculated using equations (8) and (9):…”

Section: Dynamic Boundary Conditions Andmentioning

confidence: 99%

“…Tunnels are deemed to perform much better than surface structures during earthquakes [1][2][3][4][5], and their seismic capacities improve with the increase of embedment depths [6,7]. However, the observations after earthquakes with an acceleration larger than 0.2 g found that severe damage occurred in tunnels due to strong earthquake shaking [8,9]. Severe damage usually occurs due to poor geological conditions, such as fault, portals, unsymmetrical loading section, and shallow buried depth [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Modeling of Seismic Responses and Seismic Measures of Tunnel Crossing a Fault Zone: A Case Study

Lin

Xian

Yao

et al. 2020

Advances in Materials Science and Engineering

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e investigation shows that Longxi Tunnel, across a fault zone, was severely damaged during the 2008 Wenchuan earthquake, China. In this paper, the dynamic time history analysis method is used to study the seismic response characteristics of Longxi Tunnel and the aseismic effect of seismic measures. e interfaces of the fault are simulated by bonded interfaces. e results show that high earthquake intensity, high in situ stress, and fault zone are the main reasons for damage of Longxi Tunnel. e inconsistent motion response between the normal surrounding rocks and surrounding rocks within the fault zone resulted in the damage of Longxi Tunnel, and the maximum displacement difference reaches 50 cm. With the seismic measure by setting shake absorb layer and seismic joints, the tunnel has better performance: the maximum peak internal force of the tunnel structure is reduced by about 26% and the acceleration is reduced by 30%. Seismic measures should not only be considered within fault zones but also extend to adjacent surrounding rocks. In this study, the fault seismic measures of Longxi Tunnel should be no less than 4.0 times the tunnel diameter.

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“…In the process of dynamic calculation, the classic Mohr-Coulomb strength criterion is adopted and the yield function [34] is calculated using equations (8) and (9):…”

Section: Dynamic Boundary Conditions Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Seismic Responses and Seismic Measures of Tunnel Crossing a Fault Zone: A Case Study

Lin

Xian

Yao

et al. 2020

Advances in Materials Science and Engineering

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“…Hashash et al [13] summarized several deformation forms, namely, (1) compression and extension along the tunnel axis; (2) longitudinal bending caused by the components of seismic waves perpendicular to the longitudinal axis; (3) ovaling or racking shear deformation of tunnel sections; (4) compression deformation of tunnel sections. In addition, a series of parameters, such as geological conditions, distance to the epicenter, seismic intensity, maximum ground acceleration/velocity/displacement, etc., were demonstrated to be particularly relevant to the seismic behavior of tunnels [12]. Those works effectively enhance our understanding of the seismic behaviors of tunnels and provide a guidance for the seismic design of tunnels.…”

Section: Introductionmentioning

confidence: 85%

“…A 3D input method of shear waves was employed by Huang et al [11] to investigate the impacts of the incident angles on the seismic response of a long lined tunnel. More relevant works on the seismic behaviors of tunnels can be found in [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Seismic Response of a Hydraulic Tunnel Considering Fluid-Solid Coupling

Lyu

et al. 2018

Mathematical Problems in Engineering

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The seismic response of hydraulic tunnels is a complex nonlinear process. What makes the case even more interesting is that the large amount of water in hydraulic tunnels which is likely to induce considerable hydrodynamic pressure acted on tunnel structures during earthquakes. In this work, a full three-dimensional (3D) dynamic finite element model is adopted to conduct a comprehensive assessment of the seismic behaviors of a hydraulic tunnel system. In this analysis, the plastic-damage model is employed to reflect the nonlinear mechanical behaviors of the concrete lining, and a fluid-solid coupling method based on an explicit weighted residual approach is proposed to consider the effects of the hydrodynamic pressures on the seismic response of the hydraulic tunnel. The numerical results indicate that the hydrodynamic pressure contributes to a greater seismic response of the tunnel structure. When the hydrodynamic pressure is considered, the magnitudes of the maximum principal stresses are likely to increase by 50% and the displacement amplitudes are approximately 2 cm more than that of without hydrodynamic pressure. The hydrodynamic pressure exacerbates the damage degree of the tunnel structure, and the waist suffers the most severe damage.

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“…The damage to tunnel portal sections includes the cracks in portal part structure and lining (Genis, 2010). There are numerous reports on the damage to tunnel portals caused by earthquakes.…”

Section: Introductionmentioning

confidence: 99%

3-D shell analysis of structure in portal section of mountain tunnel under seismic SH wave action

Tao

Hou

Zhao

et al. 2015

Tunnelling and Underground Space Technology

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Assessment of the dynamic stability of the portals of the Dorukhan tunnel using numerical analysis

Cited by 57 publications

References 14 publications

Numerical Modeling of Seismic Responses and Seismic Measures of Tunnel Crossing a Fault Zone: A Case Study

Numerical Modeling of Seismic Responses and Seismic Measures of Tunnel Crossing a Fault Zone: A Case Study

Nonlinear Seismic Response of a Hydraulic Tunnel Considering Fluid-Solid Coupling

3-D shell analysis of structure in portal section of mountain tunnel under seismic SH wave action

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