Investigation of Seismic Reliability Index in Shallow Underground Tunnels by Combining Three Methods of Surface Response, Hasofer–Lind and Finite Element Method

Momenzadeh, Mohammadreza; Koopialipoor, Mohammadreza; Tootoonchi, Hossein; Khalili, F. Ia.; Khorami, Sahand; Khorami, Sepehr

doi:10.1007/s10706-019-00880-7

Cited by 5 publications

(1 citation statement)

References 21 publications

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“…Similarly, Salemi et al [14], in 2018, investigated the behavior of the concrete lining of circular shallow tunnels in sedimentary urban areas under seismic loads using an integration of numerical and metaheuristic techniques. Furthermore, Momenzadeh et al [15], in 2019, explored the function of the tunnel lining under static and seismic conditions by combining the response surface method, the Hasofer-Lind reliability concept, and the finite element method, with a focus on the reliability of the lining system of a small underground tunnel in the soil. An et al [16], in 2021, established an ABAQUS finite element model to clarify the influence of fiber-reinforced concrete lining structure on the seismic performance of an urban shallow-buried rectangular tunnel.…”

Section: Introductionmentioning

confidence: 99%

Shaking Table Testing and Numerical Study on Aseismic Measures of Twin-Tube Tunnel Crossing Fault Zone with Extra-Large Section

Zhao,

Liang,

Zhao

et al. 2024

Applied Sciences

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As transportation networks continue to expand into mountainous regions with high seismic activity, ensuring the seismic safety of tunnels crossing active faults has become increasingly crucial. This study aimed to enhance our understanding of the impact of fault zones on the seismic behavior of tunnels and to provide optimized seismic design recommendations through a comprehensive experimental and numerical investigation. The focus of this research is the Xiangyangshan Highway Tunnel in China, which intersects a significant longitudinal fault. Large-scale shake table tests were performed on 1:100 scale physical models of the tunnel to analyze the seismic responses under various ground motion excitations. Detailed three-dimensional finite difference models were developed in FLAC3D and calibrated based on the shake table results. The tests indicated that strains, earth pressures, and accelerations experience localized amplification within 10–20 m of the fault interface compared to undisturbed ground sections. Common seismic mitigation measures, such as rock grouting, seismic joints, and shock absorption layers, were observed to effectively reduce the amplified seismic demands. Grouting, in particular, led to an average reduction of up to 56.3% in circumferential strain and 38.5% in earth pressure. It was concluded that 6 m thick grouted zones and 20 cm thick rubber interlayers between tunnel lining shells provide optimal structural reinforcement against the effects of fault zones. This study provides valuable insights for improving the seismic resilience of underground transportation corridors in seismically active regions.

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Section: Introductionmentioning

confidence: 99%

Shaking Table Testing and Numerical Study on Aseismic Measures of Twin-Tube Tunnel Crossing Fault Zone with Extra-Large Section

Zhao,

Liang,

Zhao

et al. 2024

Applied Sciences

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Investigating the effect of jointed environment on the cracked concrete arch dam in 3D conditions using FEM

Armaghani

Bayat

Koopialipoor

et al. 2020

Bull Eng Geol Environ

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Investigation of Stress Arching Above Depleting Hydrocarbon Reservoirs and Its Effect on the Compaction Drive Mechanism

et al. 2021

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In this paper, the compression drive mechanism, which can be considered as the most related oil drive mechanism with the reservoir geomechanical properties, has been investigated. The constant total vertical stress on the reservoir and uniaxial reservoir compaction with zero lateral strain are two main assumptions in the conventional reservoir compaction modeling. These assumptions are not considering the stress arching, which leads to a reduction in the total vertical stress and also affects the distribution of vertical and horizontal stresses. In this paper, it was tried to investigate the effects of three keys elastic parameters, including Young's modulus, Poisson's ratio, and Biot coefficient on the reservoirs stress paths and compaction drive mechanism using numerical modeling with ABAQUS software. Based on the modeling results the reservoirs stress paths is very different from simplifying assumption in uniaxial compaction models while the total compaction of reservoir obtained using numerical modeling and uniaxial model in some cases can be equal. Also, among the three geomechanical parameters, the ratio of Young's modulus of the reservoir and surrounding rocks has a significant effect on the reservoir stress paths and compaction. The results of modeling indicate when a reservoir rock is softer than its surrounding environment, due to the arching occurrence, the total vertical stress applied to the reservoir rock reduced even to half of the initial vertical stress, which leads to the oil recovery by the compression drive mechanism will be less than 50% of the predicted value.

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Investigation of Seismic Reliability Index in Shallow Underground Tunnels by Combining Three Methods of Surface Response, Hasofer–Lind and Finite Element Method

Cited by 5 publications

References 21 publications

Shaking Table Testing and Numerical Study on Aseismic Measures of Twin-Tube Tunnel Crossing Fault Zone with Extra-Large Section

Shaking Table Testing and Numerical Study on Aseismic Measures of Twin-Tube Tunnel Crossing Fault Zone with Extra-Large Section

Investigating the effect of jointed environment on the cracked concrete arch dam in 3D conditions using FEM

Investigation of Stress Arching Above Depleting Hydrocarbon Reservoirs and Its Effect on the Compaction Drive Mechanism

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