Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical Analysis of Cut-and-Cover Tunnels Under Surface Blast Loads and Mitigation Strategies
https://orcid.org/http://orcid.org/0000-0002-9570-6801
A non-linear simulation of a shallow buried cut-and-cover tunnel exposed to extreme surface blast conditions was performed utilizing finite element–based dynamic explicit analysis. The Mohr–Coulomb plasticity model was employed to simulate the soil, the concrete damaged plasticity model depicted the behavior of concrete, and the Johnson–Cook model was utilized for the steel reinforcement. The conventional weapons blast function simulated the trinitrotoluene charge weight. The parametric simulations encompassed four vehicular explosions, two soil types, the inclusion of sheet pile walls, and variable depth-to-height ratios (d/h) of the tunnel. The investigation focused on mitigation through the application of an energy-absorbing material, specifically steel-fiber–reinforced concrete. Results showed that the displacement of the upper slab escalates with an increase in charge weight. The existence of a sheet pile wall enhances the structure’s stiffness, resulting in increased displacement and tensile damage, but the displacement of the top slab diminishes as the d/h ratio escalates. The extent of damage has been noted to decrease with an increase in the d/h ratio, or cover thickness. These findings underscore the significance of structural configuration and mitigation strategies in reducing the impact of surface blasts on cut-and-cover tunnels.
Numerical Analysis of Cut-and-Cover Tunnels Under Surface Blast Loads and Mitigation Strategies
https://orcid.org/http://orcid.org/0000-0002-9570-6801
A non-linear simulation of a shallow buried cut-and-cover tunnel exposed to extreme surface blast conditions was performed utilizing finite element–based dynamic explicit analysis. The Mohr–Coulomb plasticity model was employed to simulate the soil, the concrete damaged plasticity model depicted the behavior of concrete, and the Johnson–Cook model was utilized for the steel reinforcement. The conventional weapons blast function simulated the trinitrotoluene charge weight. The parametric simulations encompassed four vehicular explosions, two soil types, the inclusion of sheet pile walls, and variable depth-to-height ratios (d/h) of the tunnel. The investigation focused on mitigation through the application of an energy-absorbing material, specifically steel-fiber–reinforced concrete. Results showed that the displacement of the upper slab escalates with an increase in charge weight. The existence of a sheet pile wall enhances the structure’s stiffness, resulting in increased displacement and tensile damage, but the displacement of the top slab diminishes as the d/h ratio escalates. The extent of damage has been noted to decrease with an increase in the d/h ratio, or cover thickness. These findings underscore the significance of structural configuration and mitigation strategies in reducing the impact of surface blasts on cut-and-cover tunnels.
Numerical Analysis of Cut-and-Cover Tunnels Under Surface Blast Loads and Mitigation Strategies
https://orcid.org/http://orcid.org/0000-0002-9570-6801
A non-linear simulation of a shallow buried cut-and-cover tunnel exposed to extreme surface blast conditions was performed utilizing finite element–based dynamic explicit analysis. The Mohr–Coulomb plasticity model was employed to simulate the soil, the concrete damaged plasticity model depicted the behavior of concrete, and the Johnson–Cook model was utilized for the steel reinforcement. The conventional weapons blast function simulated the trinitrotoluene charge weight. The parametric simulations encompassed four vehicular explosions, two soil types, the inclusion of sheet pile walls, and variable depth-to-height ratios (d/h) of the tunnel. The investigation focused on mitigation through the application of an energy-absorbing material, specifically steel-fiber–reinforced concrete. Results showed that the displacement of the upper slab escalates with an increase in charge weight. The existence of a sheet pile wall enhances the structure’s stiffness, resulting in increased displacement and tensile damage, but the displacement of the top slab diminishes as the d/h ratio escalates. The extent of damage has been noted to decrease with an increase in the d/h ratio, or cover thickness. These findings underscore the significance of structural configuration and mitigation strategies in reducing the impact of surface blasts on cut-and-cover tunnels.
Numerical Analysis of Cut-and-Cover Tunnels Under Surface Blast Loads and Mitigation Strategies
Transp. Infrastruct. Geotech.
Ansari, Mohammad Asim (Autor:in) / Rais, Ibraheem (Autor:in) / Sadique, Md. Rehan (Autor:in) / Samanta, Manojit (Autor:in)
01.03.2025
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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