Internal blast loading in a buried lined tunnel

Feldgun, V.R.; Kochetkov, A. V.; Karinski, Y.S.; Yankelevsky, David Z.

doi:10.1016/j.ijimpeng.2007.01.001

Cited by 82 publications

(41 citation statements)

References 10 publications

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“…Both the method and the equations have been described in detail in recently published papers [17,18] and therefore only its principles will be presented in this section. The lining is modeled as a thin-wall, elastic-plastic Timoshenko shell [35].…”

Section: The Lining's Equations Of Motion and The Vdmmentioning

confidence: 99%

Explosion‐induced dynamic soil–structure interaction analysis with the coupled Godunov–variational difference approach

Karinski

Feldgun

Yankelevsky

2008

Numerical Meth Engineering

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SUMMARYThe paper presents a coupled 2D Godunov-variational difference approach for soil-structure interaction due to a nearby explosion. Owing to the high-intensity dynamic loads, complex processes take place, including transient separation of the buried structure from the surrounding soil, large deformations of the buried structure including loss of stability, and so on. The approach takes into account the irreversible bulk compaction of the soil medium and is based on the relationships of the shock and rarefaction waves with finite-difference equations of the shell motion, using a simple iteration method. The model reduces the contact problem to the self-similar symmetric Riemann problem.The proposed approach is demonstrated by the solution of a buried explosion in the proximity of a lined tunnel buried in soil. The peak contact pressure envelope along the lining was studied. It was found that for an explosion in the proximity of a relatively rigid shell, the maximum value of this envelope is located at some distance from the lining's axis of symmetry.

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Section: The Lining's Equations Of Motion and The Vdmmentioning

confidence: 99%

Explosion‐induced dynamic soil–structure interaction analysis with the coupled Godunov–variational difference approach

Karinski

Feldgun

Yankelevsky

2008

Numerical Meth Engineering

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“…As for theoretical investigation, a tunnel's response to internal blast loads is generally treated as an axisymmetric plane strain problem, where the blast loading is simplified as uniformly distributed loading which keeps constant along the axial direction, and the tunnel is modeled with continuous isotropic thin shell [18][19][20], but this can hardly be the real case since the explosion could not be a centric infinite line charge detonation. Among those theoretical studies, Gao et al [21] studied a 3D problem of point-source explosion's effects on a long straight cylindrical tunnel in soil.…”

Section: Introductionmentioning

confidence: 99%

Vibration of a Cylindrical Tunnel under a Centric Point-Source Explosion

Zhao

Chen

Vafeidis

et al. 2017

Shock and Vibration

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Underground tunnels are vulnerable to terrorists' bombing attacks, which calls for studies on tunnel's response to internal explosive loading. In this paper, the dynamic response of a cylindrical tunnel to an ideal centric point explosion was treated as an axisymmetric 2-dimensional problem, in which the tunnel was modeled with a continuous anisotropic shell, while the ground medium's effect was accounted for with linear elastic Winkler springs and the explosive loading described by a temporal and spatial function. The governing equation of the motion is a fourth-order partial differential equation, for which a numerical method combining finite difference with the implicit Newmark-method was adopted. This method avoided complicated integral transform and numerical inverse transformation, thus allowing efficient parameter study. The maximum radial displacement was found on the cricle of the center of explosive, where hoop stress is the maximum principal stress. The anisotropy showed little influence on maximum hoop stress. Within the range of ground medium's modulus, minor influence on maximum hoop stress was incurred. This research may be helpful to hazard assessment and protective design for some critical subway tunnels.

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“…Also, blast load was simulated using CONWEP. Feldgun et al [10,11] and Karinski et al [16] used the variational difference method to analyze underground tunnels and cavities subjected to blast loads. Yang et al [24] studied response of underground metro tunnel subjected to above ground explosion through finite element analysis procedure using von-Mises material model for soil.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Analysis of Twin Tunnel Subjected to Internal Blast Loading

Tiwari

Chakraborty

Matsagar

2014

Advances in Structural Engineering

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The present study deals with three dimensional nonlinear finite element analyses of underground twin tunnels in soil with reinforced concrete (RC) lining subjected to internal blast loading for blast occurring in one tunnel. The blast load has been simulated using coupled Eulerian-Lagrangian (CEL) analysis tool available in finite element software Abaqus/Explicit. Soil mass and RC lining have been modeled using three dimensional eight node reduced integration Lagrangian elements (C3D8R). Beam elements (B31) have been used to model reinforcement of RC lining. A 50 kg TNT charge weight has been used in the analysis. Eight node reduced integration Eulerian elements (EC3D8R) have been used to model the TNT explosive and the surrounding air. Drucker-Prager plasticity model available in Abaqus has been used to simulate strain rate dependent behavior of soil mass. For simulating strain rate dependent behavior of concrete and steel, concrete damaged plasticity and Johnson-Cook plasticity models, available in Abaqus, have been used, respectively. The explosive (TNT) has been modeled using JWL equation-ofstate. Investigations have been performed for studying the deformation of RC lining and surrounding soil mass. Pressure in the RC lining and surrounding soil mass, caused by explosive induced shock wave have also been studied for both tunnels. It is observed that deformation in tunnel away from blast decreases with increasing soil cover in between two tunnels.

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Internal blast loading in a buried lined tunnel

Cited by 82 publications

References 10 publications

Explosion‐induced dynamic soil–structure interaction analysis with the coupled Godunov–variational difference approach

Explosion‐induced dynamic soil–structure interaction analysis with the coupled Godunov–variational difference approach

Vibration of a Cylindrical Tunnel under a Centric Point-Source Explosion

Dynamic Analysis of Twin Tunnel Subjected to Internal Blast Loading

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