Numerical simulation of structural responses on a sand layer to blast induced ground excitations

Wu, Chengqing; Hao, Hong; Lu, Yong; Sun, Shengbo

doi:10.1016/j.compstruc.2004.01.003

Cited by 33 publications

(7 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, numerical methods should be applied to solve the problem. Various numerical models, including continuum-based approaches (Wu et al, 2004b;Yang et al, 1986;Hao et al, 2002ab;Rubin et al, 2000;Yang et al, 2010;Kim and Kim, 2001; Gui and Chien, 2006) and discrete particles-based approaches (Chen and Zhao, 1998;Chen et al, 2000;Fan et al, 2004;Hart, 1993) have been developed to investigate the stress wave propagation in the rock-soil mass and their interaction with buried structures. The discrete particles-based approach considers the rock blocks as discrete particles and analyses the mechanical properties of the assembly of these particles.…”

Section: I In Nt Tr Ro Od Du Uc Ct Ti Io On Nmentioning

confidence: 99%

“…The Courant-Friedrichs-Levy condition (Wilkins, 1964) for the time step is used as the sufficient condition to ensure the scheme's stability. According to this condition, the time step τ must be smaller than the time for the wave to travel to adjacent grid points: (61) Where h j−1/2, k−1/2 is a minimum height of the cell (j−1/2) and c j−1/2, k−1/2 is the largest wave velocity.…”

Section: Wherementioning

confidence: 99%

See 1 more Smart Citation

A Coupled Approach to Simulate the Explosion Response of a Buried Structure in a Soil-Rock Layered Medium

Feldgun

Karinski

Yankelevsky

2013

International Journal of Protective Structures

View full text Add to dashboard Cite

The paper presents an investigation on the response of a buried structure in a soft soil layer above a rock bed that is subjected to blast loading. A comprehensive approach to simulate the behavior of soft soil with a buried structure laying over a rock mass due to the dynamic (explosive) action in the rock mass is presented. The numerical algorithm was developed to simulate the shock wave propagation within the medium, considering both the bulk and deviatoric damage and taking into account the possible shear damage accumulation. It takes into account the contact conditions between the layers to simulate the shock wave transmission and the soil-structure interaction including their possible separation. The soil-lining interaction problem is solved by a combination of the variational-difference method (for the lining) and of the Godunov's method (for the soil). The coupling of these two approaches is performed by calculation of the contact stresses and velocities on the soil-lining boundary. Two types of the soil models were investigated – an ideal elastic plastic medium and an irreversible compressible medium with failure in bulk tension – and the results were compared with each other. The analysis of the free surface and interface velocities and displacements as well as the contact stresses and the damage at the media interface were carried out. The effects of the relative cover thickness on the interface and free surface behavior is studied. Analysis of the contact stresses at the soil-tunnel interface, was carried out. The effect of the charge location as well as the effect of the soil-rock interface on the tunnel's response was investigated.

show abstract

Section: I In Nt Tr Ro Od Du Uc Ct Ti Io On Nmentioning

confidence: 99%

Section: Wherementioning

confidence: 99%

A Coupled Approach to Simulate the Explosion Response of a Buried Structure in a Soil-Rock Layered Medium

Feldgun

Karinski

Yankelevsky

2013

International Journal of Protective Structures

View full text Add to dashboard Cite

show abstract

“…Mitigation of ground shock effects on structures by providing isolation through a sand base layer was studied by Wu et al (2004). The sand base was found to be effective in reducing the structural response and damage.…”

Section: Introductionmentioning

confidence: 98%

Fluid viscous damper in mitigation of structural vibration effect due to underground blast

Mondal

Ghosh

Chakraborty

2014

IJMSI

View full text Add to dashboard Cite

Blast induced ground vibration, caused by underground explosions, can result in substantial damage to nearby structures. In the present study, an investigation is made on the possible reduction of structural vibration effect due to underground blast by using the fluid viscous damper (FVD). The blast load is modelled by an exponentially decaying function representative of a typical rock blast. The cylindrical pot FVD is considered for which the fractionalderivative Maxwell model is adopted. The dynamic response analysis of the structure-FVD system is performed in the time domain by an equivalent single degree of freedom (SDOF) viscous oscillator approach which is also compared with the response obtained by the discrete Fourier transform (DFT) approach. It is generally observed that the peak structural displacement due to underground blast can be effectively reduced by the FVD while a limited amount of reduction in the peak absolute acceleration of the structure is obtained.Keywords: blast induced ground motion; cylindrical pot fluid viscous damper; fractional derivative Maxwell model.Reference to this paper should be made as follows: Mondal, P.D., Ghosh, A. and Chakraborty, S. (2014) 'Fluid viscous damper in mitigation of structural vibration effect due to underground blast', Int.

show abstract

“…The complex challenge to characterize the dynamic soil response under blast loading remains an on-going field of interest in applied mechanics and geotechnical engineering. Understanding explosive-induced geomaterials' behavior has diverse applications including mining and liquefaction [1,2], planetary impacts and cratering [3][4][5][6], ground surface instabilities [7], forensic engineering [8][9][10], flood risk management [11,12], and earthquake simulations [13][14][15]. Improvised explosive devices (IEDs) and landmines continue to present significant threats to military and civilian personnel.…”

Section: Introductionmentioning

confidence: 99%

Centrifuge Characterization of Buried, Explosive-Induced Soil Ejecta Kinematics and Crater Morphology

Hansen

Pak

2016

J. dynamic behavior mater.

View full text Add to dashboard Cite

A comprehensive experimental regime was conducted to advance the understanding of the mechanistic phenomena of buried, explosive-induced soil responses using geotechnical centrifuge modeling. To address experimental gaps in the current literature, this research documents the high-rate dynamic soil behavior under explosive loads with parametric variations of charge size, burial depth, and g-level in conjunction with post-detonation static measurement of blast-excavated craters. The novel integration of a high-speed imaging system into the centrifuge domain, placed in close proximity to the blast, enabled a rigorous in-flight characterization of the transient, multiphasic soil blast mechanics including early soil disaggregation, gas-particle interactions, and soil dome evolution. The results indicate that initial soil surface motions appear progressively later, post-detonation, with elevated acceleration. Furthermore, the data demonstrates that gravity-induced confining stresses reduce the temporal and spatial soil disaggregation flow kinematics. Crater dimensions, measured by a laser profilometer, also exhibit a gravity-dependent decrease and a new, dimensionless coupling function correlates the physical ejecta dynamics to the crater dimensional statics evident in the buried blast phenomena. An in-depth analysis compares this study's empirical scaling relationships in both dimensional and dimensionless form to a compilation of past field and centrifuge results and demonstrates their favorable correlation to full-scale explosive events. The high-fidelity, repeatable database establishes a benchmark for future parametric experimental investigations and provides a physical basis for calibration and validation of computational simulations of soil blast mechanics including soil deformation and ejecta flow. Keywords Centrifuge modeling Á Gravity scaling Á Buried blast loading Á High-explosives Á Soil ejecta Á Crater morphology & Curt Hansen

show abstract

Numerical simulation of structural responses on a sand layer to blast induced ground excitations

Cited by 33 publications

References 17 publications

A Coupled Approach to Simulate the Explosion Response of a Buried Structure in a Soil-Rock Layered Medium

A Coupled Approach to Simulate the Explosion Response of a Buried Structure in a Soil-Rock Layered Medium

Fluid viscous damper in mitigation of structural vibration effect due to underground blast

Centrifuge Characterization of Buried, Explosive-Induced Soil Ejecta Kinematics and Crater Morphology

Contact Info

Product

Resources

About