By S. F. Son, A. J. Zakrajsek, E. J. Miklaszewski, D. E. Kittell (auth.), Arun Shukla, Yapa D. S. Rajapakse, Mary Ellen Hynes (eds.)

Blast Mitigation: Experimental and Numerical Studies covers either experimental and numerical features of fabric and structural reaction to dynamic blast lots and its mitigation. The authors current the main updated realizing from laboratory reports and computational research for researchers operating within the box of blast loadings and their impression on fabric and structural failure, enhance designs for lighter and hugely effective structural participants for blast power absorption, speak about vulnerability of underground constructions, current tools for dampening blast overpressures, speak about structural submit blast cave in and provides awareness to underwater explosion and implosion results on submerged infrastructure and mitigation measures for this environment.

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Sand). At low pressures, the grain scale simulation results agree with the effective stress model predictions, but deviate significantly at high pressures. The development of improved modeling capabilities for saturated geologic materials is fertile ground for future research. An approach which combines grain scale simulations with experimental observations to elucidate the deformation mechanisms, leading to the development of a constitutive model that captures the main features of the material response, seems particularly promising and is being actively pursued.

For this reason, the ability to accurately simulate the propagation of stress waves in geologic media, and the interaction of those waves with buried structures is of significant importance in assessing tunnel vulnerability and associated mitigation strategies. This requires the use of constitutive and failure 2 Application of High Performance Computing to Rapid Assessment of Tunnel… 25 models that capture the behavior of geologic materials under dynamic loading conditions. , Rubin et al. 2000).

It is notable that the pressures could be significantly higher if the explosion were tamped by the presence of a train or other large object located near the charge. The severity and extent of personnel injuries along the tunnel, as well as in the stations and drifts, can be estimated by using fragility curves of Bowen et al. (1968) relating human survivability to the peak overpressure and duration of exposure to the blast overpressure as plotted in Fig. 16. Survivability estimates are evaluated at the same target points specified for the pressure time histories (refer to Fig.

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