Blast Impact On Structures Of
Underground Parking
Author(s)
P. P. Procházka, A. N. Kravtsov & S. Peskova
Abstract
In big cities underground spaces are built up for subways, underground parking
and tunnels, etc. These rooms are threatened by terrorist attacks and not only
human lives can be lost but also extensive material damage can be expected. This
is why it is of great importance to predict dynamic impacts of explosives, which
can then be transformed to static statistically evaluated loading. In this paper the
impact of explosion and air strike wave is formulated and solved. Gas dynamics
and dynamic response of soil with process of dissipation of air-strike energy are
considered. This means that some part of this energy is transferred into structures
and soil mass. It appears that for contact explosions on the soil surface this part
can be up to 30% of the total explosion energy (in soft soils). The variables to be
calculated are mass density of gas, the velocity of movements and the internal
energy. The latter covers the influence of the gas pressure, being given for the
adiabatic state. The air is linearly related to the internal energy of a unit mass of
the gas, and the density, while in the neighborhood of the source of explosion the
pressure changes nonlinearly with respect to the gas density. Time dependent
finite element solution is compared with results published in Lucy, L.B. (1977).
A numerical approach to testing of the fission hypothesis. Astron. J. 82, 1013.
Keywords: underground parking, striking wave due to explosion, time
development of gas pressure, impact load.
1 Introduction
Numerical simulation of gas explosion is very particular as the system of
equations describing the process are nonlinear and of the first order. Moreover,
Keywords
underground parking, striking wave due to explosion, time
development of gas pressure, impact load.
Related Book
Other papers in this volume
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