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- Title
Untersuchung der Schutzwirkung von auf Gabionenwänden montierten Leitblechen gegen Explosionen.
- Authors
Xiao, Weifang; Andrae, Matthias; Gebbeken, Norbert
- Abstract
Investigations of the blast mitigation effect of blast walls with a canopy on top This study shows experimental and numerical investigations on the effectiveness of various blast wall configurations in mitigating the blast loads. The blast walls are composed of a gabion wall with a canopy made of metal sheets, which is mounted at the top of the gabion wall with different angles of inclination. Three experiments were conducted for each configuration. Numerical models are developed and validated against the experimental data. For reasons of cost and space, blast walls with a small width (2 m) were tested in the experiments. This leads to the superposition between the vertical air flow over the top of the wall and the horizontal air flow around the sides of the wall behind the wall. This was investigated numerically. Subsequently, long walls, as they are needed in practice, were numerically simulated. Two observations arisen from the studies of blast walls having infinite width. Firstly, the canopies can significantly reduce the intensity of the shock wave behind the blast wall. Secondly, the configuration with a canopy arranged 45° facing the charge shows the best performance in mitigating the blast loads among all three configurations. It offers an overpressure (impulse) reduction ranging from 55.0 % to 86.0 % (from 45.7 % to 63.8 %) at the gauges employed in the experiments, compared to the free field scenario.
- Subjects
BLAST effect; AIR flow; BLAST waves; SHOCK waves; ADVECTION; SHEET metal; STRUCTURAL mechanics
- Publication
Bautechnik, 2021, Vol 98, Issue 5, p365
- ISSN
0932-8351
- Publication type
Article
- DOI
10.1002/bate.202000065