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We test our simplified and improved boundary treatment for Euler equations with or without source terms representing chemical reactions in detonations.
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In the present study, field blast tests results on reinforced concrete slabs under close-in detonations are presented.
Under close-in detonations, structural elements tend to fail in a brittle mode including shear, concrete crater and spall.
Field blast tests are designed to study the behaviour of reinforced concrete slabs under close-in detonations.
The blast scenarios involving close-in detonations are attracting increasingly more attentions over the last few decades due to the rising of terrorism.
The effects of close-in detonations of high explosives are characterized in terms of incident and reflected overpressures and impulses.
Close-in detonations lead to high intensity concentrated loads which can cause a premature brittle punching failure of the member.
The scaled distance ranged from 0.41 m/ kg)1/3 to 0.57 m/ kg)1/3 and hence the tests are close-in detonations.
This experimental program has produced results which can be used to calibrate numerical models and to refine the simplified models for predicting blast loads and response of structural elements due to close-in detonations.
Calculations are performed to verify the code in 1D, estimate blast effects using 1D models, predict incident overpressures and impulses in the near field, provide guidance on the use of reflecting and transmitting boundaries in 2D and 3D models, provide recommendations on cell size, and predict reflected overpressures on a rigid reflecting surface for close-in detonations.
PETN is a major ingredient of the plastic explosive Semtex and is used in detonation cables.
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