Determination of the Attenuation Factor of Sand Using a Vertical Shock Tube

Mondal, SK and Rekapalli, M and Paunikar, S and Kumar, CS and Jagadeesh, G (2023) Determination of the Attenuation Factor of Sand Using a Vertical Shock Tube. In: 2023 Geo-Congress: Sustainable Infrastructure Solutions from the Ground Up - Geotechnics of Natural Hazards, 26 - 29 March 2023, Los Angeles, pp. 21-28.

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Abstract

The vibrations induced in the ground due to the propagation of high amplitude pressure waves generated during blasts pose a serious danger to structures on the ground and underground. In this paper, we explore the attenuation behaviour of sand subjected to blast waves generated in a vertical shock tube driven by compressed helium gas. Peak pressure, decay time, and impulse of the blast wave profile have been used to compare different blast profiles generated in the laboratory. Pressure sensors are embedded at a number of locations in the test section to note the pressure profiles in the air and sand column. In order to study the effect of compaction on attenuation, sand compacted at different relative densities is subjected to blast waves of various overpressures, and the attenuation factor is estimated. This study shows that shock tubes can be effectively used to understand the behaviour of attenuation characteristics of sand under blast loads.

Item Type:	Conference Paper
Publication:	Geotechnical Special Publication
Publisher:	American Society of Civil Engineers (ASCE)
Additional Information:	The copyright for this article belongs to American Society of Civil Engineers (ASCE).
Keywords:	Shock tubes, Attenuation factors; Blast waves; Decay time; Helium gas; High amplitudes; Peak pressure; Pressure decay; Pressure waves; Vertical shock tubes; Wave profiles, Sand
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering) Division of Mechanical Sciences > Civil Engineering
Date Deposited:	25 May 2023 07:49
Last Modified:	16 Jun 2023 08:35
URI:	https://eprints.iisc.ac.in/id/eprint/81527

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