The effect of spherical air blast on buried pipelines: A laboratory simulation study

Vivek, P and Sitharam, TG (2018) The effect of spherical air blast on buried pipelines: A laboratory simulation study. In: International Journal of Physical Modelling in Geotechnics, 18 (2). pp. 57-67.

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Abstract

A new laboratory-scale experimental technique has been developed to study the blast wave effects on buried pipelines caused by an explosion at an altitude. A shock tube is used in this study to generate a blast wave in a controlled and repeatable manner, without the use of any explosives. The blast wave profile generated is characterised by peak reflected pressure and positive phase duration and is represented using tri-nitro-Toluene equivalents. Shock tube experiments have been carried out on a reduced-scale pipe model in a sand deposit. The momentum transfer from the blast wave to the sand bed is indicated by the presence of compression stress waves. It is demonstrated from the experiments that the shock tube is an effective and versatile tool for investigating the interactions of blast wave with the buried structures. Using the dimensional analysis procedure, shock tube experimental results are scaled up to predict the real-scale damage imparted to the buried pipes during a spherical air-burst explosion. In addition, a three-dimensional finite-element analysis of the test condition is performed to investigate the fidelity of the scaling laws.

Item Type:	Journal Article
Publication:	International Journal of Physical Modelling in Geotechnics
Publisher:	ICE Publishing
Additional Information:	The copyright for this article belongs to the ICE Publishing.
Keywords:	Dynamics; Explosives; Granular materials; Laboratories; Pipelines; Shock tubes, Buried structure; Compression stress; Dimensional analysis; Experimental techniques; Laboratory simulation studies; Reflected pressure; Shock tube experiment; Three dimensional finite element analysis, Finite element method, buried structure; compression; computer simulation; dynamic analysis; finite element method; granular medium; laboratory method; pipeline; sphere
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	10 Aug 2022 04:45
Last Modified:	10 Aug 2022 04:45
URI:	https://eprints.iisc.ac.in/id/eprint/75639

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