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Establishing a predictive method for blast induced masonry debris distribution using experimental and numerical methods

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journal contribution
posted on 03.09.2018, 13:21 by Richard A. Keys, Simon Clubley
When subjected to blast loading, fragments ejected by concrete or masonry structures present a number of potential hazards. Airborne fragments pose a high risk of injury and secondary damage, with the resulting debris field causing major obstructions. The capability to predict the spatial distribution of debris of any structure as a function of parameterised blast loads will offer vital assistance to both emergency response and search and rescue operations and aid improvement of preventative measures. This paper proposes a new method to predict the debris distribution produced by masonry structures which are impacted by blast. It is proposed that describing structural geometry as an array of simple modular panels, the overall debris distribution can be predicted based on the distribution of each individual panel. Two experimental trials using 41 kg TNT equivalent charges, which subjected a total of nine small masonry structures to blast loading, were used to benchmark a computational modelling routine using the Applied Element Method (AEM). The computational spatial distribution presented good agreement with the experimental trials, closely matching breakage patterns, initial fragmentation and ground impact fragmentation. The collapse mechanisms were unpredictable due to the relatively low transmitted impulse; however, the debris distributions produced by AEM models with matching collapse mechanisms showed good agreement with the experimental trials.

Funding

Funding for analytical research has been gratefully provided by EPSRC Grant: EP/M009254/1.

History

School

  • Architecture, Building and Civil Engineering

Published in

Engineering Failure Analysis

Volume

82

Pages

82 - 91

Citation

KEYS, R.A. and CLUBLEY, S.K., 2017. Establishing a predictive method for blast induced masonry debris distribution using experimental and numerical methods. Engineering Failure Analysis, 82, pp.82-91.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

05/07/2017

Publication date

2017-07-19

Notes

This paper was published in the journal Engineering Failure Analysis and the definitive published version is available at https://doi.org/10.1016/j.engfailanal.2017.07.017.

ISSN

1350-6307

Language

en

Exports