Establishing a predictive method for blast induced masonry debris distribution using experimental and numerical methods
| Autor: | Simon K. Clubley, Richard A. Keys |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Engineering
business.industry Numerical analysis General Engineering Applied element method 020101 civil engineering 02 engineering and technology Structural engineering Masonry Impulse (physics) Debris 0201 civil engineering 020303 mechanical engineering & transports Emergency response 0203 mechanical engineering Breakage General Materials Science Geotechnical engineering TNT equivalent business |
| Popis: | When subjected to blast loading, fragments ejected by concrete or masonry structures present a number of potentialhazards. Airborne fragments pose a high risk of injury and secondary damage, with the resulting debris field causingmajor obstructions. The capability to predict the spatial distribution of debris of any structure as a function ofparameterised blast loads will offer vital assistance to both emergency response and search and rescue operationsand aid improvement of preventative measures. This paper proposes a new method to predict the debris distributionproduced by masonry structures which are impacted by blast. It is proposed that describing structural geometry as anarray of simple modular panels, the overall debris distribution can be predicted based on the distribution of eachindividual panel. Two experimental trials using 41kg TNT equivalent charges, which subjected a total of nine smallmasonry structures to blast loading, were used to benchmark a computational modelling routine using the AppliedElement 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 mechanismswere unpredictable due to the relatively low transmitted impulse; however, the debris distributions produced by AEMmodels with matching collapse mechanisms showed good agreement with the experimental trials. |
| Databáze: | OpenAIRE |
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