Evaluating long duration blast loads on steel columns using computational fluid dynamics.pdf (2.97 MB)

Evaluating long-duration blast loads on steel columns using computational fluid dynamics

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journal contribution
posted on 19.02.2019 by Jack Denny, Simon Clubley
Long-duration blasts are typically defined by positive pressure durations exceeding 100ms (Denny & Clubley, 2019; Johns & Clubley, 2016). Such blasts can generate dynamic pressures (blast winds) capable of exerting damaging drag loads on comparatively slender structural components such as columns. With limited drag coefficient availability for specific structural geometries, Computational Fluid Dynamics (CFD) can be the only satisfactory approach for analysing blast loading on user-specified, finite geometries. The ability to analyse long-duration blasts with commercially available CFD programs is still not confidently offered, with no prior studies examining the accuracy of modelling interaction with relatively much smaller, finite geometries. This paper presents a comparative investigation between numerical and experimental results to assess the predictive capacity of inviscid Eulerian CFD as a method for calculating long-duration blast drag loading on finite cross-section geometries. Full-scale long-duration blast experiments successfully measured surface pressure-time histories on a steel I-section column aligned at four orientations. Calculated pressure-time histories on exposed geometry surfaces demonstrated good agreement although reduced accuracy and under-prediction occurred on shielded surfaces manifesting as overestimated net loading. This study provides new understanding and awareness of the numerical capability and limitations of using CFD to calculate long-duration blast loads on intricate geometries.

Funding

The authors wish to thank the UK EPSRC and AWE plc for financial support.

History

School

  • Architecture, Building and Civil Engineering

Published in

Structure and Infrastructure Engineering

Volume

15

Issue

11

Pages

1419 - 1435

Citation

DENNY, J.W. and CLUBLEY, S.K., 2019. Evaluating long-duration blast loads on steel columns using computational fluid dynamics. Structure and Infrastructure Engineering, 15 (11), pp.1419-1435.

Publisher

Taylor & Francis (Routledge) © Crown Owned Copyright

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/

Acceptance date

10/02/2019

Publication date

2019-07-05

Notes

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

ISSN

1573-2479

Language

en

Licence

Exports