Fluid-structure interactions for the air blast loading of elastomer-coated concrete.
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| Title: | Fluid-structure interactions for the air blast loading of elastomer-coated concrete. |
|---|---|
| Authors: | Fallon, C.1 (AUTHOR) cf335@cam.ac.uk, McShane, G.J.1 (AUTHOR) gjm31@cam.ac.uk |
| Source: | International Journal of Solids & Structures. Aug2019, Vol. 168, p138-152. 15p. |
| Subjects: | Fluid-structure interaction, Blast effect, Concrete, Concrete slabs, Air, Elastomers |
| Abstract: | The fluid-structure interaction (FSI) effect experienced by an elastomer-coated concrete slab subjected to blast loading in air is studied numerically. The aim is to establish whether a flexible coating alters blast-structure interactions and whether this can explain the apparent blast mitigating capability of this retrofit solution as reported in published experimental investigations. Numerical models for a typical concrete and spray-on elastomer coating are established and a Coupled Eulerian–Lagrangian (CEL) model is employed to predict the air blast response. A 1D FSI analysis suggests that the elastomer coating increases the peak compressive stress in the concrete during short timescale pressure wave interactions. But the effect on the total imparted momentum is small, across a range of target mass and blast intensity. However, due to momentum sharing, the impulse imparted to the concrete plate is reduced in the coated configuration. By extending the analysis into 2D, it is found that the displacement of a concrete slab is marginally reduced when coated on either the blast-receiving or non-blast-receiving face. Thus, it is postulated that the elastomer contributes a small, beneficial mechanical effect. Finally, the need for a fully coupled (CEL) approach to model the blast-structure interaction is interrogated. For a wide range of cases, the results suggest that using a purely Lagrangian approach, in which a pressure-time history is directly applied to the structure (thereby neglecting full representation of FSI effects), is sufficient to capture the deflection behaviour of coated concrete plates. However, it is shown that the significance of the error associated with this simplification depends on the blast intensity and slab geometry under consideration. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Solids & Structures is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 136182414 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Fluid-structure interactions for the air blast loading of elastomer-coated concrete. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Fallon%2C+C%2E%22">Fallon, C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> cf335@cam.ac.uk</i><br /><searchLink fieldCode="AR" term="%22McShane%2C+G%2EJ%2E%22">McShane, G.J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> gjm31@cam.ac.uk</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Solids+%26+Structures%22">International Journal of Solids & Structures</searchLink>. Aug2019, Vol. 168, p138-152. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Fluid-structure+interaction%22">Fluid-structure interaction</searchLink><br /><searchLink fieldCode="DE" term="%22Blast+effect%22">Blast effect</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete%22">Concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete+slabs%22">Concrete slabs</searchLink><br /><searchLink fieldCode="DE" term="%22Air%22">Air</searchLink><br /><searchLink fieldCode="DE" term="%22Elastomers%22">Elastomers</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The fluid-structure interaction (FSI) effect experienced by an elastomer-coated concrete slab subjected to blast loading in air is studied numerically. The aim is to establish whether a flexible coating alters blast-structure interactions and whether this can explain the apparent blast mitigating capability of this retrofit solution as reported in published experimental investigations. Numerical models for a typical concrete and spray-on elastomer coating are established and a Coupled Eulerian–Lagrangian (CEL) model is employed to predict the air blast response. A 1D FSI analysis suggests that the elastomer coating increases the peak compressive stress in the concrete during short timescale pressure wave interactions. But the effect on the total imparted momentum is small, across a range of target mass and blast intensity. However, due to momentum sharing, the impulse imparted to the concrete plate is reduced in the coated configuration. By extending the analysis into 2D, it is found that the displacement of a concrete slab is marginally reduced when coated on either the blast-receiving or non-blast-receiving face. Thus, it is postulated that the elastomer contributes a small, beneficial mechanical effect. Finally, the need for a fully coupled (CEL) approach to model the blast-structure interaction is interrogated. For a wide range of cases, the results suggest that using a purely Lagrangian approach, in which a pressure-time history is directly applied to the structure (thereby neglecting full representation of FSI effects), is sufficient to capture the deflection behaviour of coated concrete plates. However, it is shown that the significance of the error associated with this simplification depends on the blast intensity and slab geometry under consideration. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Solids & Structures is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.ijsolstr.2019.03.017 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 138 Subjects: – SubjectFull: Fluid-structure interaction Type: general – SubjectFull: Blast effect Type: general – SubjectFull: Concrete Type: general – SubjectFull: Concrete slabs Type: general – SubjectFull: Air Type: general – SubjectFull: Elastomers Type: general Titles: – TitleFull: Fluid-structure interactions for the air blast loading of elastomer-coated concrete. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Fallon, C. – PersonEntity: Name: NameFull: McShane, G.J. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 08 Text: Aug2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 00207683 Numbering: – Type: volume Value: 168 Titles: – TitleFull: International Journal of Solids & Structures Type: main |
| ResultId | 1 |
