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Effect of Spraying Polyurea on the Anti-Blast Performance of the Ultra-High Performance Concrete Slab
Recently, polyurea has been applied to improve the anti-blast performance of metal plates, masonry walls, and concrete structures. However, the strengthening effectiveness of polyurea on ultra-high performance concrete (UHPC) slabs with an overall response is still unclear. Hence, this paper examine...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9784008/ https://www.ncbi.nlm.nih.gov/pubmed/36560255 http://dx.doi.org/10.3390/s22249888 |
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author | Gao, Bin Wu, Jun Chen, Qinyi Yu, Jun Yu, Haitao |
author_facet | Gao, Bin Wu, Jun Chen, Qinyi Yu, Jun Yu, Haitao |
author_sort | Gao, Bin |
collection | PubMed |
description | Recently, polyurea has been applied to improve the anti-blast performance of metal plates, masonry walls, and concrete structures. However, the strengthening effectiveness of polyurea on ultra-high performance concrete (UHPC) slabs with an overall response is still unclear. Hence, this paper examined the strengthening effectiveness of polyurea on the anti-blast performance of UHPC slabs under near-field explosion by the finite element (FE) method. First, a benchmark finite element model for UHPC and polyurea-UHPC (PUHPC) slabs under blast loading was established and validated by field blast tests, with scaled distances ranging from 0.4 m/kg(1/3) to 0.8 m/kg(1/3). After that, parametric analysis was conducted to fully understand the strengthening effectiveness of polyurea on the anti-blast performance of the UHPC slab. Factors including the scaled distance, polyurea thickness, span-to-depth ratio of the slab, and longitudinal reinforcement ratio were considered. The results showed that (1) spraying polyurea on the rear face of the UHPC slab can reduce the width of cracks and mitigate the damage of specimens; (2) the strengthening effectiveness of polyurea on the UHPC slab became prominent when the UHPC slab suffered a larger maximum deflection; (3) in terms of the deflection and energy absorption capacity of PUHPC slabs, the optimum thickness of sprayed polyurea was determined to be 8 mm to 12 mm; and (4) by adopting the multiple nonlinear regression method, a prediction formula was developed to quickly obtain the end rotation of the UHPC slab strengthened with polyurea under near-field explosions. |
format | Online Article Text |
id | pubmed-9784008 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-97840082022-12-24 Effect of Spraying Polyurea on the Anti-Blast Performance of the Ultra-High Performance Concrete Slab Gao, Bin Wu, Jun Chen, Qinyi Yu, Jun Yu, Haitao Sensors (Basel) Article Recently, polyurea has been applied to improve the anti-blast performance of metal plates, masonry walls, and concrete structures. However, the strengthening effectiveness of polyurea on ultra-high performance concrete (UHPC) slabs with an overall response is still unclear. Hence, this paper examined the strengthening effectiveness of polyurea on the anti-blast performance of UHPC slabs under near-field explosion by the finite element (FE) method. First, a benchmark finite element model for UHPC and polyurea-UHPC (PUHPC) slabs under blast loading was established and validated by field blast tests, with scaled distances ranging from 0.4 m/kg(1/3) to 0.8 m/kg(1/3). After that, parametric analysis was conducted to fully understand the strengthening effectiveness of polyurea on the anti-blast performance of the UHPC slab. Factors including the scaled distance, polyurea thickness, span-to-depth ratio of the slab, and longitudinal reinforcement ratio were considered. The results showed that (1) spraying polyurea on the rear face of the UHPC slab can reduce the width of cracks and mitigate the damage of specimens; (2) the strengthening effectiveness of polyurea on the UHPC slab became prominent when the UHPC slab suffered a larger maximum deflection; (3) in terms of the deflection and energy absorption capacity of PUHPC slabs, the optimum thickness of sprayed polyurea was determined to be 8 mm to 12 mm; and (4) by adopting the multiple nonlinear regression method, a prediction formula was developed to quickly obtain the end rotation of the UHPC slab strengthened with polyurea under near-field explosions. MDPI 2022-12-15 /pmc/articles/PMC9784008/ /pubmed/36560255 http://dx.doi.org/10.3390/s22249888 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Gao, Bin Wu, Jun Chen, Qinyi Yu, Jun Yu, Haitao Effect of Spraying Polyurea on the Anti-Blast Performance of the Ultra-High Performance Concrete Slab |
title | Effect of Spraying Polyurea on the Anti-Blast Performance of the Ultra-High Performance Concrete Slab |
title_full | Effect of Spraying Polyurea on the Anti-Blast Performance of the Ultra-High Performance Concrete Slab |
title_fullStr | Effect of Spraying Polyurea on the Anti-Blast Performance of the Ultra-High Performance Concrete Slab |
title_full_unstemmed | Effect of Spraying Polyurea on the Anti-Blast Performance of the Ultra-High Performance Concrete Slab |
title_short | Effect of Spraying Polyurea on the Anti-Blast Performance of the Ultra-High Performance Concrete Slab |
title_sort | effect of spraying polyurea on the anti-blast performance of the ultra-high performance concrete slab |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9784008/ https://www.ncbi.nlm.nih.gov/pubmed/36560255 http://dx.doi.org/10.3390/s22249888 |
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