Damage assessment of normal reinforced concrete panels strengthened with polyurea after explosion
Polyurea can effectively improve the anti-blast performance of normal reinforced concrete (NRC) panels. However, there are very limited studies on the damage assessment of polyurea strengthening NRC (PU-NRC) panels after near-field explosion. In this paper, a high-fidelity finite element (FE) model...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522008270 |
| _version_ | 1797986869229649920 |
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| author | Zichao Liu Jun Wu Jun Yu Shilin Xu |
| author_facet | Zichao Liu Jun Wu Jun Yu Shilin Xu |
| author_sort | Zichao Liu |
| collection | DOAJ |
| description | Polyurea can effectively improve the anti-blast performance of normal reinforced concrete (NRC) panels. However, there are very limited studies on the damage assessment of polyurea strengthening NRC (PU-NRC) panels after near-field explosion. In this paper, a high-fidelity finite element (FE) model of PU-NRC panel was developed and validated by the results from near-field explosion and static loading tests. Subsequently, the deterioration of the bearing capacity was selected as a damage criterion to assess the damage of the PU-NRC panel after explosion. The impacts of polyurea thickness, panel thickness, compressive strength of concrete and longitudial reinforcement ratio on the damage levels of the PU-NRC panel were further discussed. Finally, the empirical formulas of P-I diagram were developed to assess the damage level of the PU-NRC panel after varied blast loads. The results showed that spraying polyurea can improve the stiffness of NRC panel under blast load. In addition, the closer the standoff distance, the better the strengthening effectiveness of polyurea. Increasing polyurea thickness was more effective to increase the value of overpressure asymptote, and spraying polyurea had little contribution to improve the shear resistance of the NRC panel. This research has significant implications for practitioners and scholars in protective engineering. |
| first_indexed | 2024-04-11T07:39:49Z |
| format | Article |
| id | doaj.art-93fd76bcbb1f40f59b7baab30b6dfc89 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-11T07:39:49Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-93fd76bcbb1f40f59b7baab30b6dfc892022-12-22T04:36:38ZengElsevierCase Studies in Construction Materials2214-50952022-12-0117e01695Damage assessment of normal reinforced concrete panels strengthened with polyurea after explosionZichao Liu0Jun Wu1Jun Yu2Shilin Xu3School of Urban Rail Transportation, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Urban Rail Transportation, Shanghai University of Engineering Science, Shanghai 201620, China; Corresponding authors.Engineering Research Center of Safety and Protection of Explosion & Impact of Ministry of Education, Southeast University, Nanjing 211189, China; Corresponding authors.Shanghai Dragon Industrial Engineering Co. Ltd., Shanghai 200122, ChinaPolyurea can effectively improve the anti-blast performance of normal reinforced concrete (NRC) panels. However, there are very limited studies on the damage assessment of polyurea strengthening NRC (PU-NRC) panels after near-field explosion. In this paper, a high-fidelity finite element (FE) model of PU-NRC panel was developed and validated by the results from near-field explosion and static loading tests. Subsequently, the deterioration of the bearing capacity was selected as a damage criterion to assess the damage of the PU-NRC panel after explosion. The impacts of polyurea thickness, panel thickness, compressive strength of concrete and longitudial reinforcement ratio on the damage levels of the PU-NRC panel were further discussed. Finally, the empirical formulas of P-I diagram were developed to assess the damage level of the PU-NRC panel after varied blast loads. The results showed that spraying polyurea can improve the stiffness of NRC panel under blast load. In addition, the closer the standoff distance, the better the strengthening effectiveness of polyurea. Increasing polyurea thickness was more effective to increase the value of overpressure asymptote, and spraying polyurea had little contribution to improve the shear resistance of the NRC panel. This research has significant implications for practitioners and scholars in protective engineering.http://www.sciencedirect.com/science/article/pii/S2214509522008270Normal reinforced concretePolyureaNear-field explosionBearing capacityNumerical simulationDamage assessment |
| spellingShingle | Zichao Liu Jun Wu Jun Yu Shilin Xu Damage assessment of normal reinforced concrete panels strengthened with polyurea after explosion Case Studies in Construction Materials Normal reinforced concrete Polyurea Near-field explosion Bearing capacity Numerical simulation Damage assessment |
| title | Damage assessment of normal reinforced concrete panels strengthened with polyurea after explosion |
| title_full | Damage assessment of normal reinforced concrete panels strengthened with polyurea after explosion |
| title_fullStr | Damage assessment of normal reinforced concrete panels strengthened with polyurea after explosion |
| title_full_unstemmed | Damage assessment of normal reinforced concrete panels strengthened with polyurea after explosion |
| title_short | Damage assessment of normal reinforced concrete panels strengthened with polyurea after explosion |
| title_sort | damage assessment of normal reinforced concrete panels strengthened with polyurea after explosion |
| topic | Normal reinforced concrete Polyurea Near-field explosion Bearing capacity Numerical simulation Damage assessment |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522008270 |
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