Experimental and analytical study on blast resistance performance of brick infill walls strengthened with polyuria

XU Linfeng; CHEN Li; LI Zhan; YUE Chengjun

doi:10.11883/bzycj-2021-0332

Volume 42 Issue 7

Jul. 2022

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XU Linfeng, CHEN Li, LI Zhan, YUE Chengjun. Experimental and analytical study on blast resistance performance of brick infill walls strengthened with polyuria[J]. Explosion And Shock Waves, 2022, 42(7): 075102. doi: 10.11883/bzycj-2021-0332

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XU Linfeng, CHEN Li, LI Zhan, YUE Chengjun. Experimental and analytical study on blast resistance performance of brick infill walls strengthened with polyuria[J]. Explosion And Shock Waves, 2022, 42(7): 075102. doi: 10.11883/bzycj-2021-0332

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Experimental and analytical study on blast resistance performance of brick infill walls strengthened with polyuria

doi: 10.11883/bzycj-2021-0332

XU Linfeng^1
,,
CHEN Li^{1
,
,},
LI Zhan²,
YUE Chengjun¹

1.
Engineering Research Center of Safety and Protection of Explosion & Impact of Ministry of Education, Southeast University, Nanjing 211189, Jiangsu, China
2.
Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

Received Date: 2021-08-09
Rev Recd Date: 2021-09-22

Available Online: 2022-06-17

Publish Date: 2022-07-25

Abstract

Abstract

In order to study the blast-resistance characteristics of polyurea sprayed reinforced brick infill walls, a prototype explosion test of polyurea sprayed reinforced frame infill walls was carried out based on an improved large-scale explosion test device. This test device eliminates the influence of the sparse wave formed by the air shock wave at the edge of the wall and the diffraction behind the wall on the real blast resistance test dynamic response of the wall, and significantly improves the accuracy of the blast resistance test of brick infill walls strengthened with polyuria. The dynamic response characteristics, failure process and mode of reinforced brick walls under explosion load were analyzed, and the failure mechanism was revealed. The results show that under small deformation conditions, polyurea reinforcement can improve the blast-resistance of infilled wall members. Under large deformation conditions, polyurea reinforcement can increase the ductility of filled wall members. The system stiffness of reinforced brick wall changes continuously during forced vibration, and the maximum difference is 133%. With the decrease of the proportional distance, the failure mode of the reinforced brick wall gradually changes from bending failure to shear failure. The polyurea thickness of more than 6 mm can effectively limit the local shear failure phenomenon. The theoretical calculation model based on the resistance function of brick wall and polyurea coating can accurately predict the forward displacement response process of two-way brick wall reinforced by back blasting surface under explosion.
- polyuria,
- brick wall,
- blast-resistance test,
- system stiffness,
- resistance function

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References(25)

References

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