Performance of retrofitted autoclaved aerated concrete masonry walls subjected to gas explosions

PENG Pei; LI Zhan; ZHANG Yadong; CHEN Li; FANG Qin

doi:10.11883/bzycj-2018-0252

Volume 40 Issue 3

Mar. 2020

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PENG Pei, LI Zhan, ZHANG Yadong, CHEN Li, FANG Qin. Performance of retrofitted autoclaved aerated concrete masonry walls subjected to gas explosions[J]. Explosion And Shock Waves, 2020, 40(3): 035101. doi: 10.11883/bzycj-2018-0252

Citation:

PENG Pei, LI Zhan, ZHANG Yadong, CHEN Li, FANG Qin. Performance of retrofitted autoclaved aerated concrete masonry walls subjected to gas explosions[J]. Explosion And Shock Waves, 2020, 40(3): 035101. doi: 10.11883/bzycj-2018-0252

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Performance of retrofitted autoclaved aerated concrete masonry walls subjected to gas explosions

doi: 10.11883/bzycj-2018-0252

PENG Pei^1
,,
LI Zhan^{1
,
,},
ZHANG Yadong²,
CHEN Li²,
FANG Qin¹

1.
State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, Army Engineering University, Nanjing 210007, Jiangsu, China
2.
Engineering Research Center of Safety and Protection of Explosion & Impact of Ministry of Education, Southeast University, Nanjing 211189, Jiangsu, China

Received Date: 2018-07-10
Rev Recd Date: 2019-11-03

Available Online: 2020-02-25

Publish Date: 2020-03-01

Abstract

Abstract

Numerical studies were conducted by using the finite element software LS-DYNA to investigate the performances of the retrofitted autoclaved aerated concrete masonry (AAC) walls subjected to gas explosions. A simplified numerical model for the masonry walls was developed and calibrated with the test data. Under the blast loads specified by the design codes, the influences of wall height and thickness on the structural response of the unstrengthened one-way AAC masonry walls were discussed. In addition, the performances of the BFRP strip and spray-on polyurea strengthened one-way AAC masonry walls were compared and the retrofitting suggestions for engineering practice were proposed. It is found that the numerical predications of the mid-span displacements and failure modes are in agreement with the test data. Under the specified blast loads, the unstrengthened masonry walls mainly fail for bending of the structures, and with the increase of wall height, the failure mode changes from flexure failure to shear failure. Using the BFRP strips can improve the stiffness and arching effect of the walls significantly while the spray-on polyurea can enhance the tensile membrane effect of walls effectively. The failure mode of the strengthened masonry walls is a typical flexure failure. The fracture of the BFRP strips generally occurs at the mid-span area of the one-way masonry walls, while the fracture of spray-on polyurea occurs at the boundary of the masonry walls.
- gas explosion,
- autoclaved aerated concrete,
- masonry wall,
- BFRPstrip,
- spray-on polyurea

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References(30)

References

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