首页|Explosion resistance performance of reinforced concrete box girder coated with polyurea:Model test and numerical simulation

Explosion resistance performance of reinforced concrete box girder coated with polyurea:Model test and numerical simulation

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To study the anti-explosion protection effect of polyurea coating on reinforced concrete box girder,two segmental girder specimens were made at a scale of 1∶3,numbered as G(without polyurea coating)and PCG(with polyurea coating).The failure characteristics and dynamic responses of the specimens were compared through conducting explosion tests.The reliability of the numerical simulation using LS-DYNA software was verified by the test results.The effects of different scaled distances,reinforcement ratios,concrete strengths,coating thicknesses and ranges of polyurea were studied.The results show that the polyurea coating can effectively enhance the anti-explosion performance of the girder.The top plate of middle chamber in specimen G forms an elliptical penetrating hole,while that in specimen PCG only shows a very slight local dent.The peak vertical displacement and residual displacement of PCG decrease by 74.8％and 73.7％,respectively,compared with those of specimen G.For the TNT explosion with small equivalent,the polyurea coating has a more significant protective effect on reducing the size of fracture.With the increase of TNT equivalent,the protective effect of polyurea on reducing girder displacement becomes more significant.The optimal reinforcement ratio,concrete strength,thickness and range of polyurea coating were also drawn.

Explosive loadExplosion resistance performanceModel testPolyureaConcrete box girderNumerical simulation

Guangpan Zhou、Rong Wang、Mingyang Wang、Jianguo Ding、Yuye Zhang

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School of Science,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China

School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China

State Key Laboratory of Explosion and Impact and Disaster Prevention and Mitigation,Army Engineering University of PLA,Nanjing210007,Jiangsu,China

Natural Science Foundation of Jiangsu ProvinceChina Postdoctoral Science FoundationJiangsu Postdoctoral Research Funding ProgramFundamental Research Funds for the Central UniversitiesNational Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu Province

BK202004942021M7017252021K522C3091901124652278188BK20211196

2024

10.1016/j.dt.2023.08.006

防务技术
中国兵工学会

防务技术

CSTPCD
影响因子：0.358
ISSN：2214-9147
年,卷(期)：2024.33(3)
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