Abstract
This paper describes three blast-loading trials on three kinds of steel tubular structural components at the same explosive charge and standoff distance. Specimen one is a hollow steel tube (HST), another is a HST wrapped with glass fibre-reinforced plastic (GFRP) with epoxy resin and the third is a HST infilled with concrete. The main objective of the trials is to investigate the effect of near-field detonations on circular steel tubular components. The experimental data, such as the overpressure time history, front local deformation, rear residual deflection and strain time history, are all recorded and collected. Analysis of the trial results shows that the experimental peak overpressure values of shot 1–3 are all larger than that of numerical simulation. The failure of these three specimens mainly experiences local damage, at the same time, the HST and HST with GFRP exhibit obvious global deformation. With the initiation point at one end of the cylinder explosive, both the maximum depth deformation on the front surface and the maximum residual deflection on the rear surface are all located on the side of the another end of the cylinder explosive. The blast-resistant approach by covering 10-layer GFRP on the surface of the HST can reduce the local damage, the global deformation and the dynamic strain value to certain extent, while the approach by infilling the steel tube with concrete can greatly decrease the local damage and the dynamic strain value and without any global deformation.
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Acknowledgments
The authors wish to gratefully acknowledge the following organizations for their support in this study: The National Natural Science Foundation of China (Grant 51408558), Shanxi Youth Science and Technology Research Fund (Grant 201601D202005) and Applied Basic Research Program of Shanxi Province (Grant 201801D221233) for financial support; Profession Daihua Wang team from School of Instrument and Electronics of the North University of China for assistance with the overpressure test; Taiyuan Yulei Premixed Concrete Co., Ltd. for providing concrete raw materials; Taishan Glass Fiber Zoucheng Co., Ltd. for supplying glass fibre-reinforced plastics. Finally, many thanks go to Donghua Testing Technology Co., Ltd. and Wuhan Utkel Electronic Technology Co., Ltd. for technical assistance with the strain test.
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Wang, W., Geng, S., Wang, H. et al. Experimental Study on the Damage of Steel Tubular Structural Components by Near-Field Detonations. KSCE J Civ Eng 25, 529–539 (2021). https://doi.org/10.1007/s12205-020-2291-4
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DOI: https://doi.org/10.1007/s12205-020-2291-4