Experimental Study on the Damage of Steel Tubular Structural Components by Near-Field Detonations
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pISSN 1226-7988, eISSN 1976-3808 www.springer.com/12205
DOI 10.1007/s12205-020-2291-4
Structural Engineering TECHNICAL NOTE
Experimental Study on the Damage of Steel Tubular Structural Components by Near-Field Detonations Wanyue Wanga, Shaobo Geng b, Hua Wanga, Wenqiang Lic, Yaling Liub, Jianying Xueb, Tingbian Zhana, and Ying Gaob a
College of Mechatronics Engineering, North University of China, Taiyuan 030051, China School of Science, North University of China, Taiyuan 030051, China c School of Information and Communication Engineering, North University of China, Taiyuan 030051, China b
ARTICLE HISTORY
ABSTRACT
Received 19 December 2019 Revised 19 July 2020 Accepted 8 September 2020 Published Online 27 November 2020
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.
KEYWORDS Near-field detonations Steel tube Steel tube with GFRP Steel tube infilled with concrete
1. Introduction It is very often for the buildings, bridges and other infrastructures to be collapsed by the detonation caused by terrorists (Brismar and Bergenwald, 1982; Dumont et al., 2003; Liu, 2009; Li and Wu, 2015). In the actual cases, because the distances between the explosives and components in the structures are always very closer, or the explosives always directly put on the components, the force of the detonation will be greatly enhanced, even a relatively small explosive charge will result in a severe local deformation in the component, which will consequently lead to the collapse of the structures (Anwarul and Yazdani, 2008; Elsanadedy et al., 2014; Pourasil et al., 2017) . Things like this is ca
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