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Experimental and Numerical Investigations of Shock Wave Attenuation Effects Using Protective Barriers Made of Steel Posts
| 题名： | Experimental and Numerical Investigations of Shock Wave Attenuation Effects Using Protective Barriers Made of Steel Posts |
| 其他题名： | Abe,A.,and K.Takayama.2001."Attenuation of shock waves propagating over arrayed spheres."In Proc.,SPIE 4183,582-589.Washington,DC:International Society for Optical Engineering. |
| 正文语种： | 英文 |
| 作者： | Weifang Xiao |
| 关键词： | Protective barrier;Post;Hollow section;Shock wave attenuation;Overpressure;Impulse;Multimaterial arbitrary- Lagrangian-Eulerian;Fluid-structure interaction |
| 摘要： | The use of protective barriers is one of the most common approaches to protect buildings and their occupants against blast and vehicle impacts. They increase the stand-off distance between the explosive source and the building. However, the protection capabilities of barriers with openings have not yet been thoroughly studied. The present paper discusses the shock wave attenuation effect of protective barriers made of steel posts with a hollow cross section. In the experiments, the steel posts are located at a distance of 5 m to the building to be protected. Prior to the experiments, numerical models were developed to predict the blast loads numerically. Overpressure-time history measurements (side-on and reflected) were made at various distances in front of and behind the barrier. The experimental data were used to, for example, validate the numerical models. The experimental and numerical results showed that barriers can reduce the blast loads relative to the scenario in which no barriers were present. Considerable reductions in peak side-on and reflected overpressure and impulse were observed behind the barriers. Furthermore, after validation, parametric studies are carried out to investigate the influence of further parameters on the overpressure reduction behind the barriers, that is, the number of posts or the spacing between posts, the cross-sectional shapes of posts, and the arrangement of posts (single-layer or multilayer, aligned or staggered). These studies showed that a barrier without openings is not always necessary to offer the desired protection because barriers with openings can also show satisfactory results. Hence, the necessary amount of material (steel in this case) and, thus, the construction cost can be considerably reduced. |
| 出版年： | 2018 |
| 论文唯一标识： | P-26Y2018V144N11007 |
| 英文栏目名称： | TECHNICAL PAPERS |
| doi： | 10.1061/(ASCE)ST.1943-541X.0002194 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 144 |
| 期： | 11 |
| 页码： | 65-87 |
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