Effect of shock wave on fabricated anti-blast wall and distribution law around the wall under near surface explosion

Abstract

The loads of shock wave effect on fabricated anti-blast wall and distribution law around the wall were investigated by using near surface explosion test method and FEM. The pressure-time histories and variety law on the foreside and backside of the anti-blast wall were adopted in the tests of variety of different explosion distances and dynamites, as well as in the comparison between the test and numerical calculation. The test results show that the loads of shock wave effect on the anti-blast wall were essen-tially consistent with calculation results using criterion under surface explosion when explosion distances exceed 2 m, the distribution of overpressure behind wall was gained according to variety law based on small-large-small. It is also demonstrated that the peak overpressure behind wall had commonly appeared in wall height by 1.5–2.5 multiples, and the peak overpressures of protective building behind wall could be reduced effectively by using the fabricated anti-blast wall.

Keywords

anti-blast wall / near surface explosion / overpressure / shock wave

References

[1] Liu Fei, Ren Huiqi, Wang Xiaojun et al. The role of the antiblast wall in protecting the important ground building against the blast terror attack[J]. Protective Engineering, 2004(6): 20–25.

[2] Yan Dongjin, Ding Nana, Chen Chanshou et al. Classification and the relative problems of the antiblast wall outside the building[J]. Protective Engineering, 2006(2) 68–74.

[3] Coltharp D. R.. Mitigating damage from vehicle bombs[J]. Military Engineer, 1997, 89(8): 27-28.

[4] Patricia K Bowles. Barrier assessment for safe standoff (BASS) test series[C]. In: Proceedings of the 11th International Symposium on Interaction of the Effects of Munitions with Structures. Mannheim, Germany, 2003.

[5] Wu J., Liu J., Du Y.. Setup distance and structure design of assembling blast resistant wall[J]. Protective Engineering, 2007, 1 49-53.

[6] Wu J., Liu J., Du Y.. Elastic-plastic dynamic calculation for component structures of assembling blast resistant wall[J]. Protective Engineering, 2007, 2 40-44.

[7] Wang N.. The Calculation Principle and Design for Protective Structures[M]. 1998, Nanjing: The Engineering Institute of Engineer Corps.