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首页> 外文会议>Proceedings of the Thirty-Second Annual Conference on Explosives and Blasting Technique vol.2 >Explosive Destruction of an Underground Reinforced Concrete Bunker - Computer Hydrocode Simulation
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Explosive Destruction of an Underground Reinforced Concrete Bunker - Computer Hydrocode Simulation

机译：地下钢筋混凝土掩体的爆炸破坏-计算机液压模拟

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A carefully designed and controlled in-place destruction experiment was performed on a concrete bunker buried in 4.27 m (14 fit.) of soil. The objective was to determine if the explosive charges would collapse the structure in-place without requiring mechanical excavation. Collapse of the buried structure was first attempted by drilling holes in the soil and placing four 13.38 Kg (29.5 lb) Comp B explosive charges at a depth of 2.13 m (6.7 ft.). The configuration of the charges when detonated was 2.13 m (6.7 ft.) off the top of the concrete roof and 3.66 m (12 ft.) apart in a square pattern. Detonation of these charges created a crater ～4.88 m (16 ft.) in diameter and 2.13 m (6.7 ft.) deep, leaving ～2.13 m (6.7 ft.) of soil covering. Very limited spalling occurred on the ceiling of the concrete structure as a result of detonating these four charges. The second attempt to collapse the structure consisted of placing another single 13.38 Kg (29.5 lb) charge, identical to the first four, near the geometrical center of the bunker roof. This charge was detonated in the soil cover 100 to 200 mm (4 to 8 in.) above the reinforced concrete roof, collapsing it. Due to the collapsed roof and remaining soil cover, the structure had been collapsed in place, requiring no further demolition. A computer simulation of the above explosive destruction scenario was completed using the computer hydrocode AUTODYN with a granular material model to treat the soil and the RHT brittle material model to represent the concrete. AUTODYN accurately recreated the scenario including the slightly damaged response of the concrete structure to the initial four charges and the collapse of the structure resulting from the second single charge close to the roof.
机译：在埋入4.27 m（14磅）土壤的混凝土掩体中进行了精心设计和控制的就地破坏试验。目的是确定炸药是否需要在不进行机械挖掘的情况下使结构坍塌。首先，通过在土壤中钻孔并在2.13 m（6.7英尺）深度处放置四颗13.38 Kg（29.5磅）Comp B炸药来尝试掩埋结构的崩溃。炸药在爆炸时的构型为距混凝土屋顶顶部2.13 m（6.7 ft。），呈正方形分布，相距3.66 m（12 ft。）。这些炸药的爆炸产生了直径约4.88 m（16英尺）的火山口，深度达2.13 m（6.7英尺），留下了约2.13 m（6.7英尺）的土壤覆盖率。由于引爆这四种装药，混凝土结构的天花板发生了非常有限的剥落。破坏结构的第二次尝试是在沙坑顶的几何中心附近再放置一个与前四个相同的13.38 Kg（29.5 lb）装药。该装药在钢筋混凝土屋顶上方100至200毫米（4至8英寸）的土壤覆盖层中引爆，使其塌陷。由于屋顶坍塌和剩余的土壤覆盖，该结构已经坍塌到位，无需进一步拆除。使用计算机液压代码AUTODYN，使用粒状材料模型处理土壤，并使用RHT脆性材料模型表示混凝土，完成了以上爆炸破坏场景的计算机模拟。 AUTODYN精确地重现了这种情况，包括混凝土结构对最初的四个装药的响应略有损坏，以及由于靠近屋顶的第二个单个装药导致的结构倒塌。

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