Mitigating confined blast response of buried steel box structure with foam concrete
Mitigating confined blast response of buried steel box structure with foam concrete
复制标题
用泡沫混凝土减轻埋地钢箱结构的有限爆炸响应
DOI：
10.1016/j.tws.2021.108473
复制
发表时间：
2021
影响因子：
6.4
通讯作者：
Pengli Cong
中科院分区：
文献类型：
--
作者：
Xiaojuan Wang;Xuejian Zhang;Luyao Song;Honyuan Zhou;Yonghui Wang;Hong Zhang;Pengli Cong
近年来，地下结构的需求和应用大大增加。由于空间部分或完全受限，受到内部危险（如爆炸）的埋地结构的安全性是一个主要问题。在本研究中，有限的爆炸缓冲效果埋钢箱泡沫混凝土的实验和数值研究。对埋地钢箱进行了有无泡沫混凝土层的试验研究，建立了数值模型并进行了验证。对泡沫混凝土的抗压强度、泡沫混凝土厚度、泡沫混凝土的堆载密度等影响泡沫混凝土缓蚀效果的因素进行了详细的分析和讨论。结果表明，在典型的装药密度下，泡沫混凝土层的应用能有效地抑制约束爆炸。随着泡沫混凝土抗压强度和厚度的增加，钢箱变形方面的保护效果提高。如果泡沫混凝土层不足，可能会发生无效甚至负面缓解，应识别并避免。
The demand and application of buried structures have greatly increased recently. With space partially or fully confined, the safety of buried structures subjected to internal hazards such as explosions is a major concern. In the present study, confined blast mitigation effectiveness of buried steel boxes with foam concrete is experimentally and numerically investigated. Tests with and without foam concrete layer applied to buried steel boxes were conducted, with which numerical models were established and validated. Factors influencing the mitigation effectiveness, such as the crushing strength and thickness of foam concrete, loading density, are examined and discussed in detail. It is found that for typical loading density, applying foam concrete layer effectively mitigates confined blast. The protection effectiveness in terms of steel box deformation improves with increasing foam concrete crushing strength and thickness. Ineffective or even negative mitigation may occur if the foam concrete layer is insufficient, which should be identified and avoided.