Feasibility Study on Application of Controlled Electrical Discharge Impulse Crushing System to Lifesaving Operations in Earthquake Disasters
Feasibility Study on Application of Controlled Electrical Discharge Impulse Crushing System to Lifesaving Operations in Earthquake Disasters
复制标题
可控放电脉冲破碎系统应用于地震救生作业的可行性研究
DOI：
10.1061/(asce)sc.1943-5576.0000401
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发表时间：
2019
影响因子：
1.9
通讯作者：
Mikio Tanaka
中科院分区：
文献类型：
--
作者：
T. Fukuda;S. Adhikary;K. Fujikake;K. Sasaki;Mikio Tanaka
由于大地震事件导致的结构倒塌在世界各地都是常见的现象。在地震发生后72小时内发生大地震，营救被困在倒塌钢筋混凝土结构中的人员是非常重要的。因此，放电脉冲粉碎系统(EDICS)在快速拆除倒塌的钢筋混凝土结构物中可能是非常有效的。作为一项开创性工作，本研究旨在开发一种新的技术来控制EDICS在混凝土中形成的裂缝的扩展方向。通过对混凝土板试件的EDICS试验，研究了装药孔周围空洞对控制裂缝扩展方向的有效性。因此，空孔直径与装药孔与空孔之间的中心距之间的关系必须满足一个特定的方程。最后，LS-DYNA的分析结果与实验观测结果吻合较好。作为一个整体，这项研究将为减灾小组提供一个平台，以便有效和高效地制定救援行动的战略。
The collapse of structures due to massive seismic events is usually observed around the world. It is very important to rescue people who are trapped inside the collapsed RC structures by a big earthquake within 72 h after the earthquake has occurred. Thus, an electrical discharge impulse crushing system (EDICS) may be very effective in the rapid dismantling of collapsed RC structures. As a pioneering work, this study aims at developing a novel technique in controlling the growth direction of a crack formed in concrete by the EDICS. The effectiveness of empty holes created around a charging hole for controlling the crack growth direction is investigated through EDICS testing of concrete plate specimens. As a result, the relationship between the empty hole diameter and the center-to-center distance between the charging hole and empty hole must be satisfied with one particular equation. Finally, the analytical results of LS-DYNA are in good agreement with the experimental observations. This study as a whole would provide a platform to the disaster mitigation team to strategize the rescue operation in an effective and efficient manner.