Structural response of steel-concrete composite panels to near field simultaneous blast and fragmentation loading

IF 5.1 2区 工程技术 Q1 ENGINEERING, MECHANICAL
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Abstract

Steel-concrete composite sandwich panels are used in blast doors or blast walls to protect personnel and equipment in explosive environments due to their superior performance against blast effects. In the design of such panels, most design methods treat blast and fragment loading independently for far-field explosions. However, the synergistic effects of combined blast and fragments loading should be accounted for in close-in explosion scenarios. In this study, a field test program was conducted to assess the damage of the steel-concrete composite panels subjected to close-in explosion of cased charges at various scaled distance between 0.39 and 0.78 m/kg1/3. Characterization test of cased charge detonation was performed to explore the combined loading effect. The analysis includes the pressure-time history from the cased charge detonation, distribution of the fragment masses and velocities over the test panels. The structural damage and response of the composite panels against the combined loading effects was measured. The results indicated that in addition to the damage from the blast wave, the panel was remarkably damaged by the fragment impact. Despite the significant structural damage, the panels maintained its structural integrity after the tests. Additionally, quasi-static load tests were conducted on the panels to quantify their load resistant differences in pristine condition and various damaged conditions due to the explosive effects.
钢-混凝土复合板在近场爆炸和碎片同时加载下的结构响应
钢-混凝土复合夹层板因其优异的抗爆性能,被用于防爆门或防爆墙,以保护爆炸环境中的人员和设备。在设计此类板材时,大多数设计方法都将远场爆炸的爆炸荷载和碎片荷载分开处理。然而,在近距离爆炸情况下,则应考虑爆炸和碎片组合加载的协同效应。在本研究中,我们进行了一项现场试验计划,以评估钢-混凝土复合板在 0.39 至 0.78 m/kg1/3 的不同比例距离内受到套管炸药近距离爆炸的破坏情况。为探究综合加载效应,还进行了套管炸药爆炸的特性测试。分析包括套管装药起爆的压力-时间历史、碎片质量分布以及在试验面板上的速度。测量了复合材料板在联合加载效应下的结构损伤和响应。结果表明,除了爆炸波造成的破坏外,面板还受到碎片冲击的严重破坏。尽管结构受到严重破坏,但试验后面板仍保持了结构完整性。此外,还对面板进行了准静态负载测试,以量化其在原始状态和因爆炸影响而受损的各种状态下的抗负载差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
International Journal of Impact Engineering
International Journal of Impact Engineering 工程技术-工程:机械
CiteScore
8.70
自引率
13.70%
发文量
241
审稿时长
52 days
期刊介绍: The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them: -Behaviour and failure of structures and materials under impact and blast loading -Systems for protection and absorption of impact and blast loading -Terminal ballistics -Dynamic behaviour and failure of materials including plasticity and fracture -Stress waves -Structural crashworthiness -High-rate mechanical and forming processes -Impact, blast and high-rate loading/measurement techniques and their applications
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