预制混凝土靶的抗射弹穿透实验和数值研究

IF 5.1 2区 工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Impact Engineering Pub Date : 2024-07-14 DOI:10.1016/j.ijimpeng.2024.105053
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引用次数: 0

摘要

预制超高性能混凝土(UHPC)靶材具有抗渗透能力强、施工质量好等优点。然而,预制靶材中的界面会不可避免地降低其抗渗透性。针对这一问题,提出了一种使用湿接缝和钢筋的新型预制技术。为了证明所提技术的有效性,首先对由预制超高性能混凝土砌块、湿接缝和钢筋组装而成的预制靶进行了两组射弹穿透试验,并与相应的整体靶试验结果进行了比较,证明预制靶与相应的整体靶的抗穿透性相当。然后,基于孔方模型和 SPG 方法,建立了两种试验的数值模型,并与实验数据进行了验证。验证后的数值模型被进一步用于研究界面、湿接缝和钢筋对预制靶抗渗性的影响。数值结果发现,水平界面对穿透阻力的影响有限,而垂直界面的影响很大。数值结果还证明了利用湿接缝和钢筋连接预制块的拟议技术的有效性。研究成果可为在防护工程中使用预制目标提供重要参考。
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Experimental and numerical investigation on projectile penetration resistance of prefabricated concrete targets

Prefabricated ultra-high-performance concrete (UHPC) target has the advantages of prominent anti-penetration capability and good construction quality. However, the interfaces in the prefabricated target would inevitably reduce its penetration resistance. To deal with this problem, a new prefabricated technique with the use of wet joints and rebars is proposed. To demonstrate the effectiveness of the proposed technique, two sets of projectile penetration tests on prefabricated targets assembled by prefabricated UHPC blocks, wet joints and rebars were firstly conducted and compared with corresponding experimental results of monolithic targets, demonstrating the comparable penetration resistance between prefabricated targets and corresponding monolithic targets. Then, based on the Kong–Fang model and SPG method, the numerical models of the two tests were developed and validated against the experimental data. The validated numerical models were further used to investigate the influences of interfaces, wet joints and rebars on the penetration resistance of prefabricated targets. The numerical results found that the horizontal interfaces have a limited influence on the penetration resistance while the vertical interfaces have a strong influence. It also numerically demonstrated the effectiveness of the proposed technique using wet joints and rebars to connect prefabricated blocks. The research results can provide an important reference for the use of prefabricated targets in protective engineering.

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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
期刊最新文献
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