{"title":"预制混凝土靶的抗射弹穿透实验和数值研究","authors":"","doi":"10.1016/j.ijimpeng.2024.105053","DOIUrl":null,"url":null,"abstract":"<div><p>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.</p></div>","PeriodicalId":50318,"journal":{"name":"International Journal of Impact Engineering","volume":null,"pages":null},"PeriodicalIF":5.1000,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental and numerical investigation on projectile penetration resistance of prefabricated concrete targets\",\"authors\":\"\",\"doi\":\"10.1016/j.ijimpeng.2024.105053\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>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.</p></div>\",\"PeriodicalId\":50318,\"journal\":{\"name\":\"International Journal of Impact Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.1000,\"publicationDate\":\"2024-07-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Impact Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0734743X24001775\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Impact Engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0734743X24001775","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
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.
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