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YANG Yaozong, KONG Xiangzhen, TANG Junjie, FANG Qin. Numerical simulation and engineering design method for prefabricated concrete bursting layer subjected to projectile penetration[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0279
Citation: YANG Yaozong, KONG Xiangzhen, TANG Junjie, FANG Qin. Numerical simulation and engineering design method for prefabricated concrete bursting layer subjected to projectile penetration[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0279

Numerical simulation and engineering design method for prefabricated concrete bursting layer subjected to projectile penetration

doi: 10.11883/bzycj-2024-0279
  • Received Date: 2024-08-11
  • Rev Recd Date: 2024-09-30
  • Available Online: 2024-10-23
  • Prefabricated concrete bursting layer has a very important application prospect in the field of protective engineering attributed to its technical advantages including high construction efficiency and construction quality. However, compared with the monolithic cast-in-situ concrete bursting layer, the impact resistance of the prefabricated concrete bursting layer may be significantly reduced because of the interfaces between the prefabricated blocks and the cast-in-situ part. Therefore, it is important for engineers to reasonably design the prefabricated concrete bursting layer to make its penetration resistance comparable to the monolithic one. To this end, a kind of prefabricated bursting layer connected by wet joints and rebars was proposed in our previous study. In order to apply the prefabricated bursting layer in protective engineering, a series of numerical models were developed to further study its penetration resistance. Firstly, based on the Kong-Fang model and smoothed particle Galerkin (SPG) method, the numerical models were developed and validated against the experimental data of projectile penetrating monolithic and prefabricated targets. Then, the validated numerical models were further used to investigate the influences of prefabricated block size, wet joint width and anchorage length, spacing and diameter of rebars on the penetration resistance of prefabricated targets. Numerical results indicate that increasing the width of wet joints, reducing the spacing between rebars, and extending the anchorage length of rebars can significantly enhance the penetration resistance of prefabricated targets. After clarifying the influences of these parameters, an engineering design method for a prefabricated concrete bursting layer was proposed. Finally, based on this method, two prefabricated high performance concrete targets subjected to two typical types of warhead penetration were designed. Numerical results show that the penetration resistances of two prefabricated targets were comparable to monolithic targets. The proposed engineering design method can provide a reference for engineering applications of prefabricated concrete bursting layers connected by the wet joints and rebars.
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