钢管约束混凝土抗多发打击试验

为研究钢管约束混凝土抗多发打击性能，进行了12.7 mm穿甲弹多发打击钢管约束混凝土厚靶试验，得到靶的损伤模式和侵彻深度，并建立重复打击侵彻深度预测公式。结果表明：厚度为300 mm的小直径钢管约束混凝土靶能够有效防御3发12.7 mm穿甲弹的重复打击，第二、第三发较前一发侵彻深度的增幅分别小于20%和10%；重复打击侵彻深度预测公式与试验吻合较好。研究结果可为钢管约束混凝土防枪弹结构和遮弹层结构的研究提供参考。
To study the multi-hit performance of steel-tube-confined concrete, experiments of thick steel-tube-confined concrete targets normally impacted by 12.7 mm armor piercing projectile were carried out, the damage modes and the depth of penetration were obtained, and the formula for multi-hit depth of penetration was established. The results show that: steel-tube-confined concrete targets of 300 mm in thickness can effectively resist armor piercing projectile for 3 times, and the penetration depth increment for the second and third impacts to their former impact are less than 20% and 10%, respectively; the formula for multi-hit penetration depth is in good agreement with that of experiment. Results are beneficial to the studies of anti-bullet structures and bursting layer structures of steel tube-confined concrete.