Local failure resistance of polypropylene fiber reinforced concrete plates subjected to projectile impact

IF 2.1 Q2 ENGINEERING, CIVIL
M. Beppu, Koki Mori, H. Ichino, Yoichiro Muroga
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引用次数: 2

Abstract

This study investigated local failure characteristics of polypropylene fiber reinforced concrete (PPFRC) plates subjected to projectile impact. Flexural and compression tests for two types of PPFRC specimens (PPFRC1 and PPFRC2) were conducted to examine mechanical properties of the PPFRC. The average flexural strength of PPFRC1 and PPFRC2 at a strain rate of 10−1/s were 12.2 N/mm2 and 10.4 N/mm2, respectively. The average compressive strength of PPFRC1 and PPFRC2 at a strain rate of 100/s were 58 N/mm2 and 74.9 N/mm2, respectively. Projectile impact tests for 60 mm- and 80 mm-thick PPFRC plates were conducted by using a 50 g-mass projectile collided at velocities corresponding to 193–423 m/s. Experimental results exhibited that the PPFRC plate had a higher effect of suppressing local failure than a plain concrete plate. Comparison of the tests results with the modified NDRC formula revealed that the limit scabbing thickness was 15–20% smaller than that of a plain concrete plate.
聚丙烯纤维混凝土板在弹丸冲击下的局部破坏抗力
研究了聚丙烯纤维混凝土(PPFRC)板在弹丸冲击下的局部失效特性。对两种类型的PPFRC试样(PPFRC1和PPFRC2)进行了弯曲和压缩试验,以检查PPFRC的机械性能。PPFRC1和PPFRC2在10−1/s的应变速率下的平均弯曲强度分别为12.2 N/mm2和10.4 N/mm2。PPFRC1和PPFRC2在100/s的应变速率下的平均抗压强度分别为58N/mm2和74.9N/mm2。60 mm和80 mm厚PPFRC板的弹丸冲击试验是通过使用一枚50 g质量的弹丸进行的,该弹丸以193–423 m/s的速度碰撞。试验结果表明,PPFRC板比素混凝土板具有更高的局部破坏抑制效果。试验结果与NDRC修正公式的比较表明,极限结疤厚度比素混凝土板的结疤厚度小15-20%。
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
CiteScore
4.30
自引率
25.00%
发文量
48
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