2018 Volume 67 Issue 11 Pages 985-991
The objective of this study is to obtain data that contributes to the development of a damage-reducing method for reinforced concrete columns under severe accidents involving shock phenomena. Experimental investigations were conducted to evaluate the effects of long/short fiber reinforcement on the damage of reinforced mortar (RM) columns subjected to high-velocity projectile impact. The following two types of RM column specimens were supplied for high-velocity impact tests: (i) RM columns strengthened with two-directional aramid fiber sheets (AFRP sheets) lining; and (ii) RM columns of which the mortar was replaced with polyvinyl-alcohol fiber reinforced cementitous composite (PVA-FRCC). The results showed that the lining strengthening with two-directional AFRP sheets remarkably reduces the exfoliation of mortar even under the condition that an impact velocity is almost 1 000 m/s. PVA-FRCC also possessed good damage-reducing performance under an impact velocity of almost 600 m/s, but the exfoliation occurred under that of almost 1 000 m/s.
