近年，爆発事故や自然災害によって衝撃的な荷重がコンクリート構造物に作用し，損傷や破壊が生じるケースが増加している。衝撃荷重を受けるコンクリート構造物の破壊は，全体破壊と局部破壊に大きく分類できる。飛翔体がコンクリート構造物に高速度で衝突すると，衝突条件によっては表面破壊（衝突面の破壊)，裏面剥離（衝突面と反対面のコンクリートの剥離)，貫通（表面破壊と裏面剥離が連結して飛翔体が裏面側〜貫通する破壊）等の局部破壊を生じる。%Projectiles would be released by an accident such as explosions, and impinge on structures. Airplanes, cars and so on can also be impact objects. The explosion and clash occasionally cause fire if there are fire bad like oil, fuel and any other combustible materials. Local damage of concrete structures, i.e. spalling, scabbing, perforation, would occur if the concrete structures are impacted by high velocity projectiles. Scabbing and perforation must be prevented in order to protect people and any other properties inside of the structure. Moreover if fire is assumed to occur after the impact, fire must not spread to other compartments or spaces. Therefore, fire tests on concrete plates impacted by high velocity projectiles were carried out in order to know fire behavior of the concrete plates. In addition, temperatures in concrete plates were numerically calculated in order to know the inside temperatures. As the results of study, cracks produced in concrete plates spalled by impact lead to less effect on thermal insulation performance of the plates.
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