超高性能混凝土、纤维增强高强及高延性混凝土抗侵彻性能比较

Resistance of Ultra-High Performance Concrete, Fiber Reinforced High Strength Concrete and Engineered Cementitious Composite Against Projectile Penetration

比较了超高性能混凝土、纤维增强高强混凝土以及高延性混凝土厚靶在不同尺寸刚性弹丸及侵彻速度冲击作用下的破坏模式,并量化了损伤程度。分析了混凝土材料侵彻深度随抗压强度、弹丸相对骨料大小以及等效硬度的变化规律。采用校准的K&C模型模拟了刚性弹丸冲击超高性能混凝土的破坏结果,模型预测的侵彻深度和开坑面积均与试验结果吻合较好,验证了其有效性。

The effectiveness of ultra-high performance concrete(UHPC), fiber reinforced high strength concrete(FRHSC), and engineered cementitious composite(ECC) against projectile penetration was investigated. The influence of compressive strength,relative size of projectile to aggregate, and effective hardness on the penetration depth was analyzed. Key parameters of K&C constitutive model were calibrated with the corresponding experimental data available in literature. The calibrated model was used to simulate the response of UHPC subjected to projectile penetration in terms of penetration depth and equivalent crater diameter. The numerical prediction is in a reasonable agreement with the experimental results.