混杂纤维轻骨料混凝土冲击性能试验研究

Experimental Study on Impact Performance of Hybrid Fibers Reinforced Light-weight Aggregate Concrete

为研究高强高性能混杂纤维轻骨料混凝土的冲击动力性能,首先介绍了其配合比和优良的静力力学性能,然后对其进行了分离式Hopkinson压杆冲击试验,得到了其受一次、多次冲击后的破坏现象和受力特点,分析了应变速率对其力学性能的影响。结果表明,混杂纤维轻骨料混凝土是一种应变速率敏感材料,其应变速率效应比普通混凝土的要高。在高应变速率时其动力力学性能得到明显改善,适合用于抗爆炸、冲击材料。

To study the impact dynamic performance of high strength hybrid fibers reinforced light-weight aggregate concrete, this paper introduces its mixing proportion and excellent static mechanical performance first, then tests it in SHPB, obtains its failure phenomena and mechanical characteristics after being impacted one or more times, and analyzes the influence of strain rate on its mechanical performances. The results show that the hybrid fibers reinforced light-weight aggregate concrete is a kind of material highly sensitive to the strain rate, its strain rate effect is more evident than that of the common concrete, and its dynamic mechanical performance is obviously improved under high strain rate, so it is especially suitable for resisting explosion and impact action.