关键词: 钢纤维混凝土;抗冲击;分散系数;威布尔分布;失效概率

Abstract: Using self-made drop hammer impact test device,the impact tests were carried out on steel fiber reinforced concrete round cake specimens with volume fraction of 5 groups,namely 0,0. 5%,0. 8%, 1. 0% and 1. 2%,respectively. The number of fibers in the impact section was statistically analyzed, then dispersion coefficient was calculated and fitted. Besides,failure probability prediction was carried out in accordance with the impact test results based on the Weibull distribution statistical analysis. The results show that the fiber content has a significant improvement in impact properties. In addition,the fiber dispersion coefficient increased with the increase of the dosage. And the two-parameter Weibull distribution could appropriately evaluate its impact performance.

Key words: steel fiber reinforced concrete;impact resistance;dispersion coefficient;Weibull distribution;failure frobability