采用Ф100 mm分离式霍普金森压杆(SHPB)试验装置研究了不同纤维体积掺量的玄武岩纤维混凝土在不同应变率下的冲击压缩力学性能,并对试验的有效性进行了分析.结果表明:玄武岩纤维混凝土的动态强度增长因子与平均应变率的对数近似呈线性关系,强度与变形能力随平均应变率的提高而线性增加,体现了很强的应变率相关性;纤维体积掺量为0.1%的玄武岩纤维混凝土较素混凝土的动态抗压强度提高了26%,变形能力提高了14%;纤维体积掺量分别为0.2%、0.3%的玄武岩纤维混凝土的动态抗压强度比素混凝土高出25%左右,而变形能力较素混凝土无明显优势;在玄武岩纤维混凝土的SHPB试验中,试件破坏时刻为123.3～239.45 μs,近似恒应变率加载时间比例约为62%,且应变率曲线的波动范围控制在23%左右,能够较好地满足应力均匀分布及恒应变率加载要求,表明SHPB试验结果可靠.
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