Variations in the dynamic triaxial strength of hybrid basalt–polypropylene fibre-reinforced concrete (HBPRC) with strain rate and confining pressure were investigated, and a dynamic non-linear Mohr–Coulomb (M–C) strength criterion for HBPRC was established. The results showed that the dynamic strength of HBPRC increased non-linearly with the strain rate and confining pressure; however, the strain rate effect decreased with an increase in the confining pressure. The restraint effect of the basalt fibre and polypropylene fibre on the cracks enhanced the strain rate effect of the dynamic strength of concrete. The cohesion of HBPRC increased with the strain rate and confining pressure but decreased with an increase in the amount of fibre monofilaments. However, the internal friction angle showed a reverse trend. The established dynamic non-linear M–C strength criterion reflected the relationship of the dynamic strength of HBPRC with the confining pressure and strain rate, as well as the effect of fibre content on dynamic strength. The less average standard deviation and the tangential relationship between the strength envelope and the Mohr’s circle of stress demonstrated the applicability of the established dynamic non-linear M–C strength criterion.

研究了玄武岩-聚丙烯纤维混杂混凝土（HBPRC）的动态三轴强度随应变率和围压的变化，并建立了HBPRC的动态非线性Mohr-Coulomb（MC）强度准则。结果表明，HBPRC的动态强度随着应变率和围压的增加而非线性增加。但是，随着围压的增加，应变率效应降低。玄武岩纤维和聚丙烯纤维对裂纹的抑制作用增强了混凝土动态强度的应变率效应。HBPRC的内聚力随应变速率和围压的增加而增加，但随纤维单丝数量的增加而减小。但是，内摩擦角显示出相反的趋势。建立的动态非线性MC强度标准反映了HBPRC的动态强度与围压和应变率之间的关系，以及纤维含量对动态强度的影响。较低的平均标准偏差和强度包络线与莫尔应力圆之间的切线关系证明了所建立的动态非线性M–C强度标准的适用性。