The dynamic compressive behaviour of hybrid basalt-polypropylene fibre-reinforced concrete (HBPRC) under confining pressure was investigated using a Hopkinson compression bar device with active confining pressure. The relationship between the pore structure and the dynamic compressive behaviour of HBPRC was discussed. The results indicate that the dynamic compressive behaviour of HBPRC under confining pressure shows evidently the strain rate dependence and the confining pressure dependence. The addition of basalt fibre (BF) and polypropylene fibre (PF) reduces the failure degree of concrete and improves the shear failure feature. The relationship between the pore surface fractal dimension and the strain rate effect of HBPRC indicates that the dynamic mechanical properties of HBPRC are affected not only by the fibre itself but also by the effect of fibre on the pore structure. In view of strengthening and toughening, BF is conducive to increasing the strength of HBPRC, whereas the PF is conducive to improving the toughness. Finally, based on the Hoek-Brown strength criterion, an empirical dynamic strength criterion for HBPRC accounting for the effect of fibre and pore structure is established and verified.

使用具有主动围压的霍普金森压杆装置研究了玄武岩-聚丙烯纤维增强混杂混凝土（HBPRC）在围压下的动态压缩行为。讨论了HBPRC的孔结构与动态压缩行为之间的关系。结果表明，HBPRC在围压下的动态压缩行为表现出明显的应变率依赖性和围压依赖性。玄武岩纤维（BF）和聚丙烯纤维（PF）的加入降低了混凝土的破坏程度，改善了剪切破坏特性。孔表面分形维数与HBPRC应变速率效应之间的关系表明，HBPRC的动态力学性能不仅受纤维本身的影响，而且受纤维对孔结构的影响。考虑到强化和增韧，高炉有利于提高HBPRC的强度，而PF有利于提高韧性。最后，基于Hoek-Brown强度准则，建立并验证了考虑纤维和孔结构影响的HBPRC经验动态强度准则。