摘   要：进行了钢纤维与聚丙烯纤维掺量及其混杂对高性能混凝土抗压强度和劈拉强度的试验研究，探讨了不同混杂纤维组合对高性能混凝土基体力学性能的影响规律。结果表明，钢-聚丙烯纤维混凝土的抗压强度、劈裂抗拉强度及其纤维增强系数与钢纤维和聚丙烯纤维掺量及混杂比密切相关。钢纤维掺量较低时，抗压强度随聚丙烯纤维掺量增加先减小后增加；钢纤维掺量较大时，抗压强度随聚丙烯纤维掺量的增加一直增大；当钢纤维掺量一定时，劈裂抗拉强度随聚丙烯纤维掺量的增加先增大后减小。当钢纤维和聚丙烯纤维掺量分别为3%、0.3%时，混杂效应系数最大。

Abstract: The compressive strength and splitting tensile strength of high performance concrete(HPC) with different steel and polypropylene fibers content and hybrid ratio were studied, and the influence of mechanical properties of hybrid fiber reinforced HPC was discussed. The results indicate that the compressive strength, splitting tensile strength and fiber reinforcement factor of steel-polypropylene fiber concreteare closely relates to fiber content and hybrid ratio. When the steel fiber content is lower, the compressive strength decreases and then increases with the increase of the polypropylene fiber content. Otherwise, the compressive strength increases continuously. The splitting tensile strength of hybrid fiber concrete increases and then decreases with the increase of the polypropylene fiber content when steel fiber content is certain. When the content of steel fiber and polypropylene fiber is 3% and 0.3% respectively, the hybrid effect coefficient is the largest.