中文摘要：

通过9组不同配合比HDC试件的单轴受压试验,研究其抗压韧性的评价指标,并对HDC的变形能力进行等效分析,得到以下结论：（1）HDC单轴受压的峰值应变可达砂浆基体的2.31-3.64倍;（2）等效抗压韧性指数反映了试件单轴受压时单位体积的变形能,可作为HDC的抗压韧性评价指标;（3）HDC纤维桥联作用对等效抗压韧性指数和受压变形能力的提高可达砂浆基体的3倍以上;（4）根据试验结果建立了HDC等效抗压韧性指数W-（0.85）_（cu）与纤维掺量j之间的关系;（5）HDC基体内部的纤维桥联作用,相当于在试件内配置了大量约束箍筋,使试件的抗压韧性和受压变形能力明显提高.

英文摘要：

The compressive toughness evaluation index of HDC was studied in this paper based on the uniaxial compression test of 9 groups of HDC specimens with different mixture ratios. The equivalent analysis of its deformation capacity was also conducted and the following conclusions were obtained：（1） The peak strain of HDC under uniaxial compression is up to 2.31-3.64 times as large as that of the mortar matrix;（2） Equivalent compressive toughness index reflects the deformation energy per unit volume of specimens under uniaxial compression, and it can be used as the compressive toughness evaluation indicator of HDC;（3） The fiber bridging action of HDC improves the equivalent compressive toughness index and compressive deformation up to more than 3 times as large as the mortar matrix does;（4） According to the test results the relationship between equivalent compressive toughness index and volume ratio of PVA fiber is established;（5） The fiber bridging action of HDC, which is equivalent to configuring with a large number of constraints stirrups in the specimens, significantly improved the compressive toughness and compressive deformation of specimens.