中文摘要：

研究了4种不同钢纤维掺量（体积掺量分别为0％，1．0％，1．5％，2．O％）的大掺量粉煤灰超高性能混凝土的单轴压缩强度、弹性模量、单轴抗拉强度、弯曲韧性、断裂韧性、断裂能等静态力学行为，以及高速冲击、压缩作用下的应力波传播规律、应力-应变曲线和破坏特征等动态力学行为．结果表明：掺加钢纤维的大掺量粉煤灰超高性能混凝土的轴心抗压强度、弹性模量和抗拉强度略有增大，韧性指数、残余强度、断裂韧度和断裂能成倍提高；未能增加冲击、压缩作用下的应变率效应程度，但却增大动态应力-应变曲线下的面积，提高试件破坏的应变率阈值，使混凝土存在裂而不散的破坏现象．

英文摘要：

Static mechanical behaviors such as uniaxial compression strength, elasticity modulus, uniaxial tensile strength, flexural toughness, fracture toughness and fracture energy, and dynamic mechanical behaviors such as stress-wave propagation, stress-strain curve and failure characteristic, of high-volume-fly-ash concrete with varying steel fiber content （volume fraction of 0% , 1% , 1.5% and 2% ） were studied. The results showed that, with the addition of steel fiber, compressive strength, elastic modulus and tensile strength of high-volume-fly-ash high performance concrete increased slightly, and toughness index, residual strength, fracture toughness and fracture energy could be multiplied. The addition of steel fiber failed to increase the level of strain rate effect under impact com- pression, but could enlarge the covered area of the dynamic stress-strain curve and the critical strain to the failure of concrete samples so that the concrete failed but didn＇ t collapse.