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研究了钢纤维掺量(体积分数)为0%,1%,2%,3%的钢纤维混凝土试块在应力比为1.00∶0,1.00∶0.25,1.00∶0.50,1.00∶0.75,1.00∶1.00,以及应变速率为10~(-5),10~(-4),10~(-3),10~(-2)s~(-1)下的双轴动态抗压性能,分析了以上3种因素对混凝土极限抗压强度、应力-应变曲线等力学指标的影响规律.结果表明:各种钢纤维掺量和应力比条件下,混凝土的极限抗压强度均随着应变速率的提高而增大;在相同应变速率和钢纤维掺量条件下,应力比为1.00∶0.50时,混凝土极限抗压强度最大.另外,钢纤维混凝土的韧性较普通混凝土有很大提高.
Steel fiber reinforced concrete specimens with 0%, 1%, 2%, and 3% steel fiber content were tested at stress ratios of 1.00: 0, 1.00: 0.75, 1.00: 1.00, and the biaxial dynamic compressive properties at 10 ~ (-5), 10 ~ (-4), 10 ~ (-3) and 10 ~ (-2) s ~ The results show that the ultimate compressive strength of concrete increases with the increase of strain rate And the maximum compressive strength of concrete under the condition of the same strain rate and steel fiber content is 1.00: 0.50, and the toughness of steel fiber reinforced concrete is much higher than ordinary concrete.