中文摘要：

用端部弯折型、端部扁平型和波浪型3种钢纤维分别配制抗压强度大于100 MPa的超高性能纤维混凝土,纤维体积掺率分别为1.0%、2.0%、2.5%和3.0%。通过立方体抗压试验和梁抗弯试验,研究钢纤维形状和体积掺率对超高性能纤维混凝土流动性、抗压强度、抗弯强度、断裂能和弯曲韧度的影响。试验结果表明：纤维体积掺率为1.0%-2.5%时,端部扁平型钢纤维超高性能混凝土的抗弯强度、断裂能和弯曲韧度最佳;纤维体积掺率为3.0%时,端部弯折型钢纤维超高性能混凝土的抗弯强度、断裂能和弯曲韧度最佳;纤维体积掺率为2.0%时,端部扁平型钢纤维超高性能混凝土的施工性能和力学性能最佳;纤维体积掺率为1.0%-3.0%时,波浪型钢纤维超高性能混凝土的抗压强度最高,但抗弯强度和断裂能最低。

英文摘要：

Ultra-high performance fiber reinforced concretes（UHPFRC） with compressive strength over 100 MPa were confected by using steel fibers,such as kink end type,flat end type and wavy type.Doped fiber volume ratios were 1.0%,2.0%,2.5% and 3.0% respectively.The influences of steel fiber shapes and doped volume ratios on the fluidity,compressive strength,flexural strength,fracture energy and bending toughness of UHPFRC were researched through cube compressive tests and beam flexural tests.Experiment result shows that when doped fiber volume ratios are from 1.0% to 2.5%,UHPFRC with flat end steel fiber has the best flexural strength,fracture energy and bending toughness.When doped fiber volume ratio is 3.0%,UHPFRC with kink end type steel fiber has the best flexural strength,fracture energy and bending thoughness.When doped fiber volume ratio is 2.0%,UHPFRC with flat end type steel fiber has the best construction performance and mechanical performances.When doped fiber volume ratios are from 1.0% to 3.0%,the compressive strength of UHPFRC with wavy type steel fiber is highest than the,but its flexural strength and fracture energy are lowest.7 tabs,8 figs,23 refs.