中文摘要：

简要综述了国内外关于钢纤维混凝土弯曲韧性指数的计算方法，并选取我国现行的规程JGJ／T221—2010试验方法，通过钢纤维高性能混凝土的弯曲韧性试验，研究了钢纤维体积分数和钢纤维类型对钢纤维高性能混凝土弯曲韧性的影响．结果表明：钢纤维高性能混凝土峰值荷载与弯曲韧性均随着体积分数的增大而提高；微细型钢纤维提高混凝土弯曲强度指标幅度最大，端钩型钢纤维提高混凝土弯曲韧性指标幅度最大．

英文摘要：

Several calculation methods of steel fiber reinforced concrete （SFRC） flexural toughness index which adopted widely at home and abroad were summarized. JGJ/T 221--2010 test method used for SFRC in China were selected. By flexural toughness experiment of steel fiber reinforced high-performance concrete, the influences of the volume fraction and the type of steel fiber on the flexural toughness and relevant index were investigated. The results showed that the peak load and flexural toughness were both improved with the increase of steel fiber volume fraction; the fine steel fiber improved concrete flexural strength with the largest amount, and the end-hook steel fiber improved eoncrete flexural toughness with the largest amount.