摘   要：选取普通混凝土、钢纤维混凝土、聚丙烯纤维混凝土进行快速冻融循环试验，研究了不同纤维混凝土冻融损伤的相关性能，根据损伤理论分析了纤维混凝土冻融损伤破坏的机理。根据试验结果分析进行拟合，建立了基于相对动弹模衰减的不同纤维混凝土冻融损伤模型。研究分析和计算表明，不同的纤维对混凝土抗冻性都有较大的影响，掺有钢纤维的混凝土抗冻性优于普通混凝土，掺有聚丙烯纤维的混凝土抗冻性最优；结合试验数据进行比较分析发现模型采用二次多项式函数的拟合精度比指数函数的拟合精度更高。

Abstract: Ordinary concrete, steel fiber and polypropylene fiber concrete are selected to conduct the quick freeze-thaw test, the damage behavior of different fiber concretes in freeze-thaw is studied. The mechanism of damage from freeze-thaw on fiber concretes is analyzed. According to the results of the experiment, the fitting is carried out. And a model of freeze-thaw damage of different fiber concretes for relative dynamic elastic is established. Research and calculation indicate that different fibers has great influence on the frost-resistance of concrete, the frost-resistance of concrete with steel fiber reinforced concrete is better than ordinary concrete. However, the frost-resistance of concrete by adding polypropylene fiber is the best. And the quadratic function model has a higher fit accuracy as compared to the exponential function model．