中文摘要：

为了研究纤维沥青混凝土低温性能及其路面温度应力计算方法,通过聚酯纤维沥青混凝土约束试件温度应力试验（TSRST）,分析了纤维体积率和长径比对沥青混凝土低温抗裂性能的影响,建立了考虑纤维含量特征参数影响的纤维沥青混凝土TSRST试验参数计算模型和纤维沥青混凝土温度应力计算模型。研究结果表明：纤维含量特征参数能综合反映纤维体积率和长径比对沥青混凝土低温抗裂性能的影响,在所进行的试验范围内,聚酯纤维沥青混凝土的最佳纤维体积率、长径比和纤维含量特征参数分别为0.35%、324和1.13。

英文摘要：

In order to investigate the low temperature performance of fiber reinforced asphalt concrete and the thermal stress calculation method of fiber reinforced asphalt concrete pavement,the impacts of fiber volume ratio and fiber aspect ratio on low temperature anti-cracking performance of asphalt concrete were analyzed through thermal stress restrained specimen test（TSRST）of asphalt concrete with polyester fiber.The parameter calculation model of TSRST and the thermal stress calculation model of fiber reinforced asphalt concrete were established,considering the influence of fiber content characteristic parameter.The results show that the fiber content characteristic parameter can comprehensively reflect the influences of fiber volume ratio and fiber aspect ratio on low temperature anti-cracking performance of asphalt concrete.Within the test scope in this paper,the optimum fiber volume ratio,fiber aspect ratio and fiber content characteristic parameter of fiber reinforced asphalt concrete are 0.35%,324 and 1.13 respectively.