Prediction of fatigue life of asphalt mixture based on strain control

被引：5
作者：
Wu, Zhi-Yong [1 ]
Zhang, Xiao-Ning [1 ]
You, Hong [2 ]
Yuan, Miao-Miao [1 ]
Wan, Cheng [1 ]
机构：
[1] School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong
[2] Communication Surveying and Design Institute of Sichuan Provincial Communication Transport Dept., Highway Engineering Consulting Department, Chengdu 610041, Sichuan
来源：
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2014年 / 42卷 / 02期
关键词：
Asphalt mixtures; Dissipated energy; Failure criterion; Fatigue life; Relative change rate; Stiffness mo-dulus; Strain control;
D O I：
10.3969/j.issn.1000-565X.2014.02.021
中图分类号：
学科分类号：
摘要：
Four-point bending beam fatigue tests of three kinds of graded asphalt mixtures were carried out in the strain control mode, and two criteria for fatigue life prediction, namely the catastrophe point of the relative change rate of dissipated energy (Criterion 1) and the stiffness modulus decreasing to 50% of the initial stiffness modulus (Criterion 2), were compared. Then, two fatigue life prediction models respectively corresponding to the two criteria were constructed. The results show that (1) the initial stiffness modulus of the mixture decreases with the increase of strain level and nominal maximum particle size; (2) when Criterion 1 is used as the failure criterion, the same mixture mostly destroys with the same stiffness modulus at different strain levels, the destruction stiffness modulus of different mixtures decreases with increase of nominal maximum particle size, and the predicted fatigue life is longer than that predicted by Criterion 2; (3) the fatigue life of asphalt mixture significantly decreases with the increase of the strain level and the nominal maximum particle size; and (4) the fatigue life prediction model corresponding to Criterion 1 is of higher accuracy.
引用
收藏
页码：139 / 144
页数：5
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