Effect of Temperature and Vehicle Speed on Modulus Field and Fatigue Life of Semi-rigid Asphalt Pavement

被引：0
|
作者：
Huang L. [1 ,2 ]
Song W. [1 ,2 ]
Jiang Z. [3 ]
Yang S. [1 ,2 ]
机构：
[1] College of Civil Engineering, Hunan University, Changsha
[2] Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province, Changsha
[3] Zhejiang Transportation Planning and Design Institute Co Ltd, Hangzhou
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2021年 / 48卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Asphalt pavement; Correction factor; Fatigue life; Modulus field; Road engineering;
D O I：
10.16339/j.cnki.hdxbzkb.2021.05.017
中图分类号：
学科分类号：
摘要：
In order to analyze the distribution characteristics of the modulus field of semi-rigid asphalt pavement in the time domain and spatial domain and to study the effect of the annual change of the modulus field on the fatigue life of the structural layers, the asphalt layers were subdivided into several sub-layers with a thickness of 1 cm. The modulus field distribution in the asphalt layers was obtained by iterative calculations based on the Odemark method, and the fatigue life correction factors of structural layers were obtained based on the Miner linear fatigue damage model as well as the mechanical responses of the pavement structure under 456 conditions throughout the year. The results show that the modulus field varies significantly with time. At the speed of 70 km/h, the ratio of the annual maximum and minimum values of the modulus at each depth of the asphalt layer reaches 20.1~34.9, and the modulus with the pavement depths are not equal at the same time. The ratio of the modulus at the speed of 120km/h to that at 10 km/h is in the range of 1.12 ~ 2.28, which means that the vehicle speed has a significant effect on the modulus field. The influence of the annual change of the modulus field on the fatigue life of pavement structures should be considered. The fatigue life of the upper base calculated under the standard conditions at 20℃ and 10 Hz is conservative, while the fatigue life of the lower base is dangerous. The calculation results under the standard condition should be revised by the fatigue life correction factor when checking the fatigue life of the pavement structures. © 2021, Editorial Department of Journal of Hunan University. All right reserved.
引用
收藏
页码：148 / 156
页数：8
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