Evaluation of Master Curve of Response-based Modulus for Asphalt Pavement Layer Under Vehicular Loading

被引：0
|
作者：
Cheng H.-L. [1 ,2 ]
Li B. [3 ]
Liu L.-P. [1 ]
Sun L.-J. [1 ]
机构：
[1] Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai
[2] Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong
[3] Longhuai Expressway Management Center, Nanyue Transportation Group, Yingde
来源：
Sun, Li-Jun (ljsun@tongji.edu.cn) | 1600年 / Chang'an University卷 / 33期
关键词：
Asphalt layer; Back-calculation; Dynamic strain response; Loading frequency; Master curve; Response-based modulus; Road engineering;
D O I：
10.19721/j.cnki.1001-7372.2020.10.007
中图分类号：
学科分类号：
摘要：
The modulus of the asphalt pavement layer is an essential parameter for pavement design. To quantitatively analyze the mechanical properties of the field asphalt layer, in this study, a method to determine the modulus master curve of the field asphalt layer based on the measured strain data was proposed. First, the dynamic strain responses of two typical asphalt pavements, specifically, flexible and semi-rigid pavements, under different temperatures and loading speeds, were measured. Secondly, based on the measured strain pulses, the loading frequencies of the asphalt layers were calculated under different conditions. Subsequently, the dynamic modulus of the asphalt layer was back-calculated based on the finite element model and measured strains. Finally, the modulus master curve of the field asphalt layer was established, and the reliability of this master curve was further verified. It is found that the loading frequencies of the asphalt layer increase approximately linearly with the wheel motion speeds. In addition, the frequency values rise with an increase in temperature. The modulus of the field asphalt layer decreases significantly with the temperature but increases with the wheel motion speed. The sigmoidal model was used to fit the master modulus curve of the field asphalt layer combined with the loading frequencies and modulus back-calculation results. This master curve was found to be practicable enough to predict the moduli of the field asphalt layer under other loading conditions. The method proposed in this study can provide a reference for the processing of strain data obtained from other experimental sections. © 2020, Editorial Department of China Journal of Highway and Transport. All right reserved.
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页码：125 / 134
页数：9
相关论文
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