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Appl. Sci. 2017, 7(3), 305; doi:10.3390/app7030305

Fatigue Life Prediction of High Modulus Asphalt Concrete Based on the Local Stress-Strain Method

1
Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, South Erhuan Middle Section, Xi’an 710064, Shaanxi, China
2
Civil Engineering Materials Laboratory, East China Jiaotong University, Shuang Gang East Street, Nanchang 330000, Jiangxi, China
3
Shandong Highway Administration Bureau, Shungeng Road of Jinan City, Jinan 250000, Shandong, China
4
Jinhua Traffic Planning and Design Institute, Songlian Road of Jin Dong District, Jinhua 321015, Zhejiang, China
5
Anhui Highway Administration Center, Da Bie Shan Road of Hefei City, Hefei 230088, Anhui, China
*
Authors to whom correspondence should be addressed.
Received: 23 January 2017 / Revised: 13 March 2017 / Accepted: 15 March 2017 / Published: 20 March 2017
(This article belongs to the Special Issue Advanced Asphalt Materials and Paving Technologies)
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Abstract

Previously published studies have proposed fatigue life prediction models for dense graded asphalt pavement based on flexural fatigue test. This study focused on the fatigue life prediction of High Modulus Asphalt Concrete (HMAC) pavement using the local strain-stress method and direct tension fatigue test. First, the direct tension fatigue test at various strain levels was conducted on HMAC prism samples cut from plate specimens. Afterwards, their true stress-strain loop curves were obtained and modified to develop the strain-fatigue life equation. Then the nominal strain of HMAC course determined using finite element method was converted into local strain using the Neuber method. Finally, based on the established fatigue equation and converted local strain, a method to predict the pavement fatigue crack initiation life was proposed and the fatigue life of a typical HMAC overlay pavement which runs a risk of bottom-up cracking was predicted and validated. Results show that the proposed method was able to produce satisfactory crack initiation life. View Full-Text
Keywords: pavement engineering; high modulus asphalt concrete; local stress-strain; modified Neuber equation; fatigue life pavement engineering; high modulus asphalt concrete; local stress-strain; modified Neuber equation; fatigue life
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zheng, M.; Li, P.; Yang, J.; Li, H.; Qiu, Y.; Zhang, Z. Fatigue Life Prediction of High Modulus Asphalt Concrete Based on the Local Stress-Strain Method. Appl. Sci. 2017, 7, 305.

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