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Analysis of perpetual pavement strain distribution and fatigue damage

YANG Yongshun1, WANG Lin2, GAO Xuechi1, JIA Haiqing3, WEI Jincheng2   

  1. 1. Shandong Highway Administration, Jinan 250001, China;
    2. Shandong Transportation Research Institute, Jinan 250031, China;
    3. Shandong Heritage Highway Materials Co., Jinan 250100, China
  • Received:2008-10-10 Revised:1900-01-01 Online:2009-04-16 Published:2009-04-16

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Abstract:

Because the HMA fatigue limit is the theoretical base of perpetual pavement design, to grasp the strain distribution and strain action of HMA layer is key for perpetual pavement design. The traffic, axle load spectrum and pavement temperature of a perpetual pavement test road was analyzed by field measured data. The characteristic of asphalt layers dynamic strain pulse was analyzed and regression models were constructed based on controlled axle load truck tests, which could correlate the maximum longitudinal tensile strain to pavement temperature and axle load. Based on the axle load spectrum, temperature distribution and strain regression models, the pavement strain distribution in a year was calculated. According to the fatigue limit theory, the cumulative damage method was used to calculate the pavement fatigue life, and the fatigue life of perpetual pavement test road was analyzed.

Key words: perpetual pavement, axle load spectrum, temperature, strain, fatigue, cumulative damage

CLC Number: 

  • U416217
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