• ISSN 0258-2724
  • CN 51-1277/U
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Volume 27 Issue 4
Jul.  2014
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Article Contents
Journal of Southwest Jiaotong University  > 2014  >  27(4): 682-686.
HUANG Bing, AI Changfa, YANG Enhui, CHENG Meng. Numerical Analysis of Dynamic Strain and Fatigue Characteristics of Asphalt Layer Considering Interlayer Condition[J]. Journal of Southwest Jiaotong University, 2014, 27(4): 682-686. doi: 10.3969/j.issn.0258-2724.2014.04.019
Citation: HUANG Bing, AI Changfa, YANG Enhui, CHENG Meng. Numerical Analysis of Dynamic Strain and Fatigue Characteristics of Asphalt Layer Considering Interlayer Condition[J]. Journal of Southwest Jiaotong University, 2014, 27(4): 682-686. doi: 10.3969/j.issn.0258-2724.2014.04.019
shu

Numerical Analysis of Dynamic Strain and Fatigue Characteristics of Asphalt Layer Considering Interlayer Condition

doi: 10.3969/j.issn.0258-2724.2014.04.019
  • Received Date: 29 Mar 2013
  • Publish Date: 25 Aug 2014
    Abstract
  • In order to determine the relationship between the fatigue life of asphalt layer and its influencing factors such as interlayer contact state, temperature, and axle load, a numerical calculation model of asphalt pavement was built based on the interlayer conditions by using the ABAQUS software. Through this model, the influence of these factors on the dynamic strain of the asphalt layer was analyzed. Then, the conventional fatigue life model of asphalt pavement was introduced to construct general fatigue equations for the asphalt layer of semi-rigid asphalt pavement or ultra-thin pavement subjected to multiple factors, and the correlation of fatigue life with the influencing factors and the most unfavorable point were determined. The results show that the interlayer bonding coefficient, temperature, and axle load all have significant effect on the fatigue life of asphalt layer, but the effect differs at different calculation points. Strengthening the interlayer bonding condition can improve the fatigue life of the asphalt layer: at the most unfavorable point, when the interlayer bonding coefficient is improved from 0.5 to 0.7, the fatigue life is increased by 13.6 times.

     

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