Hierarchical approach for fatigue cracking performance evaluation in asphalt pavements
Ibrahim ONIFADE1(), Yared DINEGDAE1, Björn BIRGISSON2
1. Department of Civil and Architectural Engineering, KTH Royal Institute of Technology, Stockholm, Sweden 2. School of Engineering and Applied Science, Aston University, Aston Triangle, Birmingham B4 7ET, United Kingdom
In this paper, a hierarchical approach is proposed for the evaluation of fatigue cracking in asphalt concrete pavements considering three different levels of complexities in the representation of the material behaviour, design parameters characterization and the determination of the pavement response as well as damage computation. Based on the developed hierarchical approach, three damage computation levels are identified and proposed. The levels of fatigue damage analysis provides pavement engineers a variety of tools that can be used for pavement analysis depending on the availability of data, required level of prediction accuracy and computational power at their disposal. The hierarchical approach also provides a systematic approach for the understanding of the fundamental mechanisms of pavement deterioration, the elimination of the empiricism associated with pavement design today and the transition towards the use of sound principles of mechanics in pavement analysis and design.
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