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Development of Fatigue Performance Model of Asphalt Concrete using Dissipate Energy  

Kim, Nak-Seok (Kyonggi University, Department of Civil Engneering)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.10, no.3, 2010 , pp. 39-43 More about this Journal
Abstract
The main objective of this research is to develop a mechanistic performance predictive model for fatigue cracking of asphalt-aggregate mixtures. Controlled-stress diametral fatigue tests were performed to characterize fatigue cracking of asphalt-aggregate mixtures. Performance prediction model for fatigue cracking was developed using the internal damage ratio (IDR) growth method. In the IDR growth method, the general concepts of the dissipated energy, the reference tensile strain, the threshold tensile strain, and the strain shift factor were introduced. The source of the dissipated energy in the fatigue test is from the intrinsic viscoelastic material property of an asphalt concrete mixture and the damage growth within the asphalt concrete specimen. In controlled-stress mode test, the dissipated energy is gradually increased with an increasing number of load applications.
Keywords
Fatigue; Performance Model; Dissipated Energy; Threshold Tensile Strain;
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  • Reference
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