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Effects of Moving Dynamic Vehicle Loads on Flexible Pavement Response  

Jo, Myoung-Hwan (경기대학교 토목환경공학부)
Kim, Nak-Seok (경기대학교 토목환경공학부)
Nam, Young-Ho (경기대학교 토목환경공학부)
Im, Jong-Hyuk (경기대학교 토목환경공학부)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.8, no.1, 2008 , pp. 39-45 More about this Journal
Abstract
The most important elements in flexible pavement design criteria are stress and strain distributions. To obtain reasonable stress and strain distributions in pavements, moving wheel loads must be applied to analyze the pavement responses. In this study, finite element analysis was used to identify the three-dimensional states using the vehicle load into a constant-position / time-variable load (25, 50 and 80km/hr). In an elastic system, the strain is the same in both longitudinal and transverse directions under a single wheel. However, the same is not necessary in a viscoelastic system. Test results showed that the maximum values between transverse and longitudinal strains the bottom of asphalt concrete base layers under 25km/hr were were about 40 percent.
Keywords
moving load; flexible pavement; design criteria; viscoelastic system; stress-strain distribution;
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