Conversion of dynamic axle load on asphalt pavement considering friction coefficient

Ding Han, Fei Shen, Ling Lin Li

Research output: Contribution to journalArticle

Abstract

In order to investigate the dynamic axle load conversion in complex conditions, the dynamic response of asphalt pavement subjected to moving load is analyzed, the validity of the numerical calculation and the influence of vehicle characteristics are discussed, and a conversion formula of the dynamic axle load is set up. Then, based on the two-dimension Lamb problem, the effectiveness of the numerical calculation is verified, and a three-dimension dynamic numerical model of asphalt pavement with rigid base is established to analyze the effects of vehicle speed, road surface friction coefficient and axle load. The results show that, when the vehicle moves at a constant speed, both the axle load and the road surface friction coefficient remarkably influence the dynamic response of pavement; and that the conversion coefficient of the dynamic axle load considering the friction coefficient is significantly greater than that of the static axle load. Moreover, it is found that the three-dimension finite element model, which takes into consideration various affecting factors of the vehicle and the asphalt pavement, accords well with the actual stress state of asphalt pavement structure; and that the presented conversion formula is feasible in improving the current design specifications.

Original languageEnglish
Pages (from-to)41-47
Number of pages7
JournalHuanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science)
Volume43
Issue number4
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • Asphalt pavement
  • Axle load conversion
  • Flexural stress
  • Moving load
  • Numerical calculation

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