JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2010, Vol. 34 ›› Issue (02): 111-114.doi: 10.3969/j.jssn.1000-2006.2010.02.026

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Analysis of surface crack propagation and fatigue life of granular base asphalt pavement

WANG Hongchang1,2, WANG Libin1, LI Guofen1   

  1. College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China; 2.Key Laboratory of Road Structure and Material of Ministry of Transport, Changsha University of Science and Technology, Changsha 410004, China
  • Online:2010-05-14 Published:2010-05-14

Abstract: In this paper, a finite element analysis model of 20node isoparametric elements was established in the commercial FEM software ABAQUS to investigate the effects of the granular base structure on anti-crack. According to the fracture mechanics theory, the surface crack of asphalt pavement with granular base was numerically analyzed. The crack propagation life was evaluated by Paris formula. The anti-cracking effect of granular layer was validated. The analysis indicated that the structure of graded crushed stone can enhance surface cracking fatigue life of asphalt pavement. When the thickness of granular base is 15—25 cm, the pavement has better crack resistance.

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