Journal of Civil Aviation University of China ›› 2023, Vol. 41 ›› Issue (1): 41-46.

• Civil Aviation • Previous Articles     Next Articles

Evaluation of fatigue life of asphalt overlay based on reflective crack induced by aircraft loads

SHI Chao1 , ZHANG Lei 2 , TIAN Shuaituan3 , YAO Pengfei 2   

  1. (1. China Airport Planning & Design Institute Co., Ltd., Beijing 100101, China; 2. ITS Center, Southeast University, Nanjing 210018, China; 3. Beijing Super-Creative Technology Co., Ltd., Beijing 100624, China)
  • Received:2022-08-27 Revised:2022-10-13 Online:2023-10-29 Published:2023-10-29

Abstract:

Reflective crack is one of the primary pavement distresses leading to the failure of composite pavement. To study the fatigue life of asphalt overlay controlled by reflective crack induced by large aircraft, composite stress intensity factor was firstly taken as the mechanical index to establish the fatigue life prediction model of the asphalt overlay based on propagation law of reflective crack. The distribution of stress on the asphalt overlay under the critical locations of gear loads with different interface conditions was then simulated by finite element method.

Then, the regular pattern of the composite stress intensity factor was also obtained and applied to establish a formula between the fatigue life and the mechanical & geometrical parameters of different overlay structures. Finally, the formula was applied to optimize the asphalt overlay structure of the runway in a civil hub airport and the result turned out to be 6 cm SMA(stone mastic asphalt) + 9 cm AC(asphalt concrete).

Key words: composite airport pavement, fatigue life, reflective crack, composite stress intensity factor

CLC Number: