Structural Engineering and Mechanics

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Effects of traffic characteristics on pavement responses at the road intersection

  • Yang, Qun (Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University) ;
  • Dai, Jingwang (Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University)
  • Received : 2012.02.23
  • Accepted : 2013.08.16
  • Published : 2013.08.25
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Abstract

Compared with pavement structures of ordinary road sections, pavement structures in the intersection are exposed to more complex traffic characteristics which may exacerbates pavement distresses such as fatigue-cracking, shoving, shear deformation and rutting. Based on a field survey about traffic characteristics in the intersection conducted in Shanghai China, a three dimensional dynamic finite-element model was developed for evaluating the mechanistic responses in the pavement structures under different traffic characteristics, namely uniform speed, acceleration and deceleration. The results from this study indicated that : (1) traffic characteristics have significant effects on the distributions of the maximum principal strain (MPS) and the maximum shear stress (MSS) at the pavement surface; (2) vehicle acceleration or deceleration substantially impact the MPS and MSS at pavement surface and could increase the magnitude of them by 20 percent to 260 percent; (3) in the vertical direction, with the increase of vehicle deceleration rate, the location of the MPS peak value and the MSS peak value changes from the sub-surface layer to the pavement surface.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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