Dynamic response viscoelastic analysis of long-uphill asphalt pavement subjected to vehicle load
1.Key Laboratory for Highway Construction Technology and Equipment of Ministry of Education, Chang′an University, Xi′an, Shaanxi 710064, China; 2.School of Energy Engineering, Yulin University, Yulin, Shaanxi 719000, China
Abstract：To investigate the dynamic response of long-uphill asphalt pavement subjected to climbing vehicle load，Dongfeng EQ1108G6D13 vehicle was selected as a representative vehicle.The load calculation model of climbing vehicle and the viscoelastic constitutive relation were achieved by finite element analysis to establish a three-dimensional transient finite element model of pavement. The variations of slope, load and temperature were analyzed by nonlinear solution of finite element model， and the situ strain experiment was conducted according to the simulation result. The results show that with the increasing of slope, the dynamic response increases slightly. With the increasing of vehicle load and temperature, the dynamic response is increased greatly, especially at high temperature. The maximum value of longitudinal shear strain appears 5 cm under road surface, while the maximum value of transverse shear strain concentrates 5~17 cm under road surface. The shear destruction easily occurs at mid-surface and the anti-shear ability should be improved. The difference between simulation and experiment results is less than 20%，which illuminates that the proposed model can well simulate the mechanical behavior of pavement subjected to climbing vehicle.
2014, Vol. 35 
