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Mechanical response of asphalt pavement based on vehicleroad coupling vibration |
1. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang, Hebei 050043, China; 2. Key Laboratory of Traffic Safety and Control in Hebei Province, Shijiazhuang Tiedao University, Shijiazhuang, Hebei 050043, China; 3. School of Languages and Communication Studies, Beijing Jiaotong University, Beijing 100089, China; 4. Alcon (China) Ophthalmic Products Co., Ltd., Beijing 100020, China
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Abstract A threedimensional 1/4 vehicle model with two degrees of freedom and a viscoelastic asphalt pavement model were established by ABAQUS. The rubber tires and the nonlinear contact between tire and pavement were considered in the models.The central difference method was used to solve the problems, and the results were compared with the references. The results show that the models are feasible. The maximum vertical compressive stress of the upper layer under static force is 0.402 MPa, and the dynamic load of 1/4 vehicle is 0.563 MPa, which is 40.05% higher than that under static force. The maximum vertical displacements of the upper layers of grade A, B and C pavement are 0.589, 0.698 and 0.941 mm, respectively, and the displacement of grade C is 59.76% larger than that of grade A. The maximum vertical compressive stresses of the upper layers are 0.497, 0.702 and 0.739 MPa, respectively, and the maximum vertical compressive stress of grade C is 48.69% larger than that of grade A. The maximum vertical and transverse compressive strains are appeared in the middle layer.The maximum vertical tension strain, longitudinal compressive strain and transverse tension strain are appeared in the lower layer,and the maximum longitudinal tension strain is appeared in the soil foundation. The greater the vehicle speed is, the smaller the pavement response is. The greater the axle weight is, the greater the pavement response is.
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