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利用有限元分析方法,建立沥青路面的三维模型,对比车辆在匀速行驶与制动状态下沥青路面结构受力的不同,研究车辆制动对沥青路面产生的影响,分析车辆在匀速运动与在减速制动时沥青路面的受力的变化规律。结果表明,车辆在制动时沥青路面的垂直应力、竖向位移、水平剪应力都会明显的增大。沥青路面的各个结构层,在车辆制动条件下的最大水平切应力平均是车辆匀速行驶时的4倍,所以在经常承受汽车制动力的路段应大幅提高沥青路面的抗剪强度。
By using finite element analysis method, the three-dimensional model of asphalt pavement is established. By comparing the difference of the force of asphalt pavement under the condition of uniform running and braking, the influence of vehicle braking on asphalt pavement is analyzed. The variation of stress on asphalt pavement during braking. The results show that the vertical stress, vertical displacement and horizontal shear stress of asphalt pavement are obviously increased when the vehicle is braking. Asphalt pavement structure layer, the maximum horizontal shear stress in the vehicle braking conditions average 4 times the vehicle at a constant speed, so often bear the braking force of the road section should be greatly improved asphalt pavement shear strength.