Based on the three-dimensional discrete element method,discrete element models of high modulus asphalt pavement and SBS modified asphalt pavement considering temperature gradient and fatigue damage were established to simulate the rutting depth,internal shear stress and lateral strain of pavement under traffic load.The mechanical response of high modulus asphalt pavement under driving load was compared and studied.The results show that the frequency of load,temperature and asphalt pavement material have significant effects on the mechanical response of asphalt pavement un-der driving load.The mechanical response of asphalt pavement increases with the increase of load times.The higher the temperature,the greater the mechanical response of asphalt pavement.The mechanical response of different pavement structures is different,but the difference is very small at low temperature.At the same temperature,especially at high temperature,the mechanical response of high modulus asphalt pavement is lower than that of SBS modified asphalt pavement.In addition,the shear stress and transverse strain under the wheel center change along the depth direction of as-phalt pavement.Shear stress first increases and then decreases along the depth direction of pavement,and transverse strain monotonically decreases along the depth direction of pavement.Compared with SBS modified asphalt pavement,the location of maximum shear stress in high modulus asphalt pave-ment is closer to the road surface.
关键词
道路工程/高模量沥青路面/力学响应/三维离散元法/温度梯度/疲劳损伤
Key words
road engineering/high-modulus asphalt pavement/mechanical response/three-dimensional discrete element method/temperature gradient/fatigue damage
维普
万方数据