Study on Mechanical Response and Widening Method of Lapped Area of New and Old Asphalt Pavement
The finite element analysis method was adopted to establish the new and old asphalt lap pavement model under the coupling of temperature field and vehicle dynamic load.This model carried out a stress analysis on the top layer of the pavement structure layer with the most significant mechanical response in the pavement lapped area,and set up the lap pavement comparison models at varying lap widths.The result shows that,the temperature gradient of the top layer of the lapped area is smaller under the high temperature environment in summer,and the temperature stress has little effect on the lapped area.The vehicle dynamic load factor constitutes the main reason for the tensile shear stress in the lapped area of the new and old pavement.With the increase of the over-limit vehicle load,the maximum tensile stress and shear stress at the top layer of the lapped area magnifies.Under the coupling effect of temperature and vehicle dynamic load,it is suggested that the lapped width of new and old pavements should be 15-30 cm.
reconstruction and extension projectasphalt pavementlapped pavement modelthermal-load couplinglapped widthstress analysis
万方数据
维普
