Distribution Characteristics of Contact Stress between Vehicle Tire and Road Surface and Mechanical Model

In order to study the effect of heavy traffic on asphalt pavement performance,we researched the distribution characteristics of the contact stress between tire and road surface.The contact is impacted by situation of tire and road surface.Using the mechanical method,and comprehensively considering the tire structure type,tire tread,tire pressure,tire vertical load,vehicle speed,tire working status,pavement surface texture,and dry and wet conditions,we analysed tire-pavement contact shape,contact stress direction combination and contact stress distribution characteristics,and simplified the load model through mathematical derivation.Assuming that the contact surface is rectangle when the vehicle speed is steady,considering the correction factor of tire-pavement contact stress,we established a new 3D tire-pavement contact stress mode,which is advantageous to analyse the distribution characteristics and influencing factors of contact stresses in vertical,horizontal longitudinal and horizontal transverse directions.