Load Stress Analysis On Asphalt Pavement Subjected To Temperature Change

Usually, in the design the asphalt pavement structure, engineers only consider the normal temperature and ignore the influence of temperature induced stress on the pavement structure. However, low temperature stress with the load often leads to certain degree of transverse cracks in the road surface, which reduces the pavement structure bearing capacity and service life. In this thesis, we consider the influence of temperature stress on the asphalt pavement structure, and then apply this kind of influence to the pavement structure design.Firstly, the Bisar 3.0 was used to calculate and analyze the influence of the pavement structure for the different temperature gradient of asphalt pavement layer and the asphalt mixture is considered the elastic when the temperature is lower; the temperature gradient was given, the influence of road surface temperature on the pavement structure was also studied. It is well know that the interface contact condition plays important role in the pavement structure, the author analyzed the stress of the pavement structure when the interface contact condition is changed from the continuous to sliding; Secondly, through the low temperature splitting test, it is verified that the splitting modulus and cleavage strength is increased when the temperature decreases; Finally, comparison of pavement structure stresses in different temperatures shows that temperature change has a great influence to the pavement structure. Therefore, it is necessary to consider the influence of temperature stress in the design of the asphalt pavement design. The findings in this paper are of reference value in order to improve the asphalt pavement design.