RETRACTED: Analysis and applicability of road temperature stress behavior in cold area under large temperature difference

In order to understand variation of temperature stress in pavement interior in exterme or great cooling climate, the temperature stress behavior and structural applicability of three different base types in cold region were studied. With the help of Abaqus software, the temperature stress of the pavement under the environment of large temperature difference of 20°C, 30°C and 40°C daily is obtained, and the mechanical response of different base courses under the coupling effect of temperature and dynamic load is analyzed. The results show that composite base pavement has the best applicability in the cold region with large temperature difference. When the daily temperature difference increases by 10°C in winter, the variation range of road surface, asphalt base and cement stabilized macadamite top is about 30%∼35%, 15%∼28% and 41%∼50%, respectively. When the daily temperature difference increases by 10°C in summer, the stre-ss increases by 102%∼121%, 77%∼80% and 18%∼21%, respect-vely. The stress increase of composite base pavement is the least. Moreover, it still has advantages under the coupling effect of temperature and dynamic load. To be specific, all the mechanical indexes are small under the coupling effect of low temperature a-nd dynamic load. The shear stress of asphalt layer is better und-er the action of high temperature and dynamic load.