Abstract
In order to ensure the service life of pavement in cold areas, this paper simulates the temperature field and stress field of pavement at high temperature of 60˚C and low temperature of -30˚C based on ANSYS software, and analyzes the changing trend of temperature of each layer with time and the temperature stress caused by it using the time-incremental finite element method. The results show that when the temperature is higher than 0˚C, the temperature between layers of the structure and the surface temperature shows an increasing trend. On the contrary, when the temperature is lower than 0˚C, it shows a decreasing trend. The more drastic the temperature change is, the greater the temperature stress of the pavement will be, which is easy to cause road structure diseases. When the temperature difference of pavement reaches 90˚C, the change of temperature stress between layers of road structure has a significant effect on the daily evolution of pavement.
Highlights
Northern China has distinct regional characteristics, and Jilin City of Jilin Province is the capital of rime
In order to ensure the service life of pavement in cold areas, this paper simulates the temperature field and stress field of pavement at high temperature of 60 ̊C and low temperature of −30 ̊C based on ANSYS software, and analyzes the changing trend of temperature of each layer with time and the temperature stress caused by it using the time-incremental finite element method
Taking the climate characteristic of high temperature and rain as an example, Baijian [5] concludes that the temperature field of the basic pavement varies periodically with the temperature and solar radiation, which could be represented by the attenuation exponential function model, and the time temperature curve shows obvious lag, but there is no relevant research on pavement temperature field in low temperature weather
Summary
Northern China has distinct regional characteristics, and Jilin City of Jilin Province is the capital of rime. The paper takes the climatic conditions of Jilin City as an example, where the temperature could reach 34 ̊C and the pavement temperature could reach 53 ̊C in summer, while the temperature could reach −30 ̊C and the pavement temperature could reach −33 ̊C in winter. The paper uses transient thermal analysis method in ANSYS software to simulate the distribution of temperature changes between layers of pavement structure based on extreme temperature. Taking Jilin City as an example, the paper uses numerical simulation to study the damage of temperature field and stress field on pavement under the temperature difference of 90 ̊C in the case of large temperature difference between summer and winter in the cold northern region in China, as well as the damage effect of temperature field on asphalt pavement
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