"Jingang Expressway"Under High Temperature and Strong Radiation Environment Study on Simulation of Asphalt Pavement Deformation Field
The high temperature weather of"Jingang Expressway"in summer leads to the deterioration of the stability of asphalt mixture,and the adhesion of asphalt mixture is easy to deteriorate under the action of strong radiation,and the asphalt pavement is more prone to cracking,rutting and spalling under the same load.Based on the basic principle of heat transfer,the finite element model of asphalt pavement temperature field was established based on ABAQUS to simulate the variation law of pavement temperature field in the high temperature and strong radiation area by simulating the actual climate conditions of"Jingang Expressway".The delay of UV and temperature on asphalt pavement was further analyzed.Finally,parameters such as temperature and UV of asphalt pavement in summer were collected by outdoor experiment,and the results were fitted with simulation results.Relevant conclusions were drawn:the curve of change of asphalt pavement temperature is consistent with environmental temperature and UV radiation intensity,but its peak value is slightly behind the two,and the lag time is different.The temperature has a lag effect on the road temperature,the lag time is about lh,and the lag time of ultraviolet radiation on the road temperature is about 2h.The temperature of asphalt pavement fluctuates greatly under high temperature and strong radiation and only high temperature environment,and the difference value is above 30℃.
high temperature environmentultraviolet radiationasphalt pavementheat transferthe experiment
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