Title: Analysis of Temperature Field Characteristics of Asphalt Concrete Pavement Structure Based on Measured Data
Abstract: In order to study the environmental influence on asphalt pavement temperature field and temperature field's sensitivity,we measured the atmospheric temperature and solar radiation energy in Nan'an district of Chongqing. According to the heat transfer theory,we established the model by using ABAQUS finite element software and carried on the secondary development. Considering the creep nonlinear effect of asphalt concrete pavement structure material at different temperatures,changing atmospheric temperature and wind speed parameter,etc.,we analysed the variation law of asphalt pavement structure temperature field with related parameter. The result shows that( 1) the influence of atmospheric temperature on asphalt pavement structure is mainly reflected in the pavement surface layer,the influence of temperature field on pavement structure is very small beneath a certain depth of pavement structure;( 2) atmospheric temperature is the main factor that affects the full day temperature field of asphalt pavement;( 3) at middle and high temperatures,with the increase of solar radiation energy,the effect of atmospheric temperature on pavementsurface temperature decreases;( 4) with the increase of pavement structure's depth,the frequency of atmospheric convection decreases in different depths,only after the upper structure finished air convection,the lower structure follows atmospheric convection and make the peak value of lower layer temperature difference delays;( 5) wind speed has great influence on the asphalt pavement temperature field,we should pay attention to temperature field error caused by wind speed.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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