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Advisor(s)
Abstract(s)
A Three-dimensional (3D) finite element (FE) model was developed to calculate the temperature of a pavement located in Northeast of Portugal. A case study was developed to validate the model. Input data to the model were the hourly values for solar radiation, air temperature and mean daily values of wind speed obtained from a meteorological station. The thermal response of a multilayered pavement structure was modeled with a transient thermal analysis for 4 months (December 2003 to April 2004) and the analysis was initiated with a full-depth constant initial temperature obtained from field measurements. During these 4 months, the pavement temperature was measured at a new pavement section, located in IP4 main road, near Bragança, in northern Portugal. At this location, seven thermocouples were installed in the asphalt concrete layers at seven different depths. These pavement data were used to validate this simulation model by a comparison of model calculated data with measured pavement temperatures. The 3D FE analysis proved to be a interesting tool to simulate the transient behavior of asphalt concrete pavements. The suggested simulation model can predict the pavement temperature at different levels of bituminous layers with good accuracy. É apresentado um modelo numérico, baseado no método dos elementos finitos, para determinação do estado térmico horário dum pavimento, resultante das variações horárias da temperatura do ar, radiação solar e da velocidade do vento. Apresenta-se um estudo de convergência do modelo com dados observados durante 4 meses, num pavimento flexível real, e com os resultados da simulação com diferenças finitas.
Description
Keywords
Asphalt pavement Temperature Finite element method Finite difference Thermal model Pavement temperature field data
Citation
Minhoto, Manuel; Pais, Jorge; Picado-Santos, Luís (2005). Predicting asphalt pavement temperature with a three-dimentional finite element method. Transportation Research Record: Journal of the Transportation Research Board. ISSN 0361-1981. 1919 p. 96-110
Publisher
Transportation Research Board of National Academies