Investigation of the Responses of Asphalt Pavement Structure Considering Load - Poisson's Ratio Relation

Abstract:

Abstract. Poisson’s ratio is one of the important parameters that can be used to reflect the deformation characteristics of solid materials. To further understand the mechanical behaviors of materials and improve the accuracy of the finite element simulation results, the Poisson’s ratio must be defined accurately. In this paper, DIC technology is employed to investigate the Poisson’s ratios of asphalt mixtures under the different gradation and different compaction conditions. It is found that the Poisson’s ratios of different asphalt mixture are quite different and the number of compaction had a greater influence on Poisson’s ratio. It also showed that Poisson’s ratio of asphalt mixture was not a constant under the 25°C temperature condition, but varied with load. The experiment data suggested that the curve of the load - Poisson’s ratio could be divided into three sections through the observation of the graph and it also could be used to investigate the properties of asphalt mixtures deformation resistance. General-purpose finite element software is used to simulate the different contact pressure and Poisson’s ratio under dynamic loading condition, in order to find the response of asphalt pavement structure based on the relationship between load and Poisson’s ratio. It was found that the relationship of load - Poisson’s ratio significantly affected the response of asphalt pavement. It meant that the relationship of load - Poisson’s ratio should be considered when designing the asphalt pavement to improve the asphalt pavement service life.

• Periodical: Advanced Engineering Forum (Volume 5)
• Pages: 230-237
• DOI: https://doi.org/10.4028/www.scientific.net/AEF.5.230
• Online since: July 2012
• Authors: Lei Zhang, Yi Qiu Tan, Yang Jian Ou, Xiang Bing Gong
• Keywords: Asphalt Mixture (AC), Deformation Property, Poisson's Ratio, Structure Response

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