Abstract
Analyses of dynamic responses are significantly important for the design, maintenance and rehabilitation of asphalt pavement. In order to evaluate the dynamic responses of asphalt pavement under moving loads, a specific computational program, SAFEM, was developed based on a semi-analytical finite element method. This method is three-dimensional and only requires a two-dimensional FE discretization by incorporating Fourier series in the third dimension. In this paper, the algorithm to apply the dynamic analysis to SAFEM was introduced in detail. Asphalt pavement models under moving loads were built in the SAFEM and commercial finite element software ABAQUS to verify the accuracy and efficiency of the SAFEM. The verification shows that the computational accuracy of SAFEM is high enough and its computational time is much shorter than ABAQUS. Moreover, experimental verification was carried out and the prediction derived from SAFEM is consistent with the measurement. Therefore, the SAFEM is feasible to reliably predict the dynamic response of asphalt pavement under moving loads, thus proving beneficial to road administration in assessing the pavement’s state.
Highlights
The analysis of loading in finite element (FE) simulation of asphalt pavement can be modelled in two types: dynamic or static analyses
This paper proposes to use the semi-analytical finite element method (SAFEM) for predicting the asphalt pavement dynamic responses under moving loads
The results predicted by SAFEM and ABAQUS are generally consistent with each other
Summary
The analysis of loading in finite element (FE) simulation of asphalt pavement can be modelled in two types: dynamic or static analyses. One method was proposed to meet the requirement of accuracy and efficiency, which is the so-called semi-analytical finite element method (SAFEM) [13,14,15,16,17,18,19,20] This method was first developed by Wilson [21] for linear analysis and Meissner [22] extended Wilson’s work to an elastoplastic body. Fritz [13] and Hu et al [14] further developed the SAFEM, and programed specific FE codes using this method to analyze the problems of asphalt pavement Their FE codes are relatively simple, e.g., only static analysis with linear elastic material properties and a total bond between pavement layers can be performed. A brief summary and conclusions are provided at the end
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