Abstract
The mechanical analysis of interlayer bonding problem of asphalt pavement is performed by the elastic layered system theory or finite element method (FEM); then, a lot of specialized programs based on the above theories emerged successively, of which BISAR3.0 and EverStressFE are quite representative. In order to further clarify the characteristics of BISAR3.0 and EverStressFE for investigating interlayer bonding problem of asphalt pavement, this paper will carry out a comprehensive comparison from the specific realization viewpoint, such as the principle of interlayer bonding, modeling, calculation processing, and result treatment, and a specific example will be given to compare and analyze their functions. The results indicate that the two programs have certain comparability in analyzing the interlayer bonding problem of asphalt pavement, which will contribute to the foundation for the rational selection of asphalt pavement structure mechanical analysis program.
Highlights
Asphalt pavement structure, as one of the main pavement forms, has been widely used for its advantages of great flatness, being seamless, short construction period, and convenient maintenance, while the distresses of asphalt pavement, such as slippage, rutting, and reflective crack, are especially serious
BISAR3.0 program makes a slight change in simulating interlayer bonding, combining the basis of Goodman mechanical model. e interface between the upper and lower horizontal structural layers is regarded as an infinite thin interlayer. e strength of the interlayer is expressed by the standard shear spring compliance AK, and the value of interlayer bonding state is represented by AK, which is reciprocal to the interlayer bonding coefficient K of Goodman model
(3) According to the results of Figure 9, at the condition of fully bonding, the maximum vertical compression strain on the top of subgrade calculated by EverStressFE is 217.7 × 10−6, while it is 214.47 × 10−6 which is calculated by BISAR. e maximum vertical compressive strain on the top of subgrade calculated by EverStressFE is 260.9 × 10−6, while it is 262.91 × 10−6 which is calculated by BISAR, both with the condition of fully slipping of the interface between the base-surface layers. e results show that the degree of coincidence is satisfactory
Summary
As one of the main pavement forms, has been widely used for its advantages of great flatness, being seamless, short construction period, and convenient maintenance, while the distresses of asphalt pavement, such as slippage, rutting, and reflective crack, are especially serious. E distresses of asphalt pavement depend on the mechanical parameters of each layer and are significantly affected by the interlayer bonding condition. Lepert et al stated that the serious damage of pavement caused by deterioration of interlayer bonding condition accounted for 5% of highway network at that time in France [4]. The real interlayer bonding conditions between layers are inconsistent with the assumption that the layers of pavement structure are completely continuous in the design, which leads to unreasonable structure design and distresses occur
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
