Method for analyzing influence of interlayer thermal resistance on stress of asphalt pavement structure

Abstract

The invention provides a method for analyzing the influence of interlayer thermal resistance on the stress of an asphalt pavement structure, and belongs to the technical field of asphalt pavements. The problems that an existing statistical analysis method for researching the influence of interlayer thermal resistance of an asphalt pavement structure on pavement mechanics is large in limitation, finite element analysis cannot highlight the characteristics of porous granular materials of the asphalt pavement, a modeling unit is single, and aggregate contact geometrical characteristics cannot bechanged are solved. The method comprises: using discrete element software for numerical simulation of an asphalt pavement structure; secondly, setting model boundary conditions, particle parameters, aunit contact model and a contact thermal resistance coefficient, establishing an asphalt pavement structure discrete element thermal analysis model, and performing thermal analysis; and finally, applying a vehicle load to the discrete element thermal analysis model of the asphalt pavement structure, recording stress data of the bottom of each layer at the center and the periphery of the load, drawing a stress comparison diagram according to the stress data under different interlayer thermal resistance conditions, and analyzing the influence of the interlayer thermal resistance of the asphaltpavement structure on the stress of the asphalt pavement.

Description

technical field [0001] The invention relates to an analysis method for the influence of interlayer thermal resistance on the stress of an asphalt pavement structure, and belongs to the technical field of asphalt pavement. Background technique [0002] In recent years, my country has vigorously developed highway transportation, and asphalt pavement has become the main form of expressways in my country based on its good road performance. With the increase of service time, some asphalt pavements that have been built have not reached the design service life, but there are various diseases and problems, including cracks, ruts, wrapping and so on. The appearance of these diseases indicates that the asphalt pavement has been subjected to forces exceeding its load limit during use, and these unknown forces have not been considered at the early stage of design or have not been completely resolved. Long-term practice has shown that the thermal resistance between layers of asphalt pav...

AI Technical Summary

Problems solved by technology

Solve the current problems of statistical analysis methods in the study of the influence of interlayer thermal resistance of asphalt pavement structure on pavement mechanics, the limitation of finite element analysis, the characteristics of porous granular materials of asphalt pavement, the single modeling unit, and the inability to change the geometric characteristics of aggregate contact, etc.

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