Mesomechanical analysis method of semi-flexible pavement under coupled vehicle-temperature load

Abstract

The present invention is a semi-flexible pavement mesomechanics analysis method under the coupling effect of vehicle-temperature load, which belongs to the technical field of pavement material research, and solves the problem of single load type, one-sided calculation results and low accuracy in the current semi-flexible pavement mesomechanics analysis. Bad question. The present invention first obtains the material parameters of the semi-flexible pavement at different temperatures through indoor tests, and obtains the temperature correlation function of each parameter through fitting; secondly, establishes a two-dimensional model of the semi-flexible pavement, and assigns thermal parameters to each component material in the model; then , use the FISH language to write programs, update the mechanical parameters of each component material obtained by the fitting function in real time at each step in the calculation process with the change of material temperature; finally, simulate the vehicle load loading, and monitor the semi-flexible pavement under the coupled action of vehicle-temperature load mesomechanical response. The invention can also play a role in the mesomechanics research of multi-field coupling action of other road surface types, and provides a basis for understanding the strength formation mechanism.

Description

technical field [0001] The invention relates to a mesomechanics analysis method of a semi-flexible pavement under the coupling action of a vehicle and a temperature load, and belongs to the technical field of asphalt pavement. Background technique [0002] Existing studies have shown that even when the macroscopic indicators of materials are the same, the road performance of roads may show great differences, which is due to the more complex mesoscopic mechanical behavior of road materials. For a long time, due to the lack of access to the microscopic information of materials, the research on pavement mesomechanics has been in a theoretical state. There are more and more researches on observability. Due to the undulating terrain along the road, the changeable geological, landform, and climate characteristics, and the varying degrees of economic development and heavy traffic in the cities and towns along the road, the complex and changeable characteristics of the road surface...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for analyzing the mesoscopic mechanics of semi-flexible pavement under the coupling effect of vehicle-temperature load. The method uses the modules of mechanics and thermal in numerical simulation software by establishing the function of semi-flexible pavement mesoscopic parameters and temperature changes. Write a program, use real-time update method in the process of simulating vehicle load loading, realize the mesomechanics simulation of semi-flexible pavement under the coupling effect of vehicle-temperature load, and solve the lack of mesomechanics analysis methods under the multi-field coupling effect of semi-flexible pavement at present , single load type, one-sided calculation results, poor accuracy, etc.