Semi-flexible pavement microscomic mechanical analysis method under vehicle-temperature load coupling action

Abstract

The invention relates to a semi-flexible pavement microscomic mechanical analysis method under vehicle-temperature load coupling action and belongs to the technical field of pavement material research. The problems of single load type, one-sided calculation result, low accuracy and the like in the existing semi-flexible pavement microscomic mechanical analysis are solved. The method comprises thefollowing steps: firstly, obtaining material parameters of the semi-flexible pavement at different temperature through an indoor experiment and obtaining temperature related functions of the parameters through fitting; secondly, establishing a semi-flexible pavement two-dimensional model and endowing the composition materials in the model with thermotechnical parameter; thirdly, using an FISH language writing program, and updating the mechanical parameters of the composition materials obtained by the fitting functions in real time along with the temperature change of the materials in each stepof the calculation process; and finally, simulating vehicle load loading and monitoring the microscomic mechanical response condition of the semi-flexible pavement under the vehicle-temperature loadcoupling action. The method can exert effects in microscomic mechanical research of other pavement type multi-filed coupling action and provides basis for knowing strength formation mechanism.

Description

Technical field [0001] The invention is a mesomechanics analysis method of semi-flexible pavement under the coupling action of vehicle-temperature load, and belongs to the technical field of asphalt pavement. Background technique [0002] Studies have shown that even when the macro-indices of the materials are the same, the road performance of roads may show great differences due to the more complicated meso-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. However, with the advancement of modern science and technology such as the microprecision of test equipment, image processing technology, software simulation, etc. There are also more and more researches on observation mechanics. Due to the undulating topography along the road, the variability of geology, geomorphology, and climatic characteristics, coupled with the difference in...

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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.