A Cross-Scale Analysis Method for Stress Response of Asphalt Pavement Structural Design

Abstract

The invention discloses a scale-span analysis method of bituminous pavement structure design stress response. The scale-span analysis method comprises the following steps that a three-dimensional overall micromodel of a pavement is established according to an actual structure and load parameters to obtain all layers of stress response and cutting boundary displacement; two-dimensional macroscopic and microscopic scale sub-models of the pavement are established, stress response of the macroscopic and microscopic scale sub-models is analyzed; finally, the stress response of the three-dimensional overall micromodel and the stress response of the macroscopic and microscopic scale sub-models are compared. The scale-span analysis method completes the three-dimensional overall micromodel and the macroscopic sub-model of the pavement and scale-span analysis of the microscopic scale sub-model based on finite element analysis of a bituminous pavement test piece and makes different scales of models related through cutting boundary displacement, the scale effect of a pavement structure can be well explained, the bituminous pavement structure and material combination design are optimized.

Description

technical field [0001] The invention relates to digital image processing technology, in particular to a cross-scale analysis method for stress response of asphalt pavement structural design. Background technique [0002] For the pavement structure, the current research methods are mainly divided into macro-mechanics method and micro-mechanics method. The current analysis and design of asphalt pavement structure considers the macro scale and simplifies the asphalt pavement material into a continuous and uniform elastic medium. On the mesoscopic scale, asphalt pavement materials are characterized as multiphase composite materials, showing certain anisotropy, and their failure is affected by multiple coupling factors of the mesoscopic properties of materials. [0003] The macroscopic performance of pavement structure and materials is affected by the mesoscopic structure, and the macroscopic failure is caused by the development of mesoscopic failure. At present, the mesoscale an...

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Problems solved by technology

[0003] The macroscopic performance of pavement structure and materials is affected by the mesoscopic structure, and the macroscopic failure is caused by the development of mesoscopic failure. At present, the mesoscale analysis method based on the asphalt pavement structure is still in the early stage of exploration, and mainly focuses on the asphalt mixture. In terms of the characterization of material mechanical properties, the research methods are mainly based on discrete element and boundary element models, which are difficult to model, take a long time to calculate, and do not correspond closely to the macroscopic pavement structure analysis model

In the prior art, there is no relatively complete method that combines the analysis method based on the macroscopic angle with the analysis method based on the mesoscopic angle, and compares the results of the two scale analysis to study the scale effect of asphalt pavement

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