Asphalt pavement structure analysis equivalent method based on pavement material modulus stress and strain dependent model

Abstract

The invention relates to an asphalt pavement structure analysis equivalent method based on a pavement material stress and strain dependent model. According to a structural form and a material type ofan asphalt pavement to be analyzed, the thickness of each layer, a Poisson ratio and a pavement material modulus stress (strain) dependent model are determined, the modulus of each layer of an asphaltpavement structure is represented by the pavement material modulus stress (strain) dependent model, a calculation and analysis system is established by combining a calculation load and an interlayercombination condition, the most unfavorable point of the stress of each layer of the asphalt pavement structure is taken as an equivalent calculation point, the final modulus of each structural layeris obtained through iteration calculation, and the stress, strain and displacement of any point in the asphalt pavement structure are calculated according to an elastic layered system theory on the basis of the final modulus. This method considers the influence of material nonlinearity on pavement mechanical calculation, and enables the stress analysis of the asphalt pavement structure to be morereasonable and perfect.

Description

technical field [0001] The invention mainly relates to the field of road engineering, in particular to the force analysis problem of the asphalt pavement structure caused by the non-linear characteristics of the pavement material. Background technique [0002] The real mechanical response of pavement structure under load has always been a basic theoretical issue in the research of pavement structure analysis theory and design method. Due to the diversity and complexity of the constituent materials, the mechanical response of pavement structures under the action of vehicle loads and natural environments often shows obvious nonlinear characteristics. Over the years, in order to reveal the evolution mechanism of the service performance of pavement structures and establish a design theory that is more in line with the actual pavement structure and mechanical response behavior of materials, researchers at home and abroad have been working hard to explore the real mechanical respo...

AI Technical Summary

Problems solved by technology

Over the years, in order to reveal the evolution mechanism of the service performance of pavement structures and establish a design theory that is more in line with the actual pavement structure and mechanical response behavior of materials, researchers at home and abroad have been working hard to explore the real mechanical response of pavement structures under load. Non-linear characteristics, often can not get satisfactory results

[0003] At present, the pavement structure analysis method based on the assumption of linear elasticity, because the physical equation cannot correctly describe the nonlinear constitutive relationship of asphalt pavement materials, and the diversity of structural layer modulus test methods and the uncertainty of the value, it is difficult to Accurately and objectively evaluate the real stress state of the pavement structure, which is not conducive to guiding the design of new pavement and the life evaluation of pavement in service

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