Method for representing fatigue characteristic temperature correlation of asphalt mixture in three-dimensional stress state

An asphalt mixture, temperature-dependent technology, used in the application of repetitive force/pulsation force to test the strength of materials, strength characteristics, analyze materials, etc., can solve the problem of less research on low-frequency temperature fatigue

Inactive Publication Date: 2019-09-27
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

Most of the relevant literature considers the load fatigue characteristics of materials, but there are few studies on low-frequency temperature fatigue

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  • Method for representing fatigue characteristic temperature correlation of asphalt mixture in three-dimensional stress state
  • Method for representing fatigue characteristic temperature correlation of asphalt mixture in three-dimensional stress state
  • Method for representing fatigue characteristic temperature correlation of asphalt mixture in three-dimensional stress state

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Embodiment Construction

[0071] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work all belong to the protection scope of the present invention.

[0072] The present invention provides a temperature correlation characterization method for the fatigue characteristics of asphalt mixture under a three-dimensional stress state, and the specific characterization method is as follows:

[0073] S1. Establish the strength yield surface model based on the three-dimensional stress state;

[0074] S1.1. Establish the failure criterion of asphalt pavement material under the three-dimensional stress state. Make...

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Abstract

The invention discloses a method for representing fatigue characteristic temperature correlation of an asphalt mixture in a three-dimensional stress state, and particularly relates to the field of road engineering. The method concretely comprises the following steps of: S1, establishing a strength yield surface model based on a three-dimensional stress state; S2, establishing a response function of the yield surface of the asphalt mixture; S3, determining fatigue stress paths in different stress states; S4, providing a novel fatigue characteristic analysis method based on a yield criterion idea. The method redefines the fatigue equation from the three-dimensional angle, and represents the fatigue life by using the temperature in combination with the influence of the temperature on the fatigue life. The fatigue life equation determined by the method is more scientific and more practical, and can play a guiding role in the design of asphalt pavements in China.

Description

technical field [0001] The invention relates to the technical field of road engineering, more specifically, the invention relates to a method for characterizing the temperature dependence of fatigue characteristics of asphalt mixture under a three-dimensional stress state. Background technique [0002] Transportation is the lifeblood of the national economy. With the development of economic construction, the demand for transportation is increasing. In the past ten years, my country's highway construction has developed rapidly, especially the development momentum of high-grade highways. According to the statistical bulletin of the Ministry of Transport, as of the end of 2017, the total mileage of national highways was 4.7735 million kilometers, ranking second in the world, of which the total mileage of expressways reached 136,500 kilometers. In the next decade or so, tens of thousands of kilometers of expressways and millions of kilometers of ordinary roads will be built, and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32G01N3/36
CPCG01N3/32G01N3/36G01N2203/0048G01N2203/0062G01N2203/0222
Inventor 吕松涛樊喜雁夏诚东陈东张芳超郑健龙
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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