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
CN110286045AInactive Publication Date: 2019-09-27CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2019-09-27
Estimated Expiration
Not applicable ยท inactive patent

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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.
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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 ...

Claims

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