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Method for evaluating fatigue cracking damage of asphalt pavement caused by temperature change

A technology for asphalt pavement and fatigue cracking, which is applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., and can solve problems such as inability to correctly and reasonably evaluate fatigue cracking damage of asphalt pavement

Active Publication Date: 2020-07-10
WUHAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present application provides a method for evaluating the fatigue cracking damage of asphalt pavement caused by temperature changes, which solves the problem that the prior art cannot correctly and reasonably evaluate the fatigue cracking damage of asphalt pavement

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  • Method for evaluating fatigue cracking damage of asphalt pavement caused by temperature change
  • Method for evaluating fatigue cracking damage of asphalt pavement caused by temperature change
  • Method for evaluating fatigue cracking damage of asphalt pavement caused by temperature change

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Embodiment Construction

[0035] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] This embodiment provides a kind of evaluation method of fatigue cracking damage of asphalt pavement caused by temperature change, see figure 1 , including the following steps:

[0037] Step 1. Construct a tire model characterized by load.

[0038] The tire model is divided into five regional tire bodies on the tire-road surface contact area, and the vertical tire forces of the five regional tire bodies are symmetrically distributed. The magnitudes of the vertical tire forces of the tire body in the five regions are respectively denoted as P1, P2, P3, P2, and P1; the magnitude relationship between P1, P2, and P3 satisfies: P1<P2<P3.

[0039] In a specific implementation manner, P1, P2, and P3 are all in the form of half-sine waves within ...

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Abstract

The invention belongs to the technical field of asphalt pavement damage evaluation, and discloses a method for evaluating fatigue cracking damage of an asphalt pavement caused by temperature change. The method comprises the following steps: constructing a tire model characterized by load; constructing asphalt pavement structure model, constructing a nonlinear model of the rebound modulus and the temperature of the asphalt material, acquiring nonlinear distribution information of the rebound modulus of the asphalt surface layer, acquiring a transverse tensile strain value and a longitudinal tensile strain value of the bottom of the asphalt surface layer at the central position of the load area, and selecting a larger value as a tensile strain value of the bottom of the asphalt surface layer; according to the tensile strain value of the bottom of the asphalt surface layer and the rebound modulus of the bottom of the asphalt surface layer, constructing a fatigue cracking damage model of the asphalt pavement, and evaluating the fatigue cracking damage condition of the asphalt pavement. According to the method, the defects in the field of asphalt pavement fatigue cracking damage evaluation can be overcome, and the asphalt pavement fatigue cracking damage can be correctly and reasonably evaluated.

Description

technical field [0001] The invention relates to the technical field of asphalt pavement damage evaluation, in particular to an evaluation method for fatigue cracking damage of asphalt pavement caused by temperature changes. Background technique [0002] With the development of traffic demand, the load acting on the asphalt pavement is increasing, and the influence on the properties of the pavement structural material is gradually increasing. At this time, the pavement structural material can no longer be simply regarded as a linear elastic material. The asphalt pavement is in the atmospheric environment. Due to the change of air temperature, the temperature of each layer of the pavement structure is different. Many previous studies have regarded asphalt material parameters, such as elastic modulus and Poisson's ratio, as fixed values ​​to analyze the strain response of the pavement. Represents the modulus of resilience under changing temperature conditions, and the actual m...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/13G06F119/08G06F119/14
CPCY02T90/00
Inventor 郭敏锐周兴林李向文
Owner WUHAN UNIV OF SCI & TECH