Essential Working Features of Asphalt Airport Pavement Revealed by Structural State-of-Stress Theory
Abstract
:Highlights
- Proposes the method for deriving the state variables from the tested strain and deformation data;
- Proposes the method for expressing the state of stress of the asphalt airport pavement using state variables;
- Proposes the method for expressing the state of stress of the asphalt airport pavement using state variables;
- What is the implication of the main finding?
Abstract
1. Introduction
2. Structural State-of-Stress Theory and Methods
2.1. Brief of Structural State-of-Stress Theory
2.2. Structural State-of-Stress Analysis Methods
3. Experiment of Asphalt Airport Pavement
3.1. Experimental Asphalt Airport Pavement
3.2. Loading Scheme
3.3. Arrangement of Measured Points
4. The State-of-Stress Analysis of the Tested Pavement
4.1. Procedure of State-of-Stress Analysis
4.2. Evolution Feature of Characteristic Parameter
4.3. Evolution of Characteristic Parameter
4.4. Evolution Feature of Characteristic Parameter
4.5. Evolution Feature of State-of-Stress Mode Δε around Point A
4.6. Evolution Features of State-of-Stress Mode around Points A, B and C
5. Discussion
6. Conclusions
- The proposed methods can derive the state variables and form the state-of-stress modes and the characteristic parameters that embody the essential features in the working process of the asphalt airport pavement. The slope increment criterion can detect the essential state-of-stress mutation features in the evolution curves of the characteristic parameters. Correspondingly, the investigation into the evolution curves of the state-of-stress mode also presents the mutation features. The mutation points reveal the EPB point at the traffic pattern number 249 and the real traffic pass number 5762, the failure starting point at 367 and 10,004 and the progressive point at 422 and 11,548. The characteristic points of the asphalt airport pavement are the reflection of the natural law of a quantitative change to qualitative change.
- The evolution of the state-of-stress characteristic parameter presents the mutation feature around the EPB point with the strain accumulation inside the pavement. But, the state-of-stress mode has no obvious change around the EPB point, implying that elastic deformation is a major part of the total deformation before the EPB point.
- The deformation is obviously reflected by the evolution of the state-of-stress mode around the failure starting point. Compared with the state-of-stress mode of the EPB point and failure starting point, it is obvious that the plastic deformation gradually accumulates and becomes dominant from point EPB to the failure starting point. When the plastic accumulation develops to the failure starting point, the evolution curves of mutate to the other shape, which embodies the plastic deformation around the failure starting point from a quantitative change to qualitative change.
- The deformation around the progressive failure point is smallest even opposite among all the deformations in the working process of the pavement. This indicates that the elastic/plastic deformation has completely disappeared and that the pavement has entered a broken state. The state-of-stress mode and the characteristic parameter show that the evolution features are different from those before the progressive failure point.
- The EPB point is the normal working branch point of the pavement service, so it could be directly taken as the design point of the pavement’s load-bearing capacity. The failure starting point is the starting point of the pavement’s failure process, which provides a reference to the design and accurate estimation of safety for asphalt pavements. Therefore, this study could explore a new way to analyze the working law of asphalt airport pavements.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Date Presenting Point A (13 January 2015) | Three Dates before and after Point A (Before: 30 December 2014 → 5 January 2015; After: 15 January 2015 → 22 January 2015) | |||||||
---|---|---|---|---|---|---|---|---|
No. of pass (1, 2, 3, k) | 1 | 2 | 3 | Last k | 1 | 2 | 3 | Last k |
Strains (l = 1, 2, …, n) | εl,1 | εl,2 | εl,3 | εl,k | ε′l,1 | ε′l,2 | ε′l,3 | ε′l,k |
State variables (Δεt) | ε′l,1 − εl,1 | ε′l,2 − εl,2 | ε′l,3 − εl,3 | ε′l,k − εl,k |
The Date Presenting Point A (13 January 2015) and the Date before and after Point A (Before: 6 January 2015; After: 20 January 2015) | ||||
---|---|---|---|---|
No. of selected pass | 1 | 2 | … | 12 |
MDD-A (l = 1, 2, …, n) | dAl,1 | dAi,2, | … | dAl,12 |
MDD-F (l = 1, 2, …, n) | dFl,1 | dFl,2 | … | dFl,12 |
State variables () | dFl,1 − dA,1l | dFl,2 − dAl,2 | … | dFl,12 − dAl,12 |
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Chen, S.; Liu, J.; Zhou, G.; Hou, X. Essential Working Features of Asphalt Airport Pavement Revealed by Structural State-of-Stress Theory. Buildings 2024, 14, 2707. https://doi.org/10.3390/buildings14092707
Chen S, Liu J, Zhou G, Hou X. Essential Working Features of Asphalt Airport Pavement Revealed by Structural State-of-Stress Theory. Buildings. 2024; 14(9):2707. https://doi.org/10.3390/buildings14092707
Chicago/Turabian StyleChen, Shuaikun, Jianmin Liu, Guangchun Zhou, and Xiaomeng Hou. 2024. "Essential Working Features of Asphalt Airport Pavement Revealed by Structural State-of-Stress Theory" Buildings 14, no. 9: 2707. https://doi.org/10.3390/buildings14092707