Study on Principal Stress Axis Rotations and Direction Cosines of Asphalt Pavement Under Moving Loadings

DONG Pengjun; TANG Boming; CAO Xuejuan

doi:10.21656/1000-0887.450214

Volume 46 Issue 9

Sep. 2025

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Article Navigation > Applied Mathematics and Mechanics > 2025 > 46(9): 1119-1129

DONG Pengjun, TANG Boming, CAO Xuejuan. Study on Principal Stress Axis Rotations and Direction Cosines of Asphalt Pavement Under Moving Loadings[J]. Applied Mathematics and Mechanics, 2025, 46(9): 1119-1129. doi: 10.21656/1000-0887.450214

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Study on Principal Stress Axis Rotations and Direction Cosines of Asphalt Pavement Under Moving Loadings

doi: 10.21656/1000-0887.450214

1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, P.R.China;
2. National and Local Joint Engineering Research Center of Transportation and Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, P.R.China;
3. School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, P.R.China

Funds:

The National Science Foundation of China(52278441)

Received Date: 2024-07-16
Rev Recd Date: 2024-12-04

Available Online: 2025-10-17

Abstract

Abstract

To reveal the damage mechanism of asphalt pavement under single and multiple loadings with respect to the variations in the magnitude and direction of the principal stress, an asphalt pavement structure model was constructed with the finite element method. The stress paths and the direction cosine variations of the principal stresses in asphalt pavement structural elements under different numbers of axle loads were investigated. The results show that, under both single and multiple loadings, the stress path and the rotation intensity of the principal stress axis in the pavement structural elements change over time. During the movement of the load, as the wheel passes over the examined section, the direction cosine value corresponding to the principal stress alternates between positive and negative ones. Moreover, due to the interactions between different wheels, the positive and negative peak values of the direction cosines for different wheels differ. The direction cosine values of the 1st principal stress alternately switch between positive and negative ones both in the transverse and longitudinal directions, indicating that the principal stress direction experiences abrupt changes during vehicle loading. Furthermore, the alternations become more complex under multiple wheel loadings. Under prolonged cyclic loadings, this can lead to the formation of cracks in the pavement.
- asphalt pavement,
- load quantity,
- principal axis of stress,
- directional cosine,
- numerical simulation

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References(30)

References

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