基于损伤容限设计理论的沥青疲劳与断裂行为机制研究：特征判别、力学准则及性能预测

doi:10.3969/j.issn.1674-0696.2025.01.02

摘要/Abstract

摘要： 以沥青疲劳与断裂行为机制作为研究对象，基于损伤容限设计理论对沥青疲劳裂纹萌生与扩展的特征判别、力学准则及性能预测开展了系统研究。将能量释放率峰值点作为材料的失效判据，并提出了沥青疲劳裂纹萌生及扩展行为的特征判别方法；分别基于损伤力学和断裂力学方法建立了裂纹萌生与扩展阶段的力学行为准则，提出了沥青裂纹萌生寿命与裂纹扩展寿命的预测方法。该分析方法有助于精细化理解和表征沥青的疲劳与断裂过程。

关键词: 道路工程；沥青疲劳；裂纹萌生；裂纹扩展；本构模型

Abstract: A systematic study was conducted on the feature discrimination, mechanistic criterion and performance prediction of asphalt fatigue crack initiation and propagation, which was based on damage tolerance design theory and took asphalt fatigue and fracture behavior mechanism as the research object. The peak value of energy release rate was used as the failure criterion for materials, and a feature discrimination method for the initiation and propagation behavior of asphalt fatigue cracks was proposed. The mechanistic criteria for the crack initiation and propagation phases were established by means of the damage mechanics and fracture mechanics, respectively. The prediction methods for the crack initiation life and crack propagation life were also developed. The proposed analysis method helps to refine the understanding and characterization of the fatigue and fracture processes of asphalt.

Key words: road engineering; asphalt fatigue; crack initiation; crack propagation; constitutive model

中图分类号:

U414

王超，孙彦广，任正阳. 基于损伤容限设计理论的沥青疲劳与断裂行为机制研究：特征判别、力学准则及性能预测[J]. 重庆交通大学学报（自然科学版）, 2025, 44(1): 8-16.

WANG Chao, SUN Yanguang, REN Zhengyang. Fatigue and Fracture Behavior Mechanism of Asphalt Based on Damage Tolerance Design Theory: Feature Discrimination,Mechanistic Criterion and Performance Prediction[J]. Journal of Chongqing Jiaotong University(Natural Science), 2025, 44(1): 8-16.

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