加载次序对沥青混合料疲劳损伤累积的影响

doi:10.11896/cldb.22080209

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Abstract The accumulation process of fatigue damage of asphalt mixture under variable amplitude loading exhibits an obvious nonlinear characteristic. However, the traditional linear damage accumulation criterion fails to characterize the nonlinear fatigue damage accumulation (NLFDA) under different loading sequences. This study aims to investigate the effects of loading sequence on the fatigue damage accumulation of asphalt mixture. First, the fatigue tests with constant amplitude loading were carried out to investigate the fatigue damage accumulation under constant amplitude loading. Then, the SCB fatigue tests with variable amplitude loading were conducted to analyze the fatigue damage accumulation under variable amplitude loading. Finally, the NLFDA model considering the loading sequence was established to analyze the effects of loading sequence on the fatigue damage accumulation of asphalt mixture. It was found that the fatigue damage of asphalt mixture under constant amplitude loading evolved nonlinearly, however, it obeyed linear damage accumulation criterion and the cumulative life fractions are equal to one. The variable amplitude loading can lead to that the fatigue damage evolves nonlinearly and obeys nonlinear damage accumulation criterion, and the cumulative life fractions of the loading sequences of low-high and high-low are greater than one and less than one, respectively. The established NLFDA model can effectively characterize the dependence of the fatigue damage of asphalt mixture on the loading sequence.

Key words： road engineering fatigue damage accumulation loading sequence asphalt mixture

Published: Online: 2023-12-19

CLC number:

U414

Fund:National Natural Science Foundation of China (52108421, 51308084).

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	Articles by authors
	FANG Chenze
	GUO Naisheng
	JIANG Jiwang
	LENG Zhen
	LI Hui
	LU Guoyang
	WANG Haopeng

Cite this article:

FANG Chenze,GUO Naisheng,JIANG Jiwang, et al. Effects of Loading Sequence on Fatigue Damage Accumulation of Asphalt Mixture[J]. Materials Reports, 2023, 37(24): 22080209-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.22080209 OR http://www.mater-rep.com/EN/Y2023/V37/I24/22080209

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