Effects of Loading Sequence on Fatigue Damage Accumulation of Asphalt Mixture

Fang, C, Guo, N, Jiang, J, Leng, Z, Li, H, Lu, G and Wang, H ORCID: 0000-0002-5008-7322 (2023) Effects of Loading Sequence on Fatigue Damage Accumulation of Asphalt Mixture. Cailiao Daobao/Materials Reports, 37 (24).

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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.

Item Type:	Article
Divisions:	Faculty of Science and Engineering > School of Engineering
Depositing User:	Symplectic Admin
Date Deposited:	19 Feb 2024 11:28
Last Modified:	29 Apr 2024 10:21
DOI:	10.11896/cldb.22080209
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3178773