期刊
APPLIED SCIENCES-BASEL
卷 6, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/app6040099
关键词
probabilistic analysis; fatigue crack growth; cable; steel wire; cable-stayed bridge; multiscaling; mesoscopic fracture mechanics
类别
资金
- Natural Science Foundation of Jiangsu [BK20130023]
- Jiangsu Transportation Department [2014Y02]
- Graduate Research Innovation Project of Jiangsu Province [KYLX15-0087]
Fatigue fracture of bridge stay-cables is usually a multiscale process as the crack grows from micro-scale to macro-scale. Such a process, however, is highly uncertain. In order to make a rational prediction of the residual life of bridge cables, a probabilistic fatigue approach is proposed, based on a comprehensive vehicle load model, finite element analysis and multiscaling and mesoscopic fracture mechanics. Uncertainties in both material properties and external loads are considered. The proposed method is demonstrated through the fatigue life prediction of cables of the Runyang Cable-Stayed Bridge in China, and it is found that cables along the bridge spans may have significantly different fatigue lives, and due to the variability, some of them may have shorter lives than those as expected from the design.
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