Corrosion-fatigue synergy in steel bridges: Mechanisms and mechanical degradation
This study pioneers the investigation of asynchronous corrosion-fatigue coupling effects on structural steel degradation, addressing a critical gap in understanding synergistic damage mechanisms under combined environmental and mechanical stresses. Through systematic experimentation under three serv...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025023072 |
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| Summary: | This study pioneers the investigation of asynchronous corrosion-fatigue coupling effects on structural steel degradation, addressing a critical gap in understanding synergistic damage mechanisms under combined environmental and mechanical stresses. Through systematic experimentation under three service conditions (isolated corrosion, isolated fatigue, and asynchronous corrosion-fatigue coupling), key innovations include: (1) Quantification of a two-stage corrosion kinetics regime influenced by protective oxide layer formation; (2) Identification of an initial mechanical strengthening phase followed by progressive degradation, with yield strength showing 50 % reduction post-corrosion in coupled conditions; (3) Discovery of fatigue-induced ductility enhancement concurrent with strength loss in asynchronous coupling scenarios. These findings establish new mechanistic insights into time-dependent corrosion-fatigue interactions, providing a paradigm shift for predictive maintenance and corrosion-resistant design in steel bridge engineering. |
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| ISSN: | 2590-1230 |