原文传递
Evaluating the Threshold for Corrosion-to-Fatigue Crack Transition Using a Corroded Steel Plate from an In-Service Bridge
| 题名： | Evaluating the Threshold for Corrosion-to-Fatigue Crack Transition Using a Corroded Steel Plate from an In-Service Bridge |
| 正文语种： | eng |
| 作者： | An, Lee-Sak;Park, Yeun Chul;Lee, Sang Hyeon;Kim, Ho-Kyung |
| 作者单位： | Seoul Natl Univ Dept Civil & Environm Engn 1 Gwanak Ro Seoul 08826 South Korea;Hannam Univ Dept Civil & Environm Engn 70 Hannan Ro Daejeon 34430 South Korea;Seoul Natl Univ Dept Civil & Environm Engn 1 Gwanak Ro Seoul 08826 South Korea;Seoul Natl Univ Dept Civil & Environm Engn 1 Gwanak Ro Seoul 08826 South Korea |
| 关键词： | Corrosion;Fatigue test;Corrosion-to-fatigue crack transition;General corrosion;Fatigue threshold |
| 摘要： | The linear elastic fracture mechanics (LEFM)-based approach has been widely applied to investigate the threshold for corrosion-to-fatigue crack transition in the corrosion fatigue process. However, investigations to determine the transition threshold of generally corroded steel are still insufficient. In the present study, the threshold for the corrosion-to-fatigue crack transition was investigated via fatigue testing of naturally corroded steel plates. The specimens were procured from the corroded U-ribs obtained from a cable-stayed bridge that has been in operation for more than 30 years. Profiles of the corroded surface were obtained via three-dimensional scanning. Stress intensity factor ranges and stress concentration factors were examined as potential indicators of a threshold for corrosion-to-fatigue crack transition. These factors, however, proved to be inappropriate. Modified stress intensity factor range was proposed to consider the shape-dependent effect of stress concentration from corrosion damage, and a consistent threshold of corrosion-to-fatigue crack transition was identified. These results are a novel finding whereby the corrosion-to-fatigue crack transition could occur when the modified stress intensity factor range exceeds 600 MPa root mm. (C) 2022 American Society of Civil Engineers. |
| 出版年： | 2022 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 148 |
| 期： | 6 |
| 页码： | 04022060.1-04022060.12 |
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