Fatigue Performance of Cracked Bridge Diaphragm Repaired by SMA/CFRP Composite Patch
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Bibliographic Details
| Author(s): |
Xuhong Qiang
(Tongji University, Shanghai, China)
Yapeng Wu (Tongji University, Shanghai, China) Xu Jiang (Tongji University, Shanghai, China) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Bridges and Structures: Connection, Integration and Harmonisation, Nanjing, People's Republic of China, 21-23 September 2022 | ||||
| Published in: | IABSE Congress Nanjing 2022 | ||||
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| Page(s): | 1650-1658 | ||||
| Total no. of pages: | 9 | ||||
| DOI: | 10.2749/nanjing.2022.1650 | ||||
| Abstract: |
Under long-term service conditions, fatigue cracks are easily generated at the arc-shape cutouts in diaphragm of the orthotropic steel bridge decks when subjected to vehicle-induced vibration and cyclical wheel loads. For repairing cracks in diaphragm, this paper proposes the carbon fiber reinforced polymer (CFRP) sheets patched crack-stop hole method and shape memory alloys (SMA)/CFRP composite patched crack-stop hole method which introduces prestress by activating SMA. Moreover, in the numerical study the diaphragm model and reinforcement schemes are introduced, and the corresponding finite element model is established. The failure modes and fatigue lives of diaphragm specimens under different repair methods were obtained and compared by fatigue loading tests. It can be found that the bonding of CFRP sheets and SMA/CFRP composite patches can effectively postone the initiation of fatigue cracks and inhibit the propagation of cracks, which are ideal repair methods for strengthening the fatigue cracks of diaphragms in orthotropic steel bridge decks. |
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| Keywords: |
finite element simulation bridge engineering Fatigue test crack of diaphragm structural reinforcement
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| Copyright: | © 2022 International Association for Bridge and Structural Engineering (IABSE) | ||||
| License: | This creative work is copyrighted material and may not be used without explicit approval by the author and/or copyright owner. |
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