| Autor: |
Shuhei Kawami, Tatsumasa Kaita, Kenshin Maruhashi, Sae Teranishi |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Proceedings of International Structural Engineering and Construction. 9 |
| ISSN: |
2644-108X |
| DOI: |
10.14455/isec.2022.9(2).str-15 |
| Popis: |
In Japan, drawing reasonable maintenance scenarios are required because increase in aging bridges is becoming more serious problem. For implementing maintenance scenarios, it will be effective to predict the deterioration of remaining load bearing capacity of structural members or whole bridge considering with corrosion damages in steel bridges. In this study, numerical corrosion surfaces which assumed until 120 years after were generated intending for actual aging truss bridge (about 100 years old) with many local corrosion damages. Each local corrosion surfaces were generated by using a simple corrosion progress model depending on probability distribution. Then, finite element analyses of this truss bridge which has numerical local corrosion surfaces were carried out for clarifying remaining load bearing capacity. Ultimate load bearing capacity was estimated from the maximum live-load magnification (αmax) based on load-rating method in whole bridge analyses. Also, the deterioration curve of remaining load bearing capacity on whole bridge can be obtained as the relationship between the ï¡max and elapsed years (t). From the analytical results, the maximum load bearing capacity of the initial state model was estimated to αmax=2.98 if the L live load in JSHB was assumed. And remaining load bearing capacity of whole bridge assuming after 120 years was estimated to αmax =2.35 from αmax-t relation. It will mean that the load bearing capacity has been decreased 21.1% than initial state. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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