Structural Safety Assessment of a Suspension Bridge using Analysis Model Updating
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Bibliographic Details
| Author(s): |
JunYong Park
(Seoul National University, Seoul, South Korea)
Woong-Hee Jung (Seoul National University, Seoul, South Korea) Sunjoong Kim (Seoul National University, Seoul, South Korea) Ho-Kyung Kim 
(Seoul National University, Seoul, South Korea)
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Workshop: Ignorance, Uncertainty, and Human Errors in Structural Engineering, Helsinki, Finland, 15-16 February 2017 | ||||
| Published in: | IABSE Workshop Helsinki 2017 | ||||
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| Page(s): | 47-50 | ||||
| Total no. of pages: | 4 | ||||
| DOI: | 10.2749/helsinki.2017.047 | ||||
| Abstract: | A reduction in concrete compressive strength is detected in the main tower of a suspension bridge. Since this strength is below the design strength, structural safety assessment is required. Ambient vibration tests (AVTs) were performed to identify current dynamic of the bridge with 56 dense installation point of accelerometers. Manual tuning method is applied to update analysis model based on measured dynamic properties. As a result, errors between the analysis and measurement of the natural frequencies are reduced from 9% to 4%. Automated model updating method with sensitivity-based optimization is additionally applied to update analysis model. Finally, update model has errors of natural frequencies below 2%. Utilizing the updated model, structural safety assessment is performed considering live load, wind load and seismic load. | ||||
| Keywords: |
assessment ambient vibration tests manual tuning automated model updating
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